submodule: try harder to fetch needed sha1 by direct fetching sha1

diff --git a/builtin/gc.c b/builtin/gc.c
index cb13ab72c3cce47ac0b91f2ae7c0f03395ba5b46..c583aad6ec2896c8a6ad3b35671e92a3c0478bcd 100644 (file)
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -46,6 +46,22 @@ static struct argv_array rerere = ARGV_ARRAY_INIT;
 static struct tempfile pidfile;
 static struct lock_file log_lock;
 
+static struct string_list pack_garbage = STRING_LIST_INIT_DUP;
+
+static void clean_pack_garbage(void)
+{
+       int i;
+       for (i = 0; i < pack_garbage.nr; i++)
+               unlink_or_warn(pack_garbage.items[i].string);
+       string_list_clear(&pack_garbage, 0);
+}
+
+static void report_pack_garbage(unsigned seen_bits, const char *path)
+{
+       if (seen_bits == PACKDIR_FILE_IDX)
+               string_list_append(&pack_garbage, path);
+}
+
 static void git_config_date_string(const char *key, const char **output)
 {
        if (git_config_get_string_const(key, output))
@@ -217,7 +233,7 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
                return NULL;
 
        if (gethostname(my_host, sizeof(my_host)))
-               strcpy(my_host, "unknown");
+               xsnprintf(my_host, sizeof(my_host), "unknown");
 
        pidfile_path = git_pathdup("gc.pid");
        fd = hold_lock_file_for_update(&lock, pidfile_path,
@@ -416,6 +432,11 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
        if (run_command_v_opt(rerere.argv, RUN_GIT_CMD))
                return error(FAILED_RUN, rerere.argv[0]);
 
+       report_garbage = report_pack_garbage;
+       reprepare_packed_git();
+       if (pack_garbage.nr > 0)
+               clean_pack_garbage();
+
        if (auto_gc && too_many_loose_objects())
                warning(_("There are too many unreachable loose objects; "
                        "run 'git prune' to remove them."));