From 651927b2d5d6933c5fef1d30a3cdc288fdb51824 Mon Sep 17 00:00:00 2001
From: JimmyGALLAND <jimmy.galland@celjim.fr>
Date: Wed, 29 Dec 2021 01:30:13 +0100
Subject: [PATCH] add support for intermediate updates

---
 build-loader.sh    | 11 +++++++++++
 include/runtime.sh |  1 +
 2 files changed, 12 insertions(+)

diff --git a/build-loader.sh b/build-loader.sh
index 6fa61684..eed69967 100755
--- a/build-loader.sh
+++ b/build-loader.sh
@@ -205,6 +205,7 @@ if [ ! -d "${BRP_UPAT_DIR}" ]; then
 
   brp_verify_file_sha256 "${BRP_PAT_FILE}" "$(brp_json_get_field "${BRP_REL_CONFIG_JSON}" "os.sha256")"
   brp_unpack_tar "${BRP_PAT_FILE}" "${BRP_UPAT_DIR}"
+
 else
   pr_info "Found unpacked PAT at \"%s\" - skipping unpacking" "${BRP_UPAT_DIR}"
 fi
@@ -213,6 +214,16 @@ fi
 ##### LINUX KERNEL MODIFICATIONS #######################################################################################
 # Prepare Linux kernel image
 readonly BRP_ZLINUX_FILE=${BRP_UPAT_DIR}/$(brp_json_get_field "${BRP_REL_CONFIG_JSON}" 'files.zlinux.name')
+
+if [ ! -f "${BRP_ZLINUX_FILE}" ]; then
+          pr_info "No zimage in Unpacked PAT - Try to find flashupdate package" "${BRP_PAT_FILE}"
+          readonly BRP_FLASHUPDATE_DEBFILE=$( ls -d ${BRP_UPAT_DIR}/flashupdate_*.deb | head -n1 )
+          if [ -f "${BRP_FLASHUPDATE_DEBFILE}" ]; then
+                  pr_process "flashupdate found unpack"
+                  "${DPKG_PATH}" -x "${BRP_FLASHUPDATE_DEBFILE}" "${BRP_UPAT_DIR}"
+          fi
+  fi
+
 readonly BRP_ZLINUX_PATCHED_FILE="${BRP_BUILD_DIR}/zImage-patched"
 if [ ! -f "${BRP_ZLINUX_PATCHED_FILE}" ]; then
   # Using repack method to patch the kernel. This method assumes that it will be interrupted, someone will go and look
diff --git a/include/runtime.sh b/include/runtime.sh
index e4d2d86e..ce233407 100644
--- a/include/runtime.sh
+++ b/include/runtime.sh
@@ -25,6 +25,7 @@ system_tools=(
   [find]="find --version" # repacking ramdisks & finding empty trees
   [chmod]="chmod --version" # making sure executables are executable
   [dirname]="dirname --version" # creating directories from full paths
+  [dpkg]="dpkg --version" # extract flashupdate
 )
 typeset -A custom_tools
 custom_tools=(