introduce ability to select service to be stopped by compose down

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

pkg/api/api.go

@@ -232,6 +232,8 @@ type DownOptions struct {
 	Images string
 	// Volumes remove volumes, both declared in the `volumes` section and anonymous ones
 	Volumes bool
+	// Services passed in the command line to be stopped
+	Services []string
 }
 
 // ConfigOptions group options of the Config API

pkg/compose/down.go

@@ -44,7 +44,7 @@ func (s *composeService) Down(ctx context.Context, projectName string, options a
 	}, s.stdinfo())
 }
 
-func (s *composeService) down(ctx context.Context, projectName string, options api.DownOptions) error {
+func (s *composeService) down(ctx context.Context, projectName string, options api.DownOptions) error { //golint:nocyclo
 	w := progress.ContextWriter(ctx)
 	resourceToRemove := false
 
@@ -70,6 +70,9 @@ func (s *composeService) down(ctx context.Context, projectName string, options a
 	}
 
 	err = InReverseDependencyOrder(ctx, project, func(c context.Context, service string) error {
+		if len(options.Services) > 0 && !utils.StringContains(options.Services, service) {
+			return nil
+		}
 		serviceContainers := containers.filter(isService(service))
 		err := s.removeContainers(ctx, w, serviceContainers, options.Timeout, options.Volumes)
 		return err

pkg/e2e/compose_test.go

@@ -102,6 +102,14 @@ func TestLocalComposeUp(t *testing.T) {
 		res.Assert(t, icmd.Expected{Out: `compose-e2e-demo-words-1   gtardif/sentences-api   latest`})
 	})
 
+	t.Run("down SERVICE", func(t *testing.T) {
+		_ = c.RunDockerComposeCmd(t, "--project-name", projectName, "down", "web")
+
+		res := c.RunDockerComposeCmd(t, "--project-name", projectName, "ps")
+		assert.Assert(t, !strings.Contains(res.Combined(), "compose-e2e-demo-web-1"), res.Combined())
+		assert.Assert(t, strings.Contains(res.Combined(), "compose-e2e-demo-db-1"), res.Combined())
+	})
+
 	t.Run("down", func(t *testing.T) {
 		_ = c.RunDockerComposeCmd(t, "--project-name", projectName, "down")
 	})

pkg/progress/event.go

@@ -153,6 +153,15 @@ func RemovedEvent(id string) Event {
 	return NewEvent(id, Done, "Removed")
 }
 
+// SkippedEvent creates a new Skipped Event
+func SkippedEvent(id string, reason string) Event {
+	return Event{
+		ID:         id,
+		Status:     Warning,
+		StatusText: "Skipped: " + reason,
+	}
+}
+
 // NewEvent new event
 func NewEvent(id string, status EventStatus, statusText string) Event {
 	return Event{