[v5,09/11] maintenance: use pointers to check --auto

Commit Message

Philippe Blain via GitGitGadget Sept. 17, 2020, 6:11 p.m. UTC

From: Derrick Stolee <[e-mail]>

The 'git maintenance run' command has an '--auto' option. This is used
by other Git commands such as 'git commit' or 'git fetch' to check if
maintenance should be run after adding data to the repository.

Previously, this --auto option was only used to add the argument to the
'git gc' command as part of the 'gc' task. We will be expanding the
other tasks to perform a check to see if they should do work as part of
the --auto flag, when they are enabled by config.

First, update the 'gc' task to perform the auto check inside the
maintenance process. This prevents running an extra 'git gc --auto'
command when not needed. It also shows a model for other tasks.

Second, use the 'auto_condition' function pointer as a signal for
whether we enable the maintenance task under '--auto'. For instance, we
do not want to enable the 'fetch' task in '--auto' mode, so that
function pointer will remain NULL.

Now that we are not automatically calling 'git gc', a test in
t5514-fetch-multiple.sh must be changed to watch for 'git maintenance'
instead.

We continue to pass the '--auto' option to the 'git gc' command when
necessary, because of the gc.autoDetach config option changes behavior.
Likely, we will want to absorb the daemonizing behavior implied by
gc.autoDetach as a maintenance.autoDetach config option.

Signed-off-by: Derrick Stolee <[e-mail]>
Signed-off-by: Junio C Hamano <[e-mail]>
---
 builtin/gc.c              | 16 ++++++++++++++++
 t/t5514-fetch-multiple.sh |  2 +-
 t/t7900-maintenance.sh    |  2 +-
 3 files changed, 18 insertions(+), 2 deletions(-)

Patch

diff --git a/builtin/gc.c b/builtin/gc.c
index 55a3d836f0..13c24bca7d 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -755,9 +755,17 @@  static int maintenance_task_gc(struct maintenance_run_opts *opts)
 
 typedef int maintenance_task_fn(struct maintenance_run_opts *opts);
 
+/*
+ * An auto condition function returns 1 if the task should run
+ * and 0 if the task should NOT run. See needs_to_gc() for an
+ * example.
+ */
+typedef int maintenance_auto_fn(void);
+
 struct maintenance_task {
 	const char *name;
 	maintenance_task_fn *fn;
+	maintenance_auto_fn *auto_condition;
 	unsigned enabled:1;
 
 	/* -1 if not selected. */
@@ -776,6 +784,7 @@  static struct maintenance_task tasks[] = {
 	[TASK_GC] = {
 		"gc",
 		maintenance_task_gc,
+		need_to_gc,
 		1,
 	},
 	[TASK_COMMIT_GRAPH] = {
@@ -831,6 +840,11 @@  static int maintenance_run_tasks(struct maintenance_run_opts *opts)
 		if (!found_selected && !tasks[i].enabled)
 			continue;
 
+		if (opts->auto_flag &&
+		    (!tasks[i].auto_condition ||
+		     !tasks[i].auto_condition()))
+			continue;
+
 		if (tasks[i].fn(opts)) {
 			error(_("task '%s' failed"), tasks[i].name);
 			result = 1;
@@ -845,6 +859,8 @@  static void initialize_task_config(void)
 {
 	int i;
 	struct strbuf config_name = STRBUF_INIT;
+	gc_config();
+
 	for (i = 0; i < TASK__COUNT; i++) {
 		int config_value;
 
diff --git a/t/t5514-fetch-multiple.sh b/t/t5514-fetch-multiple.sh
index de8e2f1531..bd202ec6f3 100755
--- a/t/t5514-fetch-multiple.sh
+++ b/t/t5514-fetch-multiple.sh
@@ -108,7 +108,7 @@  test_expect_success 'git fetch --multiple (two remotes)' '
 	 GIT_TRACE=1 git fetch --multiple one two 2>trace &&
 	 git branch -r > output &&
 	 test_cmp ../expect output &&
-	 grep "built-in: git gc" trace >gc &&
+	 grep "built-in: git maintenance" trace >gc &&
 	 test_line_count = 1 gc
 	)
 '
diff --git a/t/t7900-maintenance.sh b/t/t7900-maintenance.sh
index 8a162a18ba..53c883531e 100755
--- a/t/t7900-maintenance.sh
+++ b/t/t7900-maintenance.sh
@@ -23,7 +23,7 @@  test_expect_success 'run [--auto|--quiet]' '
 	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 --auto --quiet <run-auto.txt &&
 	test_subcommand git gc --no-quiet <run-no-quiet.txt
 '