[thirdparty/git.git] / git-bisect.sh

#!/bin/sh

USAGE='[start|bad|good|next|reset|visualize|replay|log|run]'
LONG_USAGE='git bisect start [<bad> [<good>...]] [--] [<pathspec>...]
        reset bisect state and start bisection.
git bisect bad [<rev>]
        mark <rev> a known-bad revision.
git bisect good [<rev>...]
        mark <rev>... known-good revisions.
git bisect next
        find next bisection to test and check it out.
git bisect reset [<branch>]
        finish bisection search and go back to branch.
git bisect visualize
        show bisect status in gitk.
git bisect replay <logfile>
        replay bisection log.
git bisect log
        show bisect log.
git bisect run <cmd>...
        use <cmd>... to automatically bisect.'

. git-sh-setup
require_work_tree

sq() {
	@@PERL@@ -e '
		for (@ARGV) {
			s/'\''/'\'\\\\\'\''/g;
			print " '\''$_'\''";
		}
		print "\n";
	' "$@"
}

bisect_autostart() {
	test -d "$GIT_DIR/refs/bisect" || {
		echo >&2 'You need to start by "git bisect start"'
		if test -t 0
		then
			echo >&2 -n 'Do you want me to do it for you [Y/n]? '
			read yesno
			case "$yesno" in
			[Nn]*)
				exit ;;
			esac
			bisect_start
		else
			exit 1
		fi
	}
}

bisect_start() {
	#
	# Verify HEAD. If we were bisecting before this, reset to the
	# top-of-line master first!
	#
	head=$(GIT_DIR="$GIT_DIR" git symbolic-ref HEAD) ||
	die "Bad HEAD - I need a symbolic ref"
	case "$head" in
	refs/heads/bisect)
		if [ -s "$GIT_DIR/head-name" ]; then
		    branch=`cat "$GIT_DIR/head-name"`
		else
		    branch=master
		fi
		git checkout $branch || exit
		;;
	refs/heads/*)
		[ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
		echo "$head" | sed 's#^refs/heads/##' >"$GIT_DIR/head-name"
		;;
	*)
		die "Bad HEAD - strange symbolic ref"
		;;
	esac

	#
	# Get rid of any old bisect state
	#
	bisect_clean_state
	mkdir "$GIT_DIR/refs/bisect"

	#
	# Check for one bad and then some good revisions.
	#
	has_double_dash=0
	for arg; do
	    case "$arg" in --) has_double_dash=1; break ;; esac
	done
	orig_args=$(sq "$@")
	bad_seen=0
	while [ $# -gt 0 ]; do
	    arg="$1"
	    case "$arg" in
	    --)
		shift
		break
		;;
	    *)
		rev=$(git rev-parse --verify "$arg^{commit}" 2>/dev/null) || {
		    test $has_double_dash -eq 1 &&
		        die "'$arg' does not appear to be a valid revision"
		    break
		}
		if [ $bad_seen -eq 0 ]; then
		    bad_seen=1
		    bisect_write_bad "$rev"
		else
		    bisect_write_good "$rev"
		fi
		shift
		;;
	    esac
	done

	sq "$@" >"$GIT_DIR/BISECT_NAMES"
	echo "git-bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG"
	bisect_auto_next
}

bisect_bad() {
	bisect_autostart
	case "$#" in
	0)
		rev=$(git rev-parse --verify HEAD) ;;
	1)
		rev=$(git rev-parse --verify "$1^{commit}") ;;
	*)
		usage ;;
	esac || exit
	bisect_write_bad "$rev"
	echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
	bisect_auto_next
}

bisect_write_bad() {
	rev="$1"
	echo "$rev" >"$GIT_DIR/refs/bisect/bad"
	echo "# bad: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
}

bisect_good() {
	bisect_autostart
	case "$#" in
	0)    revs=$(git rev-parse --verify HEAD) || exit ;;
	*)    revs=$(git rev-parse --revs-only --no-flags "$@") &&
		test '' != "$revs" || die "Bad rev input: $@" ;;
	esac
	for rev in $revs
	do
		rev=$(git rev-parse --verify "$rev^{commit}") || exit
		bisect_write_good "$rev"
		echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
	done
	bisect_auto_next
}

