git status: Show uncommitted submodule changes too when enabled

When the configuration variable status.submodulesummary is not 0 or false, "git status" shows the submodule summary of the staged submodule commits. But it did not show the summary of those commits not yet staged in the supermodule, making it hard to see what will not be committed.

The output of "submodule summary --for-status" has been changed from "# Modified submodules:" to "# Submodule changes to be committed:" for the already staged changes. "# Submodules changed but not updated:" has been added for changes that will not be committed. This is much clearer and consistent with the output for regular files.

---

While looking for ways to teach "git status" how to show dirty submodules i came across this functionality. I think the output of only the staged submodule changes is not enough, submodule commits not staged in the superproject should be shown too (At the time this functionality was introduced the "--files" option to "git submodule summary" was missing, so there was no way to show the unstaged submodule changes back then).

 git-submodule.sh             |    6 +++++-
 t/t7401-submodule-summary.sh |    2 +-
 t/t7508-status.sh            |    4 ++--
 wt-status.c                  |   12 +++++++-----
 4 files changed, 15 insertions(+), 9 deletions(-)

index 77d2232..664f217 100755
@@ -688,7 +688,11 @@ cmd_summary() {
 		echo
 	done |
 	if test -n "$for_status"; then
-		echo "# Modified submodules:"
+		if [ -n "$files" ]; then
+			echo "# Submodules changed but not updated:"
+		else
+			echo "# Submodule changes to be committed:"
+		fi
 		echo "#"
 		sed -e 's|^|# |' -e 's|^# $|#|'
 	else

index 6cc16c3..d3c039f 100755
@@ -213,7 +213,7 @@ EOF
 test_expect_success '--for-status' "
     git submodule summary --for-status HEAD^ >actual &&
     test_cmp actual - <<EOF
-# Modified submodules:
+# Submodule changes to be committed:
 #
 # * sm1 $head6...0000000:
 #

index cf67fe3..556d0fa 100755
@@ -579,7 +579,7 @@ cat >expect <<EOF
 #
 #	modified:   dir1/modified
 #
-# Modified submodules:
+# Submodule changes to be committed:
 #
 # * sm 0000000...$head (1):
 #   > Add foo

@@ -672,7 +672,7 @@ cat >expect <<EOF
 #
 #	modified:   dir1/modified
 #
-# Modified submodules:
+# Submodule changes to be committed:
 #
 # * sm 0000000...$head (1):
 #   > Add foo

index 65feb29..5807fc3 100644
@@ -459,7 +459,7 @@ static void wt_status_print_changed(struct wt_status *s)
 	wt_status_print_trailer(s);
 }
 
-static void wt_status_print_submodule_summary(struct wt_status *s)
+static void wt_status_print_submodule_summary(struct wt_status *s, int uncommitted)
 {
 	struct child_process sm_summary;
 	char summary_limit[64];

@@ -468,11 +468,11 @@ static void wt_status_print_submodule_summary(struct wt_status *s)
 	const char *argv[] = {
 		"submodule",
 		"summary",
-		"--cached",
+		uncommitted ? "--files" : "--cached",
 		"--for-status",
 		"--summary-limit",
 		summary_limit,
-		s->amend ? "HEAD^" : "HEAD",
+		uncommitted ? NULL : (s->amend ? "HEAD^" : "HEAD"),
 		NULL
 	};
 

@@ -580,8 +580,10 @@ void wt_status_print(struct wt_status *s)
 	wt_status_print_updated(s);
 	wt_status_print_unmerged(s);
 	wt_status_print_changed(s);
-	if (s->submodule_summary)
-		wt_status_print_submodule_summary(s);
+	if (s->submodule_summary) {
+		wt_status_print_submodule_summary(s, 0);  /* staged */
+		wt_status_print_submodule_summary(s, 1);  /* unstaged */
+	}
 	if (s->show_untracked_files)
 		wt_status_print_untracked(s);
 	else if (s->commitable)

1.6.6.327.g4c0c1.dirty