class Bundler::Installer

def ensure_specs_are_compatible!
  @definition.specs.each do |spec|
    unless spec.matches_current_ruby?
      raise InstallError, "#{spec.full_name} requires ruby version #{spec.required_ruby_version}, " \
        "which is incompatible with the current version, #{Gem.ruby_version}"
    end
    unless spec.matches_current_rubygems?
      raise InstallError, "#{spec.full_name} requires rubygems version #{spec.required_rubygems_version}, " \
        "which is incompatible with the current version, #{Gem.rubygems_version}"
    end
  end
end