| package stack |
| |
| import ( |
| "fmt" |
| "io" |
| "strconv" |
| "text/tabwriter" |
| |
| "golang.org/x/net/context" |
| |
| "github.com/docker/docker/api/types" |
| "github.com/docker/docker/cli" |
| "github.com/docker/docker/cli/command" |
| "github.com/docker/docker/cli/compose/convert" |
| "github.com/docker/docker/client" |
| "github.com/spf13/cobra" |
| ) |
| |
| const ( |
| listItemFmt = "%s\t%s\n" |
| ) |
| |
| type listOptions struct { |
| } |
| |
| func newListCommand(dockerCli *command.DockerCli) *cobra.Command { |
| opts := listOptions{} |
| |
| cmd := &cobra.Command{ |
| Use: "ls", |
| Aliases: []string{"list"}, |
| Short: "List stacks", |
| Args: cli.NoArgs, |
| RunE: func(cmd *cobra.Command, args []string) error { |
| return runList(dockerCli, opts) |
| }, |
| } |
| |
| return cmd |
| } |
| |
| func runList(dockerCli *command.DockerCli, opts listOptions) error { |
| client := dockerCli.Client() |
| ctx := context.Background() |
| |
| stacks, err := getStacks(ctx, client) |
| if err != nil { |
| return err |
| } |
| |
| out := dockerCli.Out() |
| printTable(out, stacks) |
| return nil |
| } |
| |
| func printTable(out io.Writer, stacks []*stack) { |
| writer := tabwriter.NewWriter(out, 0, 4, 2, ' ', 0) |
| |
| // Ignore flushing errors |
| defer writer.Flush() |
| |
| fmt.Fprintf(writer, listItemFmt, "NAME", "SERVICES") |
| for _, stack := range stacks { |
| fmt.Fprintf( |
| writer, |
| listItemFmt, |
| stack.Name, |
| strconv.Itoa(stack.Services), |
| ) |
| } |
| } |
| |
| type stack struct { |
| // Name is the name of the stack |
| Name string |
| // Services is the number of the services |
| Services int |
| } |
| |
| func getStacks( |
| ctx context.Context, |
| apiclient client.APIClient, |
| ) ([]*stack, error) { |
| services, err := apiclient.ServiceList( |
| ctx, |
| types.ServiceListOptions{Filters: getAllStacksFilter()}) |
| if err != nil { |
| return nil, err |
| } |
| m := make(map[string]*stack, 0) |
| for _, service := range services { |
| labels := service.Spec.Labels |
| name, ok := labels[convert.LabelNamespace] |
| if !ok { |
| return nil, fmt.Errorf("cannot get label %s for service %s", |
| convert.LabelNamespace, service.ID) |
| } |
| ztack, ok := m[name] |
| if !ok { |
| m[name] = &stack{ |
| Name: name, |
| Services: 1, |
| } |
| } else { |
| ztack.Services++ |
| } |
| } |
| var stacks []*stack |
| for _, stack := range m { |
| stacks = append(stacks, stack) |
| } |
| return stacks, nil |
| } |