sys-power/system76-power: Replace systemd RDEPEND with postinst ewarn

This fixes a pkgcheck issue now that systemd is masked on
split-usr profiles, and is more consistent with how this
type of systemd runtime dependency is handled in ::gentoo.

Signed-off-by: Vivian Heisz (vhz) <demize@unstable.systems>

sys-power/system76-power/system76-power-1.2.1-r2.ebuild

@@ -204,9 +204,6 @@ LICENSE="GPL-3"
 SLOT="0"
 KEYWORDS="~amd64"
 
-DEPEND="sys-apps/systemd"
-RDEPEND="${DEPEND}"
-
 src_prepare() {
 	default
 	# Replace dynamic git dependency of 'sysfs-class' with a static one
@@ -218,3 +215,9 @@ src_install() {
 	default
 	elog "Enable the service: 'systemctl enable --now com.system76.PowerDaemon.service'"
 }
+
+pkg_postinst(){
+	if ! has_version sys-apps/systemd; then
+		ewarn "${PN} is not functional without sys-apps/systemd at this point."
+	fi
+}

sys-power/system76-power/system76-power-9999.ebuild

@@ -13,9 +13,6 @@ LICENSE="GPL-3"
 SLOT="0"
 KEYWORDS=""
 
-DEPEND="sys-apps/systemd"
-RDEPEND="${DEPEND}"
-
 src_unpack(){
 	git-r3_src_unpack
 	cargo_live_src_unpack
@@ -25,3 +22,9 @@ src_install(){
 	default
 	elog "Enable the service: 'systemctl enable --now com.system76.PowerDaemon.service'"
 }
+
+pkg_postinst(){
+	if ! has_version sys-apps/systemd; then
+		ewarn "${PN} is not functional without sys-apps/systemd at this point."
+	fi
+}