namespace :gitlab do

  # Runs the given command and matches the output agains the given pattern
  #
  # Returns nil if nothing matched
  # Retunrs the MatchData if the pattern matched
  #
  # see also #run
  # see also String#match
  def run_and_match(command, regexp)
    run(command).try(:match, regexp)
  end

  # Runs the given command
  #
  # Returns nil if the command was not found
  # Returns the output of the command otherwise
  #
  # see also #run_and_match
  def run(command)
    unless `#{command} 2>/dev/null`.blank?
      `#{command}`
    end
  end

  def warn_user_is_not_gitlab
    unless @warned_user_not_gitlab
      current_user = run("whoami").chomp
      unless current_user == "gitlab"
        puts "#{Colored.color(:black)+Colored.color(:on_yellow)} Warning #{Colored.extra(:clear)}"
        puts "  You are running as user #{current_user.magenta}, we hope you know what you are doing."
        puts "  Things may work\/fail for the wrong reasons."
        puts "  For correct results you should run this as user #{"gitlab".magenta}."
        puts ""
      end
      @warned_user_not_gitlab = true
    end
  end
end