[ "$header" ]
}
-branch=`readlink "$GIT_DIR/HEAD"`
+branch=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD)
case "$branch" in
refs/heads/master) ;;
*) echo "# On branch $branch" ;;
git-update-index --refresh >/dev/null 2>&1
-if test -f "$GIT_DIR/HEAD"
+if GIT_DIR="$GIT_DIR" git-rev-parse --verify HEAD >/dev/null 2>&1
then
git-diff-index -M --cached HEAD |
sed 's/^://' |