class Bundler::Specification

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 full_gem_path
  loaded_from.dirname.expand_path
end

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