gentoo-overlay/app-admin/logstash-bin/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="person">
		<email>hydrapolic@gmail.com</email>
		<name>Tomáš Mózes</name>
	</maintainer>
	<maintainer type="person">
		<email>erkiferenc@gmail.com</email>
		<name>Ferenc Erki</name>
	</maintainer>
	<maintainer type="project">
		<email>proxy-maint@gentoo.org</email>
		<name>Proxy Maintainers</name>
	</maintainer>
	<upstream>
		<remote-id type="github">elastic/logstash</remote-id>
	</upstream>
	<use>
		<flag name="x-pack">Enable additional features (may need a license)</flag>
	</use>
</pkgmetadata>