Gem::Commands::SignoutCommand#execute

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/commands/signout_command.rb, line 22
def execute
  credentials_path = Gem.configuration.credentials_path
  credentials_file_exists = File.exist?(credentials_path)

  if !credentials_file_exists && !Gem.configuration.credential_store
    alert_error "You are not currently signed in."
    return
  end

  # An unwritable file must not leave the stored keys behind, so each half
  # reports its own outcome.
  store_cleared, file_removed = Gem.configuration.unset_api_key!

  unremoved = []
  unremoved << "the credential store" unless store_cleared
  unremoved << "'#{credentials_path}'" if credentials_file_exists && !file_removed

  unless unremoved.empty?
    alert_error "Could not remove the credentials from #{unremoved.join(" and ")}." \
                " They are still there. Check that the file and its directory are writable," \
                " or remove them yourself to finish signing out."
    terminate_interaction 1
  end

  if Gem.configuration.credential_store
    say "You have successfully signed out of every registry, including RubyGems.org."
  else
    say "You have successfully signed out from all sessions."
  end
end