submodule init: initialize active submodules

diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 0a27bab11b6b5a1b162c4dfef34c645c7d5f14ad..f4b87c6c9f901e5834ce9e50db089fb487c6eafc 100644 (file)
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -787,13 +787,15 @@ static void sha1_object(const void *data, struct object_entry *obj_entry,
                        const unsigned char *sha1)
 {
        void *new_data = NULL;
-       int collision_test_needed;
+       int collision_test_needed = 0;
 
        assert(data || obj_entry);
 
-       read_lock();
-       collision_test_needed = has_sha1_file_with_flags(sha1, HAS_SHA1_QUICK);
-       read_unlock();
+       if (startup_info->have_repository) {
+               read_lock();
+               collision_test_needed = has_sha1_file_with_flags(sha1, HAS_SHA1_QUICK);
+               read_unlock();
+       }
 
        if (collision_test_needed && !data) {
                read_lock();
@@ -1730,6 +1732,8 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
                usage(index_pack_usage);
        if (fix_thin_pack && !from_stdin)
                die(_("--fix-thin cannot be used without --stdin"));
+       if (from_stdin && !startup_info->have_repository)
+               die(_("--stdin requires a git repository"));
        if (!index_name && pack_name)
                index_name = derive_filename(pack_name, ".idx", &index_name_buf);
        if (keep_msg && !keep_name && pack_name)