git-rebase: allow rebasing a detached HEAD.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-rebase.sh b/git-rebase.sh
index c8bd0f99d1306cd311eaf45f73581efc8bb0e512..99cedadda1da1ba2f62c22acfbd6477b1b2b38cb 100755 (executable)
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -275,8 +275,12 @@ case "$#" in
        git-checkout "$2" || usage
        ;;
 *)
-       branch_name=`git symbolic-ref HEAD` || die "No current branch"
-       branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'`
+       if branch_name=`git symbolic-ref -q HEAD`
+       then
+               branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'`
+       else
+               branch_name=HEAD ;# detached
+       fi
        ;;
 esac
 branch=$(git-rev-parse --verify "${branch_name}^0") || exit