Merge branch 'xx/remote-server-option-config'

A new configuration variable remote.<name>.serverOption makes the
transport layer act as if the --serverOption=<value> option is
given from the command line.

* xx/remote-server-option-config:
  ls-remote: leakfix for not clearing server_options
  fetch: respect --server-option when fetching multiple remotes
  transport.c:🤝 make use of server options from remote
  remote: introduce remote.<name>.serverOption configuration
  transport: introduce parse_transport_option() method

Documentation/config/remote.txt

@@ -96,3 +96,13 @@ remote.<name>.partialclonefilter::
 	Changing or clearing this value will only affect fetches for new commits.
 	To fetch associated objects for commits already present in the local object
 	database, use the `--refetch` option of linkgit:git-fetch[1].
+
+remote.<name>.serverOption::
+	The default set of server options used when fetching from this remote.
+	These server options can be overridden by the `--server-option=` command
+	line arguments.
++
+This is a multi-valued variable, and an empty value can be used in a higher
+priority configuration file (e.g. `.git/config` in a repository) to clear
+the values inherited from a lower priority configuration files (e.g.
+`$HOME/.gitconfig`).

Documentation/fetch-options.txt

@@ -305,6 +305,9 @@ endif::git-pull[]
 	unknown ones, is server-specific.
 	When multiple `--server-option=<option>` are given, they are all
 	sent to the other side in the order listed on the command line.
+	When no `--server-option=<option>` is given from the command line,
+	the values of configuration variable `remote.<name>.serverOption`
+	are used instead.
 
 --show-forced-updates::
 	By default, git checks if a branch is force-updated during

Documentation/git-clone.txt

@@ -149,6 +149,9 @@ objects from the source repository into a pack in the cloned repository.
 	unknown ones, is server-specific.
 	When multiple `--server-option=<option>` are given, they are all
 	sent to the other side in the order listed on the command line.
+	When no ++--server-option=++__<option>__ is given from the command
+	line, the values of configuration variable `remote.<name>.serverOption`
+	are used instead.
 
 `-n`::
 `--no-checkout`::

Documentation/git-ls-remote.txt

@@ -81,6 +81,9 @@ OPTIONS
 	character.
 	When multiple `--server-option=<option>` are given, they are all
 	sent to the other side in the order listed on the command line.
+	When no `--server-option=<option>` is given from the command line,
+	the values of configuration variable `remote.<name>.serverOption`
+	are used instead.
 
 <repository>::
 	The "remote" repository to query.  This parameter can be

builtin/fetch.c

@@ -1981,6 +1981,8 @@ static int fetch_multiple(struct string_list *list, int max_children,
 	strvec_pushl(&argv, "-c", "fetch.bundleURI=",
 		     "fetch", "--append", "--no-auto-gc",
 		     "--no-write-commit-graph", NULL);
+	for (i = 0; i < server_options.nr; i++)
+		strvec_pushf(&argv, "--server-option=%s", server_options.items[i].string);
 	add_options_to_argv(&argv, config);
 
 	if (max_children != 1 && list->nr != 1) {

builtin/ls-remote.c

@@ -173,5 +173,6 @@ int cmd_ls_remote(int argc,
 	transport_ls_refs_options_release(&transport_options);
 
 	strvec_clear(&pattern);
+	string_list_clear(&server_options, 0);
 	return status;
 }

builtin/push.c

@@ -519,14 +519,7 @@ static int git_push_config(const char *k, const char *v,
 			RECURSE_SUBMODULES_ON_DEMAND : RECURSE_SUBMODULES_OFF;
 		recurse_submodules = val;
 	} else if (!strcmp(k, "push.pushoption")) {
-		if (!v)
+		return parse_transport_option(k, v, &push_options_config);
-			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;
 	} else if (!strcmp(k, "color.push")) {
 		push_use_color = git_config_colorbool(k, v);
 		return 0;

remote.c

@@ -24,6 +24,7 @@
 #include "advice.h"
 #include "connect.h"
 #include "parse-options.h"
+#include "transport.h"
 
 enum map_direction { FROM_SRC, FROM_DST };
 
@@ -143,6 +144,7 @@ static struct remote *make_remote(struct remote_state *remote_state,
 	ret->name = xstrndup(name, len);
 	refspec_init(&ret->push, REFSPEC_PUSH);
 	refspec_init(&ret->fetch, REFSPEC_FETCH);
+	string_list_init_dup(&ret->server_options);
 
 	ALLOC_GROW(remote_state->remotes, remote_state->remotes_nr + 1,
 		   remote_state->remotes_alloc);
@@ -166,6 +168,7 @@ static void remote_clear(struct remote *remote)
 	free((char *)remote->uploadpack);
 	FREE_AND_NULL(remote->http_proxy);
 	FREE_AND_NULL(remote->http_proxy_authmethod);
+	string_list_clear(&remote->server_options, 0);
 }
 
 static void add_merge(struct branch *branch, const char *name)
@@ -508,6 +511,9 @@ static int handle_config(const char *key, const char *value,
 	} else if (!strcmp(subkey, "vcs")) {
 		FREE_AND_NULL(remote->foreign_vcs);
 		return git_config_string(&remote->foreign_vcs, key, value);
+	} else if (!strcmp(subkey, "serveroption")) {
+		return parse_transport_option(key, value,
+					      &remote->server_options);
 	}
 	return 0;
 }

remote.h

@@ -4,6 +4,7 @@
 #include "hash.h"
 #include "hashmap.h"
 #include "refspec.h"
+#include "string-list.h"
 #include "strvec.h"
 
 struct option;
@@ -104,6 +105,8 @@ struct remote {
 
 	/* The method used for authenticating against `http_proxy`. */
 	char *http_proxy_authmethod;
+
+	struct string_list server_options;
 };
 
