Add the git resource ref to the ResourceResult for git resources.

This includes the full name of the git resource in the resource result for
git resources. We pass this along in the environment variable already, this
includes it back in the resource result so we can tie the commit sha and
branch name in the result.

Right now Task results contain the exact commit that was cloned from any git
resource inputs, but the "resourceref" field is empty. That makes it hard to
tell which repo was cloned after. In the case of multiple inputs, there is
no way to tell which result corresponds to which.

cmd/git-init/main.go

@@ -17,8 +17,10 @@ package main
 
 import (
 	"flag"
+	"os"
 
 	v1alpha1 "github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
 	"github.com/tektoncd/pipeline/pkg/git"
 	"github.com/tektoncd/pipeline/pkg/termination"
 	"go.uber.org/zap"
@@ -61,10 +63,14 @@ func main() {
 	if err != nil {
 		logger.Fatalf("Error parsing commit of git repository: %s", err)
 	}
+	resourceName := os.Getenv("TEKTON_RESOURCE_NAME")
 	output := []v1alpha1.PipelineResourceResult{
 		{
 			Key:   "commit",
 			Value: commit,
+			ResourceRef: v1beta1.PipelineResourceRef{
+				Name: resourceName,
+			},
 		},
 	}
 

go.mod

@@ -4,6 +4,7 @@ go 1.13
 
 require (
 	cloud.google.com/go v0.47.0 // indirect
+	cloud.google.com/go/storage v1.0.0
 	contrib.go.opencensus.io/exporter/stackdriver v0.12.8 // indirect
 	github.com/GoogleCloudPlatform/cloud-builders/gcs-fetcher v0.0.0-20191203181535-308b93ad1f39
 	github.com/cloudevents/sdk-go/v2 v2.0.0-preview6
@@ -42,6 +43,7 @@ require (
 	golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
 	golang.org/x/tools v0.0.0-20200214144324-88be01311a71 // indirect
 	gomodules.xyz/jsonpatch/v2 v2.1.0 // indirect
+	google.golang.org/api v0.15.0
 	google.golang.org/appengine v1.6.5 // indirect
 	k8s.io/api v0.17.3
 	k8s.io/apiextensions-apiserver v0.17.3 // indirect

test/kaniko_task_test.go

@@ -98,6 +98,10 @@ func TestKanikoTaskRun(t *testing.T) {
 		case "commit":
 			commit = rr.Value
 		}
+		// Every resource should have a ref with a name
+		if rr.ResourceRef.Name == "" {
+			t.Errorf("Resource ref not set for %v in TaskRun: %v", rr, tr)
+		}
 	}
 	if digest == "" {
 		t.Errorf("Digest not found in TaskRun.Status: %v", tr.Status)