Provide update-alternatives to shwitch to archive mode

.github/workflows/debian.yml

@@ -28,7 +28,8 @@ jobs:
           mkdir -p PKG_SOURCE/var/lib/timetracker
           mkdir -p PKG_SOURCE/lib/systemd/system
           cp -Rf ./DEBIAN PKG_SOURCE/
-          cp -Rf ./timetracker PKG_SOURCE/usr/local/bin/
+          cp -Rf ./timetracker PKG_SOURCE/var/lib/timetracker/
+          cp -Rf ./scripts/* PKG_SOURCE/var/lib/timetracker/
           cp -Rf ./systemd/* PKG_SOURCE/lib/systemd/system/
 
       - name: Create Deb package

DEBIAN/postinst

@@ -5,6 +5,11 @@ set -e
 case "$1" in
     configure)
       chown -R timetracker:timetracker /var/lib/timetracker
+
+      chmod u+x /var/lib/timetracker/timetracker*.sh
+
+      update-alternatives --install /usr/local/bin/timetracker timetracker /var/lib/timetracker/timetracker-archive.sh 100
+      update-alternatives --install /usr/local/bin/timetracker timetracker /var/lib/timetracker/timetracker.sh 1000
     ;;
 
     abort-upgrade|abort-remove|abort-deconfigure)

DEBIAN/prerm

@@ -10,6 +10,8 @@ case "$1" in
       if getent group timetracker >/dev/null; then
         delgroup --system timetracker
       fi
+
+      update-alternatives --remove-all timetracker
     ;;
 
     upgrade)

Readme.md

@@ -18,7 +18,13 @@ The timetracker application provides the following arguments which can be passed
 
 The application is triggered by a systemd timer which triggers the application via systemd unit.
 
-*Note:* Running timetracker with ystemd unit uses the default property values. To change it you have to modify the unit file.
+*Note:* Running timetracker with systemd unit uses the default property values. To change it you have use the appropriate alternative.
+
+### Switch alternative
+
+```shell
+update-alternatives --config timetracker
+```
 
 To enable the timer you have to (requires root privileges):