 /**

t/t5702-protocol-v2.sh

@@ -185,6 +185,43 @@ test_expect_success 'server-options are sent when using ls-remote' '
 	grep "server-option=world" log
 '
 
+test_expect_success 'server-options from configuration are used by ls-remote' '
+	test_when_finished "rm -rf log myclone" &&
+	git clone "file://$(pwd)/file_parent" myclone &&
+	cat >expect <<-EOF &&
+	$(git -C file_parent rev-parse refs/heads/main)$(printf "\t")refs/heads/main
+	EOF
+
+	# Default server options from configuration are used
+	git -C myclone config --add remote.origin.serverOption foo &&
+	git -C myclone config --add remote.origin.serverOption bar &&
+	GIT_TRACE_PACKET="$(pwd)/log" git -C myclone -c protocol.version=2 \
+		ls-remote origin main >actual &&
+	test_cmp expect actual &&
+	test_grep "ls-remote> server-option=foo" log &&
+	test_grep "ls-remote> server-option=bar" log &&
+	rm -f log &&
+
+	# Empty value of remote.<name>.serverOption clears the list
+	git -C myclone config --add remote.origin.serverOption "" &&
+	git -C myclone config --add remote.origin.serverOption tar &&
+	GIT_TRACE_PACKET="$(pwd)/log" git -C myclone -c protocol.version=2 \
+		ls-remote origin main >actual &&
+	test_cmp expect actual &&
+	test_grep "ls-remote> server-option=tar" log &&
+	test_grep ! "ls-remote> server-option=foo" log &&
+	test_grep ! "ls-remote> server-option=bar" log &&
+	rm -f log &&
+
+	# Server option from command line overrides those from configuration
+	GIT_TRACE_PACKET="$(pwd)/log" git -C myclone -c protocol.version=2 \
+		ls-remote -o hello -o world origin main >actual &&
+	test_cmp expect actual &&
+	test_grep "ls-remote> server-option=hello" log &&
+	test_grep "ls-remote> server-option=world" log &&
+	test_grep ! "ls-remote> server-option=tar" log
+'
+
 test_expect_success 'warn if using server-option with ls-remote with legacy protocol' '
 	test_must_fail env GIT_TEST_PROTOCOL_VERSION=0 git -c protocol.version=0 \
 		ls-remote -o hello -o world "file://$(pwd)/file_parent" main 2>err &&
@@ -381,6 +418,54 @@ test_expect_success 'server-options are sent when fetching' '
 	grep "server-option=world" log
 '
 
+test_expect_success 'server-options are sent when fetch multiple remotes' '
+	test_when_finished "rm -f log server_options_sent" &&
+	git clone "file://$(pwd)/file_parent" child_multi_remotes &&
+	git -C child_multi_remotes remote add another "file://$(pwd)/file_parent" &&
+	GIT_TRACE_PACKET="$(pwd)/log" git -C child_multi_remotes -c protocol.version=2 \
+		fetch -o hello --all &&
+	grep "fetch> server-option=hello" log >server_options_sent &&
+	test_line_count = 2 server_options_sent
+'
+
+test_expect_success 'server-options from configuration are used by git-fetch' '
+	test_when_finished "rm -rf log myclone" &&
+	git clone "file://$(pwd)/file_parent" myclone &&
+	git -C file_parent log -1 --format=%s >expect &&
+
+	# Default server options from configuration are used
+	git -C myclone config --add remote.origin.serverOption foo &&
+	git -C myclone config --add remote.origin.serverOption bar &&
+	GIT_TRACE_PACKET="$(pwd)/log" git -C myclone -c protocol.version=2 \
+		fetch origin main &&
+	git -C myclone log -1 --format=%s origin/main >actual &&
+	test_cmp expect actual &&
+	test_grep "fetch> server-option=foo" log &&
+	test_grep "fetch> server-option=bar" log &&
+	rm -f log &&
+
+	# Empty value of remote.<name>.serverOption clears the list
+	git -C myclone config --add remote.origin.serverOption "" &&
+	git -C myclone config --add remote.origin.serverOption tar &&
+	GIT_TRACE_PACKET="$(pwd)/log" git -C myclone -c protocol.version=2 \
+		fetch origin main &&
+	git -C myclone log -1 --format=%s origin/main >actual &&
+	test_cmp expect actual &&
+	test_grep "fetch> server-option=tar" log &&
+	test_grep ! "fetch> server-option=foo" log &&
+	test_grep ! "fetch> server-option=bar" log &&
+	rm -f log &&
+
+	# Server option from command line overrides those from configuration
+	GIT_TRACE_PACKET="$(pwd)/log" git -C myclone -c protocol.version=2 \
+		fetch -o hello -o world origin main &&
+	git -C myclone log -1 --format=%s origin/main >actual &&
+	test_cmp expect actual &&
+	test_grep "fetch> server-option=hello" log &&
+	test_grep "fetch> server-option=world" log &&
+	test_grep ! "fetch> server-option=tar" log
+'
+
 test_expect_success 'warn if using server-option with fetch with legacy protocol' '
 	test_when_finished "rm -rf temp_child" &&
 
