Function collect_changed_submodules

submodule.c:891–929

* Collect the paths of submodules in 'changed' which have changed based on * the revisions as specified in 'argv'. Each entry in 'changed' will also * have a corresponding 'struct oid_array' (in the 'util' field) which lists * what the submodule pointers were updated to during the change. */

 * what the submodule pointers were updated to during the change.
 */
static void collect_changed_submodules(struct repository *r,
				       struct string_list *changed,
				       struct strvec *argv)
{
	struct rev_info rev;
	const struct commit *commit;
	int save_warning;
	struct setup_revision_opt s_r_opt = {
		.assume_dashdash = 1,
	};
	struct repo_config_values *cfg = repo_config_values(the_repository);

	save_warning = cfg->warn_on_object_refname_ambiguity;
	cfg->warn_on_object_refname_ambiguity = 0;
	repo_init_revisions(r, &rev, NULL);
	setup_revisions_from_strvec(argv, &rev, &s_r_opt);
	cfg->warn_on_object_refname_ambiguity = save_warning;
	if (prepare_revision_walk(&rev))
		die(_("revision walk setup failed"));

	while ((commit = get_revision(&rev))) {
		struct rev_info diff_rev;
		struct collect_changed_submodules_cb_data data;
		data.repo = r;
		data.changed = changed;
		data.commit_oid = &commit->object.oid;

		repo_init_revisions(r, &diff_rev, NULL);
		diff_rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
		diff_rev.diffopt.format_callback = collect_changed_submodules_cb;
		diff_rev.diffopt.format_callback_data = &data;
		diff_rev.dense_combined_merges = 1;
		diff_tree_combined_merge(commit, &diff_rev);
		release_revisions(&diff_rev);
	}

	reset_revision_walk();
	release_revisions(&rev);
}

static void free_submodules_data(struct string_list *submodules)
{