maintenance: add --schedule option and config
Maintenance currently triggers when certain data-size thresholds are met, such as number of pack-files or loose objects. Users may want to run certain maintenance tasks based on frequency instead. For example, a user may want to perform a 'prefetch' task every hour, or 'gc' task every day. To help these users, update the 'git maintenance run' command to include a '--schedule=<frequency>' option. The allowed frequencies are 'hourly', 'daily', and 'weekly'. These values are also allowed in a new config value 'maintenance.<task>.schedule'. The 'git maintenance run --schedule=<frequency>' checks the '*.schedule' config value for each enabled task to see if the configured frequency is at least as frequent as the frequency from the '--schedule' argument. We use the following order, for full clarity: 'hourly' > 'daily' > 'weekly' Use new 'enum schedule_priority' to track these values numerically. The following cron table would run the scheduled tasks with the correct frequencies: 0 1-23 * * * git -C <repo> maintenance run --schedule=hourly 0 0 * * 1-6 git -C <repo> maintenance run --schedule=daily 0 0 * * 0 git -C <repo> maintenance run --schedule=weekly This cron schedule will run --schedule=hourly every hour except at midnight. This avoids a concurrent run with the --schedule=daily that runs at midnight every day except the first day of the week. This avoids a concurrent run with the --schedule=weekly that runs at midnight on the first day of the week. Since --schedule=daily also runs the 'hourly' tasks and --schedule=weekly runs the 'hourly' and 'daily' tasks, we will still see all tasks run with the proper frequencies. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Derrick Stolee committed
Sep 11, 2020 at 17:49 UTC
b08ff1fee000230ad22fee823aabff2613bd4e62
4 files changed
+118
-4
Documentation/config/maintenance.txt
+5
index 06db758172..70585564fa 100644
--- a/Documentation/config/maintenance.txt
+++ b/Documentation/config/maintenance.txt
@@ -10,6 +10,11 @@ maintenance.<task>.enabled::
`--task` option exists. By default, only `maintenance.gc.enabled`
is true.
+maintenance.<task>.schedule::
+ This config option controls whether or not the given `<task>` runs
+ during a `git maintenance run --schedule=<frequency>` command. The
+ value must be one of "hourly", "daily", or "weekly".
+
maintenance.commit-graph.auto::
This integer config option controls how often the `commit-graph` task
should be run as part of `git maintenance run --auto`. If zero, then
Documentation/git-maintenance.txt
+12
-1
index 3f5d8946b4..ed94f66e36 100644
--- a/Documentation/git-maintenance.txt
+++ b/Documentation/git-maintenance.txt
@@ -110,7 +110,18 @@ OPTIONS
only if certain thresholds are met. For example, the `gc` task
runs when the number of loose objects exceeds the number stored
in the `gc.auto` config setting, or when the number of pack-files
- exceeds the `gc.autoPackLimit` config setting.
+ exceeds the `gc.autoPackLimit` config setting. Not compatible with
+ the `--schedule` option.
+
+--schedule::
+ When combined with the `run` subcommand, run maintenance tasks
+ only if certain time conditions are met, as specified by the
+ `maintenance.<task>.schedule` config value for each `<task>`.
+ This config value specifies a number of seconds since the last
+ time that task ran, according to the `maintenance.<task>.lastRun`
+ config value. The tasks that are tested are those provided by
+ the `--task=<task>` option(s) or those with
+ `maintenance.<task>.enabled` set to true.
--quiet::
Do not report progress or other information over `stderr`.
builtin/gc.c
+61
-3
index 2b99596ec8..03b24ea0db 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -703,14 +703,51 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
return 0;
}
-static const char * const builtin_maintenance_run_usage[] = {
- N_("git maintenance run [--auto] [--[no-]quiet] [--task=<task>]"),
+static const char *const builtin_maintenance_run_usage[] = {
+ N_("git maintenance run [--auto] [--[no-]quiet] [--task=<task>] [--schedule]"),
NULL
};
+enum schedule_priority {
+ SCHEDULE_NONE = 0,
+ SCHEDULE_WEEKLY = 1,
+ SCHEDULE_DAILY = 2,
+ SCHEDULE_HOURLY = 3,
+};
+
+static enum schedule_priority parse_schedule(const char *value)
+{
+ if (!value)
+ return SCHEDULE_NONE;
+ if (!strcasecmp(value, "hourly"))
+ return SCHEDULE_HOURLY;
+ if (!strcasecmp(value, "daily"))
+ return SCHEDULE_DAILY;
+ if (!strcasecmp(value, "weekly"))
+ return SCHEDULE_WEEKLY;
+ return SCHEDULE_NONE;
+}
+
