feat(compose): plan compose deployment

internal/compose/port.go

@@ -12,23 +12,21 @@ type PortsSource []string
 
 // TransformServicesPortsExtension transforms the ports extension of all services in the project by replacing a string
 // representation of each port with a parsed PortSpec.
-func transformServicesPortsExtension(project *types.Project) error {
-	for name, service := range project.Services {
+func transformServicesPortsExtension(project *types.Project) (*types.Project, error) {
+	return project.WithServicesTransform(func(name string, service types.ServiceConfig) (types.ServiceConfig, error) {
 		ports, ok := service.Extensions[PortsExtensionKey].(PortsSource)
 		if !ok {
-			continue
+			return service, nil
 		}
 
 		specs, err := transformPortsExtension(ports)
 		if err != nil {
-			return err
+			return service, err
 		}
 
 		service.Extensions[PortsExtensionKey] = specs
-		project.Services[name] = service
-	}
-
-	return nil
+		return service, nil
+	})
 }
 
 func transformPortsExtension(ports PortsSource) ([]api.PortSpec, error) {