class Rails::Generators::Actions::CreateMigration

def on_conflict_behavior # :doc:
  options = base.options.merge(config)
  if identical?
    say_status :identical, :blue, relative_existing_migration
  elsif options[:force]
    say_status :remove, :green, relative_existing_migration
    say_status :create, :green
    unless pretend?
      ::FileUtils.rm_rf(existing_migration)
      yield
    end
  elsif options[:skip]
    say_status :skip, :yellow
  else
    say_status :conflict, :red
    raise Error, "Another migration is already named #{migration_file_name}: " \
      "#{existing_migration}. Use --force to replace this migration " \
      "or --skip to ignore conflicted file."
  end
end