fetch: skip on-demand checking when no submodules are configured

It makes no sense to do the - possibly very expensive - call to "rev-list
<new-ref-sha1> --not --all" in check_for_new_submodule_commits() when
there aren't any submodules configured.

Leave check_for_new_submodule_commits() early when no name <-> path
mappings for submodules are found in the configuration. To make that work
reading the configuration had to be moved further up in cmd_fetch(), as
doing that after the actual fetch of the superproject was too late.

Reported-by: Martin Fick <mfick@codeaurora.org>
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/fetch.c b/builtin/fetch.c
index 93c99385a95e6ab525fa64c1dbb70d5d4ca103ba..e422ced9299521bb2e7f3c5ff59a434c8403a4ea 100644 (file)
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -941,6 +941,15 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
        argc = parse_options(argc, argv, prefix,
                             builtin_fetch_options, builtin_fetch_usage, 0);
 
+       if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
+               if (recurse_submodules_default) {
+                       int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
+                       set_config_fetch_recurse_submodules(arg);
+               }
+               gitmodules_config();
+               git_config(submodule_config, NULL);
+       }
+
        if (all) {
                if (argc == 1)
                        die(_("fetch --all does not take a repository argument"));
@@ -976,12 +985,6 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
        if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
                const char *options[10];
                int num_options = 0;
-               if (recurse_submodules_default) {
-                       int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
-                       set_config_fetch_recurse_submodules(arg);
-               }
-               gitmodules_config();
-               git_config(submodule_config, NULL);
                add_options_to_argv(&num_options, options);
                result = fetch_populated_submodules(num_options, options,
                                                    submodule_prefix,

diff --git a/submodule.c b/submodule.c
index b6dec70bd1a6b35c8ecc6a1a9953d64bfe6c4510..e0d5dcfedd2b9b7381ea5f26fbe779994e2fc3f9 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -373,6 +373,10 @@ void check_for_new_submodule_commits(unsigned char new_sha1[20])
        const char *argv[] = {NULL, NULL, "--not", "--all", NULL};
        int argc = ARRAY_SIZE(argv) - 1;
 
+       /* No need to check if there are no submodules configured */
+       if (!config_name_for_path.nr)
+               return;
+
        init_revisions(&rev, NULL);
        argv[1] = xstrdup(sha1_to_hex(new_sha1));
        setup_revisions(argc, argv, &rev, NULL);