windvn/path/wdvn-image-iso

#!/bin/bash
set -e
DISC_NAME="${WDVN_VER:0:3} $WDVN_ARCH $WDVN_DATE"
DISC_NAME="${DISC_NAME:0:32}"
CHROOT="$1"
IMAGE="$2.tmp"

if [ -d "$IMAGE" ]; then
	rm -r -f "$IMAGE"
fi

EXIT=0
if [ ! -d "/usr/lib/ISOLINUX" ]; then
	echo "ERROR: /usr/lib/ISOLINUX not found. Run 'apt install isolinux'."
	EXIT=1
fi

if [ ! -d "/usr/lib/syslinux" ]; then
	echo "ERROR: /usr/lib/syslinux not found. Run 'apt install syslinux-common'."
	EXIT=1
fi

if [ ! -d "$CHROOT/lib/live/boot" ]; then
	echo "ERROR: /lib/live/boot not found within chroot. On your chroot, run 'apt install live-boot'."
	EXIT=1
fi

if [ ! -f "$CHROOT/usr/share/initramfs-tools/hooks/live" ]; then
	echo "ERROR: /usr/share/initramfs-tools/hooks/live not found within chroot. On your chroot, run 'apt install live-boot-initramfs-tools'."
	EXIT=1
fi

if ! command -v xorriso &> /dev/null
then
	echo "ERROR: xorriso not found. Run 'apt install xorriso'."
	EXIT=1
fi


if [ -f "$2" ]; then
	echo "ERROR: $2 already exists."
	EXIT=1
fi

if [ "$EXIT" == "1" ]; then
	exit 1
fi

mkdir -p "$IMAGE"
mkdir -p "$IMAGE/live"
mkdir -p "$IMAGE/isolinux"

cp -fv "$CHROOT/boot"/vmlinuz-* "$IMAGE/live/vmlinuz"
cp -fv "$CHROOT/boot"/initrd.img-* "$IMAGE/live/initrd.img"
mksquashfs "$CHROOT" "$IMAGE/live/filesystem.squashfs"
#mksquashfs -comp zstd -Xcompression-level 22 "$CHROOT" "$IMAGE/live/filesystem.squashfs"

echo "UI menu.c32

MENU TITLE $WDVN_NAME $WDVN_ARCH $WDVN_VER $WDVN_DATE live
TIMEOUT 600

LABEL linux
 MENU LABEL Linux
 KERNEL /live/vmlinuz
 APPEND initrd=/live/initrd.img boot=live noautologin quiet

LABEL linux-nomodeset
 MENU LABEL Linux (nomodeset)
 KERNEL /live/vmlinuz
 APPEND initrd=/live/initrd.img boot=live noautologin quiet nomodeset

LABEL linux-debug
 MENU LABEL Linux (nomodeset, not quiet)
 KERNEL /live/vmlinuz
 APPEND initrd=/live/initrd.img boot=live noautologin nomodeset
" > "$IMAGE/isolinux/isolinux.cfg"

cp /usr/lib/ISOLINUX/isolinux.bin "$IMAGE/isolinux/"
cp /usr/lib/syslinux/modules/bios/* "$IMAGE/isolinux/"

xorriso \
   -as mkisofs \
   -iso-level 3 \
   -full-iso9660-filenames \
   -volid "$DISC_NAME" \
   -output "$2" \
 -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
 -eltorito-boot \
     isolinux/isolinux.bin \
     -no-emul-boot \
     -boot-load-size 4 \
     -boot-info-table \
     --eltorito-catalog isolinux/isolinux.cat \
 "$IMAGE"
# -eltorito-alt-boot \
#     -e /EFI/boot/efiboot.img \
#     -no-emul-boot \
#     -isohybrid-gpt-basdat \
# -append_partition 2 0xef EFI/boot/efiboot.img \
#   "$IMAGE"