worktree: update is_bare heuristics

diff --git a/git-submodule.sh b/git-submodule.sh
index 02a0d728174a0201c966abd73299d03c198d03b4..b5f2beee60ab59a04b5b236da8df39403009db1b 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -850,8 +850,11 @@ cmd_summary() {
                        ;;
                esac
 
-               sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
-               sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
+               sha1_abbr_src=$(GIT_DIR="$name/.git" git rev-parse --short $sha1_src 2>/dev/null ||
+                       echo $sha1_src | cut -c1-7)
+               sha1_abbr_dst=$(GIT_DIR="$name/.git" git rev-parse --short $sha1_dst 2>/dev/null ||
+                       echo $sha1_dst | cut -c1-7)
+
                if test $status = T
                then
                        blob="$(gettext "blob")"