Dont overwrite err with nil & rename PullCheckingFuncs to reflect there usage (#19572)

- dont overwrite err with nil unintentionaly
- rename CheckPRReadyToMerge to CheckPullBranchProtections
- rename prQueue to prPatchCheckerQueue

from #9307

Co-authored-by: delvh <dev.lh@web.de>

4 files changed, 22 insertions, 22 deletions

diff --git a/routers/private/hook_pre_receive.go b/routers/private/hook_pre_receive.go
index 8824d9cc39..731b36fc1e 100644
--- a/routers/private/hook_pre_receive.go
+++ b/routers/private/hook_pre_receive.go
@@ -343,7 +343,7 @@ func preReceiveBranch(ctx *preReceiveContext, oldCommitID, newCommitID, refFullN
 		}
 
 		// Check all status checks and reviews are ok
-		if err := pull_service.CheckPRReadyToMerge(ctx, pr, true); err != nil {
+		if err := pull_service.CheckPullBranchProtections(ctx, pr, true); err != nil {
 			if models.IsErrDisallowedToMerge(err) {
 				log.Warn("Forbidden: User %d is not allowed push to protected branch %s in %-v and pr #%d is not ready to be merged: %s", ctx.opts.UserID, branchName, repo, pr.Index, err.Error())
 				ctx.JSON(http.StatusForbidden, private.Response{
diff --git a/services/pull/check.go b/services/pull/check.go
index f7747dfa2a..eb3b17d555 100644
--- a/services/pull/check.go
+++ b/services/pull/check.go
@@ -28,12 +28,12 @@ import (
 	asymkey_service "code.gitea.io/gitea/services/asymkey"
 )
 
-// prQueue represents a queue to handle update pull request tests
-var prQueue queue.UniqueQueue
+// prPatchCheckerQueue represents a queue to handle update pull request tests
+var prPatchCheckerQueue queue.UniqueQueue
 
 var (
-	ErrIsClosed              = errors.New("pull is cosed")
-	ErrUserNotAllowedToMerge = errors.New("user not allowed to merge")
+	ErrIsClosed              = errors.New("pull is closed")
+	ErrUserNotAllowedToMerge = models.ErrDisallowedToMerge{}
 	ErrHasMerged             = errors.New("has already been merged")
 	ErrIsWorkInProgress      = errors.New("work in progress PRs cannot be merged")
 	ErrIsChecking            = errors.New("cannot merge while conflict checking is in progress")
@@ -43,7 +43,7 @@ var (
 
 // AddToTaskQueue adds itself to pull request test task queue.
 func AddToTaskQueue(pr *models.PullRequest) {
-	err := prQueue.PushFunc(strconv.FormatInt(pr.ID, 10), func() error {
+	err := prPatchCheckerQueue.PushFunc(strconv.FormatInt(pr.ID, 10), func() error {
 		pr.Status = models.PullRequestStatusChecking
 		err := pr.UpdateColsIfNotMerged("status")
 		if err != nil {
@@ -93,13 +93,13 @@ func CheckPullMergable(ctx context.Context, doer *user_model.User, perm *models.
 		return ErrIsChecking
 	}
 
-	if err := CheckPRReadyToMerge(ctx, pr, false); err != nil {
+	if err := CheckPullBranchProtections(ctx, pr, false); err != nil {
 		if models.IsErrDisallowedToMerge(err) {
 			if force {
-				if isRepoAdmin, err := models.IsUserRepoAdmin(pr.BaseRepo, doer); err != nil {
-					return err
+				if isRepoAdmin, err2 := models.IsUserRepoAdmin(pr.BaseRepo, doer); err2 != nil {
+					return err2
 				} else if !isRepoAdmin {
-					return ErrUserNotAllowedToMerge
+					return err
 				}
 			}
 		} else {
@@ -144,7 +144,7 @@ func checkAndUpdateStatus(pr *models.PullRequest) {
 	}
 
