The Hoarder Pattern: beautiful on the outside, dead kittens on the inside. Thanks Sinatra!

scopelift.rb

## Making kick-ass global objects for fun-and-profit DSLs.

module ScopeLifting
  class Application 
    attr_accessor :options

    def initialize
      @options = Hash.new
    end
    
    def local(name, *args, &block)
      print "#{name}::local: "
      puts args.join(' ')
      puts "\t@(cmd ...)\n\t@(cmd ...)"
      yield
    end

    def remote(name, *args, &block)
      print "#{name}::afterok: "
      puts args.join(' ')
      puts "\t@(cmd ...)\n\t@(cmd ...)"
      yield
    end
  end

  module Delegate
    def self.delegate(*methods)
      methods.each do |method_name|
        define_method(method_name) do |*args, &block|
          return super(*args, &block) if respond_to? method_name
          Delegate.target.send(method_name, *args, &block)
        end
        private method_name
      end
    end

    delegate :local, :remote, :options

    class << self
      attr_accessor :target
    end

    self.target = Application.new
  end
end

include ScopeLifting::Delegate


### Phew! Now for the fun. ###

local 'target1' do
  puts "\tdebug on? #{options[:debug] || false}"
  puts "\tenabling debug from this target"
  options[:debug] = true
end

remote 'target2', [:target1, :target3] do
  puts "\tdebug on? #{options[:debug]}"
end



### Console output ###
#
# target1::local: 
# 	@(cmd ...)
#	@(cmd ...)
#	debug on? false
#	enabling debug from this target
#
# target2::afterok: target1 target3
#	@(cmd ...)
#	@(cmd ...)
#	debug on? true