[PATCH] builtin/push.c: add push.pushOption config

[Marius Paliga <marius.paliga@gmail.com>]

Push options need to be given explicitly, via the command line as "git
push --push-option <option>".  Add the config option push.pushOption,
which is a multi-valued option, containing push options that are sent
by default.

When push options are set in the lower-priority configulation file
(e.g. /etc/gitconfig, or $HOME/.gitconfig), they can be unset later in
the more specific repository config by the empty string.

Add tests and update documentation as well.

Signed-off-by: Marius Paliga <marius.paliga@gmail.com>
---
 Documentation/git-push.txt |  3 ++
 builtin/push.c             | 26 +++++++++++++---
 t/t5545-push-options.sh    | 77 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 101 insertions(+), 5 deletions(-)

diff --git a/Documentation/git-push.txt b/Documentation/git-push.txt
index 3e76e99f3..aa78057dc 100644
--- a/Documentation/git-push.txt
+++ b/Documentation/git-push.txt
@@ -161,6 +161,9 @@ already exists on the remote side.
 	Transmit the given string to the server, which passes them to
 	the pre-receive as well as the post-receive hook. The given string
 	must not contain a NUL or LF character.
+	When no `--push-option <option>` is given from the command
+	line, the values of configuration variable `push.pushOption`
+	are used instead.
 
 --receive-pack=<git-receive-pack>::
 --exec=<git-receive-pack>::
diff --git a/builtin/push.c b/builtin/push.c
index 2ac810422..1c28427d8 100644
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -32,6 +32,8 @@ static const char **refspec;
 static int refspec_nr;
 static int refspec_alloc;
 
+static struct string_list push_options_config = STRING_LIST_INIT_DUP;
+
 static void add_refspec(const char *ref)
 {
 	refspec_nr++;
@@ -503,6 +505,15 @@ static int git_push_config(const char *k, const char *v, void *cb)
 		int val = git_config_bool(k, v) ?
 			RECURSE_SUBMODULES_ON_DEMAND : RECURSE_SUBMODULES_OFF;
 		recurse_submodules = val;
+	} else if (!strcmp(k, "push.pushoption")) {
+		if (!v)
+			return config_error_nonbool(k);
+		else
+			if (!*v)
+				string_list_clear(&push_options_config, 0);
+			else
+				string_list_append(&push_options_config, v);
+		return 0;
 	}
 
 	return git_default_config(k, v, NULL);
@@ -515,7 +526,8 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 	int push_cert = -1;
 	int rc;
 	const char *repo = NULL;	/* default repository */
-	struct string_list push_options = STRING_LIST_INIT_DUP;
+	struct string_list push_options_cmdline = STRING_LIST_INIT_DUP;
+	struct string_list *push_options;
 	const struct string_list_item *item;
 
 	struct option options[] = {
@@ -551,7 +563,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		  0, "signed", &push_cert, "yes|no|if-asked", N_("GPG sign the push"),
 		  PARSE_OPT_OPTARG, option_parse_push_signed },
 		OPT_BIT(0, "atomic", &flags, N_("request atomic transaction on remote side"), TRANSPORT_PUSH_ATOMIC),
-		OPT_STRING_LIST('o', "push-option", &push_options, N_("server-specific"), N_("option to transmit")),
+		OPT_STRING_LIST('o', "push-option", &push_options_cmdline, N_("server-specific"), N_("option to transmit")),
 		OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 				TRANSPORT_FAMILY_IPV4),
 		OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
@@ -562,6 +574,9 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 	packet_trace_identity("push");
 	git_config(git_push_config, &flags);
 	argc = parse_options(argc, argv, prefix, options, push_usage, 0);
+	push_options = (push_options_cmdline.nr
+		? &push_options_cmdline
+		: &push_options_config);
 	set_push_cert_flags(&flags, push_cert);
 
 	if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
@@ -584,12 +599,13 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		set_refspecs(argv + 1, argc - 1, repo);
 	}
 
-	for_each_string_list_item(item, &push_options)
+	for_each_string_list_item(item, push_options)
 		if (strchr(item->string, '\n'))
 			die(_("push options must not have new line characters"));
 
-	rc = do_push(repo, flags, &push_options);
-	string_list_clear(&push_options, 0);
+	rc = do_push(repo, flags, push_options);
+	string_list_clear(&push_options_cmdline, 0);
+	string_list_clear(&push_options_config, 0);
 	if (rc == -1)
 		usage_with_options(push_usage, options);
 	else
diff --git a/t/t5545-push-options.sh b/t/t5545-push-options.sh
index 90a4b0d2f..463783789 100755
--- a/t/t5545-push-options.sh
+++ b/t/t5545-push-options.sh
@@ -140,6 +140,83 @@ test_expect_success 'push options and submodules' '
 	test_cmp expect parent_upstream/.git/hooks/post-receive.push_options
 '
 
+test_expect_success 'default push option' '
+	mk_repo_pair &&
+	git -C upstream config receive.advertisePushOptions true &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git push --mirror up &&
+		test_commit two &&
+		git -c push.pushOption=default push up master
+	) &&
+	test_refs master master &&
+	echo "default" >expect &&
+	test_cmp expect upstream/.git/hooks/pre-receive.push_options &&
+	test_cmp expect upstream/.git/hooks/post-receive.push_options
+'
+
+test_expect_success 'two default push options' '
+	mk_repo_pair &&
+	git -C upstream config receive.advertisePushOptions true &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git push --mirror up &&
+		test_commit two &&
+		git -c push.pushOption=default1 -c push.pushOption=default2 push up master
+	) &&
+	test_refs master master &&
+	printf "default1\ndefault2\n" >expect &&
+	test_cmp expect upstream/.git/hooks/pre-receive.push_options &&
+	test_cmp expect upstream/.git/hooks/post-receive.push_options
+'
+
+test_expect_success 'push option from command line overrides from-config push option' '
+	mk_repo_pair &&
+	git -C upstream config receive.advertisePushOptions true &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git push --mirror up &&
+		test_commit two &&
+		git -c push.pushOption=default push --push-option=manual up master
+	) &&
+	test_refs master master &&
+	echo "manual" >expect &&
+	test_cmp expect upstream/.git/hooks/pre-receive.push_options &&
+	test_cmp expect upstream/.git/hooks/post-receive.push_options
+'
+
+test_expect_success 'empty value of push.pushOption in config clears the list' '
+	mk_repo_pair &&
+	git -C upstream config receive.advertisePushOptions true &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git push --mirror up &&
+		test_commit two &&
+		git -c push.pushOption=default1 -c push.pushOption= -c push.pushOption=default2 push up master
+	) &&
+	test_refs master master &&
+	echo "default2" >expect &&
+	test_cmp expect upstream/.git/hooks/pre-receive.push_options &&
+	test_cmp expect upstream/.git/hooks/post-receive.push_options
+'
+
+test_expect_success 'invalid push option in config' '
+	mk_repo_pair &&
+	git -C upstream config receive.advertisePushOptions true &&
+	(
+		cd workbench &&
+		test_commit one &&
+		git push --mirror up &&
+		test_commit two &&
+		test_must_fail git -c push.pushOption push up master
+	) &&
+	test_refs master HEAD@{1}
+'
+
 . "$TEST_DIRECTORY"/lib-httpd.sh
 start_httpd
 
-- 
2.14.1