cli/compose/convert: split exported AddStackLabel from implementation

This function is currently only used within the package; create a non-exported
version of it, to make it clear it's not used elsewhere. This patch keeps
the exported function for now, but we can decide if we need to keep it
in future.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/compose/convert/compose.go

@@ -42,6 +42,11 @@ func NewNamespace(name string) Namespace {
 
 // AddStackLabel returns labels with the namespace label added
 func AddStackLabel(namespace Namespace, labels map[string]string) map[string]string {
+	return addStackLabel(namespace, labels)
+}
+
+// addStackLabel returns labels with the namespace label added
+func addStackLabel(namespace Namespace, labels map[string]string) map[string]string {
 	if labels == nil {
 		labels = make(map[string]string)
 	}
@@ -67,7 +72,7 @@ func Networks(namespace Namespace, networks networkMap, servicesNetworks map[str
 		}
 
 		createOpts := client.NetworkCreateOptions{
-			Labels:     AddStackLabel(namespace, nw.Labels),
+			Labels:     addStackLabel(namespace, nw.Labels),
 			Driver:     nw.Driver,
 			Options:    nw.DriverOpts,
 			Internal:   nw.Internal,
@@ -171,7 +176,7 @@ func driverObjectConfig(namespace Namespace, name string, obj composetypes.FileO
 	return swarmFileObject{
 		Annotations: swarm.Annotations{
 			Name:   name,
-			Labels: AddStackLabel(namespace, obj.Labels),
+			Labels: addStackLabel(namespace, obj.Labels),
 		},
 		Data: []byte{},
 	}
@@ -192,7 +197,7 @@ func fileObjectConfig(namespace Namespace, name string, obj composetypes.FileObj
 	return swarmFileObject{
 		Annotations: swarm.Annotations{
 			Name:   name,
-			Labels: AddStackLabel(namespace, obj.Labels),
+			Labels: addStackLabel(namespace, obj.Labels),
 		},
 		Data: data,
 	}, nil

cli/compose/convert/compose_test.go

@@ -30,7 +30,7 @@ func TestAddStackLabel(t *testing.T) {
 	labels := map[string]string{
 		"something": "labeled",
 	}
-	actual := AddStackLabel(Namespace{name: "foo"}, labels)
+	actual := addStackLabel(Namespace{name: "foo"}, labels)
 	expected := map[string]string{
 		"something":    "labeled",
 		LabelNamespace: "foo",

cli/compose/convert/service.go

@@ -119,7 +119,7 @@ func Service(
 	serviceSpec := swarm.ServiceSpec{
 		Annotations: swarm.Annotations{
 			Name:   name,
-			Labels: AddStackLabel(namespace, service.Deploy.Labels),
+			Labels: addStackLabel(namespace, service.Deploy.Labels),
 		},
 		TaskTemplate: swarm.TaskSpec{
 			ContainerSpec: &swarm.ContainerSpec{
@@ -131,7 +131,7 @@ func Service(
 				DNSConfig:       dnsConfig,
 				Healthcheck:     healthcheck,
 				Env:             convertEnvironment(service.Environment),
-				Labels:          AddStackLabel(namespace, service.Labels),
+				Labels:          addStackLabel(namespace, service.Labels),
 				Dir:             service.WorkingDir,
 				User:            service.User,
 				Mounts:          mounts,

cli/compose/convert/volume.go

@@ -80,7 +80,7 @@ func handleVolumeToMount(
 		return result, nil
 	}
 
-	result.VolumeOptions.Labels = AddStackLabel(namespace, stackVolume.Labels)
+	result.VolumeOptions.Labels = addStackLabel(namespace, stackVolume.Labels)
 	if stackVolume.Driver != "" || stackVolume.DriverOpts != nil {
 		result.VolumeOptions.DriverConfig = &mount.Driver{
 			Name:    stackVolume.Driver,