From e2b250fc47672eeffe38c51f20c08d5d51653c7a Mon Sep 17 00:00:00 2001
From: Fitz <a.fitzpatrick@efg.gg>
Date: Mon, 15 Apr 2024 14:49:49 +0100
Subject: [PATCH] if no pipeline found check for merge results pipeline

---
 pkg/controller/pipelines.go | 16 ++++++++++++++++
 pkg/schemas/ref.go          |  2 +-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/pkg/controller/pipelines.go b/pkg/controller/pipelines.go
index 81734343..95266cf8 100644
--- a/pkg/controller/pipelines.go
+++ b/pkg/controller/pipelines.go
@@ -53,6 +53,22 @@ func (c *Controller) PullRefMetrics(ctx context.Context, ref schemas.Ref) error
 		return fmt.Errorf("error fetching project pipelines for %s: %v", ref.Project.Name, err)
 	}
 
+	if len(pipelines) == 0 && ref.Kind == schemas.RefKindMergeRequest {
+		refName = fmt.Sprintf("refs/merge-requests/%s/merge", ref.Name)
+		pipelines, _, err = c.Gitlab.GetProjectPipelines(ctx, ref.Project.Name, &goGitlab.ListProjectPipelinesOptions{
+			// We only need the most recent pipeline
+			ListOptions: goGitlab.ListOptions{
+				PerPage: 1,
+				Page:    1,
+			},
+			Ref: &refName,
+		})
+
+		if err != nil {
+			return fmt.Errorf("error fetching project pipelines for %s: %v", ref.Project.Name, err)
+		}
+	}
+
 	if len(pipelines) == 0 {
 		log.WithFields(logFields).Debug("could not find any pipeline for the ref")
 
diff --git a/pkg/schemas/ref.go b/pkg/schemas/ref.go
index 8f403a86..17314103 100644
--- a/pkg/schemas/ref.go
+++ b/pkg/schemas/ref.go
@@ -10,7 +10,7 @@ import (
 )
 
 const (
-	mergeRequestRegexp string = `^((\d+)|refs/merge-requests/(\d+)/head)$`
+	mergeRequestRegexp string = `^((\d+)|refs/merge-requests/(\d+)/(?:head|merge))$`
 
 	// RefKindBranch refers to a branch.
 	RefKindBranch RefKind = "branch"