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7374cb857c
Calls to this method may dominate generation time in some cases. Measurements for configuring cmake itself show a cache hit rate of ~57% (7753 total calls, 4453 cache hits). For a larger project (that also makes use of custom targets as prerequisite for all compile targets), the measured cache hit ratio is ~96% (2530827 total calls, 2433124 cache hits). For this project the observable cmake runtime could be reduced from 40s to 30s. Signed-off-by: Matthias Maennich <matthias@maennich.net>
474 lines
17 KiB
C++
474 lines
17 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#ifndef cmGlobalNinjaGenerator_h
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#define cmGlobalNinjaGenerator_h
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <iosfwd>
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#include <map>
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#include <set>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include "cmGlobalCommonGenerator.h"
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#include "cmGlobalGenerator.h"
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#include "cmGlobalGeneratorFactory.h"
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#include "cmNinjaTypes.h"
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#include "cmPolicies.h"
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#include "cm_codecvt.hxx"
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class cmCustomCommand;
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class cmGeneratedFileStream;
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class cmGeneratorTarget;
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class cmLinkLineComputer;
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class cmLocalGenerator;
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class cmMakefile;
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class cmOutputConverter;
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class cmStateDirectory;
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class cmake;
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struct cmDocumentationEntry;
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/**
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* \class cmGlobalNinjaGenerator
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* \brief Write a build.ninja file.
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*
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* The main differences between this generator and the UnixMakefile
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* generator family are:
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* - We don't care about VERBOSE variable or RULE_MESSAGES property since
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* it is handle by Ninja's -v option.
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* - We don't care about computing any progress status since Ninja manages
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* it itself.
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* - We don't care about generating a clean target since Ninja already have
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* a clean tool.
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* - We generate one build.ninja and one rules.ninja per project.
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* - We try to minimize the number of generated rules: one per target and
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* language.
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* - We use Ninja special variable $in and $out to produce nice output.
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* - We extensively use Ninja variable overloading system to minimize the
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* number of generated rules.
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*/
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class cmGlobalNinjaGenerator : public cmGlobalCommonGenerator
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{
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public:
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/// The default name of Ninja's build file. Typically: build.ninja.
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static const char* NINJA_BUILD_FILE;
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/// The default name of Ninja's rules file. Typically: rules.ninja.
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/// It is included in the main build.ninja file.
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static const char* NINJA_RULES_FILE;
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/// The indentation string used when generating Ninja's build file.
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static const char* INDENT;
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/// The shell command used for a no-op.
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static std::string const SHELL_NOOP;
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/// Write @a count times INDENT level to output stream @a os.
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static void Indent(std::ostream& os, int count);
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/// Write a divider in the given output stream @a os.
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static void WriteDivider(std::ostream& os);
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static std::string EncodeRuleName(std::string const& name);
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static std::string EncodeIdent(const std::string& ident, std::ostream& vars);
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static std::string EncodeLiteral(const std::string& lit);
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std::string EncodePath(const std::string& path);
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cmLinkLineComputer* CreateLinkLineComputer(
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cmOutputConverter* outputConverter,
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cmStateDirectory const& stateDir) const override;
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/**
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* Write the given @a comment to the output stream @a os. It
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* handles new line character properly.
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*/
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static void WriteComment(std::ostream& os, const std::string& comment);
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/**
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* Utilized by the generator factory to determine if this generator
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* supports toolsets.
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*/
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static bool SupportsToolset() { return false; }
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/**
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* Utilized by the generator factory to determine if this generator
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* supports platforms.
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*/
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static bool SupportsPlatform() { return false; }
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bool IsIPOSupported() const override { return true; }
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/**
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* Write a build statement to @a os with the @a comment using
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* the @a rule the list of @a outputs files and inputs.
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* It also writes the variables bound to this build statement.
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* @warning no escaping of any kind is done here.
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*/
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void WriteBuild(std::ostream& os, const std::string& comment,
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const std::string& rule, const cmNinjaDeps& outputs,
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const cmNinjaDeps& implicitOuts,
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const cmNinjaDeps& explicitDeps,
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const cmNinjaDeps& implicitDeps,
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const cmNinjaDeps& orderOnlyDeps,
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const cmNinjaVars& variables,
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const std::string& rspfile = std::string(),
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int cmdLineLimit = 0, bool* usedResponseFile = nullptr);
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/**
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* Helper to write a build statement with the special 'phony' rule.
