#!/bin/sh

[ -z "${R2_MASTER}" ] && R2_MASTER="${PWD}/.."
COPIES=~/prg/r2-v

if ! test -d "${R2_MASTER}"; then
	echo "Cannot find master copy of r2 at R2_MASTER=${R2_MASTER}"
	exit 1
fi


if ! mkdir -p "${COPIES}"; then
	echo "Cannot create COPIES=${COPIES}"
	exit 1
fi

echo "Using R2_MASTER ${R2_MASTER}"
echo "Using COPIES ${COPIES}"


Fail() {
	printf "%s" "$1\n"
	exit 1
}

Head() {
	cd ${R2_MASTER}   || Fail "cannot chdir to ${R2_MASTER}"
	git rev-list HEAD |  head -n1
}

Next() {
	cd ${R2_MASTER}   || Fail "cannot chdir to ${R2_MASTER}"
	git rev-list HEAD | grep -C 1 $1 |head -n1
}

Prev() {
	cd ${R2_MASTER}   || Fail "cannot chdir to ${R2_MASTER}"
	git rev-list HEAD | grep -C 1 $1 |tail -n1
}

Cur() {
	if test -f ${COPIES}/cur; then
		cat ${COPIES}/cur
	else
		echo "Run init first"
	fi
}

Note() {
	if test -n "$1"; then
		if test -n "$2"; then
			echo "$2" > ${COPIES}/radare2-$1.note
		else
			cat ${COPIES}/radare2-$1.note
		fi
	else
		echo "Missing argument"
	fi
}

Clone() {
	cd ${COPIES} || exit 1
	if [ ! -d ${COPIES}/radare2-${1} ]; then
		echo "$1  git clone"
		git clone ${R2_MASTER} radare2-${1} > /dev/null 2>&1
	fi
	if [ ! -d ${COPIES}/radare2-${1} ]; then
		echo "Cant clone"
		exit 1
	fi
	cd radare2-${1}
	if [ -d .git ]; then
		git reset --hard $1 || exit 1
		mv .git _git
	fi
	if [ ! -f binr/radare2/radare2 ]; then
		echo "$1  make"
		sys/install.sh > ${COPIES}/radare2-${1}.log 2>&1 || exit 1
	fi
	echo "$1  symstall"
	sudo make symstall >> ${COPIES}/radare2-${1}.log
	echo $1 > ${COPIES}/cur
}

case "$1" in
init)
	Clone `Head`
	;;
log)
	cd ${R2_MASTER} || Fail "cannot chdir to ${R2_MASTER}"
	cur=`Cur`
	for a in `git rev-list HEAD` ; do
		NOTE=`cat ${COPIES}/radare2-${a}.note 2>/dev/null`
		if [ "$cur" = "$a" ]; then
			echo "$a  [CUR] <<<< $NOTE"
		elif [ -d "${COPIES}/radare2-${a}" ]; then
			echo "$a  [x] $NOTE"
		else
			echo "$a  $NOTE"
		fi
	done
	;;
head)
	Head
	;;
ls)
	if [ -d "${COPIES}" ]; then
		cd ${COPIES}
		for a in radare2-* ; do
			echo $a
		done
	else
		echo "Run 'init' first"
	fi
	;;
up)
	$0 use `Prev $(Cur)`
	;;
cur)
	Cur
	;;
down)
	$0 use `Next $(Cur)`
	;;
rm)
	if [ -n "$2" ]; then
		if [ -d "${COPIES}/radare2-$2" ]; then
			rm -rf "${COPIES}/radare2-$2"
		else
			echo "Invalid ref"
		fi
	else
		echo "Usage rm [file]"
	fi
	;;
good)
	Note `Cur` good
	;;
bad)
	Note `Cur` bad
	;;
reset)
	rm ${COPIES}/*.note
	;;
note)
	Note $2 $3
	;;
diff)
	cd ${R2_MASTER} || Fail "cannot chdir to ${R2_MASTER}"
	git diff `Cur`^..`Cur`
	;;
use)
	Clone $2
	;;
''|-h|help|-?)
	echo "Usage: r2-v [cmd] ([arg])      - Radare2 Version Manager"
	echo "  init                 initialize r2-v repository"
	echo "  cur                  show current commit"
	echo "  head                 show last commit"
	echo "  ls                   list all build"
	echo "  log                  show log history with marks and notes"
	echo "  use [commit]         build and install this commit"
	echo "  up                   build and install previous commit"
	echo "  down                 build and install next commit"
	echo "  rm [commit]          remove build"
	echo "  reset                reset/remove all notes"
	echo "  good | bad           mark current commit as good or bad"
	echo "  note [commit] [msg]  add note for given commit"
	;;
esac