add systemd service generation script (service.sh)

service.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+# Generate systemd service file
+
+FILE=/lib/systemd/system/buttond.service
+
+generate() {
+	echo [Unit]
+	echo Description = buttonctl
+	echo
+	echo [Service]
+	echo ExecStart = /usr/bin/python3 $PWD/button.py
+	echo Type = simple
+	echo
+	echo [Install]
+	echo WantedBy=multi-user.target
+	echo Alias=buttond.service
+}
+
+if test -f $FILE
+then
+	rm $FILE
+fi
+touch $FILE
+generate >> $FILE