DockerCLI/command/registry/logout.go

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package registry
import (
"fmt"
"golang.org/x/net/context"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/docker/docker/registry"
"github.com/spf13/cobra"
)
// NewLogoutCommand creates a new `docker login` command
func NewLogoutCommand(dockerCli *command.DockerCli) *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.DockerCli, 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.CredentialsStore().Erase(r); err != nil {
fmt.Fprintf(dockerCli.Err(), "WARNING: could not erase credentials: %v\n", err)
}
}
return nil
}