bisect_write_good() {
	rev="$1"
	echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
	echo "# good: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
}

bisect_next_check() {
	missing_good= missing_bad=
	git show-ref -q --verify refs/bisect/bad || missing_bad=t
	test -n "$(git for-each-ref "refs/bisect/good-*")" || missing_good=t

	case "$missing_good,$missing_bad,$1" in
	,,*)
		: have both good and bad - ok
		;;
	*,)
		# do not have both but not asked to fail - just report.
		false
		;;
	t,,good)
		# have bad but not good.  we could bisect although
		# this is less optimum.
		echo >&2 'Warning: bisecting only with a bad commit.'
		if test -t 0
		then
			printf >&2 'Are you sure [Y/n]? '
			case "$(read yesno)" in [Nn]*) exit 1 ;; esac
		fi
		: bisect without good...
		;;
	*)
		THEN=''
		test -d "$GIT_DIR/refs/bisect" || {
			echo >&2 'You need to start by "git bisect start".'
			THEN='then '
		}
		echo >&2 'You '$THEN'need to give me at least one good' \
			'and one bad revisions.'
		echo >&2 '(You can use "git bisect bad" and' \
			'"git bisect good" for that.)'
		exit 1 ;;
	esac
}

bisect_auto_next() {
	bisect_next_check && bisect_next || :
}

bisect_next() {
	case "$#" in 0) ;; *) usage ;; esac
	bisect_autostart
	bisect_next_check good

	bad=$(git rev-parse --verify refs/bisect/bad) &&
	good=$(git for-each-ref --format='^%(objectname)' \
		"refs/bisect/good-*" | tr '[\012]' ' ') &&
	eval="git rev-list --bisect-vars $good $bad --" &&
	eval="$eval $(cat "$GIT_DIR/BISECT_NAMES")" &&
	eval=$(eval "$eval") &&
	eval "$eval" || exit

	if [ -z "$bisect_rev" ]; then
		echo "$bad was both good and bad"
		exit 1
	fi
	if [ "$bisect_rev" = "$bad" ]; then
		echo "$bisect_rev is first bad commit"
		git diff-tree --pretty $bisect_rev
		exit 0
	fi

	echo "Bisecting: $bisect_nr revisions left to test after this"
	echo "$bisect_rev" >"$GIT_DIR/refs/heads/new-bisect"
	git checkout -q new-bisect || exit
	mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" &&
	GIT_DIR="$GIT_DIR" git symbolic-ref HEAD refs/heads/bisect
	git show-branch "$bisect_rev"
}

bisect_visualize() {
	bisect_next_check fail
	not=`cd "$GIT_DIR/refs" && echo bisect/good-*`
	eval gitk bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
}

bisect_reset() {
	case "$#" in
	0) if [ -s "$GIT_DIR/head-name" ]; then
	       branch=`cat "$GIT_DIR/head-name"`
	   else
	       branch=master
	   fi ;;
	1) git show-ref --verify --quiet -- "refs/heads/$1" || {
	       echo >&2 "$1 does not seem to be a valid branch"
	       exit 1
	   }
	   branch="$1" ;;
	*)
	    usage ;;
	esac
	if git checkout "$branch"; then
		rm -f "$GIT_DIR/head-name"
		bisect_clean_state
	fi
}

bisect_clean_state() {
	rm -fr "$GIT_DIR/refs/bisect"
	rm -f "$GIT_DIR/refs/heads/bisect"
	rm -f "$GIT_DIR/BISECT_LOG"
	rm -f "$GIT_DIR/BISECT_NAMES"
	rm -f "$GIT_DIR/BISECT_RUN"
}

bisect_replay () {
	test -r "$1" || {
		echo >&2 "cannot read $1 for replaying"
		exit 1
	}
	bisect_reset
	while read bisect command rev
	do
		test "$bisect" = "git-bisect" || continue
		case "$command" in
		start)
			cmd="bisect_start $rev"
			eval "$cmd"
			;;
		good)
			echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
			echo "# good: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
			echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
			;;
		bad)
			echo "$rev" >"$GIT_DIR/refs/bisect/bad"
			echo "# bad: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
			echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
			;;
		*)
			echo >&2 "?? what are you talking about?"
			exit 1 ;;
		esac
	done <"$1"
	bisect_auto_next
}

bisect_run () {
    bisect_next_check fail

    while true
    do
      echo "running $@"
      "$@"
      res=$?

