github.com/kunnos/engine@v1.13.1/cli/command/registry/logout.go (about)

     1  package registry
     2  
     3  import (
     4  	"fmt"
     5  
     6  	"golang.org/x/net/context"
     7  
     8  	"github.com/docker/docker/cli"
     9  	"github.com/docker/docker/cli/command"
    10  	"github.com/docker/docker/registry"
    11  	"github.com/spf13/cobra"
    12  )
    13  
    14  // NewLogoutCommand creates a new `docker login` command
    15  func NewLogoutCommand(dockerCli *command.DockerCli) *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.DockerCli, 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  }