List openwrt user installed packages without the additional dependencies. Used for generating the PACKAGES variable in openwrt imagebuilder.

list-installed.sh

#!/bin/sh
P=/usr/lib/opkg/status
T=$(awk -v RS= '/^P.{0,8}ker/' $P|grep '^I'|cut -d' ' -f2) #get timestamp of firmware
I=$(awk -v RS= -v t="$T" '$0 !~t' $P|grep '^Pa'|cut -d' ' -f2|sort) #get all user installed packages
D=$(awk -v RS= -v t="$T" '$0 !~t' $P|grep '^D'|cut -d' ' -f2-|sed 's#, #\n#g'|sort|uniq) #get packages that are dependencies
p=;for i in $I;do if [ $(echo $D|grep -c $i) = 0 ];then p="$p $i";fi;done;echo $p #get user packages not listed as a dependency