Support customised powerwall.yml through upgrade.

Supports a customised powerwall through the upgrade by preserving it before the upgrade by copying it to a .restore copy, and restoring it after the git pull before restarting the containers.

upgrade.sh

@@ -72,6 +72,17 @@ else
     exit 
 fi
 
+# Preserve Customised powerwall.yml?
+read -r -p "Do you want to preserve a customised powerwall.yml (only for specialised users)? [y/N] " response
+if [[ "$response" =~ ^([yY][eE][sS]|[yY])$ ]]
+then
+    echo "preseving powerwall.yml"
+    cp "powerwall.yml" "powerwall.yml.restore"
+else
+    echo "Replacing powerwall.yml with standard as part of upgrade"
+fi
+
+
 # Remember Timezome and Reset to Default
 echo "Resetting Timezone to Default..."
 DEFAULT="America/Los_Angeles"
@@ -140,6 +151,12 @@ if ! grep -q "TZ=" pypowerwall.env; then
     echo "TZ=America/Los_Angeles" >> pypowerwall.env
 fi
 
+if [ -f powerwall.yml.preserve ]; then
+    echo "restoring preserved powerwall.yml"
+    cp "powerwall.yml.restore" "powerwall.yml"
+fi
+
+
 # Make sure stack is running
 echo ""
 echo "Start Powerwall-Dashboard stack..."