feat(matcher): skip ACL when .tekton dir absent

Reorder matchRepoPR to fetch .tekton templates before ACL checks.
When the .tekton directory is missing, the flow returns early
without triggering permission checks or posting unwarranted status
updates to the Git provider.

Split verifyRepoAndUser into setupRepo and checkUserAccess, and
extract fetchTektonTemplates from getPipelineRunsFromRepo. The
existing verifyRepoAndUser is kept as a thin wrapper for flows
that need setup + ACL without .tekton checks.

Signed-off-by: Akshay Pant <akpant@redhat.com>
Assisted-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: theakshaypant

pkg/pipelineascode/match.go

@@ -25,8 +25,8 @@ import (
 )
 
 func (p *PacRun) matchRepoPR(ctx context.Context) ([]matcher.Match, *v1alpha1.Repository, error) {
-	p.debugf("matchRepoPR: starting repo verification for url=%s", p.event.URL)
-	repo, err := p.verifyRepoAndUser(ctx)
+	p.debugf("matchRepoPR: starting repo setup for url=%s", p.event.URL)
+	repo, err := p.setupRepo(ctx)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -40,8 +40,24 @@ func (p *PacRun) matchRepoPR(ctx context.Context) ([]matcher.Match, *v1alpha1.Re
 		return nil, repo, p.cancelPipelineRunsOpsComment(ctx, repo)
 	}
 
+	rawTemplates, err := p.fetchTektonTemplates(ctx, repo)
+	if err != nil {
+		return nil, repo, err
+	}
+	if rawTemplates == "" {
+		return nil, repo, nil
+	}
+	allowed, err := p.checkUserAccess(ctx, repo)
+	if err != nil {
+		return nil, repo, err
+	}
+	if !allowed {
+		p.debugf("matchRepoPR: ACL check denied access")
+		return nil, repo, nil
+	}
+
 	p.debugf("matchRepoPR: fetching pipelineruns from repo=%s/%s", repo.GetNamespace(), repo.GetName())
-	matchedPRs, err := p.getPipelineRunsFromRepo(ctx, repo)
+	matchedPRs, err := p.getPipelineRunsFromRepo(ctx, repo, rawTemplates)
 	if err != nil {
 		return nil, repo, err
 	}
@@ -50,11 +66,11 @@ func (p *PacRun) matchRepoPR(ctx context.Context) ([]matcher.Match, *v1alpha1.Re
 	return matchedPRs, repo, nil
 }
 
-// verifyRepoAndUser verifies if the Repo CR exists for the Git Repository,
-// if the user has permission to run CI  and also initialise provider client.
-func (p *PacRun) verifyRepoAndUser(ctx context.Context) (*v1alpha1.Repository, error) {
+// setupRepo matches the Repository CR, sets up the authenticated provider client,
+// and fetches commit info. It does NOT perform ACL checks.
+func (p *PacRun) setupRepo(ctx context.Context) (*v1alpha1.Repository, error) {
 	// Match the Event URL to a Repository URL,
-	p.debugf("verifyRepoAndUser: matching repository for url=%s", p.event.URL)
+	p.debugf("setupRepo: matching repository for url=%s", p.event.URL)
 	repo, err := matcher.MatchEventURLRepo(ctx, p.run, p.event, "")
 	if err != nil {
 		return nil, fmt.Errorf("error matching Repository for event: %w", err)
@@ -65,13 +81,13 @@ func (p *PacRun) verifyRepoAndUser(ctx context.Context) (*v1alpha1.Repository, e
 		p.eventEmitter.EmitMessage(nil, zap.WarnLevel, "RepositoryNamespaceMatch", msg)
 		return nil, nil
 	}
-	p.debugf("verifyRepoAndUser: matched repo=%s/%s", repo.GetNamespace(), repo.GetName())
+	p.debugf("setupRepo: matched repo=%s/%s", repo.GetNamespace(), repo.GetName())
 
 	p.logger = p.logger.With("namespace", repo.Namespace)
 	p.vcx.SetLogger(p.logger)
 	p.eventEmitter.SetLogger(p.logger)
 
