Merge branch 'rp/maintenance-qol'

'git maintenance register' is taught to write configuration to an
arbitrary path, and 'git for-each-repo' is taught to expand tilde
characters in paths.

* rp/maintenance-qol:
  builtin/gc.c: fix use-after-free in maintenance_unregister()
  maintenance --unregister: fix uninit'd data use & -Wdeclaration-after-statement
  maintenance: add option to register in a specific config
  for-each-repo: interpolate repo path arguments

Author: gitster

Documentation/git-maintenance.txt

@@ -50,13 +50,13 @@ stop::
 	the background maintenance is restarted later.
 
 register::
-	Initialize Git config values so any scheduled maintenance will
-	start running on this repository. This adds the repository to the
-	`maintenance.repo` config variable in the current user's global
-	config and enables some recommended configuration values for
-	`maintenance.<task>.schedule`. The tasks that are enabled are safe
-	for running in the background without disrupting foreground
-	processes.
+	Initialize Git config values so any scheduled maintenance will start
+	running on this repository. This adds the repository to the
+	`maintenance.repo` config variable in the current user's global config,
+	or the config specified by --config-file option, and enables some
+	recommended configuration values for `maintenance.<task>.schedule`. The
+	tasks that are enabled are safe for running in the background without
+	disrupting foreground processes.
 +
 The `register` subcommand will also set the `maintenance.strategy` config
 value to `incremental`, if this value is not previously set. The

builtin/for-each-repo.c

@@ -14,13 +14,16 @@ static int run_command_on_repo(const char *path, int argc, const char ** argv)
 {
 	int i;
 	struct child_process child = CHILD_PROCESS_INIT;
+	char *abspath = interpolate_path(path, 0);
 
 	child.git_cmd = 1;
-	strvec_pushl(&child.args, "-C", path, NULL);
+	strvec_pushl(&child.args, "-C", abspath, NULL);
 
 	for (i = 0; i < argc; i++)
 		strvec_push(&child.args, argv[i]);
 
+	free(abspath);
+
 	return run_command(&child);
 }
 

builtin/gc.c

@@ -1480,13 +1480,15 @@ static char *get_maintpath(void)
 }
 
 static char const * const builtin_maintenance_register_usage[] = {
-	"git maintenance register",
+	"git maintenance register [--config-file <path>]",
 	NULL
 };
 
 static int maintenance_register(int argc, const char **argv, const char *prefix)
 {
+	char *config_file = NULL;
 	struct option options[] = {
+		OPT_STRING(0, "config-file", &config_file, N_("file"), N_("use given config file")),
 		OPT_END(),
 	};
 	int found = 0;
@@ -1523,12 +1525,16 @@ static int maintenance_register(int argc, const char **argv, const char *prefix)
 
 	if (!found) {
 		int rc;
-		char *user_config, *xdg_config;
-		git_global_config(&user_config, &xdg_config);
-		if (!user_config)
-			die(_("$HOME not set"));
+		char *user_config = NULL, *xdg_config = NULL;
+
+		if (!config_file) {
+			git_global_config(&user_config, &xdg_config);
+			config_file = user_config;
+			if (!user_config)
+				die(_("$HOME not set"));
+		}
 		rc = git_config_set_multivar_in_file_gently(
-			user_config, "maintenance.repo", maintpath,
+			config_file, "maintenance.repo", maintpath,
 			CONFIG_REGEX_NONE, 0);
 		free(user_config);
 		free(xdg_config);
@@ -1543,14 +1549,16 @@ static int maintenance_register(int argc, const char **argv, const char *prefix)
 }
 
 static char const * const builtin_maintenance_unregister_usage[] = {
-	"git maintenance unregister [--force]",
+	"git maintenance unregister [--config-file <path>] [--force]",
 	NULL
 };
 
 static int maintenance_unregister(int argc, const char **argv, const char *prefix)
 {
 	int force = 0;
+	char *config_file = NULL;
 	struct option options[] = {
+		OPT_STRING(0, "config-file", &config_file, N_("file"), N_("use given config file")),
 		OPT__FORCE(&force,
 			   N_("return success even if repository was not registered"),
 			   PARSE_OPT_NOCOMPLETE),
@@ -1561,14 +1569,21 @@ static int maintenance_unregister(int argc, const char **argv, const char *prefi
 	int found = 0;
 	struct string_list_item *item;
 	const struct string_list *list;
+	struct config_set cs = { { 0 } };
 
 	argc = parse_options(argc, argv, prefix, options,
 			     builtin_maintenance_unregister_usage, 0);
 	if (argc)
 		usage_with_options(builtin_maintenance_unregister_usage,
 				   options);
 
