See https://github.com/digint/btrbk/commit/
6cf5d59
Closes: https://github.com/gentoo/gentoo/pull/5251
--- /dev/null
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit systemd
+
+if [[ ${PV} == "9999" ]] ; then
+ EGIT_REPO_URI="git://dev.tty0.ch/btrbk.git"
+ inherit git-r3
+ SRC_URI=""
+ KEYWORDS=""
+else
+ SRC_URI="https://digint.ch/download/btrbk/releases/${P}.tar.xz"
+ KEYWORDS="amd64 arm x86"
+fi
+
+DESCRIPTION="Tool for creating snapshots and remote backups of btrfs subvolumes"
+HOMEPAGE="https://digint.ch/btrbk/"
+LICENSE="GPL-3+"
+SLOT="0"
+IUSE="+pv"
+
+DEPEND=""
+RDEPEND="dev-lang/perl
+ net-misc/openssh
+ pv? ( sys-apps/pv )
+ >=sys-fs/btrfs-progs-3.18.2 <sys-fs/btrfs-progs-4.8.3"
+
+src_install() {
+ emake DESTDIR="${D}" DOCDIR="/usr/share/doc/${PF}" SYSTEMDDIR="$(systemd_get_systemunitdir)" install
+}