package registry import ( "fmt" "golang.org/x/net/context" "github.com/docker/cli/cli" "github.com/docker/cli/cli/command" "github.com/docker/docker/registry" "github.com/spf13/cobra" ) // NewLogoutCommand creates a new `docker logout` command func NewLogoutCommand(dockerCli command.Cli) *cobra.Command { cmd := &cobra.Command{ Use: "logout [SERVER]", Short: "Log out from a Docker registry", Long: "Log out from a Docker registry.\nIf no server is specified, the default is defined by the daemon.", Args: cli.RequiresMaxArgs(1), RunE: func(cmd *cobra.Command, args []string) error { var serverAddress string if len(args) > 0 { serverAddress = args[0] } return runLogout(dockerCli, serverAddress) }, } return cmd } func runLogout(dockerCli command.Cli, serverAddress string) error { ctx := context.Background() var isDefaultRegistry bool if serverAddress == "" { serverAddress = command.ElectAuthServer(ctx, dockerCli) isDefaultRegistry = true } var ( loggedIn bool regsToLogout []string hostnameAddress = serverAddress regsToTry = []string{serverAddress} ) if !isDefaultRegistry { hostnameAddress = registry.ConvertToHostname(serverAddress) // the tries below are kept for backward compatibility where a user could have // saved the registry in one of the following format. regsToTry = append(regsToTry, hostnameAddress, "http://"+hostnameAddress, "https://"+hostnameAddress) } // check if we're logged in based on the records in the config file // which means it couldn't have user/pass cause they may be in the creds store for _, s := range regsToTry { if _, ok := dockerCli.ConfigFile().AuthConfigs[s]; ok { loggedIn = true regsToLogout = append(regsToLogout, s) } } if !loggedIn { fmt.Fprintf(dockerCli.Out(), "Not logged in to %s\n", hostnameAddress) return nil } fmt.Fprintf(dockerCli.Out(), "Removing login credentials for %s\n", hostnameAddress) for _, r := range regsToLogout { if err := dockerCli.ConfigFile().GetCredentialsStore(r).Erase(r); err != nil { fmt.Fprintf(dockerCli.Err(), "WARNING: could not erase credentials: %v\n", err) } } return nil }