add reference to build as a label on built images

pkg/build/builder/docker.go

@@ -323,11 +323,13 @@ func (d *DockerBuilder) buildLabels(sourceInfo *git.SourceInfo) []dockerfile.Key
 		sourceInfo.ContextDir = d.build.Spec.Source.ContextDir
 	}
 	labels = util.GenerateLabelsFromSourceInfo(labels, &sourceInfo.SourceInfo, api.DefaultDockerLabelNamespace)
+	addBuildLabels(labels, d.build)
+
 	kv := make([]dockerfile.KeyValue, 0, len(labels)+len(d.build.Spec.Output.ImageLabels))
 	for k, v := range labels {
 		kv = append(kv, dockerfile.KeyValue{Key: k, Value: v})
 	}
-	// override autogenerated labels
+	// override autogenerated labels with user provided labels
 	for _, lbl := range d.build.Spec.Output.ImageLabels {
 		kv = append(kv, dockerfile.KeyValue{Key: lbl.Name, Value: lbl.Value})
 	}

pkg/build/builder/docker_test.go

@@ -189,6 +189,8 @@ func TestDockerfilePath(t *testing.T) {
 		"\"io.openshift.build.commit.id\"=\"commitid\"",
 		"\"io.openshift.build.commit.ref\"=\"ref\"",
 		"\"io.openshift.build.commit.message\"=\"message\"",
+		"\"io.openshift.build.name\"=\"name\"",
+		"\"io.openshift.build.namespace\"=\"namespace\"",
 	}
 
 	for _, test := range tests {

pkg/build/builder/sti.go

@@ -365,6 +365,7 @@ func buildEnvVars(build *api.Build, sourceInfo *git.SourceInfo) s2iapi.Environme
 
 func buildLabels(build *api.Build) map[string]string {
 	labels := make(map[string]string)
+	addBuildLabels(labels, build)
 	for _, lbl := range build.Spec.Output.ImageLabels {
 		labels[lbl.Name] = lbl.Value
 	}

pkg/build/builder/sti_test.go

@@ -180,6 +180,10 @@ func TestBuildEnvVars(t *testing.T) {
 			Value: "http://test/insecure:8080",
 		},
 	}
+	expectedLabelList := map[string]string{
+		"io.openshift.build.name":      "openshift-test-1-build",
+		"io.openshift.build.namespace": "openshift-demo",
+	}
 
 	mockBuild := makeBuild()
 	mockBuild.Name = "openshift-test-1-build"
@@ -191,6 +195,12 @@ func TestBuildEnvVars(t *testing.T) {
 	if !reflect.DeepEqual(expectedEnvList, resultedEnvList) {
 		t.Errorf("Expected EnvironmentList to match: %#v, got %#v", expectedEnvList, resultedEnvList)
 	}
+
+	resultedLabelList := buildLabels(mockBuild)
+	if !reflect.DeepEqual(expectedLabelList, resultedLabelList) {
+		t.Errorf("Expected LabelList to match: %#v, got %#v", expectedLabelList, resultedLabelList)
+	}
+
 }
 
 func TestScriptProxyConfig(t *testing.T) {

pkg/build/builder/util.go

@@ -15,6 +15,8 @@ import (
 	docker "github.com/fsouza/go-dockerclient"
 
 	s2iapi "github.com/openshift/source-to-image/pkg/api"
+
+	buildapi "github.com/openshift/origin/pkg/build/api"
 )
 
 var (
@@ -192,3 +194,10 @@ func reportPushFailure(err error, authPresent bool, pushAuthConfig docker.AuthCo
 	}
 	return fmt.Errorf("Failed to push image: %v", err)
 }
+
+// addBuildLabels adds some common image labels describing the build that produced
+// this image.
+func addBuildLabels(labels map[string]string, build *buildapi.Build) {
+	labels[buildapi.DefaultDockerLabelNamespace+"build.name"] = build.Name
+	labels[buildapi.DefaultDockerLabelNamespace+"build.namespace"] = build.Namespace
+}