module Bundler
  class Specification < Gem::Specification
    attr_accessor :relative_loaded_from

    def self.from_gemspec(gemspec)
      spec = allocate
      gemspec.instance_variables.each do |ivar|
        spec.instance_variable_set(ivar, gemspec.instance_variable_get(ivar))
      end
      spec
    end

    def loaded_from
      return super unless relative_loaded_from
      source.path.join(relative_loaded_from)
    end

    def full_gem_path
      loaded_from.dirname.expand_path
    end
  end
end