@@ -404,6 +489,37 @@ test_expect_success 'server-options are sent when cloning' '
 	grep "server-option=world" log
 '
 
+test_expect_success 'server-options from configuration are used by git-clone' '
+	test_when_finished "rm -rf log myclone" &&
+
+	# Default server options from configuration are used
+	GIT_TRACE_PACKET="$(pwd)/log" git -c protocol.version=2 \
+		-c remote.origin.serverOption=foo -c remote.origin.serverOption=bar \
+		clone "file://$(pwd)/file_parent" myclone &&
+	test_grep "clone> server-option=foo" log &&
+	test_grep "clone> server-option=bar" log &&
+	rm -rf log myclone &&
+
+	# Empty value of remote.<name>.serverOption clears the list
+	GIT_TRACE_PACKET="$(pwd)/log" git -c protocol.version=2 \
+		-c remote.origin.serverOption=foo -c remote.origin.serverOption=bar \
+		-c remote.origin.serverOption= -c remote.origin.serverOption=tar \
+		clone "file://$(pwd)/file_parent" myclone &&
+	test_grep "clone> server-option=tar" log &&
+	test_grep ! "clone> server-option=foo" log &&
+	test_grep ! "clone> server-option=bar" log &&
+	rm -rf log myclone &&
+
+	# Server option from command line overrides those from configuration
+	GIT_TRACE_PACKET="$(pwd)/log" git -c protocol.version=2 \
+		-c remote.origin.serverOption=tar \
+		clone --server-option=hello --server-option=world \
+		"file://$(pwd)/file_parent" myclone &&
+	test_grep "clone> server-option=hello" log &&
+	test_grep "clone> server-option=world" log &&
+	test_grep ! "clone> server-option=tar" log
+'
+
 test_expect_success 'warn if using server-option with clone with legacy protocol' '
 	test_when_finished "rm -rf myclone" &&
 
@@ -415,6 +531,23 @@ test_expect_success 'warn if using server-option with clone with legacy protocol
 	test_grep "server options require protocol version 2 or later" err
 '
 
+test_expect_success 'server-option configuration with legacy protocol is ok' '
+	test_when_finished "rm -rf myclone" &&
+
+	env GIT_TEST_PROTOCOL_VERSION=0 git -c protocol.version=0 \
+		-c remote.origin.serverOption=foo -c remote.origin.serverOption=bar \
+		clone "file://$(pwd)/file_parent" myclone
+'
+
+test_expect_success 'invalid server-option configuration' '
+	test_when_finished "rm -rf myclone" &&
+
+	test_must_fail git -c protocol.version=2 \
+		-c remote.origin.serverOption \
+		clone "file://$(pwd)/file_parent" myclone 2>err &&
+	test_grep "error: missing value for '\''remote.origin.serveroption'\''" err
+'
+
 test_expect_success 'upload-pack respects config using protocol v2' '
 	git init server &&
 	write_script server/.git/hook <<-\EOF &&

transport.c

@@ -334,6 +334,9 @@ static struct ref *handshake(struct transport *transport, int for_push,
 	data->version = discover_version(&reader);
 	switch (data->version) {
 	case protocol_v2:
+		if ((!transport->server_options || !transport->server_options->nr) &&
+		    transport->remote->server_options.nr)
+			transport->server_options = &transport->remote->server_options;
 		if (server_feature_v2("session-id", &server_sid))
 			trace2_data_string("transfer", NULL, "server-sid", server_sid);
 		if (must_list_refs)
@@ -1108,6 +1111,18 @@ int is_transport_allowed(const char *type, int from_user)
 	BUG("invalid protocol_allow_config type");
 }
 
+int parse_transport_option(const char *var, const char *value,
+			   struct string_list *transport_options)
+{
+	if (!value)
+		return config_error_nonbool(var);
+	if (!*value)
+		string_list_clear(transport_options, 0);
+	else
+		string_list_append(transport_options, value);
+	return 0;
+}
+
 void transport_check_allowed(const char *type)
 {
 	if (!is_transport_allowed(type, -1))

transport.h

@@ -342,4 +342,8 @@ void transport_print_push_status(const char *dest, struct ref *refs,
 /* common method used by transport-helper.c and send-pack.c */
 void reject_atomic_push(struct ref *refs, int mirror_mode);
 
+/* common method to parse push-option or server-option from config */
+int parse_transport_option(const char *var, const char *value,
+			   struct string_list *transport_options);
+
 #endif