instance method packages_with_versions

# File lib/importmap/npm.rb, line 51
  def packages_with_versions
    # We cannot use the name after "pin" because some dependencies are loaded from inside packages
    # Eg. pin "buffer", to: "https://ga.jspm.io/npm:@jspm/core@2.0.0-beta.19/nodelibs/browser/buffer.js"
    with_versions = importmap.scan(/^pin .*(?<=npm:|npm\/|skypack\.dev\/|unpkg\.com\/)([^@\/]+)@(\d+\.\d+\.\d+(?:[^\/\s"']*))/) |
      importmap.scan(/#{PIN_REGEX} #.*@(\d+\.\d+\.\d+(?:[^\s]*)).*$/)

    with_versions.map! do |package, version|
      [extract_base_package_name(package), version]
    end.uniq!

    vendored_packages_without_version(with_versions).each do |package, path|
      $stdout.puts "Ignoring #{package} (#{path}) since no version is specified in the importmap"
    end

    with_versions
  end