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*/
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void WritePhonyBuild(std::ostream& os, const std::string& comment,
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const cmNinjaDeps& outputs,
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const cmNinjaDeps& explicitDeps,
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const cmNinjaDeps& implicitDeps = cmNinjaDeps(),
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const cmNinjaDeps& orderOnlyDeps = cmNinjaDeps(),
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const cmNinjaVars& variables = cmNinjaVars());
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void WriteCustomCommandBuild(const std::string& command,
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const std::string& description,
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const std::string& comment,
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const std::string& depfile, bool uses_terminal,
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bool restat, const cmNinjaDeps& outputs,
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const cmNinjaDeps& deps = cmNinjaDeps(),
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const cmNinjaDeps& orderOnly = cmNinjaDeps());
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void WriteMacOSXContentBuild(const std::string& input,
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const std::string& output);
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/**
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* Write a rule statement named @a name to @a os with the @a comment,
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* the mandatory @a command, the @a depfile and the @a description.
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* It also writes the variables bound to this rule statement.
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* @warning no escaping of any kind is done here.
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*/
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static void WriteRule(std::ostream& os, const std::string& name,
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const std::string& command,
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const std::string& description,
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const std::string& comment, const std::string& depfile,
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const std::string& deptype, const std::string& rspfile,
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const std::string& rspcontent,
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const std::string& restat, bool generator);
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/**
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* Write a variable named @a name to @a os with value @a value and an
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* optional @a comment. An @a indent level can be specified.
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* @warning no escaping of any kind is done here.
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*/
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static void WriteVariable(std::ostream& os, const std::string& name,
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const std::string& value,
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const std::string& comment = "", int indent = 0);
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/**
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* Write an include statement including @a filename with an optional
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* @a comment to the @a os stream.
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*/
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static void WriteInclude(std::ostream& os, const std::string& filename,
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const std::string& comment = "");
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/**
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* Write a default target statement specifying @a targets as
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* the default targets.
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*/
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static void WriteDefault(std::ostream& os, const cmNinjaDeps& targets,
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const std::string& comment = "");
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bool IsGCCOnWindows() const { return UsingGCCOnWindows; }
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public:
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cmGlobalNinjaGenerator(cmake* cm);
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static cmGlobalGeneratorFactory* NewFactory()
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{
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return new cmGlobalGeneratorSimpleFactory<cmGlobalNinjaGenerator>();
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}
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~cmGlobalNinjaGenerator() override {}
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cmLocalGenerator* CreateLocalGenerator(cmMakefile* mf) override;
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std::string GetName() const override
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{
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return cmGlobalNinjaGenerator::GetActualName();
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}
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static std::string GetActualName() { return "Ninja"; }
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/** Get encoding used by generator for ninja files */
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codecvt::Encoding GetMakefileEncoding() const override;
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static void GetDocumentation(cmDocumentationEntry& entry);
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void EnableLanguage(std::vector<std::string> const& languages,
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cmMakefile* mf, bool optional) override;
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void GenerateBuildCommand(std::vector<std::string>& makeCommand,
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const std::string& makeProgram,
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const std::string& projectName,
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const std::string& projectDir,
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const std::string& targetName,
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const std::string& config, bool fast, bool verbose,
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std::vector<std::string> const& makeOptions =
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std::vector<std::string>()) override;
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// Setup target names
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const char* GetAllTargetName() const override { return "all"; }
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const char* GetInstallTargetName() const override { return "install"; }
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const char* GetInstallLocalTargetName() const override
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{
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return "install/local";
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}
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const char* GetInstallStripTargetName() const override
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{
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return "install/strip";
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}
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const char* GetTestTargetName() const override { return "test"; }
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const char* GetPackageTargetName() const override { return "package"; }
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const char* GetPackageSourceTargetName() const override
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{
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return "package_source";
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}
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const char* GetEditCacheTargetName() const override { return "edit_cache"; }
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const char* GetRebuildCacheTargetName() const override
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{
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return "rebuild_cache";
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}
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const char* GetCleanTargetName() const override { return "clean"; }
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cmGeneratedFileStream* GetBuildFileStream() const
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{
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return this->BuildFileStream;
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}
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cmGeneratedFileStream* GetRulesFileStream() const
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{
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return this->RulesFileStream;
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}
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std::string const& ConvertToNinjaPath(const std::string& path) const;
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struct MapToNinjaPathImpl
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{
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cmGlobalNinjaGenerator* GG;
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MapToNinjaPathImpl(cmGlobalNinjaGenerator* gg)
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: GG(gg)
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{
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}
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std::string operator()(std::string const& path)
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{
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return this->GG->ConvertToNinjaPath(path);
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}
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};
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MapToNinjaPathImpl MapToNinjaPath() { return MapToNinjaPathImpl(this); }
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void AddCXXCompileCommand(const std::string& commandLine,
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const std::string& sourceFile);
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/**
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* Add a rule to the generated build system.
