1 files changed, 47 insertions, 20 deletions

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 404cef77d9..36e4231821 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -619,9 +619,7 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 	const char *name = NULL, *url = NULL, *depth = NULL;
 	int quiet = 0;
 	int progress = 0;
-	FILE *submodule_dot_git;
 	char *p, *path = NULL, *sm_gitdir;
-	struct strbuf rel_path = STRBUF_INIT;
 	struct strbuf sb = STRBUF_INIT;
 	struct string_list reference = STRING_LIST_INIT_NODUP;
 	char *sm_alternate = NULL, *error_strategy = NULL;
@@ -693,27 +691,12 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 		strbuf_reset(&sb);
 	}
 
-	/* Write a .git file in the submodule to redirect to the superproject. */
-	strbuf_addf(&sb, "%s/.git", path);
-	if (safe_create_leading_directories_const(sb.buf) < 0)
-		die(_("could not create leading directories of '%s'"), sb.buf);
-	submodule_dot_git = fopen(sb.buf, "w");
-	if (!submodule_dot_git)
-		die_errno(_("cannot open file '%s'"), sb.buf);
-
-	fprintf_or_die(submodule_dot_git, "gitdir: %s\n",
-		       relative_path(sm_gitdir, path, &rel_path));
-	if (fclose(submodule_dot_git))
-		die(_("could not close file %s"), sb.buf);
-	strbuf_reset(&sb);
-	strbuf_reset(&rel_path);
+	/* Connect module worktree and git dir */
+	connect_work_tree_and_git_dir(path, sm_gitdir);
 
-	/* Redirect the worktree of the submodule in the superproject's config */
 	p = git_pathdup_submodule(path, "config");
 	if (!p)
 		die(_("could not get submodule directory for '%s'"), path);
-	git_config_set_in_file(p, "core.worktree",
-			       relative_path(path, sm_gitdir, &rel_path));
 
 	/* setup alternateLocation and alternateErrorStrategy in the cloned submodule if needed */
 	git_config_get_string("submodule.alternateLocation", &sm_alternate);
@@ -729,7 +712,6 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 	free(error_strategy);
 
 	strbuf_release(&sb);
-	strbuf_release(&rel_path);
 	free(sm_gitdir);
 	free(path);
 	free(p);
@@ -1123,6 +1105,50 @@ static int resolve_remote_submodule_branch(int argc, const char **argv,
 	return 0;
 }
 
+static int push_check(int argc, const char **argv, const char *prefix)
+{
+	struct remote *remote;
+
+	if (argc < 2)
+		die("submodule--helper push-check requires at least 1 argument");
+
+	/*
+	 * The remote must be configured.
+	 * This is to avoid pushing to the exact same URL as the parent.
+	 */
+	remote = pushremote_get(argv[1]);
+	if (!remote || remote->origin == REMOTE_UNCONFIGURED)
+		die("remote '%s' not configured", argv[1]);
+
+	/* Check the refspec */
+	if (argc > 2) {
+		int i, refspec_nr = argc - 2;
+		struct ref *local_refs = get_local_heads();
+		struct refspec *refspec = parse_push_refspec(refspec_nr,
+							     argv + 2);
+
+		for (i = 0; i < refspec_nr; i++) {
+			struct refspec *rs = refspec + i;
+
+			if (rs->pattern || rs->matching)
+				continue;
+
+			/*
+			 * LHS must match a single ref
+			 * NEEDSWORK: add logic to special case 'HEAD' once
+			 * working with submodules in a detached head state
+			 * ceases to be the norm.
+			 */
+			if (count_refspec_match(rs->src, local_refs, NULL) != 1)
+				die("src refspec '%s' must name a ref",
+				    rs->src);
+		}
+		free_refspec(refspec_nr, refspec);
+	}
+
+	return 0;
+}
+
 static int absorb_git_dirs(int argc, const char **argv, const char *prefix)
 {
 	int i;
@@ -1188,6 +1214,7 @@ static struct cmd_struct commands[] = {
 	{"resolve-relative-url-test", resolve_relative_url_test, 0},
 	{"init", module_init, SUPPORT_SUPER_PREFIX},
 	{"remote-branch", resolve_remote_submodule_branch, 0},
+	{"push-check", push_check, 0},
 	{"absorb-git-dirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},
 	{"is-active", is_active, 0},
 };