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#!/usr/bin/env bash
# Vasile needs root privileges and a proper kernel to run
kernelconfig
checkroot
prepareiso () {
# we really need this folder as quick as possible
mkdir -p "$isosyncdir"
# create an empty 20GB ext4 fs were our rootfs will stay
dd if=/dev/zero of=""$isosyncdir".img" bs=50M count=400
mkfs.ext4 ""$isosyncdir".img"
# create live iso layout
mkdir -p "$isostagingdir"
mkdir -p "$isobootdir"
mkdir -p "$isoefibootdir"
mkdir -p "$isoliveosdir"
mkdir -p "$isosupersquashdir"
mkdir -p "$isolivesqfsdir"
# mount && copy core stage 4 image
mount -t squashfs "$chrootx64" "$isostagingdir"
mount -t ext4 ""$isosyncdir".img" "$isosyncdir"
rsync -aHAXr --progress "$isostagingdir/" "$isosyncdir/"
# copy kernel into cdroot
cp -avx ""$isosyncdir"/boot/"$isokernelname"" ""$isorootdir"/boot/vmlinuz"
# generate live initramfs
isostart
isoramfs
isostop
# generate system initramfs
isostart
systemramfs
isostop
# copy live initramfs into cdroot
mv ""$isosyncdir"/boot/"$isodracutrd"" ""$isorootdir"/boot/initrd"
# generate live efi image
isostart
isoefiimg
isostop
# copy efi image into cdroot
mv ""$isosyncdir"/root/bootx64.efi" "$isoefibootdir"
chmod 755 ""$isoefibootdir"/bootx64.efi"
# configure portage && give up control for package / desktop environment installation
isostart
isooverlays
isobuildsystem
isousertree
isochroot
isostop
# unmount rootfs before compression
umount -l "$isosyncdir" > /dev/null 2>&1
# move rootfs in place
mv ""$isosyncdir".img" "$isolivesqfsdir"
# squash rootfs with best compression
mksquashfs "$isosupersquashdir" ""$isorootdir"/squashfs.img" -b 1048576 -comp xz -Xdict-size 100%
# move squashed rootfs in place
mv ""$isorootdir/"squashfs.img" "$isoliveosdir"
}
bootcoreiso () {
# configure live bootloader
git clone https://gitlab.com/"$releasename"/boot-core.git "$bootcorepath"
cp -avx "$bootcorefiles" "$isorootdir"
}
cleanupiso () {
umount "$isostagingdir"
rm -rf "$isosyncdir"
rm -rf "$isostagingdir"
rm -rf "$isosupersquashdir"
rm -rf "$bootcorepath"
}
makeiso () {
grub2-mkrescue -o ""$releasename"-"$releasetarget"-"$releaseversion"-"$isomainarch".iso" "$isorootdir"
}
main () {
chrootchecksum
prepareiso
bootcoreiso
cleanupiso
makeiso
}
main
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