-	// Set up authenticated client with proper token scoping
+	// Set up authenticated client with proper token scoping.
 	// NOTE: This is typically already done in sinker.processEvent() for all event types,
 	// but we call it here as a safety net for edge cases (e.g., tests calling Run() directly,
 	// or if the early setup in sinker failed/was skipped). The call is idempotent.
@@ -80,21 +96,25 @@ func (p *PacRun) verifyRepoAndUser(ctx context.Context) (*v1alpha1.Repository, e
 	if err != nil {
 		return repo, err
 	}
-	p.debugf("verifyRepoAndUser: authenticated client setup complete")
+	p.debugf("setupRepo: authenticated client setup complete")
 
 	// Get the SHA commit info, we want to get the URL and commit title
 	if p.event.SHA == "" || p.event.SHATitle == "" || p.event.SHAURL == "" {
-		p.debugf("verifyRepoAndUser: fetching commit info")
+		p.debugf("setupRepo: fetching commit info")
 		if err = p.vcx.GetCommitInfo(ctx, p.event); err != nil {
 			return repo, fmt.Errorf("could not find commit info: %w", err)
 		}
-		p.debugf("verifyRepoAndUser: commit info loaded sha=%s title=%s", p.event.SHA, p.event.SHATitle)
+		p.debugf("setupRepo: commit info loaded sha=%s title=%s", p.event.SHA, p.event.SHATitle)
 	}
 
+	return repo, nil
+}
+
+func (p *PacRun) checkUserAccess(ctx context.Context, repo *v1alpha1.Repository) (bool, error) {
 	// Verify whether the sender of the GitOps command (e.g., /test) has the appropriate permissions to
 	// trigger CI on the repository, as any user is able to comment on a pushed commit in open-source repositories.
 	if p.event.TriggerTarget == triggertype.Push && opscomments.IsAnyOpsEventType(p.event.EventType) {
-		p.debugf("verifyRepoAndUser: checking access for gitops comment on push")
+		p.debugf("checkUserAccess: checking access for gitops comment on push")
 		status := providerstatus.StatusOpts{
 			Status:       CompletedStatus,
 			Title:        "Permission denied",
@@ -103,15 +123,15 @@ func (p *PacRun) verifyRepoAndUser(ctx context.Context) (*v1alpha1.Repository, e
 			AccessDenied: true,
 		}
 		if allowed, err := p.checkAccessOrError(ctx, repo, status, "by GitOps comment on push commit"); !allowed {
-			return nil, err
+			return false, err
 		}
 	}
 
 	// Check if the submitter is allowed to run this.
 	// on push we don't need to check the policy since the user has pushed to the repo so it has access to it.
 	// on comment we skip it for now, we are going to check later on
 	if p.event.TriggerTarget != triggertype.Push && p.event.EventType != opscomments.NoOpsCommentEventType.String() {
-		p.debugf("verifyRepoAndUser: checking access for trigger target=%s event_type=%s", p.event.TriggerTarget, p.event.EventType)
+		p.debugf("checkUserAccess: checking access for trigger target=%s event_type=%s", p.event.TriggerTarget, p.event.EventType)
 		status := providerstatus.StatusOpts{
 			Status:       queuedStatus,
 			Title:        "Pending approval, waiting for an /ok-to-test",
@@ -120,7 +140,7 @@ func (p *PacRun) verifyRepoAndUser(ctx context.Context) (*v1alpha1.Repository, e
 			AccessDenied: true,
 		}
 		if allowed, err := p.checkAccessOrError(ctx, repo, status, "via "+p.event.TriggerTarget.String()); !allowed {
-			return nil, err
+			return false, err
 		}
 		// When /ok-to-test is approved, update the parent "Pipelines as Code CI" status to success
 		// to indicate the approval was successful before pipelines start running.
@@ -136,16 +156,15 @@ func (p *PacRun) verifyRepoAndUser(ctx context.Context) (*v1alpha1.Repository, e
 			}
 		}
 	}
-	return repo, nil
+	return true, nil
 }
 
