vendor/github.com/docker/cli/cli/command/registry/logout.go

   1 package registry
   2
   3 import (
   4         "fmt"
   5
   6         "golang.org/x/net/context"
   7
   8         "github.com/docker/cli/cli"
   9         "github.com/docker/cli/cli/command"
  10         "github.com/docker/docker/registry"
  11         "github.com/spf13/cobra"
  12 )
  13
  14 // NewLogoutCommand creates a new `docker logout` command
  15 func NewLogoutCommand(dockerCli command.Cli) *cobra.Command {
  16         cmd := &cobra.Command{
  17                 Use:   "logout [SERVER]",
  18                 Short: "Log out from a Docker registry",
  19                 Long:  "Log out from a Docker registry.\nIf no server is specified, the default is defined by the daemon.",
  20                 Args:  cli.RequiresMaxArgs(1),
  21                 RunE: func(cmd *cobra.Command, args []string) error {
  22                         var serverAddress string
  23                         if len(args) > 0 {
  24                                 serverAddress = args[0]
  25                         }
  26                         return runLogout(dockerCli, serverAddress)
  27                 },
  28         }
  29
  30         return cmd
  31 }
  32
  33 func runLogout(dockerCli command.Cli, serverAddress string) error {
  34         ctx := context.Background()
  35         var isDefaultRegistry bool
  36
  37         if serverAddress == "" {
  38                 serverAddress = command.ElectAuthServer(ctx, dockerCli)
  39                 isDefaultRegistry = true
  40         }
  41
  42         var (
  43                 loggedIn        bool
  44                 regsToLogout    []string
  45                 hostnameAddress = serverAddress
  46                 regsToTry       = []string{serverAddress}
  47         )
  48         if !isDefaultRegistry {
  49                 hostnameAddress = registry.ConvertToHostname(serverAddress)
  50                 // the tries below are kept for backward compatibility where a user could have
  51                 // saved the registry in one of the following format.
  52                 regsToTry = append(regsToTry, hostnameAddress, "http://"+hostnameAddress, "https://"+hostnameAddress)
  53         }
  54
  55         // check if we're logged in based on the records in the config file
  56         // which means it couldn't have user/pass cause they may be in the creds store
  57         for _, s := range regsToTry {
  58                 if _, ok := dockerCli.ConfigFile().AuthConfigs[s]; ok {
  59                         loggedIn = true
  60                         regsToLogout = append(regsToLogout, s)
  61                 }
  62         }
  63
  64         if !loggedIn {
  65                 fmt.Fprintf(dockerCli.Out(), "Not logged in to %s\n", hostnameAddress)
  66                 return nil
  67         }
  68
  69         fmt.Fprintf(dockerCli.Out(), "Removing login credentials for %s\n", hostnameAddress)
  70         for _, r := range regsToLogout {
  71                 if err := dockerCli.CredentialsStore(r).Erase(r); err != nil {
  72                         fmt.Fprintf(dockerCli.Err(), "WARNING: could not erase credentials: %v\n", err)
  73                 }
  74         }
  75
  76         return nil
  77 }