homebrew-cask-versions/lib/cask/cli/info.rb

class Cask::CLI::Info
  def self.run(*cask_names)
    raise CaskUnspecifiedError if cask_names.empty?
    cask_names.each do |cask_name|
      odebug "Getting info for Cask #{cask_name}"
      cask = Cask.load(cask_name)
      puts info(cask)
      Cask::Installer.print_caveats(cask)
    end
  end

  def self.help
    "displays information about the cask of the given name"
  end

  def self.info(cask)
    installation = if cask.installed?
                     "#{cask.destination_path} (#{cask.destination_path.cabv})"
                   else
                     "Not installed"
                   end

    <<-PURPOSE
#{cask}: #{cask.version}
#{cask.homepage}
#{installation}
#{github_info(cask)}
#{artifact_info(cask)}
PURPOSE
  end

  def self.github_info(cask)
    tap = cask.title
    tap = cask.class.all_titles.grep(/#{tap}$/).first unless tap =~ /\//
    tap, name = tap.split "/"
    user, repo = tap.split "-"
    "https://github.com/#{user}/homebrew-#{repo}/commits/master/Casks/#{name}.rb"
  end

  def self.artifact_info(cask)
    retval = ''
    Cask::DSL::ClassMethods.ordinary_artifact_types.each do |type|
      if cask.artifacts[type].length > 0
        retval = "#{Tty.blue}==>#{Tty.white} Contents#{Tty.reset}\n" unless retval.length > 0
        cask.artifacts[type].each do |artifact|
          retval.concat "  #{artifact.first} (#{type.to_s})\n"
        end
      end
    end
    retval.sub!(/\n\Z/, '')
  end
end