Merge branch 'bw/push-dry-run' into maint

"git push --dry-run --recurse-submodule=on-demand" wasn't
"--dry-run" in the submodules.

* bw/push-dry-run:
  push: fix --dry-run to not push submodules
  push: --dry-run updates submodules when --recurse-submodules=on-demand

submodule.c

@@ -661,16 +661,17 @@ int find_unpushed_submodules(struct sha1_array *commits,
 	return needs_pushing->nr;
 }
 
-static int push_submodule(const char *path)
+static int push_submodule(const char *path, int dry_run)
 {
 	if (add_submodule_odb(path))
 		return 1;
 
 	if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
 		struct child_process cp = CHILD_PROCESS_INIT;
-		const char *argv[] = {"push", NULL};
+		argv_array_push(&cp.args, "push");
+		if (dry_run)
+			argv_array_push(&cp.args, "--dry-run");
 
-		cp.argv = argv;
 		prepare_submodule_repo_env(&cp.env_array);
 		cp.git_cmd = 1;
 		cp.no_stdin = 1;
@@ -683,7 +684,9 @@ static int push_submodule(const char *path)
 	return 1;
 }
 
-int push_unpushed_submodules(struct sha1_array *commits, const char *remotes_name)
+int push_unpushed_submodules(struct sha1_array *commits,
+			     const char *remotes_name,
+			     int dry_run)
 {
 	int i, ret = 1;
 	struct string_list needs_pushing = STRING_LIST_INIT_DUP;
@@ -694,7 +697,7 @@ int push_unpushed_submodules(struct sha1_array *commits, const char *remotes_nam
 	for (i = 0; i < needs_pushing.nr; i++) {
 		const char *path = needs_pushing.items[i].string;
 		fprintf(stderr, "Pushing submodule '%s'\n", path);
-		if (!push_submodule(path)) {
+		if (!push_submodule(path, dry_run)) {
 			fprintf(stderr, "Unable to push submodule '%s'\n", path);
 			ret = 0;
 		}

submodule.h

@@ -65,7 +65,9 @@ int merge_submodule(unsigned char result[20], const char *path, const unsigned c
 		    const unsigned char a[20], const unsigned char b[20], int search);
 int find_unpushed_submodules(struct sha1_array *commits, const char *remotes_name,
 		struct string_list *needs_pushing);
-int push_unpushed_submodules(struct sha1_array *commits, const char *remotes_name);
+extern int push_unpushed_submodules(struct sha1_array *commits,
+				    const char *remotes_name,
+				    int dry_run);
 void connect_work_tree_and_git_dir(const char *work_tree, const char *git_dir);
 int parallel_submodules(void);
 

t/t5531-deep-submodule-push.sh

@@ -427,7 +427,31 @@ test_expect_success 'push unpushable submodule recursively fails' '
 		cd submodule.git &&
 		git rev-parse master >../actual
 	) &&
+	test_when_finished git -C work reset --hard master^ &&
 	test_cmp expected actual
 '
 
+test_expect_success 'push --dry-run does not recursively update submodules' '
+	(
+		cd work/gar/bage &&
+		git checkout master &&
+		git rev-parse master >../../../expected_submodule &&
+		> junk9 &&
+		git add junk9 &&
+		git commit -m "Ninth junk" &&
+
+		# Go up to 'work' directory
+		cd ../.. &&
+		git checkout master &&
+		git rev-parse master >../expected_pub &&
+		git add gar/bage &&
+		git commit -m "Ninth commit for gar/bage" &&
+		git push --dry-run --recurse-submodules=on-demand ../pub.git master
+	) &&
+	git -C submodule.git rev-parse master >actual_submodule &&
+	git -C pub.git rev-parse master >actual_pub &&
+	test_cmp expected_pub actual_pub &&
+	test_cmp expected_submodule actual_submodule
+'
+
 test_done

transport.c

@@ -955,15 +955,18 @@ int transport_push(struct transport *transport,
 				if (!is_null_oid(&ref->new_oid))
 					sha1_array_append(&commits, ref->new_oid.hash);
 
-			if (!push_unpushed_submodules(&commits, transport->remote->name)) {
+			if (!push_unpushed_submodules(&commits,
+						      transport->remote->name,
+						      pretend)) {
 				sha1_array_clear(&commits);
 				die("Failed to push all needed submodules!");
 			}
 			sha1_array_clear(&commits);
 		}
 
-		if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
-			      TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
+		if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
+		     ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) &&
+		      !pretend)) && !is_bare_repository()) {
 			struct ref *ref = remote_refs;
 			struct string_list needs_pushing = STRING_LIST_INIT_DUP;
 			struct sha1_array commits = SHA1_ARRAY_INIT;