Module: UN

# File 'lib/un.rb', line 414

def help(argv, output: $stdout)
  all = argv.empty?
  cmd = nil
  if all
    store = proc {|msg| output << msg}
  else
    messages = {}
    store = proc {|msg| messages[cmd] = msg}
  end
  open(__FILE__) do |me|
    while me.gets("##\n")
      if help = me.gets("\n\n")
        if all or argv.include?(cmd = help[/^#\s*ruby\s.*-e\s(\w)/, 1])
          store[help.gsub(/^# ?/, "")]
          break unless all or argv.size > messages.size
        end
      end
    end
  end
  if messages
    argv.each {|arg| output << messages[arg]}
  end
end