Class: Kerplutz::Executable

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/kerplutz/executable.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, arguments = {}) ⇒ Executable

Returns a new instance of Executable.



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# File 'lib/kerplutz/executable.rb', line 12

def initialize(name, arguments={})
  @arguments = arguments
  @top       = Command.new(name, '', @arguments)
  @commands  = CommandMap.new
end

Instance Attribute Details

#arguments ⇒ Object (readonly)

Returns the value of attribute arguments.



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# File 'lib/kerplutz/executable.rb', line 8

def arguments
  @arguments
end

#commands ⇒ Object (readonly)

Returns the value of attribute commands.



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# File 'lib/kerplutz/executable.rb', line 8

def commands
  @commands
end

#top ⇒ Object (readonly)

Returns the value of attribute top.



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# File 'lib/kerplutz/executable.rb', line 8

def top
  @top
end

Instance Method Details

#add_command(command) ⇒ Object 



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# File 'lib/kerplutz/executable.rb', line 18

def add_command(command)
  commands << command
end

#add_option(option) ⇒ Object 



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# File 'lib/kerplutz/executable.rb', line 22

def add_option(option)
  top.add_option(option, false)
end
 


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# File 'lib/kerplutz/executable.rb', line 54

def banner
  help = ""
  help << top.help << "\n"
  help << " Commands:\n" << commands.summary << "\n"
  help << "Type '#{name} help COMMAND' for help with a specific command.\n"
end

#parse(args) ⇒ Object

TODO: Extract this method into separate class that gives all the involved parties the chance to parse all of the args



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# File 'lib/kerplutz/executable.rb', line 28

def parse(args)
  if args[0] =~ /^(--help|help)$/
    first, *rest = args
    if rest.empty?
      puts banner
    else
      puts commands[rest.first].help
    end
  elsif cmd = args.find { |el| commands.has_command?(el) }
    cmd_idx = args.index(cmd)
    top_args, cmd_args = args.partition.with_index do |_arg, idx|
      idx < cmd_idx
    end
    top.parse(top_args)
    remainder = commands[cmd].parse(cmd_args[1..-1])
  else
    if args.empty?
      puts banner
    else
      remainder = top.parse(args)
    end
  end

  [(cmd and cmd.to_sym) || name.to_sym, arguments, remainder || []]
end