revisions API users: add "goto cleanup" for release_revisions()

Add a release_revisions() to various users of "struct rev_info" which
requires a minor refactoring to a "goto cleanup" pattern to use that
function.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/diff-files.c

@@ -77,8 +77,12 @@ int cmd_diff_files(int argc, const char **argv, const char *prefix)
 
 	if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
 		perror("read_cache_preload");
-		return -1;
+		result = -1;
+		goto cleanup;
 	}
+cleanup:
 	result = run_diff_files(&rev, options);
-	return diff_result_code(&rev.diffopt, result);
+	result = diff_result_code(&rev.diffopt, result);
+	release_revisions(&rev);
+	return result;
 }

builtin/rev-list.c

@@ -500,6 +500,7 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 	int use_bitmap_index = 0;
 	int filter_provided_objects = 0;
 	const char *show_progress = NULL;
+	int ret = 0;
 
 	if (argc == 2 && !strcmp(argv[1], "-h"))
 		usage(rev_list_usage);
@@ -583,7 +584,7 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 		}
 		if (!strcmp(arg, "--test-bitmap")) {
 			test_bitmap_walk(&revs);
-			return 0;
+			goto cleanup;
 		}
 		if (skip_prefix(arg, "--progress=", &arg)) {
 			show_progress = arg;
@@ -672,11 +673,11 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 
 	if (use_bitmap_index) {
 		if (!try_bitmap_count(&revs, filter_provided_objects))
-			return 0;
+			goto cleanup;
 		if (!try_bitmap_disk_usage(&revs, filter_provided_objects))
-			return 0;
+			goto cleanup;
 		if (!try_bitmap_traversal(&revs, filter_provided_objects))
-			return 0;
+			goto cleanup;
 	}
 
 	if (prepare_revision_walk(&revs))
@@ -696,8 +697,10 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 
 		find_bisection(&revs.commits, &reaches, &all, bisect_flags);
 
-		if (bisect_show_vars)
-			return show_bisect_vars(&info, reaches, all);
+		if (bisect_show_vars) {
+			ret = show_bisect_vars(&info, reaches, all);
+			goto cleanup;
+		}
 	}
 
 	if (filter_provided_objects) {
@@ -752,5 +755,7 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 	if (show_disk_usage)
 		printf("%"PRIuMAX"\n", (uintmax_t)total_disk_usage);
 
-	return 0;
+cleanup:
+	release_revisions(&revs);
+	return ret;
 }

builtin/stash.c

@@ -917,6 +917,7 @@ static int show_stash(int argc, const char **argv, const char *prefix)
 cleanup:
 	strvec_clear(&stash_args);
 	free_stash_info(&info);
+	release_revisions(&rev);
 	if (do_usage)
 		usage_with_options(git_stash_show_usage, options);
 	return ret;

builtin/submodule--helper.c

@@ -1232,6 +1232,7 @@ static int compute_summary_module_list(struct object_id *head_oid,
 	struct strvec diff_args = STRVEC_INIT;
 	struct rev_info rev;
 	struct module_cb_list list = MODULE_CB_LIST_INIT;
+	int ret = 0;
 
 	strvec_push(&diff_args, get_diff_cmd(diff_cmd));
 	if (info->cached)
@@ -1257,11 +1258,13 @@ static int compute_summary_module_list(struct object_id *head_oid,
 			setup_work_tree();
 		if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
 			perror("read_cache_preload");
-			return -1;
+			ret = -1;
+			goto cleanup;
 		}
 	} else if (read_cache() < 0) {
 		perror("read_cache");
-		return -1;
+		ret = -1;
+		goto cleanup;
 	}
 
 	if (diff_cmd == DIFF_INDEX)
@@ -1269,9 +1272,10 @@ static int compute_summary_module_list(struct object_id *head_oid,
 	else
 		run_diff_files(&rev, 0);
 	prepare_submodule_summary(info, &list);
+cleanup:
 	strvec_clear(&diff_args);
 	release_revisions(&rev);
-	return 0;
+	return ret;
 }
 
