[PATCH 2/2] fetch: Get submodule paths from index and not from .gitmodules

[Jens Lehmann <Jens.Lehmann@web.de>]

In the first version the .gitmodules file was parsed and all submodules
found there were recursively fetched. This can lead to problems when the
.gitmodules file is not properly set up. "git submodule update" gets
this information from the index via "git ls-files", lets do the same here.

Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
---
 submodule.c |   25 +++++++++++++++++++------
 1 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/submodule.c b/submodule.c
index a62cae5..209efa4 100644
--- a/submodule.c
+++ b/submodule.c
@@ -240,7 +240,7 @@ void show_submodule_summary(FILE *f, const char *path,

 int fetch_populated_submodules(int forced)
 {
-	int result = 0;
+	int i, result = 0;
 	struct child_process cp;
 	const char *argv[] = {
 		"fetch",
@@ -251,31 +251,44 @@ int fetch_populated_submodules(int forced)
 	if (!work_tree)
 		return 0;

+	if (!the_index.initialized)
+		if (read_cache() < 0)
+			die("index file corrupt");
+
 	memset(&cp, 0, sizeof(cp));
 	cp.argv = argv;
 	cp.env = local_repo_env;
 	cp.git_cmd = 1;
 	cp.no_stdin = 1;

-	for_each_string_list_item(name_for_path, &config_name_for_path) {
+	for (i = 0; i < active_nr; i++) {
 		struct strbuf submodule_path = STRBUF_INIT;
 		struct strbuf submodule_git_dir = STRBUF_INIT;
-		const char *git_dir;
+		struct cache_entry *ce = active_cache[i];
+		const char *git_dir, *name;
+
+		if (!S_ISGITLINK(ce->ce_mode))
+			continue;
+
+		name = ce->name;
+		name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name);
+		if (name_for_path)
+			name = name_for_path->util;

 		if (!forced) {
 			struct string_list_item *fetch_option;
-			fetch_option = unsorted_string_list_lookup(&config_fetch_for_name, name_for_path->util);
+			fetch_option = unsorted_string_list_lookup(&config_fetch_for_name, name);
 			if (fetch_option && !fetch_option->util)
 				continue;
 		}

-		strbuf_addf(&submodule_path, "%s/%s", work_tree, name_for_path->string);
+		strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name);
 		strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
 		git_dir = read_gitfile_gently(submodule_git_dir.buf);
 		if (!git_dir)
 			git_dir = submodule_git_dir.buf;
 		if (is_directory(git_dir)) {
-			printf("Fetching submodule %s\n", name_for_path->string);
+			printf("Fetching submodule %s\n", ce->name);
 			cp.dir = submodule_path.buf;
 			if (run_command(&cp))
 				result = 1;
-- 
1.7.3.rc2.234.g00c0