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maintenance: use pointers to check --auto

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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 <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee 2020-09-17 18:11:50 +00:00 committed by Junio C Hamano
parent 65d655b52d
commit 916d0626c2
3 changed files with 18 additions and 2 deletions
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16
builtin/gc.c
View file

@ -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;

2
t/t5514-fetch-multiple.sh
View file

@ -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
)
'

2
t/t7900-maintenance.sh
View file

@ -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
'