brew/Library/Homebrew/cask/lib/hbc/cli/outdated.rb

module Hbc
  class CLI
    class Outdated < AbstractCommand
      def initialize(*args)
        @cask_tokens = self.class.cask_tokens_from(args)

        @greedy  = args.include?("--greedy")
        @verbose = ($stdout.tty? || CLI.verbose?) && !args.include?("--quiet")
      end

      def run
        casks_to_check = if @cask_tokens.empty?
          Hbc.installed
        else
          @cask_tokens.map(&CaskLoader.public_method(:load))
        end

        casks_to_check.each do |cask|
          odebug "Checking update info of Cask #{cask}"
          self.class.list_if_outdated(cask, @greedy, @verbose)
        end
      end

      def self.list_if_outdated(cask, greedy, verbose)
        return unless cask.outdated?(greedy)

        if verbose
          outdated_versions = cask.outdated_versions(greedy)
          outdated_info   = "#{cask.token} (#{outdated_versions.join(", ")})"
          current_version = cask.version.to_s
          puts "#{outdated_info} != #{current_version}"
        else
          puts cask.token
        end
      end

      def self.help
        "list the outdated installed Casks"
      end
    end
  end
end