Convert systemd unit to user script via custom install scripts

debian/postinst

@@ -0,0 +1,33 @@
+#!/bin/sh
+set -e
+# Automatically added by cargo-deb
+if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
+	if deb-systemd-helper --user debian-installed cloudflare-dns-updater.service; then
+		# This will only remove masks created by d-s-h on package removal.
+		deb-systemd-helper --user unmask cloudflare-dns-updater.service >/dev/null || true
+
+		if deb-systemd-helper --user --quiet was-enabled cloudflare-dns-updater.service; then
+			# Create new symlinks, if any.
+			deb-systemd-helper --user enable cloudflare-dns-updater.service >/dev/null || true
+		fi
+	fi
+
+	# Update the statefile to add new symlinks (if any), which need to be cleaned
+	# up on purge. Also remove old symlinks.
+	deb-systemd-helper --user update-state cloudflare-dns-updater.service >/dev/null || true
+fi
+# End automatically added section
+# Automatically added by cargo-deb
+if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
+	if [ -d /run/systemd/system ]; then
+	    USER="$(who | head -1 | awk '{print $1;}')"
+		runuser -l $USER -c "XDG_RUNTIME_DIR=/run/user/$(id -u $USER) systemctl --user daemon-reload >/dev/null || true"
+		if [ -n "$2" ]; then
+			_dh_action=restart
+		else
+			_dh_action=start
+		fi
+		runuser -l $USER -c "XDG_RUNTIME_DIR=/run/user/$(id -u $USER) deb-systemd-invoke --user $_dh_action cloudflare-dns-updater.service >/dev/null || true"
+	fi
+fi
+# End automatically added section

debian/postrm

@@ -0,0 +1,24 @@
+#!/bin/sh
+set -e
+# Automatically added by cargo-deb
+if [ -d /run/systemd/system ]; then
+  USER="$(who | head -1 | awk '{print $1;}')"
+	runuser -l $USER -c "XDG_RUNTIME_DIR=/run/user/$(id -u $USER) systemctl --user daemon-reload >/dev/null || true"
+fi
+# End automatically added section
+# Automatically added by cargo-deb
+if [ "$1" = "remove" ]; then
+	if [ -x "/usr/bin/deb-systemd-helper" ]; then
+	  USER="$(who | head -1 | awk '{print $1;}')"
+		runuser -l $USER -c "XDG_RUNTIME_DIR=/run/user/$(id -u $USER) deb-systemd-helper --user mask cloudflare-dns-updater.service >/dev/null || true"
+	fi
+fi
+
+if [ "$1" = "purge" ]; then
+	if [ -x "/usr/bin/deb-systemd-helper" ]; then
+	  USER="$(who | head -1 | awk '{print $1;}')"
+		runuser -l $USER -c "XDG_RUNTIME_DIR=/run/user/$(id -u $USER) deb-systemd-helper --user purge cloudflare-dns-updater.service >/dev/null || true"
+		runuser -l $USER -c "XDG_RUNTIME_DIR=/run/user/$(id -u $USER) deb-systemd-helper --user unmask cloudflare-dns-updater.service >/dev/null || true"
+	fi
+fi
+# End automatically added section

debian/prerm

@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+# Automatically added by cargo-deb
+if [ -d /run/systemd/system ] && [ "$1" = remove ]; then
+  USER="$(who | head -1 | awk '{print $1;}')"
+	runuser -l $USER -c "XDG_RUNTIME_DIR=/run/user/$(id -u $USER) deb-systemd-invoke --user stop cloudflare-dns-updater.service >/dev/null || true"
+fi
+# End automatically added section