for-each-repo: error on bad --config

avar · gitster · commit f7b2ff951632 · 2023-03-28T07:37:53.000-07:00
As noted in 6c62f01 (for-each-repo: do nothing on empty config, 2021-01-08) this command wants to ignore a non-existing config key, but let's not conflate that with bad config. Before this, all these added tests would pass with an exit code of 0. We could preserve the comment added in 6c62f01, but now that we're directly using the documented repo_config_get_value_multi() value it's just narrating something that should be obvious from the API use, so let's drop it. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/for-each-repo.c b/builtin/for-each-repo.c
@@ -32,6 +32,7 @@ int cmd_for_each_repo(int argc, const char **argv, const char *prefix)
 	static const char *config_key = NULL;
 	int i, result = 0;
 	const struct string_list *values;
+	int err;
 
 	const struct option options[] = {
 		OPT_STRING(0, "config", &config_key, N_("config"),
@@ -45,11 +46,11 @@ int cmd_for_each_repo(int argc, const char **argv, const char *prefix)
 	if (!config_key)
 		die(_("missing --config=<config>"));
 
-	/*
-	 * Do nothing on an empty list, which is equivalent to the case
-	 * where the config variable does not exist at all.
-	 */
-	if (repo_config_get_value_multi(the_repository, config_key, &values))
+	err = repo_config_get_value_multi(the_repository, config_key, &values);
+	if (err < 0)
+		usage_msg_optf(_("got bad config --config=%s"),
+			       for_each_repo_usage, options, config_key);
+	else if (err)
 		return 0;
 
 	for (i = 0; !result && i < values->nr; i++)
diff --git a/t/t0068-for-each-repo.sh b/t/t0068-for-each-repo.sh
@@ -39,4 +39,10 @@ test_expect_success 'do nothing on empty config' '
 	git for-each-repo --config=bogus.config -- help --no-such-option
 '
 
+test_expect_success 'error on bad config keys' '
+	test_expect_code 129 git for-each-repo --config=a &&
+	test_expect_code 129 git for-each-repo --config=a.b. &&
+	test_expect_code 129 git for-each-repo --config="'\''.b"
+'
+
 test_done
