From ce32660edc2b83c6fdf550f6869e0b01e255dadb Mon Sep 17 00:00:00 2001
From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Date: Sun, 10 Feb 2008 13:59:50 +0000
Subject: bisect: allow starting with a detached HEAD

Instead of insisting on a symbolic ref, bisect now accepts detached
HEADs, too.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 git-bisect.sh | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'git-bisect.sh')

diff --git a/git-bisect.sh b/git-bisect.sh
index 5385249890..393fa35584 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -26,6 +26,9 @@ OPTIONS_SPEC=
 . git-sh-setup
 require_work_tree
 
+_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
+_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
+
 sq() {
 	@@PERL@@ -e '
 		for (@ARGV) {
@@ -60,7 +63,8 @@ bisect_start() {
 	# top-of-line master first!
 	#
 	head=$(GIT_DIR="$GIT_DIR" git symbolic-ref HEAD) ||
-	die "Bad HEAD - I need a symbolic ref"
+	head=$(GIT_DIR="$GIT_DIR" git rev-parse --verify HEAD) ||
+	die "Bad HEAD - I need a HEAD"
 	case "$head" in
 	refs/heads/bisect)
 		if [ -s "$GIT_DIR/head-name" ]; then
@@ -70,7 +74,7 @@ bisect_start() {
 		fi
 		git checkout $branch || exit
 		;;
-	refs/heads/*)
+	refs/heads/*|$_x40)
 		[ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
 		echo "${head#refs/heads/}" >"$GIT_DIR/head-name"
 		;;
-- 
cgit v1.2.3