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moby--moby/cli/command/stack/list.go
Kenfe-Mickael Laventure 7781a1bf0f Make experimental a runtime flag
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
2016-10-24 15:20:01 -07:00

117 lines
2.2 KiB
Go

package stack
import (
"fmt"
"io"
"strconv"
"text/tabwriter"
"golang.org/x/net/context"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"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) {
filter := filters.NewArgs()
filter.Add("label", labelNamespace)
services, err := apiclient.ServiceList(
ctx,
types.ServiceListOptions{Filter: filter})
if err != nil {
return nil, err
}
m := make(map[string]*stack, 0)
for _, service := range services {
labels := service.Spec.Labels
name, ok := labels[labelNamespace]
if !ok {
return nil, fmt.Errorf("cannot get label %s for service %s",
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
}