      # Check for really bad run error.
      if [ $res -lt 0 -o $res -ge 128 ]; then
	  echo >&2 "bisect run failed:"
	  echo >&2 "exit code $res from '$@' is < 0 or >= 128"
	  exit $res
      fi

      # Use "bisect_good" or "bisect_bad"
      # depending on run success or failure.
      if [ $res -gt 0 ]; then
	  next_bisect='bisect_bad'
      else
	  next_bisect='bisect_good'
      fi

      # We have to use a subshell because bisect_good or
      # bisect_bad functions can exit.
      ( $next_bisect > "$GIT_DIR/BISECT_RUN" )
      res=$?

      cat "$GIT_DIR/BISECT_RUN"

      if [ $res -ne 0 ]; then
	  echo >&2 "bisect run failed:"
	  echo >&2 "$next_bisect exited with error code $res"
	  exit $res
      fi

      if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
	  echo "bisect run success"
	  exit 0;
      fi

    done
}


case "$#" in
0)
    usage ;;
*)
    cmd="$1"
    shift
    case "$cmd" in
    start)
        bisect_start "$@" ;;
    bad)
        bisect_bad "$@" ;;
    good)
        bisect_good "$@" ;;
    next)
        # Not sure we want "next" at the UI level anymore.
        bisect_next "$@" ;;
    visualize)
	bisect_visualize "$@" ;;
    reset)
        bisect_reset "$@" ;;
    replay)
	bisect_replay "$@" ;;
    log)
	cat "$GIT_DIR/BISECT_LOG" ;;
    run)
        bisect_run "$@" ;;
    *)
        usage ;;
    esac
esac
Commit	Line	Data
8cc6a083	1	#!/bin/sh
d025524d	2
a17c4101	3	USAGE='[start\|bad\|good\|next\|reset\|visualize\|replay\|log\|run]'
38a47fd6 CC	4	LONG_USAGE='git bisect start [<bad> [<good>...]] [--] [<pathspec>...]
	5	reset bisect state and start bisection.
	6	git bisect bad [<rev>]
	7	mark <rev> a known-bad revision.
	8	git bisect good [<rev>...]
	9	mark <rev>... known-good revisions.
	10	git bisect next
	11	find next bisection to test and check it out.
	12	git bisect reset [<branch>]
	13	finish bisection search and go back to branch.
	14	git bisect visualize
	15	show bisect status in gitk.
	16	git bisect replay <logfile>
	17	replay bisection log.
	18	git bisect log
	19	show bisect log.
	20	git bisect run <cmd>...
	21	use <cmd>... to automatically bisect.'
d025524d	22
ae2b0f15	23	. git-sh-setup
4c550686	24	require_work_tree
8cc6a083	25
e9a45d75	26	sq() {
d9bffc08	27	@@PERL@@ -e '
e9a45d75 JH	28	for (@ARGV) {
	29	s/'\''/'\'\\\\\'\''/g;
	30	print " '\''$_'\''";
	31	}
	32	print "\n";
	33	' "$@"
	34	}
	35
8cc6a083 LT	36	bisect_autostart() {
	37	test -d "$GIT_DIR/refs/bisect" \|\| {
	38	echo >&2 'You need to start by "git bisect start"'
	39	if test -t 0
	40	then
	41	echo >&2 -n 'Do you want me to do it for you [Y/n]? '
	42	read yesno
	43	case "$yesno" in
	44	[Nn]*)
	45	exit ;;
	46	esac
	47	bisect_start
	48	else
	49	exit 1
	50	fi
	51	}
	52	}
	53
	54	bisect_start() {
8cc6a083 LT	55	#
	56	# Verify HEAD. If we were bisecting before this, reset to the
	57	# top-of-line master first!
	58	#
5be60078	59	head=$(GIT_DIR="$GIT_DIR" git symbolic-ref HEAD) \|\|
8098a178	60	die "Bad HEAD - I need a symbolic ref"
8cc6a083	61	case "$head" in
673e5838	62	refs/heads/bisect)
