remote: introduce remote.<name>.serverOption configuration

Currently, server options for Git protocol v2 can only be specified via the command line option "--server-option" or "-o", which is inconvenient when users want to specify a list of default options to send. Therefore, we are introducing a new configuration to hold a list of default server options, akin to the `push.pushOption` configuration for push options. Initially, I named the new configuration `fetch.serverOption` to align with `push.pushOption`. However, after discussing with Patrick, it was renamed to `remote.<name>.serverOption` as suggested, because: 1. Server options are designed to be server-specific, making it more logical to use a per-remote configuration. 2. Using "fetch." prefixed configurations in git-clone or git-ls-remote seems out of place and inconsistent in design. The parsing logic for `remote.<name>.serverOption` also relies on `transport.c:parse_transport_option`, similar to `push.pushOption`, and they follow the same priority design: 1. Server options set in lower-priority configuration files (e.g., /etc/gitconfig or $HOME/.gitconfig) can be overridden or unset in more specific repository configurations using an empty string. 2. Command-line specified server options take precedence over those from the configuration. Server options from configuration are stored to the corresponding `remote.h:remote` as a new field `server_options`. The field will be utilized in the subsequent commit to help initialize the `server_options` of `transport.h:transport`. And documentation have been updated accordingly. Helped-by: Patrick Steinhardt <ps@pks.im> Helped-by: Junio C Hamano <gitster@pobox.com> Reported-by: Liu Zhongbo <liuzhongbo.6666@bytedance.com> Signed-off-by: Xing Xin <xingxin.xx@bytedance.com> Reviewed-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Xing Xin committed Oct 8, 2024 at 03:38 UTC 72da5cfb1c81a1835a1f6bad5f19451baf9ad03c
3 files changed +19
Documentation/config/remote.txt
+10
@@ -96,3 +96,13 @@ remote.<name>.partialclonefilter::
96 Changing or clearing this value will only affect fetches for new commits.
97 To fetch associated objects for commits already present in the local object
98 database, use the `--refetch` option of linkgit:git-fetch[1].
99 +
100 +remote.<name>.serverOption::
101 + The default set of server options used when fetching from this remote.
102 + These server options can be overridden by the `--server-option=` command
103 + line arguments.
104 ++
105 +This is a multi-valued variable, and an empty value can be used in a higher
106 +priority configuration file (e.g. `.git/config` in a repository) to clear
107 +the values inherited from a lower priority configuration files (e.g.
108 +`$HOME/.gitconfig`).
remote.c
+6
@@ -24,6 +24,7 @@
24 #include "advice.h"
25 #include "connect.h"
26 #include "parse-options.h"
27 +#include "transport.h"
28
29 enum map_direction { FROM_SRC, FROM_DST };
30
@@ -143,6 +144,7 @@ static struct remote *make_remote(struct remote_state *remote_state,
144 ret->name = xstrndup(name, len);
145 refspec_init(&ret->push, REFSPEC_PUSH);
146 refspec_init(&ret->fetch, REFSPEC_FETCH);
147 + string_list_init_dup(&ret->server_options);
148
149 ALLOC_GROW(remote_state->remotes, remote_state->remotes_nr + 1,
150 remote_state->remotes_alloc);
@@ -166,6 +168,7 @@ static void remote_clear(struct remote *remote)
168 free((char *)remote->uploadpack);
169 FREE_AND_NULL(remote->http_proxy);
170 FREE_AND_NULL(remote->http_proxy_authmethod);
171 + string_list_clear(&remote->server_options, 0);
172 }
173
174 static void add_merge(struct branch *branch, const char *name)
@@ -508,6 +511,9 @@ static int handle_config(const char *key, const char *value,
511 } else if (!strcmp(subkey, "vcs")) {
512 FREE_AND_NULL(remote->foreign_vcs);
513 return git_config_string(&remote->foreign_vcs, key, value);
514 + } else if (!strcmp(subkey, "serveroption")) {
515 + return parse_transport_option(key, value,
516 + &remote->server_options);
517 }
518 return 0;
519 }
remote.h
+3
@@ -4,6 +4,7 @@
4 #include "hash.h"
5 #include "hashmap.h"
6 #include "refspec.h"
7 +#include "string-list.h"
8 #include "strvec.h"
9
10 struct option;
@@ -104,6 +105,8 @@ struct remote {
105
106 /* The method used for authenticating against `http_proxy`. */
107 char *http_proxy_authmethod;
108 +
109 + struct string_list server_options;
110 };
111
112 /**