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* Call WriteRule() behind the scene but perform some check before like:
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* - Do not add twice the same rule.
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*/
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void AddRule(const std::string& name, const std::string& command,
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const std::string& description, const std::string& comment,
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const std::string& depfile, const std::string& deptype,
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const std::string& rspfile, const std::string& rspcontent,
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const std::string& restat, bool generator);
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bool HasRule(const std::string& name);
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void AddCustomCommandRule();
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void AddMacOSXContentRule();
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bool HasCustomCommandOutput(const std::string& output)
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{
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return this->CustomCommandOutputs.find(output) !=
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this->CustomCommandOutputs.end();
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}
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/// Called when we have seen the given custom command. Returns true
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/// if we has seen it before.
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bool SeenCustomCommand(cmCustomCommand const* cc)
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{
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return !this->CustomCommands.insert(cc).second;
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}
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/// Called when we have seen the given custom command output.
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void SeenCustomCommandOutput(const std::string& output)
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{
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this->CustomCommandOutputs.insert(output);
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// We don't need the assumed dependencies anymore, because we have
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// an output.
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this->AssumedSourceDependencies.erase(output);
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}
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void AddAssumedSourceDependencies(const std::string& source,
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const cmNinjaDeps& deps)
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{
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std::set<std::string>& ASD = this->AssumedSourceDependencies[source];
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// Because we may see the same source file multiple times (same source
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// specified in multiple targets), compute the union of any assumed
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// dependencies.
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ASD.insert(deps.begin(), deps.end());
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}
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void AppendTargetOutputs(
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cmGeneratorTarget const* target, cmNinjaDeps& outputs,
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cmNinjaTargetDepends depends = DependOnTargetArtifact);
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void AppendTargetDepends(
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cmGeneratorTarget const* target, cmNinjaDeps& outputs,
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cmNinjaTargetDepends depends = DependOnTargetArtifact);
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void AppendTargetDependsClosure(cmGeneratorTarget const* target,
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cmNinjaDeps& outputs);
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void AppendTargetDependsClosure(cmGeneratorTarget const* target,
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cmNinjaOuts& outputs, bool omit_self);
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void AddDependencyToAll(cmGeneratorTarget* target);
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void AddDependencyToAll(const std::string& input);
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const std::vector<cmLocalGenerator*>& GetLocalGenerators() const
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{
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return LocalGenerators;
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}
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bool IsExcluded(cmLocalGenerator* root, cmGeneratorTarget* target)
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{
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return cmGlobalGenerator::IsExcluded(root, target);
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}
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int GetRuleCmdLength(const std::string& name) { return RuleCmdLength[name]; }
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void AddTargetAlias(const std::string& alias, cmGeneratorTarget* target);
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void ComputeTargetObjectDirectory(cmGeneratorTarget* gt) const override;
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// Ninja generator uses 'deps' and 'msvc_deps_prefix' introduced in 1.3
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static std::string RequiredNinjaVersion() { return "1.3"; }
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static std::string RequiredNinjaVersionForConsolePool() { return "1.5"; }
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static std::string RequiredNinjaVersionForImplicitOuts() { return "1.7"; }
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bool SupportsConsolePool() const;
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bool SupportsImplicitOuts() const;
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std::string NinjaOutputPath(std::string const& path) const;
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bool HasOutputPathPrefix() const { return !this->OutputPathPrefix.empty(); }
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void StripNinjaOutputPathPrefixAsSuffix(std::string& path);
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bool WriteDyndepFile(std::string const& dir_top_src,
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std::string const& dir_top_bld,
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std::string const& dir_cur_src,
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std::string const& dir_cur_bld,
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std::string const& arg_dd,
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std::vector<std::string> const& arg_ddis,
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std::string const& module_dir,
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std::vector<std::string> const& linked_target_dirs);
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protected:
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void Generate() override;
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bool CheckALLOW_DUPLICATE_CUSTOM_TARGETS() const override { return true; }
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private:
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std::string GetEditCacheCommand() const override;
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bool FindMakeProgram(cmMakefile* mf) override;
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void CheckNinjaFeatures();
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bool CheckLanguages(std::vector<std::string> const& languages,
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cmMakefile* mf) const override;
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bool CheckFortran(cmMakefile* mf) const;
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void OpenBuildFileStream();
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void CloseBuildFileStream();
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void CloseCompileCommandsStream();
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void OpenRulesFileStream();
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void CloseRulesFileStream();
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/// Write the common disclaimer text at the top of each build file.
