[PATCH] fetch: add new config option fetch.all

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This commit introduces the new boolean configuration option fetch.all
which allows to fetch all available remotes by default. The config
option can be overridden by explicitly specifying a remote.
The behavior for --all is unchanged and calling git-fetch with --all and
a remote will still result in an error.

The option was also added to the config documentation and new tests
cover the expected behavior.

Signed-off-by: Tamino Bauknecht <dev@xxxxxx>
---
I hopefully incorporated the feedback of all of you, thanks for the
valuable suggestions.

I'm still not entirely happy with the tests (especially the `cp` in
there) and the heredoc doesn't seem to respect the one additional
space of its indentation - I am admittedly not the best POSIX shell
developer, if anyone has an idea on how to improve it, your suggestion
is welcome.

 Documentation/config/fetch.txt |  5 +++
 builtin/fetch.c                | 11 +++++
 t/t5514-fetch-multiple.sh      | 75 ++++++++++++++++++++++++++++++++++
 3 files changed, 91 insertions(+)

diff --git a/Documentation/config/fetch.txt b/Documentation/config/fetch.txt
index aea5b97477..0638cf276e 100644
--- a/Documentation/config/fetch.txt
+++ b/Documentation/config/fetch.txt
@@ -50,6 +50,11 @@ fetch.pruneTags::
 	refs. See also `remote.<name>.pruneTags` and the PRUNING
 	section of linkgit:git-fetch[1].
 
+fetch.all::
+	If true, fetch will attempt to update all available remotes.
+	This behavior can be overridden by explicitly specifying one or
+	more remote(s) to fetch from. Defaults to false.
+
 fetch.output::
 	Control how ref update status is printed. Valid values are
 	`full` and `compact`. Default value is `full`. See the
diff --git a/builtin/fetch.c b/builtin/fetch.c
index a284b970ef..f1ad3e608e 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -102,6 +102,7 @@ static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
 
 struct fetch_config {
 	enum display_format display_format;
+	int all;
 	int prune;
 	int prune_tags;
 	int show_forced_updates;
@@ -115,6 +116,11 @@ static int git_fetch_config(const char *k, const char *v,
 {
 	struct fetch_config *fetch_config = cb;
 
+	if (!strcmp(k, "fetch.all")) {
+		fetch_config->all = git_config_bool(k, v);
+		return 0;
+	}
+
 	if (!strcmp(k, "fetch.prune")) {
 		fetch_config->prune = git_config_bool(k, v);
 		return 0;
@@ -2121,6 +2127,7 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 {
 	struct fetch_config config = {
 		.display_format = DISPLAY_FORMAT_FULL,
+		.all = -1,
 		.prune = -1,
 		.prune_tags = -1,
 		.show_forced_updates = 1,
@@ -2342,6 +2349,10 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 			die(_("fetch --all does not take a repository argument"));
 		else if (argc > 1)
 			die(_("fetch --all does not make sense with refspecs"));
+	}
+
+	if (all || (config.all > 0 && !argc)) {
+		/* Only use fetch.all config option if no remotes were explicitly given */
 		(void) for_each_remote(get_one_remote_for_fetch, &list);
 
 		/* do not do fetch_multiple() of one */
diff --git a/t/t5514-fetch-multiple.sh b/t/t5514-fetch-multiple.sh
index a95841dc36..806b87c727 100755
--- a/t/t5514-fetch-multiple.sh
+++ b/t/t5514-fetch-multiple.sh
@@ -24,6 +24,15 @@ setup_repository () {
 	)
 }
 
+setup_test_clone () {
+	test_dir="$1"
+	git clone one "$test_dir"
+	for r in one two three
+	do
+		git -C "$test_dir" remote add "$r" "../$r" || return 1
+	done
+}
+
 test_expect_success setup '
 	setup_repository one &&
 	setup_repository two &&
@@ -209,4 +218,70 @@ test_expect_success 'git fetch --multiple --jobs=0 picks a default' '
 	 git fetch --multiple --jobs=0)
 '
 
+for fetch_all in true false
+do
+	test_expect_success "git fetch --all (works with fetch.all = $fetch_all)" '
+		test_dir="test_fetch_all_$fetch_all" &&
+		setup_test_clone "$test_dir" && (
+		 cd "$test_dir" &&
+		 git config fetch.all $fetch_all &&
+		 git fetch --all &&
+		 cat >expect <<-\ EOF &&
+		  one/main
+		  one/side
+		  origin/HEAD -> origin/main
+		  origin/main
+		  origin/side
+		  three/another
+		  three/main
+		  three/side
+		  two/another
+		  two/main
+		  two/side
+		 EOF
+		 git branch -r >actual &&
+		 test_cmp expect actual)
+	'
+done
+
+test_expect_success 'git fetch (fetch all remotes with fetch.all = true)' '
+	setup_test_clone test9 && (
+	 cd test9 &&
+	 git config fetch.all true &&
+	 git fetch --all &&
+	 git branch -r >actual &&
+	 cp ../test_fetch_all_true/expect . &&
+	 test_cmp expect actual)
+'
+
+test_expect_success 'git fetch one (explicit remote overrides fetch.all)' '
+	setup_test_clone test10 && (
+	 cd test10 &&
+	 git config fetch.all true &&
+	 git fetch one &&
+	 cat >expect <<-\ EOF &&
+	  one/main
+	  one/side
+	  origin/HEAD -> origin/main
+	  origin/main
+	  origin/side
+	 EOF
+	 git branch -r >actual &&
+	 test_cmp expect actual)
+'
+
+test_expect_success 'git config fetch.all false (fetch only default remote)' '
+	setup_test_clone test11 && (
+	 cd test11 &&
+	 git config fetch.all false &&
+	 git fetch &&
+	 cat >expect <<-\ EOF &&
+	  origin/HEAD -> origin/main
+	  origin/main
+	  origin/side
+	 EOF
+	 git branch -r >actual &&
+	 test_cmp expect actual)
+'
+
 test_done
-- 
2.43.0





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