-// getPipelineRunsFromRepo fetches pipelineruns from git repository and prepare them for creation.
-func (p *PacRun) getPipelineRunsFromRepo(ctx context.Context, repo *v1alpha1.Repository) ([]matcher.Match, error) {
+func (p *PacRun) fetchTektonTemplates(ctx context.Context, repo *v1alpha1.Repository) (string, error) {
 	provenance := "source"
 	if repo.Spec.Settings != nil && repo.Spec.Settings.PipelineRunProvenance != "" {
 		provenance = repo.Spec.Settings.PipelineRunProvenance
 	}
-	p.debugf("getPipelineRunsFromRepo: repo=%s/%s provenance=%s", repo.GetNamespace(), repo.GetName(), provenance)
+	p.debugf("fetchTektonTemplates: repo=%s/%s provenance=%s", repo.GetNamespace(), repo.GetName(), provenance)
 	rawTemplates, err := p.vcx.GetTektonDir(ctx, p.event, tektonDir, provenance)
 	if err != nil && p.event.TriggerTarget == triggertype.PullRequest && strings.Contains(err.Error(), "error unmarshalling yaml file") {
 		// make the error a bit more friendly for users who don't know what marshalling or intricacies of the yaml parser works
@@ -163,16 +182,16 @@ func (p *PacRun) getPipelineRunsFromRepo(ctx context.Context, repo *v1alpha1.Rep
 					},
 				},
 			)
-			return nil, nil
+			return "", nil
 		}
 
-		return nil, err
+		return "", err
 	}
 
 	if err != nil {
-		p.debugf("getPipelineRunsFromRepo: GetTektonDir returned error: %v", err)
+		p.debugf("fetchTektonTemplates: GetTektonDir returned error: %v", err)
 	} else {
-		p.debugf("getPipelineRunsFromRepo: fetched templates length=%d", len(rawTemplates))
+		p.debugf("fetchTektonTemplates: fetched templates length=%d", len(rawTemplates))
 	}
 
 	if rawTemplates == "" && p.event.EventType == opscomments.OkToTestCommentEventType.String() {
@@ -198,8 +217,35 @@ func (p *PacRun) getPipelineRunsFromRepo(ctx context.Context, repo *v1alpha1.Rep
 			msg = fmt.Sprintf("cannot locate templates in %s/ directory for this repository in %s", tektonDir, p.event.HeadBranch)
 		}
 		p.eventEmitter.EmitMessage(nil, logLevel, reason, msg)
+		return "", nil
+	}
+
+	return rawTemplates, nil
+}
+
+// verifyRepoAndUser verifies if the Repo CR exists for the Git Repository,
+// if the user has permission to run CI and also initialise provider client.
+func (p *PacRun) verifyRepoAndUser(ctx context.Context) (*v1alpha1.Repository, error) {
+	repo, err := p.setupRepo(ctx)
+	if err != nil {
+		return repo, err
+	}
+	if repo == nil {
 		return nil, nil
 	}
+	allowed, err := p.checkUserAccess(ctx, repo)
+	if err != nil {
+		return nil, err
+	}
+	if !allowed {
+		return nil, nil
+	}
+	return repo, nil
+}
+
+// getPipelineRunsFromRepo processes pre-fetched .tekton templates and prepares PipelineRuns for creation.
+func (p *PacRun) getPipelineRunsFromRepo(ctx context.Context, repo *v1alpha1.Repository, rawTemplates string) ([]matcher.Match, error) {
+	p.debugf("getPipelineRunsFromRepo: repo=%s/%s templates_length=%d", repo.GetNamespace(), repo.GetName(), len(rawTemplates))
 
 	// check for condition if need update the pipelinerun with regexp from the
 	// "raw" pipelinerun string