bisect reset: Leave the tree in usable state if git-checkout failed

I had local modifications in the tree and doing bisect reset required me to
manually edit .git/HEAD.

Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-bisect.sh b/git-bisect.sh
index 06a8d26945a679b06438308ceb96c69cd76c43db..6da31e87a01af9b883958b3b0bae4304bfa94520 100755 (executable)
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -179,11 +179,12 @@ bisect_reset() {
         *)
            usage ;;
        esac
-       git checkout "$branch" &&
-       rm -fr "$GIT_DIR/refs/bisect"
-       rm -f "$GIT_DIR/refs/heads/bisect" "$GIT_DIR/head-name"
-       rm -f "$GIT_DIR/BISECT_LOG"
-       rm -f "$GIT_DIR/BISECT_NAMES"
+       if git checkout "$branch"; then
+               rm -fr "$GIT_DIR/refs/bisect"
+               rm -f "$GIT_DIR/refs/heads/bisect" "$GIT_DIR/head-name"
+               rm -f "$GIT_DIR/BISECT_LOG"
+               rm -f "$GIT_DIR/BISECT_NAMES"
+       fi
 }
 
 bisect_replay () {