Class: Ziltoid::CommandParser

Inherits:
Object
  • Object
show all
Defined in:
lib/ziltoid/command_parser.rb

Constant Summary collapse

ALLOWED_COMMANDS = 
["watch", "start", "stop", "restart"]

Class Method Summary collapse

Class Method Details

.parse(args) ⇒ Object

Returns a structure describing the options.



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# File 'lib/ziltoid/command_parser.rb', line 10

def self.parse(args)
  runnable = OpenStruct.new

  helptext = "    Available commands are :\n       watch :       watches all processes\n       start :       starts all processes\n       stop  :       stops all processes\n       restart :     restarts all processes\n  HELP\n\n  opt_parser = OptionParser.new do |opts|\n    # Printing generic help at the top of commands summary\n    opts.banner = \"Usage: ziltoid.rb [options]\"\n    opts.separator \"\"\n    opts.separator helptext\n    opts.separator \"\"\n    opts.separator \"Common options :\"\n\n    # No argument, shows at tail. This will print a commands summary.\n    opts.on_tail(\"-h\", \"--help\", \"Show this message\") do\n      puts opts\n      exit\n    end\n  end\n\n  # Retrieves all arguments except option-like ones (e.g. '-h' or '-v')\n  opt_parser.parse!(args)\n  # Fetches the first argument as the intended command\n  command = args.shift\n\n  # Making sure the command is valid, otherwise print commands summary\n  if command && ALLOWED_COMMANDS.include?(command)\n    runnable.command = command\n  else\n    puts opt_parser.help\n    exit\n  end\n\n  runnable\nend\n"