[PATCH] Added support for new configuration parameter push.pushOption

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builtin/push.c: add push.pushOption config

Currently push options need to be given explicitly, via
the command line as "git push --push-option".

The UX of Git would be enhanced if push options could be
configured instead of given each time on the command line.

Add the config option push.pushOption, which is a multi
string option, containing push options that are sent by default.

When push options are set in the system wide config
(/etc/gitconfig), they can be unset later in the more specific
repository config by setting the string to the empty string.

Add tests and documentation as well.

Signed-off-by: Marius Paliga <marius.paliga@xxxxxxxxx>
---
 Documentation/git-push.txt |  3 ++
 builtin/push.c             | 12 ++++++++
 t/t5545-push-options.sh    | 77 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+)

diff --git a/Documentation/git-push.txt b/Documentation/git-push.txt
index 3e76e99f3..da9b17624 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.
+    Default push options can also be specified with configuration
+    variable `push.pushOption`. String(s) specified here will always
+    be passed to the server without need to specify it using `--push-option`

 --receive-pack=<git-receive-pack>::
 --exec=<git-receive-pack>::
diff --git a/builtin/push.c b/builtin/push.c
index 2ac810422..10e520c8f 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_from_config = STRING_LIST_INIT_DUP;
+
 static void add_refspec(const char *ref)
 {
     refspec_nr++;
@@ -503,6 +505,14 @@ 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 == NULL)
+            return config_error_nonbool(k);
+        else
+            if (v[0] == '\0')
+                string_list_clear(&push_options_from_config, 0);
+            else
+                string_list_append(&push_options_from_config, v);
     }

     return git_default_config(k, v, NULL);
@@ -562,6 +572,8 @@ 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);
+    if (!push_options.nr)
+        push_options = push_options_from_config;
     set_push_cert_flags(&flags, push_cert);

     if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL |
TRANSPORT_PUSH_MIRROR))))
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}



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