gitlab-org--gitlab-foss/app/uploaders/favicon_uploader.rb

class FaviconUploader < AttachmentUploader
  EXTENSION_WHITELIST = %w[png ico].freeze

  def extension_whitelist
    EXTENSION_WHITELIST
  end

  private

  def filename_for_different_format(filename, format)
    filename.chomp(File.extname(filename)) + ".#{format}"
  end
end