[PATCH 02/11] maintenance: add --quiet option

["Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>]

From: Derrick Stolee <dstolee@microsoft.com>

Maintenance activities are commonly used as steps in larger scripts.
Providing a '--quiet' option allows those scripts to be less noisy when
run on a terminal window. Turn this mode on by default when stderr is
not a terminal.

Pipe the option to the 'git gc' child process.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 Documentation/git-maintenance.txt |  3 +++
 builtin/gc.c                      |  9 +++++++++
 t/t7900-maintenance.sh            | 15 ++++++++++-----
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/Documentation/git-maintenance.txt b/Documentation/git-maintenance.txt
index 34cd2b4417..089fa4cedc 100644
--- a/Documentation/git-maintenance.txt
+++ b/Documentation/git-maintenance.txt
@@ -52,6 +52,9 @@ OPTIONS
 	in the `gc.auto` config setting, or when the number of pack-files
 	exceeds the `gc.autoPackLimit` config setting.
 
+--quiet::
+	Do not report progress or other information over `stderr`.
+
 GIT
 ---
 Part of the linkgit:git[1] suite
diff --git a/builtin/gc.c b/builtin/gc.c
index e4f0ce1c86..a060ba8424 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -707,6 +707,7 @@ static const char * const builtin_maintenance_usage[] = {
 
 struct maintenance_opts {
 	int auto_flag;
+	int quiet;
 };
 
 static int maintenance_task_gc(struct maintenance_opts *opts)
@@ -718,6 +719,10 @@ static int maintenance_task_gc(struct maintenance_opts *opts)
 
 	if (opts->auto_flag)
 		strvec_push(&child.args, "--auto");
+	if (opts->quiet)
+		strvec_push(&child.args, "--quiet");
+	else
+		strvec_push(&child.args, "--no-quiet");
 
 	close_object_store(the_repository->objects);
 	return run_command(&child);
@@ -734,6 +739,8 @@ int cmd_maintenance(int argc, const char **argv, const char *prefix)
 	static struct option builtin_maintenance_options[] = {
 		OPT_BOOL(0, "auto", &opts.auto_flag,
 			 N_("run tasks based on the state of the repository")),
+		OPT_BOOL(0, "quiet", &opts.quiet,
+			 N_("do not report progress or other information over stderr")),
 		OPT_END()
 	};
 
@@ -743,6 +750,8 @@ int cmd_maintenance(int argc, const char **argv, const char *prefix)
 		usage_with_options(builtin_maintenance_usage,
 				   builtin_maintenance_options);
 
+	opts.quiet = !isatty(2);
+
 	argc = parse_options(argc, argv, prefix,
 			     builtin_maintenance_options,
 			     builtin_maintenance_usage,
diff --git a/t/t7900-maintenance.sh b/t/t7900-maintenance.sh
index c4b9b4a6fe..7b63b4ec0c 100755
--- a/t/t7900-maintenance.sh
+++ b/t/t7900-maintenance.sh
@@ -9,11 +9,16 @@ test_expect_success 'help text' '
 	test_i18ngrep "usage: git maintenance run" err
 '
 
-test_expect_success 'run [--auto]' '
-	GIT_TRACE2_EVENT="$(pwd)/run-no-auto.txt" git maintenance run &&
-	GIT_TRACE2_EVENT="$(pwd)/run-auto.txt" git maintenance run --auto &&
-	test_subcommand git gc <run-no-auto.txt &&
-	test_subcommand git gc --auto <run-auto.txt
+test_expect_success 'run [--auto|--quiet]' '
+	GIT_TRACE2_EVENT="$(pwd)/run-no-auto.txt" \
+		git maintenance run 2>/dev/null &&
+	GIT_TRACE2_EVENT="$(pwd)/run-auto.txt" \
+		git maintenance run --auto 2>/dev/null &&
+	GIT_TRACE2_EVENT="$(pwd)/run-no-quiet.txt" \
+		git maintenance run --no-quiet 2>/dev/null &&
+	test_subcommand git gc --quiet <run-no-auto.txt &&
+	test_subcommand git gc --auto --quiet <run-auto.txt &&
+	test_subcommand git gc --no-quiet <run-no-quiet.txt
 '
 
 test_done
-- 
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