DockerCLI/cli/command/stack/list.go

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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
}