810255fd PB	63	if [ -s "$GIT_DIR/head-name" ]; then
	64	branch=`cat "$GIT_DIR/head-name"`
	65	else
	66	branch=master
8fe26f44	67	fi
810255fd	68	git checkout $branch \|\| exit
8cc6a083 LT	69	;;
8cc6a083 LT	70	refs/heads/*)
810255fd PB	71	[ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
810255fd PB	72	echo "$head" \| sed 's#^refs/heads/##' >"$GIT_DIR/head-name"
8cc6a083 LT	73	;;
8cc6a083 LT	74	*)
8098a178	75	die "Bad HEAD - strange symbolic ref"
8cc6a083 LT	76	;;
	77	esac
	78
	79	#
	80	# Get rid of any old bisect state
	81	#
38a47fd6	82	bisect_clean_state
8cc6a083	83	mkdir "$GIT_DIR/refs/bisect"
38a47fd6 CC	84
	85	#
	86	# Check for one bad and then some good revisions.
	87	#
	88	has_double_dash=0
	89	for arg; do
	90	case "$arg" in --) has_double_dash=1; break ;; esac
	91	done
	92	orig_args=$(sq "$@")
	93	bad_seen=0
	94	while [ $# -gt 0 ]; do
	95	arg="$1"
	96	case "$arg" in
	97	--)
8fe26f44	98	shift
38a47fd6 CC	99	break
	100	;;
	101	*)
8fe26f44	102	rev=$(git rev-parse --verify "$arg^{commit}" 2>/dev/null) \|\| {
38a47fd6 CC	103	test $has_double_dash -eq 1 &&
	104	die "'$arg' does not appear to be a valid revision"
	105	break
	106	}
	107	if [ $bad_seen -eq 0 ]; then
	108	bad_seen=1
	109	bisect_write_bad "$rev"
	110	else
	111	bisect_write_good "$rev"
	112	fi
8fe26f44	113	shift
38a47fd6 CC	114	;;
38a47fd6 CC	115	esac
8fe26f44	116	done
38a47fd6 CC	117
38a47fd6 CC	118	sq "$@" >"$GIT_DIR/BISECT_NAMES"
b8652b4d	119	echo "git-bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG"
38a47fd6	120	bisect_auto_next
8cc6a083 LT	121	}
	122
	123	bisect_bad() {
	124	bisect_autostart
cc9f24d0 JH	125	case "$#" in
cc9f24d0 JH	126	0)
5be60078	127	rev=$(git rev-parse --verify HEAD) ;;
cc9f24d0	128	1)
5be60078	129	rev=$(git rev-parse --verify "$1^{commit}") ;;
cc9f24d0 JH	130	*)
	131	usage ;;
	132	esac \|\| exit
38a47fd6	133	bisect_write_bad "$rev"
e204de28	134	echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
8cc6a083 LT	135	bisect_auto_next
	136	}
	137
38a47fd6 CC	138	bisect_write_bad() {
	139	rev="$1"
	140	echo "$rev" >"$GIT_DIR/refs/bisect/bad"
5be60078	141	echo "# bad: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
38a47fd6 CC	142	}
38a47fd6 CC	143
8cc6a083 LT	144	bisect_good() {
8cc6a083 LT	145	bisect_autostart
8fe26f44	146	case "$#" in
5be60078 JH	147	0) revs=$(git rev-parse --verify HEAD) \|\| exit ;;
5be60078 JH	148	*) revs=$(git rev-parse --revs-only --no-flags "$@") &&
cc9f24d0	149	test '' != "$revs" \|\| die "Bad rev input: $@" ;;
8cc6a083 LT	150	esac
	151	for rev in $revs
	152	do
5be60078	153	rev=$(git rev-parse --verify "$rev^{commit}") \|\| exit
38a47fd6	154	bisect_write_good "$rev"
e204de28	155	echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
8cc6a083 LT	156	done
	157	bisect_auto_next
	158	}
	159
38a47fd6 CC	160	bisect_write_good() {
	161	rev="$1"
	162	echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
5be60078	163	echo "# good: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
38a47fd6 CC	164	}
38a47fd6 CC	165
8cc6a083	166	bisect_next_check() {
0a5280a9 JH	167	missing_good= missing_bad=