 	// Make sure there is no waiting test to process before leaving the checking status.
-	has, err := prQueue.Has(strconv.FormatInt(pr.ID, 10))
+	has, err := prPatchCheckerQueue.Has(strconv.FormatInt(pr.ID, 10))
 	if err != nil {
 		log.Error("Unable to check if the queue is waiting to reprocess pr.ID %d. Error: %v", pr.ID, err)
 	}
@@ -293,7 +293,7 @@ func InitializePullRequests(ctx context.Context) {
 		case <-ctx.Done():
 			return
 		default:
-			if err := prQueue.PushFunc(strconv.FormatInt(prID, 10), func() error {
+			if err := prPatchCheckerQueue.PushFunc(strconv.FormatInt(prID, 10), func() error {
 				log.Trace("Adding PR ID: %d to the pull requests patch checking queue", prID)
 				return nil
 			}); err != nil {
@@ -358,13 +358,13 @@ func CheckPrsForBaseBranch(baseRepo *repo_model.Repository, baseBranchName strin
 
 // Init runs the task queue to test all the checking status pull requests
 func Init() error {
-	prQueue = queue.CreateUniqueQueue("pr_patch_checker", handle, "")
+	prPatchCheckerQueue = queue.CreateUniqueQueue("pr_patch_checker", handle, "")
 
-	if prQueue == nil {
+	if prPatchCheckerQueue == nil {
 		return fmt.Errorf("Unable to create pr_patch_checker Queue")
 	}
 
-	go graceful.GetManager().RunWithShutdownFns(prQueue.Run)
+	go graceful.GetManager().RunWithShutdownFns(prPatchCheckerQueue.Run)
 	go graceful.GetManager().RunWithShutdownContext(InitializePullRequests)
 	return nil
 }
diff --git a/services/pull/check_test.go b/services/pull/check_test.go
index 65bcb9c0e4..bc4c45ffad 100644
--- a/services/pull/check_test.go
+++ b/services/pull/check_test.go
@@ -41,7 +41,7 @@ func TestPullRequest_AddToTaskQueue(t *testing.T) {
 	queueShutdown := []func(){}
 	queueTerminate := []func(){}
 
-	prQueue = q.(queue.UniqueQueue)
+	prPatchCheckerQueue = q.(queue.UniqueQueue)
 
 	pr := unittest.AssertExistsAndLoadBean(t, &models.PullRequest{ID: 2}).(*models.PullRequest)
 	AddToTaskQueue(pr)
@@ -51,11 +51,11 @@ func TestPullRequest_AddToTaskQueue(t *testing.T) {
 		return pr.Status == models.PullRequestStatusChecking
 	}, 1*time.Second, 100*time.Millisecond)
 
-	has, err := prQueue.Has(strconv.FormatInt(pr.ID, 10))
+	has, err := prPatchCheckerQueue.Has(strconv.FormatInt(pr.ID, 10))
 	assert.True(t, has)
 	assert.NoError(t, err)
 
-	prQueue.Run(func(shutdown func()) {
+	prPatchCheckerQueue.Run(func(shutdown func()) {
 		queueShutdown = append(queueShutdown, shutdown)
 	}, func(terminate func()) {
 		queueTerminate = append(queueTerminate, terminate)
@@ -68,7 +68,7 @@ func TestPullRequest_AddToTaskQueue(t *testing.T) {
 		assert.Fail(t, "Timeout: nothing was added to pullRequestQueue")
 	}
 
-	has, err = prQueue.Has(strconv.FormatInt(pr.ID, 10))
+	has, err = prPatchCheckerQueue.Has(strconv.FormatInt(pr.ID, 10))
 	assert.False(t, has)
 	assert.NoError(t, err)
 
@@ -82,5 +82,5 @@ func TestPullRequest_AddToTaskQueue(t *testing.T) {
 		callback()
 	}
 
-	prQueue = nil
+	prPatchCheckerQueue = nil
 }
diff --git a/services/pull/merge.go b/services/pull/merge.go
index 7967bce6a9..330dffd5c7 100644
--- a/services/pull/merge.go
+++ b/services/pull/merge.go
@@ -662,8 +662,8 @@ func IsUserAllowedToMerge(pr *models.PullRequest, p models.Permission, user *use
 	return false, nil
 }
 
-// CheckPRReadyToMerge checks whether the PR is ready to be merged (reviews and status checks)
-func CheckPRReadyToMerge(ctx context.Context, pr *models.PullRequest, skipProtectedFilesCheck bool) (err error) {
+// CheckPullBranchProtections checks whether the PR is ready to be merged (reviews and status checks)
+func CheckPullBranchProtections(ctx context.Context, pr *models.PullRequest, skipProtectedFilesCheck bool) (err error) {
 	if err = pr.LoadBaseRepoCtx(ctx); err != nil {
 		return fmt.Errorf("LoadBaseRepo: %v", err)
 	}