busybox: init: post update script hook

packages/sysutils/busybox/package.mk

@@ -130,6 +130,7 @@ makeinstall_target() {
     cp ${PKG_DIR}/scripts/fs-resize ${INSTALL}/usr/lib/libreelec
     sed -e "s/@DISTRONAME@/${DISTRONAME}/g" \
         -i ${INSTALL}/usr/lib/libreelec/fs-resize
+    find_file_path config/post-update ${PKG_DIR}/scripts/post-update && cp -PRv ${FOUND_PATH} ${INSTALL}/usr/lib/libreelec
 
     if listcontains "${FIRMWARE}" "rpi-eeprom"; then
       cp ${PKG_DIR}/scripts/rpi-flash-firmware ${INSTALL}/usr/lib/libreelec

packages/sysutils/busybox/scripts/init

@@ -267,6 +267,13 @@ get_project_arch() {
   fi
 }
 
+get_distro_version() {
+  if [ -f ${1}/etc/os-release ]; then
+    . ${1}/etc/os-release
+    echo "${VERSION_ID}"
+  fi
+}
+
 # If the project/arch of current matches the update, then it is considered compatible.
 # Otherwise, mount the update SYSTEM partition and, if canupdate.sh is available,
 # call the script to determine if the current update file can be applied on to the
@@ -293,6 +300,14 @@ check_is_compatible() {
   old_project_arch="$(get_project_arch "/sysroot")" || return
   new_project_arch="$(get_project_arch "/update")" || return
 
+  # old image will be gone by the time post-update runs
+  if [ -f "/update/usr/lib/libreelec/post-update" ]; then
+    export OLD_PROJECT_ARCH=$old_project_arch
+    export NEW_PROJECT_ARCH=$new_project_arch
+    export OLD_DISTRO_VERSION="$(get_distro_version "/sysroot")"
+    export NEW_DISTRO_VERSION="$(get_distro_version "/update")"
+  fi
+
   # If old or new project/arch isn't available then could be very old (pre-/etc/os-release) build - have to trust it
   if [ -n "${old_project_arch}" -a -n "${new_project_arch}" ]; then
     # If the old project/arch is not compatible with the new project/arch then abort...
@@ -359,6 +374,19 @@ update_bootloader() {
   fi
 }
 
+post_update_tasks() {
+  if [ -f "${SYSTEM_ROOT}/usr/lib/libreelec/post-update" ]; then
+    local result
+
+    StartProgress spinner "Running post update tasks... "
+      result="$(sh ${SYSTEM_ROOT}/usr/lib/libreelec/post-update 2>&1)"
+      sync
+    StopProgress "done"
+    [ -n "${result}" ] && echo "${result}"
+    sleep 10
+  fi
+}
+
 set_consolefont() {
   local vres
 
@@ -932,6 +960,7 @@ check_update() {
   umount /sysroot
   update_file "System" "$UPDATE_SYSTEM" "/flash/$IMAGE_SYSTEM"
   update_bootloader
+  post_update_tasks
   do_cleanup
   do_reboot
 }

packages/sysutils/busybox/scripts/post-update

@@ -0,0 +1,13 @@
+#!/bin/sh
+# Copyright (C) 2023-present Team LibreELEC (https://libreelec.tv)
+
+# post-update script demo
+
+echo "BOOT_ROOT=${BOOT_ROOT}"
+echo "SYSTEM_ROOT=${SYSTEM_ROOT}"
+echo "OLD_PROJECT_ARCH=${OLD_PROJECT_ARCH}"
+echo "NEW_PROJECT_ARCH=${NEW_PROJECT_ARCH}"
+echo "OLD_DISTRO_VERSION=${OLD_DISTRO_VERSION}"
+echo "NEW_DISTRO_VERSION=${NEW_DISTRO_VERSION}"
+
+exit