Graceful: Xorm, RepoIndexer, Cron and Others (#9282)

* Change graceful to use a singleton obtained through GetManager instead of a global.
* Graceful: Make TestPullRequests shutdownable
* Graceful: Make the cron tasks graceful
* Graceful: AddTestPullRequest run in graceful ctx
* Graceful: SyncMirrors shutdown
* Graceful: SetDefaultContext for Xorm to be HammerContext
* Avoid starting graceful for migrate commands and checkout
* Graceful: DeliverHooks now can be shutdown
* Fix multiple syncing errors in modules/sync/UniqueQueue &  Make UniqueQueue closable
* Begin the process of making the repo indexer shutdown gracefully

1 files changed, 5 insertions, 4 deletions

diff --git a/models/pull_list.go b/models/pull_list.go
index 49d04ba0b8..1376978353 100644
--- a/models/pull_list.go
+++ b/models/pull_list.go
@@ -68,11 +68,12 @@ func GetUnmergedPullRequestsByBaseInfo(repoID int64, branch string) ([]*PullRequ
 		Find(&prs)
 }
 
-// GetPullRequestsByCheckStatus returns all pull requests according the special checking status.
-func GetPullRequestsByCheckStatus(status PullRequestStatus) ([]*PullRequest, error) {
-	prs := make([]*PullRequest, 0, 10)
-	return prs, x.
+// GetPullRequestIDsByCheckStatus returns all pull requests according the special checking status.
+func GetPullRequestIDsByCheckStatus(status PullRequestStatus) ([]int64, error) {
+	prs := make([]int64, 0, 10)
+	return prs, x.Table("pull_request").
 		Where("status=?", status).
+		Cols("pull_request.id").
 		Find(&prs)
 }