main/postmarketos-bootsplash: systemd support (MR 5181)

Install a kill-pbsplash systemd service which is configured to be
started as part of the graphical-session user target. Additionally
install an override so that if the display-manager service (aliases to
gdm, sddm, etc) fails to start it will still kill pbsplash.

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>
Co-authored-by: Clayton Craft <clayton@craftyguy.net>

main/postmarketos-bootsplash/APKBUILD

 # Maintainer: Caleb Connolly <caleb@connolly.tech>
 pkgname=postmarketos-bootsplash
-pkgver=0.2.1
+pkgver=0.2.2
 pkgrel=0
 pkgdesc="pmOS integration components for pbsplash"
 url="https://postmarketos.org"
@@ -8,9 +8,12 @@ arch="all"
 license="CC-BY-SA-3.0"
 depends="devicepkg-utils pbsplash"
 options="!check" # no testsuite
-subpackages="$pkgname-openrc"
+subpackages="$pkgname-openrc $pkgname-systemd"
 source="
 	kill-pbsplash
+	kill-pbsplash.service
+	shutdown-splash.service
+	kill-pbsplash-override.conf
 	99-shutdown-pbsplash.stop
 	OpenSans-Regular.svg
 	pmos-logo.svg
@@ -35,8 +38,32 @@ openrc() {
 	default_openrc
 }
 
+systemd() {
+	install_if="$pkgname=$pkgver-r$pkgrel systemd"
+
+	install -Dm644 "$srcdir/kill-pbsplash.service" -t \
+		"$subpkgdir"/usr/lib/systemd/system/
+	mkdir -p "$subpkgdir"/usr/lib/systemd/system/multi-user.target.wants
+	ln -s ../kill-pbsplash.service \
+		"$subpkgdir"/usr/lib/systemd/system/multi-user.target.wants/
+	install -Dm644 "$srcdir/kill-pbsplash-override.conf" -t \
+		"$subpkgdir"/usr/lib/systemd/system/display-manager.service.d/
+
+	install -Dm644 "$srcdir/shutdown-splash.service" \
+		-t "$subpkgdir"/usr/lib/systemd/system/
+	# Install into related targets
+	for target in halt reboot shutdown; do
+		mkdir -p "$subpkgdir"/usr/lib/systemd/system/"$target".target.wants
+		ln -s ../shutdown-splash.service \
+			"$subpkgdir"/usr/lib/systemd/system/"$target".target.wants/
+	done
+}
+
 sha512sums="
 7e5416f0f9de3605dcbc5ddd4b93d244fd6d4fd1bc2d5a15a034263f8517fc51e73509f29f2a13397d059913917990ada89b36ac7b00a0d21c0283fade755c1c  kill-pbsplash
+9501b82c1da0495469dfd8daf3ab4c8b3cf4e818906d76b225ebd6e8ea2c2171c7834c3ba521e980b9cedc12955e4a22bc3bfbee73fb7cf6305c920aaa6afa53  kill-pbsplash.service
+476c7a8106429c35e772eaf98e257f7a77070050431875113c7c0c75a358250757a381086c7302f1eded0d4cde88d2e63f9fa5d69b6fce46e2d908afd8d9323a  shutdown-splash.service
+c413607e21c805fff3d9948963aebf1048cdb2e68ed2f4316723d21f861a32aede7d1bf3851c8ba7562b07302471ca6d8f7be1e0487d83dd4cdea9bbb506e792  kill-pbsplash-override.conf
 3b862e2282c79d6ffc7aa8dc3992562c11fea5633c98e3ff9c6205a907f5d995e9fcf098adcf294e0648436df97746a3943b9b761ddf72339cc5589fb8904a8d  99-shutdown-pbsplash.stop
 2387c64d84f0ba3ee76925f55c87ce025140aa3cd462107a851c34ffd89bd52f606e0d1f9f371d4f642d96545d5cc1bc0fcfb23ca7629a9149055f068da6bffd  OpenSans-Regular.svg
 98984fd67b99400d2b08422c4d314da558d3c94ee67dbc895e7bbfd6fdf22d4b2c9d35f48f4b73b383a054f535d4089fb705c5532f034cb2ee54eab2184e8e86  pmos-logo.svg

main/postmarketos-bootsplash/kill-pbsplash-override.conf

+[Unit]
+# Trigger killing pbsplash when the display manager starts
+OnFailure=kill-pbsplash.service

main/postmarketos-bootsplash/kill-pbsplash.service

+[Unit]
+Description=Stop pbsplash
+After=graphical.target
+Requisite=graphical.target
+
+[Service]
+ExecStart=-/usr/bin/killall pbsplash
+Type=oneshot
+RemainAfterExit=yes
+
+[Install]
+WantedBy=graphical.target

main/postmarketos-bootsplash/shutdown-splash.service

+[Unit]
+Description=Displays shutdown splash
+DefaultDependencies=no
+Before=halt.target shutdown.target reboot.target
+
+[Service]
+RemainAfterExit=yes
+ExecStart=-/usr/bin/pbsplash -s /usr/share/pbsplash/pmos-logo-text.svg -b "Shutting down..."
+
+[Install]
+WantedBy=halt.target shutdown.target reboot.target