Bug/update device tree link after upgrade (#392)

* After an upgrade, relink the hardware revisions device tree binary

* Add revisoin binaries

* Do not fail on AWS servers

* Correct the bash statement

* Disable system updates for the end user. There are too many unknowns at this point. It can still be done from the command line for expert users.

roles/install_moonraker/files/moonraker.conf

@@ -29,7 +29,7 @@ trusted_clients:
 
 # this enables moonraker's update manager
 [update_manager]
-enable_system_updates: True
+enable_system_updates: False
 
 #[update_manager mainsail]
 #type: web

roles/linux_preparation/files/100update

@@ -1,2 +1,2 @@
 DPkg::Pre-Invoke {"mount -o remount,rw /boot";};
-DPkg::Post-Invoke {"mount -o remount,ro /boot";};
+DPkg::Post-Invoke {"mount -o remount,ro /boot; /usr/local/bin/update-recore-revision";};

roles/linux_preparation/files/get-recore-revision

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+OUTFILE="/dev/"`lsblk -n -o NAME | grep 'mmcblk[0-2]$'`
+
+if ! test -b ${OUTFILE}boot0p1; then
+    partx -a ${OUTFILE}boot0
+fi
+
+mkdir -p /mnt/config
+if ! grep -qs '/mnt/config ' /proc/mounts; then
+    mount -r ${OUTFILE}boot0p1 /mnt/config/
+fi
+
+CONFIG=`ls /mnt/config/*.json`
+REVISION=`cat "$CONFIG" | jq -r ".Revision" | tr '[:upper:]' '[:lower:]'`
+
+echo $REVISION

roles/linux_preparation/files/update-recore-revision

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+if ! lscpu | grep -q Cortex-A53; then
+    exit 0
+fi
+
+REVISION=`get-recore-revision`
+set-recore-revision $REVISION

roles/linux_preparation/tasks/recore.yml

@@ -157,3 +157,13 @@
     src: 100update
     dest: /etc/apt/apt.conf.d/100update
     mode: '0644'
+
+- name: Recore - add files for updating dtb
+  copy:
+    src: '{{item}}'
+    dest: /usr/local/bin
+    mode: '0755'
+  loop:
+    - get-recore-revision
+    - set-recore-revision
+    - update-recore-revision