 static int module_summary(int argc, const char **argv, const char *prefix)

sequencer.c

@@ -5354,6 +5354,7 @@ int sequencer_make_script(struct repository *r, struct strbuf *out, int argc,
 	int rebase_merges = flags & TODO_LIST_REBASE_MERGES;
 	int reapply_cherry_picks = flags & TODO_LIST_REAPPLY_CHERRY_PICKS;
 	int skipped_commit = 0;
+	int ret = 0;
 
 	repo_init_revisions(r, &revs, NULL);
 	revs.verbose_header = 1;
@@ -5377,14 +5378,20 @@ int sequencer_make_script(struct repository *r, struct strbuf *out, int argc,
 	pp.fmt = revs.commit_format;
 	pp.output_encoding = get_log_output_encoding();
 
-	if (setup_revisions(argc, argv, &revs, NULL) > 1)
-		return error(_("make_script: unhandled options"));
+	if (setup_revisions(argc, argv, &revs, NULL) > 1) {
+		ret = error(_("make_script: unhandled options"));
+		goto cleanup;
+	}
 
-	if (prepare_revision_walk(&revs) < 0)
-		return error(_("make_script: error preparing revisions"));
+	if (prepare_revision_walk(&revs) < 0) {
+		ret = error(_("make_script: error preparing revisions"));
+		goto cleanup;
+	}
 
-	if (rebase_merges)
-		return make_script_with_merges(&pp, &revs, out, flags);
+	if (rebase_merges) {
+		ret = make_script_with_merges(&pp, &revs, out, flags);
+		goto cleanup;
+	}
 
 	while ((commit = get_revision(&revs))) {
 		int is_empty = is_original_commit_empty(commit);
@@ -5408,7 +5415,9 @@ int sequencer_make_script(struct repository *r, struct strbuf *out, int argc,
 	if (skipped_commit)
 		advise_if_enabled(ADVICE_SKIPPED_CHERRY_PICKS,
 				  _("use --reapply-cherry-picks to include skipped commits"));
-	return 0;
+cleanup:
+	release_revisions(&revs);
+	return ret;
 }
 
 /*

t/helper/test-fast-rebase.c

@@ -99,6 +99,7 @@ int cmd__fast_rebase(int argc, const char **argv)
 	struct merge_result result;
 	struct strbuf reflog_msg = STRBUF_INIT;
 	struct strbuf branch_name = STRBUF_INIT;
+	int ret = 0;
 
 	/*
 	 * test-tool stuff doesn't set up the git directory by default; need to
@@ -137,13 +138,17 @@ int cmd__fast_rebase(int argc, const char **argv)
 	revs.topo_order = 1;
 	strvec_pushl(&rev_walk_args, "", argv[4], "--not", argv[3], NULL);
 
-	if (setup_revisions(rev_walk_args.nr, rev_walk_args.v, &revs, NULL) > 1)
-		return error(_("unhandled options"));
+	if (setup_revisions(rev_walk_args.nr, rev_walk_args.v, &revs, NULL) > 1) {
+		ret = error(_("unhandled options"));
+		goto cleanup;
+	}
 
 	strvec_clear(&rev_walk_args);
 
-	if (prepare_revision_walk(&revs) < 0)
-		return error(_("error preparing revisions"));
+	if (prepare_revision_walk(&revs) < 0) {
+		ret = error(_("error preparing revisions"));
+		goto cleanup;
+	}
 
 	init_merge_options(&merge_opt, the_repository);
 	memset(&result, 0, sizeof(result));
@@ -220,7 +225,10 @@ int cmd__fast_rebase(int argc, const char **argv)
 			       COMMIT_LOCK | SKIP_IF_UNCHANGED))
 		die(_("unable to write %s"), get_index_file());
 
+	ret = (result.clean == 0);
+cleanup:
 	strbuf_release(&reflog_msg);
 	strbuf_release(&branch_name);
-	return (result.clean == 0);
+	release_revisions(&revs);
+	return ret;
 }