[PATCH v3 1/6] maintenance: optionally skip --auto process

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

From: Derrick Stolee <dstolee@microsoft.com>

Some commands run 'git maintenance run --auto --[no-]quiet' after doing
their normal work, as a way to keep repositories clean as they are used.
Currently, users who do not want this maintenance to occur would set the
'gc.auto' config option to 0 to avoid the 'gc' task from running.
However, this does not stop the extra process invocation. On Windows,
this extra process invocation can be more expensive than necessary.

Allow users to drop this extra process by setting 'maintenance.auto' to
'false'.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 Documentation/config/maintenance.txt |  5 +++++
 run-command.c                        |  6 ++++++
 t/t7900-maintenance.sh               | 13 +++++++++++++
 3 files changed, 24 insertions(+)

diff --git a/Documentation/config/maintenance.txt b/Documentation/config/maintenance.txt
index a0706d8f09..06db758172 100644
--- a/Documentation/config/maintenance.txt
+++ b/Documentation/config/maintenance.txt
@@ -1,3 +1,8 @@
+maintenance.auto::
+	This boolean config option controls whether some commands run
+	`git maintenance run --auto` after doing their normal work. Defaults
+	to true.
+
 maintenance.<task>.enabled::
 	This boolean config option controls whether the maintenance task
 	with name `<task>` is run when no `--task` option is specified to
diff --git a/run-command.c b/run-command.c
index 2ee59acdc8..ea4d0fb4b1 100644
--- a/run-command.c
+++ b/run-command.c
@@ -7,6 +7,7 @@
 #include "strbuf.h"
 #include "string-list.h"
 #include "quote.h"
+#include "config.h"
 
 void child_process_init(struct child_process *child)
 {
@@ -1868,8 +1869,13 @@ int run_processes_parallel_tr2(int n, get_next_task_fn get_next_task,
 
 int run_auto_maintenance(int quiet)
 {
+	int enabled;
 	struct child_process maint = CHILD_PROCESS_INIT;
 
+	if (!git_config_get_bool("maintenance.auto", &enabled) &&
+	    !enabled)
+		return 0;
+
 	maint.git_cmd = 1;
 	strvec_pushl(&maint.args, "maintenance", "run", "--auto", NULL);
 	strvec_push(&maint.args, quiet ? "--quiet" : "--no-quiet");
diff --git a/t/t7900-maintenance.sh b/t/t7900-maintenance.sh
index 6f878b0141..e0ba19e1ff 100755
--- a/t/t7900-maintenance.sh
+++ b/t/t7900-maintenance.sh
@@ -26,6 +26,19 @@ test_expect_success 'run [--auto|--quiet]' '
 	test_subcommand git gc --no-quiet <run-no-quiet.txt
 '
 
+test_expect_success 'maintenance.auto config option' '
+	GIT_TRACE2_EVENT="$(pwd)/default" git commit --quiet --allow-empty -m 1 &&
+	test_subcommand git maintenance run --auto --quiet <default &&
+	GIT_TRACE2_EVENT="$(pwd)/true" \
+		git -c maintenance.auto=true \
+		commit --quiet --allow-empty -m 2 &&
+	test_subcommand git maintenance run --auto --quiet  <true &&
+	GIT_TRACE2_EVENT="$(pwd)/false" \
+		git -c maintenance.auto=false \
+		commit --quiet --allow-empty -m 3 &&
+	test_subcommand ! git maintenance run --auto --quiet  <false
+'
+
 test_expect_success 'maintenance.<task>.enabled' '
 	git config maintenance.gc.enabled false &&
 	git config maintenance.commit-graph.enabled true &&
-- 
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