dev-ruby/mongo/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>ruby</herd>
  <upstream>
    <remote-id type="github">mongodb/mongo-ruby-driver</remote-id>
  </upstream>
</pkgmetadata>