added update instructions and fixed an issue with updating gravity after sync

README.md

@@ -29,7 +29,7 @@ sudo chmod +x /usr/bin/synchole.sh
 
 5. Configure the synchole script to your liking.
 ```
-sudo vim /opt/synchole.sh
+sudo vim /usr/bin/synchole.sh
 ```
 The config section is at the top of the script.
 
@@ -44,5 +44,16 @@ Example cronjob: `*/5 * * * * /opt/synchole/synchole.sh -q` (this runs synchole
 9. Happy syncholeing!
 
 
+## Update
+
+1. To update synchole login via SSH to the `SLAVE` server.
+
+2. Run the following commands (again) on the `SLAVE` server.
+```
+sudo wget https://socialg.it/david/synchole/raw/master/synchole.sh -O /usr/bin/synchole.sh
+sudo chmod +x /usr/bin/synchole.sh
+```
+
+
 ## Resources
 - https://discourse.pi-hole.net/t/what-files-does-pi-hole-use/1684

synchole.sh

@@ -205,6 +205,7 @@ for LIST in $LISTS; do
     log info "Installing $LIST."
     if ! install_list $LIST; then
       log error "Something went wrong while installing $LIST"
+      exit 1
     else
       log success "Successfully installed $LIST"
       CHANGES=1
@@ -216,8 +217,9 @@ done
 
 ## run updateGravity
 if [ $CHANGES -eq 1 ]; then
-  if update_gravity; then
+  if ! update_gravity; then
     log error "Something went wrong while updating gravity"
+    exit 1
   else
     log success "Gravity has been successfully updated"
   fi