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void WriteDisclaimer(std::ostream& os);
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void WriteAssumedSourceDependencies();
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void WriteTargetAliases(std::ostream& os);
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void WriteFolderTargets(std::ostream& os);
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void WriteUnknownExplicitDependencies(std::ostream& os);
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void WriteBuiltinTargets(std::ostream& os);
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void WriteTargetAll(std::ostream& os);
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void WriteTargetRebuildManifest(std::ostream& os);
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void WriteTargetClean(std::ostream& os);
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void WriteTargetHelp(std::ostream& os);
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void ComputeTargetDependsClosure(
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cmGeneratorTarget const* target,
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std::set<cmGeneratorTarget const*>& depends);
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std::string ninjaCmd() const;
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/// The file containing the build statement. (the relationship of the
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/// compilation DAG).
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cmGeneratedFileStream* BuildFileStream;
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/// The file containing the rule statements. (The action attached to each
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/// edge of the compilation DAG).
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cmGeneratedFileStream* RulesFileStream;
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cmGeneratedFileStream* CompileCommandsStream;
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/// The type used to store the set of rules added to the generated build
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/// system.
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typedef std::set<std::string> RulesSetType;
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/// The set of rules added to the generated build system.
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RulesSetType Rules;
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/// Length of rule command, used by rsp file evaluation
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std::map<std::string, int> RuleCmdLength;
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/// The set of dependencies to add to the "all" target.
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cmNinjaDeps AllDependencies;
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bool UsingGCCOnWindows;
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/// The set of custom commands we have seen.
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std::set<cmCustomCommand const*> CustomCommands;
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/// The set of custom command outputs we have seen.
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std::set<std::string> CustomCommandOutputs;
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/// Whether we are collecting known build outputs and needed
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/// dependencies to determine unknown dependencies.
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bool ComputingUnknownDependencies;
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cmPolicies::PolicyStatus PolicyCMP0058;
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/// The combined explicit dependencies of custom build commands
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std::set<std::string> CombinedCustomCommandExplicitDependencies;
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/// When combined with CombinedCustomCommandExplicitDependencies it allows
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/// us to detect the set of explicit dependencies that have
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std::set<std::string> CombinedBuildOutputs;
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/// The mapping from source file to assumed dependencies.
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std::map<std::string, std::set<std::string>> AssumedSourceDependencies;
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typedef std::map<std::string, cmGeneratorTarget*> TargetAliasMap;
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TargetAliasMap TargetAliases;
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std::map<cmGeneratorTarget const*, cmNinjaOuts> TargetDependsClosures;
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/// the local cache for calls to ConvertToNinjaPath
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mutable std::unordered_map<std::string, std::string> ConvertToNinjaPathCache;
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std::string NinjaCommand;
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std::string NinjaVersion;
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bool NinjaSupportsConsolePool;
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bool NinjaSupportsImplicitOuts;
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unsigned long NinjaSupportsDyndeps;
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private:
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void InitOutputPathPrefix();
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std::string OutputPathPrefix;
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std::string TargetAll;
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std::string CMakeCacheFile;
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};
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#endif // ! cmGlobalNinjaGenerator_h
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