From: Jacob Keller Date: Mon, 23 Jun 2025 23:11:35 +0000 (-0700) Subject: submodule: look up remotes by URL first X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ca62f524c1eaef606b5c312de53ef7c4d9eefa4f;p=thirdparty%2Fgit.git submodule: look up remotes by URL first The get_default_remote_submodule() function performs a lookup to find the appropriate remote to use within a submodule. The function first checks to see if it can find the remote for the current branch. If this fails, it then checks to see if there is exactly one remote. It will use this, before finally falling back to "origin" as the default. If a user happens to rename their default remote from origin, either manually or by setting something like clone.defaultRemoteName, this fallback will not work. In such cases, the submodule logic will try to use a non-existent remote. This usually manifests as a failure to trigger the submodule update. The parent project already knows and stores the submodule URL in either .gitmodules or its .git/config. Add a new repo_remote_from_url() helper which will iterate over all the remotes in a repository and return the first remote which has a matching URL. Refactor get_default_remote_submodule to find the submodule and get its URL. If a valid URL exists, first try to obtain a remote using the new repo_remote_from_url(). Fall back to the repo_default_remote() otherwise. The fallback logic is kept in case for some reason the user has manually changed the URL within the submodule. Additionally, we still try to use a remote rather than directly passing the URL in the fetch_in_submodule() logic. This ensures that an update will properly update the remote refs within the submodule as expected, rather than just fetching into FETCH_HEAD. Signed-off-by: Jacob Keller Signed-off-by: Junio C Hamano --- diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c index 1aa87435c2..84a96d300d 100644 --- a/builtin/submodule--helper.c +++ b/builtin/submodule--helper.c @@ -72,16 +72,40 @@ static char *resolve_relative_url(const char *rel_url, const char *up_path, int static int get_default_remote_submodule(const char *module_path, char **default_remote) { + const struct submodule *sub; struct repository subrepo; + const char *remote_name = NULL; + char *url = NULL; + + sub = submodule_from_path(the_repository, null_oid(the_hash_algo), module_path); + if (sub && sub->url) { + url = xstrdup(sub->url); + + /* Possibly a url relative to parent */ + if (starts_with_dot_dot_slash(url) || + starts_with_dot_slash(url)) { + char *oldurl = url; + + url = resolve_relative_url(oldurl, NULL, 1); + free(oldurl); + } + } if (repo_submodule_init(&subrepo, the_repository, module_path, null_oid(the_hash_algo)) < 0) return die_message(_("could not get a repository handle for submodule '%s'"), module_path); - *default_remote = xstrdup(repo_default_remote(&subrepo)); + /* Look up by URL first */ + if (url) + remote_name = repo_remote_from_url(&subrepo, url); + if (!remote_name) + remote_name = repo_default_remote(&subrepo); + + *default_remote = xstrdup(remote_name); repo_clear(&subrepo); + free(url); return 0; } diff --git a/remote.c b/remote.c index e35cf7ec61..60b4aec3de 100644 --- a/remote.c +++ b/remote.c @@ -1801,6 +1801,21 @@ const char *repo_default_remote(struct repository *repo) return remotes_remote_for_branch(repo->remote_state, branch, NULL); } +const char *repo_remote_from_url(struct repository *repo, const char *url) +{ + read_config(repo, 0); + + for (int i = 0; i < repo->remote_state->remotes_nr; i++) { + struct remote *remote = repo->remote_state->remotes[i]; + if (!remote) + continue; + + if (remote_has_url(remote, url)) + return remote->name; + } + return NULL; +} + int branch_has_merge_config(struct branch *branch) { return branch && branch->set_merge; diff --git a/remote.h b/remote.h index 8dc5cfa49e..0ca399e183 100644 --- a/remote.h +++ b/remote.h @@ -340,6 +340,7 @@ const char *pushremote_for_branch(struct branch *branch, int *explicit); char *remote_ref_for_branch(struct branch *branch, int for_push); const char *repo_default_remote(struct repository *repo); +const char *repo_remote_from_url(struct repository *repo, const char *url); /* returns true if the given branch has merge configuration given. */ int branch_has_merge_config(struct branch *branch); diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh index 748b529745..c09047b5f4 100755 --- a/t/t7406-submodule-update.sh +++ b/t/t7406-submodule-update.sh @@ -1134,6 +1134,38 @@ test_expect_success 'setup clean recursive superproject' ' git clone --recurse-submodules top top-clean ' +test_expect_success 'submodule update with multiple remotes' ' + test_when_finished "rm -fr top-cloned" && + cp -r top-clean top-cloned && + + # Create a commit in each repo, starting with bottom + test_commit -C bottom multiple_remote_commit && + # Create middle commit + git -C middle/bottom fetch && + git -C middle/bottom checkout -f FETCH_HEAD && + git -C middle add bottom && + git -C middle commit -m "multiple_remote_commit" && + # Create top commit + git -C top/middle fetch && + git -C top/middle checkout -f FETCH_HEAD && + git -C top add middle && + git -C top commit -m "multiple_remote_commit" && + + # rename the submodule remote + git -C top-cloned/middle remote rename origin upstream && + + # Add another remote + git -C top-cloned/middle remote add other bogus && + + # Make the update of "middle" a no-op, otherwise we error out + # because of its unmerged state + test_config -C top-cloned submodule.middle.update !true && + git -C top-cloned submodule update --recursive 2>actual.err && + cat >expect.err <<-\EOF && + EOF + test_cmp expect.err actual.err +' + test_expect_success 'submodule update with renamed remote' ' test_when_finished "rm -fr top-cloned" && cp -r top-clean top-cloned &&