Add ebuild template.

.gentoo/app-emulation/xen-vif-hacking/metadata.xml

@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+
+<pkgmetadata>
+	<maintainer type="person">
+		<email>overlay-maintainer@mad-hacking.net</email>
+		<name>Overlay Maintainer</name>
+	</maintainer>
+	<upstream>
+		<maintainer>
+			<email>default-package-maintainer@mad-hacking.net</email>
+			<name>Default Package Maintainer</name>
+		</maintainer>
+		<bugs-to>https://github.com/MADhacking/rsnapshot-scripts/issues</bugs-to>
+		<doc>https://github.com/MADhacking/rsnapshot-scripts</doc>
+	</upstream>
+</pkgmetadata>

.gentoo/app-emulation/xen-vif-hacking/xen-vif-hacking-9999.ebuild

@@ -0,0 +1,40 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DESCRIPTION="Additional (link-route / default-gateway) vif scripts for Xen"
+HOMEPAGE="https://github.com/GITHUB_REPOSITORY"
+LICENSE="GPL-3"
+
+if [[ ${PV} = *9999* ]]; then
+    inherit git-r3
+    EGIT_REPO_URI="https://github.com/GITHUB_REPOSITORY"
+    EGIT_BRANCH="GITHUB_REF"
+else
+    SRC_URI="https://github.com/GITHUB_REPOSITORY/archive/${PV}.tar.gz -> ${P}.tar.gz"
+fi
+
+KEYWORDS=""
+IUSE="test"
+SLOT="0"
+
+RESTRICT="!test? ( test )"
+
+RDEPEND="app-emulation/xen-tools"
+DEPEND="test? (
+    ${RDEPEND}
+    dev-util/bats-assert
+    dev-util/bats-file
+)"
+
+src_test() {
+    bats --tap tests || die "Tests failed"
+}
+
+src_install() {
+    einstalldocs
+
+    exeinto /etc/xen/scripts
+    doexe etc/xen/scripts/*
+}

.gentoo/overlays

@@ -0,0 +1 @@
+mad-hacking https://github.com/MADhacking/overlay.git