Debian packaging: properly handle /etc/evcc-userchoices.sh lifecycle (#27989)

.goreleaser-nightly.yml

@@ -85,6 +85,7 @@ nfpms:
 
     dependencies:
       - adduser
+      - ucf
 
     contents:
       - src: ./packaging/init/evcc.service

.goreleaser.yml

@@ -105,6 +105,7 @@ nfpms:
 
     dependencies:
       - adduser
+      - ucf
 
     contents:
       - src: ./packaging/init/evcc.service

packaging/scripts/postinstall.sh

@@ -58,6 +58,11 @@ KEEP_ETC_SERVICE=$KEEP_ETC_SERVICE
 KEEP_USR_LOCAL_BIN=$KEEP_USR_LOCAL_BIN
 EOF
 
+	# Register file with ucfr so it is tracked as belonging to the evcc package
+	if [ -x /usr/bin/ucfr ]; then
+		ucfr evcc "$USER_CHOICE_CONFIG"
+	fi
+
 	# Execute the user decision
 	if [ -f "$ETC_SERVICE" ] && [ "$KEEP_ETC_SERVICE" -eq 0 ]; then
 		echo "Deleting old service file '$ETC_SERVICE'"

packaging/scripts/postremove.sh

@@ -16,6 +16,12 @@ if [ "$1" = "purge" ]; then
 		deb-systemd-helper purge evcc.service > /dev/null || true
 		deb-systemd-helper unmask evcc.service > /dev/null || true
 	fi
+
+	# Remove the user choices config file and deregister it from ucfr
+	if [ -x /usr/bin/ucfr ]; then
+		ucfr --purge evcc /etc/evcc-userchoices.sh || true
+	fi
+	rm -f /etc/evcc-userchoices.sh
 fi
 
 # if interactive: call `/usr/bin/evcc checkconfig` and check the return code (newer version)