OpenWrt support for Zyxel LTE5398-M904

[ncompact]

its function is to detect the packages added to the default firmware
(since they generate the images with "owut" or with "firmware selector" the scripts on the official documentation fail ...
https://openwrt.org/docs/guide-user/installation/sysupgrade.packages)

I found it on this forum:

Detecting user installed pkgs

I think this may be a reasonable solution for you: Please see the new EDIT 2023-10-16 sections for an addition that my make this work fully. Here is a solution for when you need to determine the list of installed packages beyond the default packages and not including packages that are just dependencies and you used the firmware builder etc. Rather than just provide a manual recipe to use the script I referenced a couple days ago, I modified it to minimize manual work. You need to provide the…

In case you want to see what is executed, I attach the script

root@LTE5398-M904:~# cat listUserInstalled.sh

#! /bin/sh
if test ! -s /tmp/my-def-pkgs 
 then 
   echo " /tmp/my-def-pkgs was not found or is empty."
   echo " Please add list of default packages there and re-run this script."
   echo
   exit
 fi

opkg list-installed >/tmp/my-wd-input

echo "made temp file for what-depends list at /tmp/my-wd-input"
echo "generating list of packages and what depends on each to file /tmp/my-wd-output..."

for i in $( cat /tmp/my-wd-input | cut -d\  -f 1 | sort -u )
  do 
    #echo $i
    printf "."
    k=$( opkg whatdepends $i | grep  "^\t" | sed 's/^\t//g' | cut -d\  -f1 | sed 's/\n/ /g' )
    j=$( echo "$k" | wc -w )
    printf "$j\t$i\t $( echo $k )\n" >>/tmp/my-wd-output
    # printf "$j\t$i\t $( echo $k )\n"
    printf "."
done
echo ""

echo "preparing input list for user installed list..."
cat /tmp/my-wd-output | grep "^0" | cut -f2 >/tmp/my-user-inst-input

echo "The list of user installed packages is being written to /tmp/my-user-installed-packages"
echo "as well as on screen..."

for i in $( cat /tmp/my-user-inst-input)
  do
    if !(grep -Fqw $i /tmp/my-def-pkgs)
     then 
       echo $i >>/tmp/my-user-installed-packages
       echo $i
    fi
  done

echo
echo Done
echo "Clean up temp files /tmp/my-wd-output and /tmp/my-user-installed-packages in /tmp/ before re-running script."
echo

and the input file taken from firmware selector:

root@LTE5398-M904:~# cat my-def-pkgs

base-files busybox ca-bundle dnsmasq dropbear firewall4 fstools kmod-crypto-hw-eip93 kmod-gpio-button-hotplug kmod-leds-gpio kmod-mt7603 kmod-mt7615-firmware kmod-nft-offload kmod-usb-ledtrig-usbport kmod-usb-net-qmi-wwan kmod-usb-serial-option kmod-usb3 libc libgcc libustream-mbedtls logd luci mtd netifd nftables odhcp6c odhcpd-ipv6only opkg ppp ppp-mod-pppoe procd procd-seccomp procd-ujail uboot-envtools uci uclient-fetch uqmi urandom-seed urngd wpad-basic-mbedtls