-	list = git_config_get_value_multi(key);
+	if (config_file) {
+		git_configset_init(&cs);
+		git_configset_add_file(&cs, config_file);
+		list = git_configset_get_value_multi(&cs, key);
+	} else {
+		list = git_config_get_value_multi(key);
+	}
 	if (list) {
 		for_each_string_list_item(item, list) {
 			if (!strcmp(maintpath, item->string)) {
@@ -1580,12 +1595,15 @@ static int maintenance_unregister(int argc, const char **argv, const char *prefi
 
 	if (found) {
 		int rc;
-		char *user_config, *xdg_config;
-		git_global_config(&user_config, &xdg_config);
-		if (!user_config)
-			die(_("$HOME not set"));
+		char *user_config = NULL, *xdg_config = NULL;
+		if (!config_file) {
+			git_global_config(&user_config, &xdg_config);
+			config_file = user_config;
+			if (!user_config)
+				die(_("$HOME not set"));
+		}
 		rc = git_config_set_multivar_in_file_gently(
-			user_config, key, NULL, maintpath,
+			config_file, key, NULL, maintpath,
 			CONFIG_FLAGS_MULTI_REPLACE | CONFIG_FLAGS_FIXED_VALUE);
 		free(user_config);
 		free(xdg_config);
@@ -1598,6 +1616,7 @@ static int maintenance_unregister(int argc, const char **argv, const char *prefi
 		die(_("repository '%s' is not registered"), maintpath);
 	}
 
+	git_configset_clear(&cs);
 	free(maintpath);
 	return 0;
 }

t/t0068-for-each-repo.sh

@@ -8,22 +8,28 @@ test_expect_success 'run based on configured value' '
 	git init one &&
 	git init two &&
 	git init three &&
+	git init ~/four &&
 	git -C two commit --allow-empty -m "DID NOT RUN" &&
 	git config run.key "$TRASH_DIRECTORY/one" &&
 	git config --add run.key "$TRASH_DIRECTORY/three" &&
+	git config --add run.key "~/four" &&
 	git for-each-repo --config=run.key commit --allow-empty -m "ran" &&
 	git -C one log -1 --pretty=format:%s >message &&
 	grep ran message &&
 	git -C two log -1 --pretty=format:%s >message &&
 	! grep ran message &&
 	git -C three log -1 --pretty=format:%s >message &&
 	grep ran message &&
+	git -C ~/four log -1 --pretty=format:%s >message &&
+	grep ran message &&
 	git for-each-repo --config=run.key -- commit --allow-empty -m "ran again" &&
 	git -C one log -1 --pretty=format:%s >message &&
 	grep again message &&
 	git -C two log -1 --pretty=format:%s >message &&
 	! grep again message &&
 	git -C three log -1 --pretty=format:%s >message &&
+	grep again message &&
+	git -C ~/four log -1 --pretty=format:%s >message &&
 	grep again message
 '
 

t/t7900-maintenance.sh

@@ -500,9 +500,28 @@ test_expect_success 'register and unregister' '
 	git config --global --get-all maintenance.repo >actual &&
 	test_cmp before actual &&
 
+	git config --file ./other --add maintenance.repo /existing1 &&
+	git config --file ./other --add maintenance.repo /existing2 &&
+	git config --file ./other --get-all maintenance.repo >before &&
+
+	git maintenance register --config-file ./other &&
+	test_cmp_config false maintenance.auto &&
+	git config --file ./other --get-all maintenance.repo >between &&
+	cp before expect &&
+	pwd >>expect &&
+	test_cmp expect between &&
+
+	git maintenance unregister --config-file ./other &&
+	git config --file ./other --get-all maintenance.repo >actual &&
+	test_cmp before actual &&
+
 	test_must_fail git maintenance unregister 2>err &&
 	grep "is not registered" err &&
-	git maintenance unregister --force
+	git maintenance unregister --force &&
+
+	test_must_fail git maintenance unregister --config-file ./other 2>err &&
+	grep "is not registered" err &&
+	git maintenance unregister --config-file ./other --force
 '
 
 test_expect_success !MINGW 'register and unregister with regex metacharacters' '