require 'active_support/core_ext/hash/deep_merge'
require 'active_support/option_merger'

class Dependencies::Reader

  attr_reader :dependencies

  def self.read(definitions)
    reader = new
    reader.instance_eval(definitions)
    reader.dependencies
  end

  def self.read_file(filename)
    self.read(File.read(filename))
  end

  def initialize
    @dependencies = []
  end

  def dependency(name, *options)
    @dependencies << ::Dependencies::Dependency.new(name, *options)
  end

  def with_options(options)
    yield ActiveSupport::OptionMerger.new(self, options)
  end

end