package stack import ( "sort" "github.com/docker/cli/cli" "github.com/docker/cli/cli/command" "github.com/docker/cli/cli/command/formatter" "github.com/docker/cli/cli/compose/convert" "github.com/docker/docker/api/types" "github.com/docker/docker/client" "github.com/pkg/errors" "github.com/spf13/cobra" "golang.org/x/net/context" ) type listOptions struct { format string } func newListCommand(dockerCli command.Cli) *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) }, } flags := cmd.Flags() flags.StringVar(&opts.format, "format", "", "Pretty-print stacks using a Go template") return cmd } func runList(dockerCli command.Cli, opts listOptions) error { client := dockerCli.Client() ctx := context.Background() stacks, err := getStacks(ctx, client) if err != nil { return err } format := opts.format if len(format) == 0 { format = formatter.TableFormatKey } stackCtx := formatter.Context{ Output: dockerCli.Out(), Format: formatter.NewStackFormat(format), } sort.Sort(byName(stacks)) return formatter.StackWrite(stackCtx, stacks) } type byName []*formatter.Stack func (n byName) Len() int { return len(n) } func (n byName) Swap(i, j int) { n[i], n[j] = n[j], n[i] } func (n byName) Less(i, j int) bool { return n[i].Name < n[j].Name } func getStacks(ctx context.Context, apiclient client.APIClient) ([]*formatter.Stack, error) { services, err := apiclient.ServiceList( ctx, types.ServiceListOptions{Filters: getAllStacksFilter()}) if err != nil { return nil, err } m := make(map[string]*formatter.Stack) for _, service := range services { labels := service.Spec.Labels name, ok := labels[convert.LabelNamespace] if !ok { return nil, errors.Errorf("cannot get label %s for service %s", convert.LabelNamespace, service.ID) } ztack, ok := m[name] if !ok { m[name] = &formatter.Stack{ Name: name, Services: 1, } } else { ztack.Services++ } } var stacks []*formatter.Stack for _, stack := range m { stacks = append(stacks, stack) } return stacks, nil }