#!/bin/bash
## iso_grubconfig
# Determine FirstRib grub stanzas for menu.lst and grub.conf
# Revision Date: 13 September 2024 Sofiya
# Copyright: Licence: MIT

## Run this script from your FirstRib distro installation directory

progname="iso_grubconfig"; version="1.0.0"; revision="-rc1"

case "$1" in
	'--version') printf "$progname ${version}${revision}\n"; exit 0;;
	'-h'|'--help'|'-?') printf "Run this script from your FirstRib distro installation directory with command:
  ./iso_grubconfig\n";exit 0;;
	"-*") printf "option $1 not available\n";exit 0;;
esac

_grub_config (){
	cd "$HERE"
	subdir="$bootdir"
	bootuuid=`df . | awk '/^\/dev/ {print $1}' | xargs blkid -s UUID | awk -F\" '{print $2}'`
	bootlabel=`df . | awk '/^\/dev/ {print $1}' | xargs blkid -s LABEL | awk -F\" '{print $2}'`
	printf "
Assuming names: kernel is vmlinuz and initrd is initrd.gz and booting is
from this build directory and needed modules and firmware are present:
"
if [ "$bootiso" != '*.iso' ];then
isotext="
############################# grub.cfg (BOOT from ISO):
menuentry \"${subdir}\" {
  iso_path=\"/${subdir}/${bootiso}\"
  export iso_path
  search --set=root --file \$iso_path
  probe -u -s rootuuid \$root
  export rootuuid
  loopback loop \$iso_path
  root=(loop)
  configfile /boot/grub/loopback.cfg
  loopback --delete loop
}"
fi
printf "$isotext

Refer to $PWD/iso_grub_config.txt for
copy of this information plus blkid info.\n" | tee iso_grub_config.txt
	blkid -s UUID >> iso_grub_config.txt
}

HERE="`pwd`"
bootdir=`basename "$HERE"` # for use with grub config
for bootiso in *.iso; do :;done
_grub_config
exit 0