func runLogout(dockerCli *command.DockerCli, serverAddress string) error {
ctx := context.Background()
var isDefaultRegistry bool
if serverAddress == "" {
serverAddress = dockerCli.ElectAuthServer(ctx)
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 compatibily 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 := command.EraseCredentials(dockerCli.ConfigFile(), r); err != nil {
fmt.Fprintf(dockerCli.Err(), "WARNING: could not erase credentials: %v\n", err)
}
}
return nil
}