add initial support for automated updates

SD_ROOT/wz_mini/usr/bin/upgrade-run.sh

@@ -0,0 +1,65 @@
+#!/bin/sh
+
+setup() {
+mkdir /opt/Upgrade
+mkdir /opt/Upgrade/preserve
+wget --no-check-certificate https://github.com/gtxaspec/wz_mini_hacks/archive/refs/heads/master.zip -O /opt/Upgrade/wz_mini.zip; sync
+unzip /opt/Upgrade/wz_mini.zip -d /opt/Upgrade/
+cp /opt/wz_mini/wz_mini.conf /opt/Upgrade/preserve/
+cp /opt/wz_mini/etc/ssh/authorized_keys /opt/Upgrade/preserve/
+sync
+reboot
+}
+
+
+upgrade_mode_start() {
+exec 1>> /opt/v3_upgrade.log 2>&1
+set -x
+echo UPGRADE MODE
+umount /opt/wz_mini/tmp
+rm -rf /opt/wz_mini/*
+mv /opt/Upgrade/wz_mini_hacks-master/SD_ROOT/wz_mini/* /opt/wz_mini/
+rm -f /opt/factory_t31_ZMC6tiIDQN
+mv /opt/Upgrade/wz_mini_hacks-master/SD_ROOT/factory_t31_ZMC6tiIDQN /opt/factory_t31_ZMC6tiIDQN
+
+cp /opt/Upgrade/preserve/authorized_keys  /opt/wz_mini/etc/
+cp /opt/Upgrade/preserve/wz_mini.conf /opt/wz_mini/
+rm -rf /opt/Upgrade
+sync
+reboot
+
+}
+
+if [[ -e /tmp/dbgflag ]]; then
+upgrade_mode_start
+else
+
+read -r -p "${1:-wz_mini, this will download the latest version and upgrade your system.  Are you sure? [y/N]} " response
+    case "$response" in
+        [yY][eE][sS]|[yY])
+        if [[ -d /opt/Upgrade ]]; then
+                echo "old Upgrade dir exists"
+                read -r -p "${1:-Unable to proceed, must DELETE old Upgrade directory, are you sure? [y/N]} " response
+                case "$response" in
+                [yY][eE][sS]|[yY])
+                rm -rf /opt/Upgrade
+                sync
+                setup
+                ;;
+                *)
+                echo "User denied directory removal, exit"
+                ;;
+                esac
+        else
+                setup
+        fi
+
+            ;;
+        *)
+                echo "user denied update"
+            ;;
+    esac
+
+
+
+fi