DockerCLI/cli/command/service/ps.go

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package service
import (
"context"
"strings"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/idresolver"
"github.com/docker/cli/cli/command/node"
"github.com/docker/cli/cli/command/task"
"github.com/docker/cli/opts"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/client"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
type psOptions struct {
services []string
quiet bool
noResolve bool
noTrunc bool
format string
filter opts.FilterOpt
}
func newPsCommand(dockerCli command.Cli) *cobra.Command {
options := psOptions{filter: opts.NewFilterOpt()}
cmd := &cobra.Command{
Use: "ps [OPTIONS] SERVICE [SERVICE...]",
Short: "List the tasks of one or more services",
Args: cli.RequiresMinArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
options.services = args
return runPS(dockerCli, options)
},
}
flags := cmd.Flags()
flags.BoolVarP(&options.quiet, "quiet", "q", false, "Only display task IDs")
flags.BoolVar(&options.noTrunc, "no-trunc", false, "Do not truncate output")
flags.BoolVar(&options.noResolve, "no-resolve", false, "Do not map IDs to Names")
flags.StringVar(&options.format, "format", "", "Pretty-print tasks using a Go template")
flags.VarP(&options.filter, "filter", "f", "Filter output based on conditions provided")
return cmd
}
func runPS(dockerCli command.Cli, options psOptions) error {
client := dockerCli.Client()
ctx := context.Background()
filter, notfound, err := createFilter(ctx, client, options)
if err != nil {
return err
}
if err := updateNodeFilter(ctx, client, filter); err != nil {
return err
}
tasks, err := client.TaskList(ctx, types.TaskListOptions{Filters: filter})
if err != nil {
return err
}
format := options.format
if len(format) == 0 {
format = task.DefaultFormat(dockerCli.ConfigFile(), options.quiet)
}
if options.quiet {
options.noTrunc = true
}
if err := task.Print(ctx, dockerCli, tasks, idresolver.New(client, options.noResolve), !options.noTrunc, options.quiet, format); err != nil {
return err
}
if len(notfound) != 0 {
return errors.New(strings.Join(notfound, "\n"))
}
return nil
}
func createFilter(ctx context.Context, client client.APIClient, options psOptions) (filters.Args, []string, error) {
filter := options.filter.Value()
serviceIDFilter := filters.NewArgs()
serviceNameFilter := filters.NewArgs()
for _, service := range options.services {
serviceIDFilter.Add("id", service)
serviceNameFilter.Add("name", service)
}
serviceByIDList, err := client.ServiceList(ctx, types.ServiceListOptions{Filters: serviceIDFilter})
if err != nil {
return filter, nil, err
}
serviceByNameList, err := client.ServiceList(ctx, types.ServiceListOptions{Filters: serviceNameFilter})
if err != nil {
return filter, nil, err
}
var notfound []string
serviceCount := 0
loop:
// Match services by 1. Full ID, 2. Full name, 3. ID prefix. An error is returned if the ID-prefix match is ambiguous
for _, service := range options.services {
for _, s := range serviceByIDList {
if s.ID == service {
filter.Add("service", s.ID)
serviceCount++
continue loop
}
}
for _, s := range serviceByNameList {
if s.Spec.Annotations.Name == service {
filter.Add("service", s.ID)
serviceCount++
continue loop
}
}
found := false
for _, s := range serviceByIDList {
if strings.HasPrefix(s.ID, service) {
if found {
return filter, nil, errors.New("multiple services found with provided prefix: " + service)
}
filter.Add("service", s.ID)
serviceCount++
found = true
}
}
if !found {
notfound = append(notfound, "no such service: "+service)
}
}
if serviceCount == 0 {
return filter, nil, errors.New(strings.Join(notfound, "\n"))
}
return filter, notfound, err
}
func updateNodeFilter(ctx context.Context, client client.APIClient, filter filters.Args) error {
if filter.Contains("node") {
nodeFilters := filter.Get("node")
for _, nodeFilter := range nodeFilters {
nodeReference, err := node.Reference(ctx, client, nodeFilter)
if err != nil {
return err
}
filter.Del("node", nodeFilter)
filter.Add("node", nodeReference)
}
}
return nil
}