+static int maintenance_opt_schedule(const struct option *opt, const char *arg,
+ int unset)
+{
+ enum schedule_priority *priority = opt->value;
+
+ if (unset)
+ die(_("--no-schedule is not allowed"));
+
+ *priority = parse_schedule(arg);
+
+ if (!*priority)
+ die(_("unrecognized --schedule argument '%s'"), arg);
+
+ return 0;
+}
+
struct maintenance_run_opts {
int auto_flag;
int quiet;
+ enum schedule_priority schedule;
};
/* Remember to update object flag allocation in object.h */
@@ -1158,6 +1195,8 @@ struct maintenance_task {
maintenance_auto_fn *auto_condition;
unsigned enabled:1;
+ enum schedule_priority schedule;
+
/* -1 if not selected. */
int selected_order;
};
@@ -1253,6 +1292,9 @@ static int maintenance_run_tasks(struct maintenance_run_opts *opts)
!tasks[i].auto_condition()))
continue;
+ if (opts->schedule && tasks[i].schedule < opts->schedule)
+ continue;
+
trace2_region_enter("maintenance", tasks[i].name, r);
if (tasks[i].fn(opts)) {
error(_("task '%s' failed"), tasks[i].name);
@@ -1273,13 +1315,23 @@ static void initialize_task_config(void)
for (i = 0; i < TASK__COUNT; i++) {
int config_value;
+ char *config_str;
- strbuf_setlen(&config_name, 0);
+ strbuf_reset(&config_name);
strbuf_addf(&config_name, "maintenance.%s.enabled",
tasks[i].name);
if (!git_config_get_bool(config_name.buf, &config_value))
tasks[i].enabled = config_value;
+
+ strbuf_reset(&config_name);
+ strbuf_addf(&config_name, "maintenance.%s.schedule",
+ tasks[i].name);
+
+ if (!git_config_get_string(config_name.buf, &config_str)) {
+ tasks[i].schedule = parse_schedule(config_str);
+ free(config_str);
+ }
}
strbuf_release(&config_name);
@@ -1323,6 +1375,9 @@ static int maintenance_run(int argc, const char **argv, const char *prefix)
struct option builtin_maintenance_run_options[] = {
OPT_BOOL(0, "auto", &opts.auto_flag,
N_("run tasks based on the state of the repository")),
+ OPT_CALLBACK(0, "schedule", &opts.schedule, N_("frequency"),
+ N_("run tasks based on frequency"),
+ maintenance_opt_schedule),
OPT_BOOL(0, "quiet", &opts.quiet,
N_("do not report progress or other information over stderr")),
OPT_CALLBACK_F(0, "task", NULL, N_("task"),
@@ -1343,6 +1398,9 @@ static int maintenance_run(int argc, const char **argv, const char *prefix)
builtin_maintenance_run_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
+ if (opts.auto_flag && opts.schedule)
+ die(_("use at most one of --auto and --schedule=<frequency>"));
+
if (argc != 0)
usage_with_options(builtin_maintenance_run_usage,
builtin_maintenance_run_options);
t/t7900-maintenance.sh
+40
index c7caaa7a55..33d73cd01c 100755
--- a/t/t7900-maintenance.sh
+++ b/t/t7900-maintenance.sh
@@ -260,4 +260,44 @@ test_expect_success 'maintenance.incremental-repack.auto' '
test_subcommand git multi-pack-index write --no-progress <trace-B
'
+test_expect_success '--auto and --schedule incompatible' '
+ test_must_fail git maintenance run --auto --schedule=daily 2>err &&
+ test_i18ngrep "at most one" err
+'
+
+test_expect_success 'invalid --schedule value' '
+ test_must_fail git maintenance run --schedule=annually 2>err &&
+ test_i18ngrep "unrecognized --schedule" err
+'
+
+test_expect_success '--schedule inheritance weekly -> daily -> hourly' '
+ git config maintenance.loose-objects.enabled true &&
+ git config maintenance.loose-objects.schedule hourly &&
+ git config maintenance.commit-graph.enabled true &&
+ git config maintenance.commit-graph.schedule daily &&
+ git config maintenance.incremental-repack.enabled true &&
+ git config maintenance.incremental-repack.schedule weekly &&
+
+ GIT_TRACE2_EVENT="$(pwd)/hourly.txt" \
+ git maintenance run --schedule=hourly 2>/dev/null &&
+ test_subcommand git prune-packed --quiet <hourly.txt &&
+ test_subcommand ! git commit-graph write --split --reachable \
+ --no-progress <hourly.txt &&
+ test_subcommand ! git multi-pack-index write --no-progress <hourly.txt &&
+
+ GIT_TRACE2_EVENT="$(pwd)/daily.txt" \
+ git maintenance run --schedule=daily 2>/dev/null &&
+ test_subcommand git prune-packed --quiet <daily.txt &&
+ test_subcommand git commit-graph write --split --reachable \
+ --no-progress <daily.txt &&
+ test_subcommand ! git multi-pack-index write --no-progress <daily.txt &&
+
+ GIT_TRACE2_EVENT="$(pwd)/weekly.txt" \
+ git maintenance run --schedule=weekly 2>/dev/null &&
+ test_subcommand git prune-packed --quiet <weekly.txt &&
+ test_subcommand git commit-graph write --split --reachable \
+ --no-progress <weekly.txt &&
+ test_subcommand git multi-pack-index write --no-progress <weekly.txt
+'
+
test_done