headscale-bin: Add -bin ebuild

Based on the gentoo headscale one, but using the official amd64
binary, as a lame workaround for the "improved" 0.17+ NIX buildsystem.

Signed-off-by: Stefan Knoblich <stkn@bitplumber.de>

net-vpn/headscale-bin/headscale-bin-0.17.1.ebuild

@@ -0,0 +1,50 @@
+# Copyright 2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit systemd
+
+DESCRIPTION="An open source, self-hosted implementation of the Tailscale control server"
+HOMEPAGE="https://github.com/juanfont/headscale"
+SRC_URI="https://github.com/juanfont/headscale/releases/download/v${PV}/headscale_${PV}_linux_amd64
+	 https://github.com/juanfont/headscale/archive/refs/tags/v${PV}.tar.gz -> headscale-${PV}.tar.gz"
+
+LICENSE="BSD Apache-2.0 MIT"
+SLOT="0"
+KEYWORDS="~amd64"
+S="${WORKDIR}/headscale-${PV}"
+
+DEPEND="
+	acct-group/headscale
+	acct-user/headscale
+	!net-vpn/headscale
+"
+RDEPEND="
+	${DEPEND}
+	net-firewall/iptables
+"
+
+PATCHES=(
+	"${FILESDIR}"/config-socket.patch
+)
+
+src_compile() {
+	cp "${DISTDIR}/headscale_${PV}_linux_amd64" headscale || die "Failed to copy headscale binary"
+}
+
+src_install() {
+	dobin headscale
+	dodoc -r docs/* config-example.yaml
+	keepdir /etc/headscale /var/lib/headscale
+	systemd_dounit "${FILESDIR}"/headscale.service
+	newconfd "${FILESDIR}"/headscale.confd headscale
+	newinitd "${FILESDIR}"/headscale.initd headscale
+	fowners -R ${PN}:${PN} /etc/headscale /var/lib/headscale
+}
+
+pkg_postinst() {
+	[[ -f "${EROOT}"/etc/headscale/config.yaml ]] && return
+	elog "Please create ${EROOT}/etc/headscale/config.yaml before starting the service"
+	elog "An example is in ${EROOT}/usr/share/doc/${PV}/config-example.yaml"
+}