Function pruneServices

cli/command/stack/deploy.go:113–128

pruneServices removes services that are no longer referenced in the source

(ctx context.Context, dockerCLI command.Cli, namespace convert.Namespace, services map[string]struct{})

// pruneServices removes services that are no longer referenced in the source
func pruneServices(ctx context.Context, dockerCLI command.Cli, namespace convert.Namespace, services map[string]struct{}) {
	apiClient := dockerCLI.Client()

	oldServices, err := getStackServices(ctx, apiClient, namespace.Name())
	if err != nil {
		_, _ = fmt.Fprintln(dockerCLI.Err(), "Failed to list services:", err)
	}

	toRemove := make([]swarm.Service, 0, len(oldServices.Items))
	for _, service := range oldServices.Items {
		if _, exists := services[namespace.Descope(service.Spec.Name)]; !exists {
			toRemove = append(toRemove, service)
		}
	}
	removeServices(ctx, dockerCLI, toRemove)
}