	168	git show-ref -q --verify refs/bisect/bad \|\| missing_bad=t
	169	test -n "$(git for-each-ref "refs/bisect/good-*")" \|\| missing_good=t
6fecf191	170
0a5280a9 JH	171	case "$missing_good,$missing_bad,$1" in
	172	,,*)
	173	: have both good and bad - ok
	174	;;
	175	*,)
	176	# do not have both but not asked to fail - just report.
	177	false
	178	;;
	179	t,,good)
	180	# have bad but not good. we could bisect although
	181	# this is less optimum.
	182	echo >&2 'Warning: bisecting only with a bad commit.'
	183	if test -t 0
	184	then
	185	printf >&2 'Are you sure [Y/n]? '
	186	case "$(read yesno)" in [Nn]*) exit 1 ;; esac
	187	fi
	188	: bisect without good...
	189	;;
8cc6a083	190	*)
0a5280a9 JH	191	THEN=''
	192	test -d "$GIT_DIR/refs/bisect" \|\| {
	193	echo >&2 'You need to start by "git bisect start".'
	194	THEN='then '
	195	}
	196	echo >&2 'You '$THEN'need to give me at least one good' \
	197	'and one bad revisions.'
	198	echo >&2 '(You can use "git bisect bad" and' \
	199	'"git bisect good" for that.)'
	200	exit 1 ;;
8cc6a083 LT	201	esac
	202	}
	203
	204	bisect_auto_next() {
434d036f	205	bisect_next_check && bisect_next \|\| :
8cc6a083 LT	206	}
	207
	208	bisect_next() {
8fe26f44	209	case "$#" in 0) ;; *) usage ;; esac
8cc6a083	210	bisect_autostart
0a5280a9 JH	211	bisect_next_check good
0a5280a9 JH	212
5be60078	213	bad=$(git rev-parse --verify refs/bisect/bad) &&
0a5280a9 JH	214	good=$(git for-each-ref --format='^%(objectname)' \
0a5280a9 JH	215	"refs/bisect/good-*" \| tr '[\012]' ' ') &&
5be60078	216	eval="git rev-list --bisect-vars $good $bad --" &&
0a5280a9 JH	217	eval="$eval $(cat "$GIT_DIR/BISECT_NAMES")" &&
	218	eval=$(eval "$eval") &&
	219	eval "$eval" \|\| exit
	220
	221	if [ -z "$bisect_rev" ]; then
	222	echo "$bad was both good and bad"
	223	exit 1
670f5fe3	224	fi
0a5280a9 JH	225	if [ "$bisect_rev" = "$bad" ]; then
0a5280a9 JH	226	echo "$bisect_rev is first bad commit"
5be60078	227	git diff-tree --pretty $bisect_rev
0a5280a9	228	exit 0
8cc6a083	229	fi
0a5280a9 JH	230
	231	echo "Bisecting: $bisect_nr revisions left to test after this"
	232	echo "$bisect_rev" >"$GIT_DIR/refs/heads/new-bisect"
08f16750	233	git checkout -q new-bisect \|\| exit
8cc6a083	234	mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" &&
5be60078 JH	235	GIT_DIR="$GIT_DIR" git symbolic-ref HEAD refs/heads/bisect
5be60078 JH	236	git show-branch "$bisect_rev"
8cc6a083 LT	237	}
8cc6a083 LT	238
cc9f24d0 JH	239	bisect_visualize() {
cc9f24d0 JH	240	bisect_next_check fail
e9a45d75 JH	241	not=`cd "$GIT_DIR/refs" && echo bisect/good-*`
e9a45d75 JH	242	eval gitk bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
cc9f24d0 JH	243	}
cc9f24d0 JH	244
8cc6a083 LT	245	bisect_reset() {
8cc6a083 LT	246	case "$#" in
810255fd PB	247	0) if [ -s "$GIT_DIR/head-name" ]; then
	248	branch=`cat "$GIT_DIR/head-name"`
	249	else
	250	branch=master
	251	fi ;;
5be60078	252	1) git show-ref --verify --quiet -- "refs/heads/$1" \|\| {
8cc6a083 LT	253	echo >&2 "$1 does not seem to be a valid branch"
	254	exit 1
	255	}
	256	branch="$1" ;;
8fe26f44	257	*)
8cc6a083 LT	258	usage ;;
