[PATCH 13/15] job-runner: skip a job if job.<job-name>.enabled is false

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

From: Derrick Stolee <dstolee@microsoft.com>

Allow a user to specify that a job should not be run on a given
repo by setting "job.<job-name>.enabled = false". The job-runner
will check this config before any other options and stop running
the job on that repo. If the config is disabled in the config
read by the job-runner itself (i.e. in global config) then the
job-runner will not attempt to run the job on any of the repos.

Since this config is checked dynamically, the job-runner does will
see config changes without needing to restart the process.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 Documentation/config/job.txt |  4 ++++
 builtin/job-runner.c         | 26 ++++++++++++++++++++++++--
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/Documentation/config/job.txt b/Documentation/config/job.txt
index 772001e6744..6c22a40dd36 100644
--- a/Documentation/config/job.txt
+++ b/Documentation/config/job.txt
@@ -2,6 +2,10 @@ job.loopInterval::
 	The number of seconds to sleep between rounds of running
 	background jobs in `git job-runner`.
 
+job.<job-name>.enabled::
+	If set to `false`, this option will disable the `<job-name>`
+	when run by `git job-runner`.
+
 job.<job-name>.interval::
 	The minimum number of seconds between runs of
 	`git run-job <job-name>` when running `git job-runner`.
diff --git a/builtin/job-runner.c b/builtin/job-runner.c
index d1fca2c97b8..45f82a50d49 100644
--- a/builtin/job-runner.c
+++ b/builtin/job-runner.c
@@ -216,13 +216,31 @@ static int load_active_repos(struct string_list *repos)
 	return 0;
 }
 
+static int job_disabled(const char *job, const char *repo)
+{
+	char *enabled;
+
+	if (!try_get_config(job, repo, "enabled", &enabled)) {
+		int enabled_int = git_parse_maybe_bool(enabled);
+		free(enabled);
+		return !enabled_int;
+	}
+
+	return 0;
+}
+
 static int run_job(const char *job, const char *repo)
 {
 	int result;
 	struct argv_array cmd = ARGV_ARRAY_INIT;
 	timestamp_t now = time(NULL);
-	timestamp_t last_run = get_last_run(job, repo);
-	timestamp_t interval = get_interval(job, repo);
+	timestamp_t last_run, interval;
+
+	if (job_disabled(job, repo))
+		return 0;
+
+	last_run = get_last_run(job, repo);
+	interval = get_interval(job, repo);
 
 	if (last_run + interval > now)
 		return 0;
@@ -247,6 +265,10 @@ static int run_job_loop_step(struct string_list *list)
 	     !result && job && job < list->items + list->nr;
 	     job++) {
 		struct string_list_item *repo;
+
+		if (job_disabled(job->string, "."))
+			continue;
+
 		for (repo = repos.items;
 		     !result && repo && repo < repos.items + repos.nr;
 		     repo++)
-- 
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