Demonstrating a flexible DSL for configuration .

configure.rb

def project(name, &block)
  Project.new(name, &block)
end

class Project
  def initialize(name, &block)
    @name = name
    @context = eval("self", block.binding)
    instance_eval(&block) if block_given?
  end

  def use_pthreads
    puts "PTHREADS"
  end

  def link_with(lib)
    puts "LINKING WITH #{lib}"
  end

  def method_missing(sym, *args, &block)
    @context.send(sym, *args, &block)
  end
end

class Builder
  def build
    project "myProject" do
      use_pthreads
      link_with libraries_to_link_with
    end
  end

  def libraries_to_link_with
    %w(a b c)
  end
end

Builder.new.build