8cc6a083 LT	259	esac
9b709e47	260	if git checkout "$branch"; then
38a47fd6 CC	261	rm -f "$GIT_DIR/head-name"
38a47fd6 CC	262	bisect_clean_state
9b709e47	263	fi
e204de28 JH	264	}
e204de28 JH	265
38a47fd6 CC	266	bisect_clean_state() {
	267	rm -fr "$GIT_DIR/refs/bisect"
	268	rm -f "$GIT_DIR/refs/heads/bisect"
	269	rm -f "$GIT_DIR/BISECT_LOG"
	270	rm -f "$GIT_DIR/BISECT_NAMES"
	271	rm -f "$GIT_DIR/BISECT_RUN"
	272	}
	273
e204de28 JH	274	bisect_replay () {
	275	test -r "$1" \|\| {
	276	echo >&2 "cannot read $1 for replaying"
	277	exit 1
	278	}
	279	bisect_reset
	280	while read bisect command rev
	281	do
	282	test "$bisect" = "git-bisect" \|\| continue
	283	case "$command" in
	284	start)
e9a45d75 JH	285	cmd="bisect_start $rev"
e9a45d75 JH	286	eval "$cmd"
e204de28 JH	287	;;
	288	good)
	289	echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
5be60078	290	echo "# good: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
e204de28 JH	291	echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
	292	;;
	293	bad)
	294	echo "$rev" >"$GIT_DIR/refs/bisect/bad"
5be60078	295	echo "# bad: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
e204de28 JH	296	echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
	297	;;
	298	*)
	299	echo >&2 "?? what are you talking about?"
	300	exit 1 ;;
	301	esac
	302	done <"$1"
	303	bisect_auto_next
8cc6a083 LT	304	}
8cc6a083 LT	305
a17c4101	306	bisect_run () {
83020120 CC	307	bisect_next_check fail
83020120 CC	308
a17c4101 CC	309	while true
	310	do
	311	echo "running $@"
	312	"$@"
	313	res=$?
	314
	315	# Check for really bad run error.
	316	if [ $res -lt 0 -o $res -ge 128 ]; then
	317	echo >&2 "bisect run failed:"
	318	echo >&2 "exit code $res from '$@' is < 0 or >= 128"
	319	exit $res
	320	fi
	321
	322	# Use "bisect_good" or "bisect_bad"
	323	# depending on run success or failure.
	324	if [ $res -gt 0 ]; then
	325	next_bisect='bisect_bad'
	326	else
	327	next_bisect='bisect_good'
	328	fi
	329
	330	# We have to use a subshell because bisect_good or
	331	# bisect_bad functions can exit.
	332	( $next_bisect > "$GIT_DIR/BISECT_RUN" )
	333	res=$?
	334
	335	cat "$GIT_DIR/BISECT_RUN"
	336
	337	if [ $res -ne 0 ]; then
	338	echo >&2 "bisect run failed:"
	339	echo >&2 "$next_bisect exited with error code $res"
	340	exit $res
	341	fi
	342
	343	if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
	344	echo "bisect run success"
	345	exit 0;
	346	fi
	347
	348	done
	349	}
	350
	351
8cc6a083 LT	352	case "$#" in
	353	0)
	354	usage ;;
	355	*)
	356	cmd="$1"
	357	shift
	358	case "$cmd" in
	359	start)
	360	bisect_start "$@" ;;
	361	bad)
	362	bisect_bad "$@" ;;
	363	good)
	364	bisect_good "$@" ;;
	365	next)
	366	# Not sure we want "next" at the UI level anymore.
	367	bisect_next "$@" ;;
cc9f24d0 JH	368	visualize)
cc9f24d0 JH	369	bisect_visualize "$@" ;;
8cc6a083 LT	370	reset)
8cc6a083 LT	371	bisect_reset "$@" ;;
e204de28 JH	372	replay)
	373	bisect_replay "$@" ;;
	374	log)
	375	cat "$GIT_DIR/BISECT_LOG" ;;
a17c4101 CC	376	run)
a17c4101 CC	377	bisect_run "$@" ;;
8cc6a083 LT	378	*)
	379	usage ;;
	380	esac
	381	esac