#!/bin/sh -e

k=5.0
p="e2fsprogs"

# --- #

die()
{
	echo "error: $@" 1>&2
	exit 1
}

info()
{
	echo 1>&2
	echo "===> $@" 1>&2
}

# --- #

[ "$(id -u)" = 0 ] || die "must be superuser"
mountpoint -q /mnt || die "/mnt is not a mountpoint"

# --- #

echo "===> gbsn's void-install 1.0 <==="

echo
echo "ENTER to install into /mnt or ^C to cancel"
read x

info "Setting up mountpoints"

for dir in dev proc sys
do
	mkdir -p /mnt/${dir}
	mount -B /${dir} /mnt/${dir}
done

info "Copying XBPS config"

mkdir -p /mnt/usr/share
cp -r /usr/share/xbps.d /mnt/usr/share
mkdir -p /mnt/var/db/xbps/keys
cp /var/db/xbps/keys/* /mnt/var/db/xbps/keys

info "Installing base packages"

alias xi="xbps-install -r /mnt"
xi -S
xi -yU base-files xbps syslinux busybox util-linux kmod runit-void eudev mkinitcpio mkinitcpio-udev findutils grep

info "Applying fixes"

sed -i 's@mktemp -d --tmpdir@mktemp -d -p /tmp@' /mnt/usr/lib/initcpio/functions
for f in $(/mnt/usr/bin/busybox --list)
do
	ln -s busybox /mnt/usr/bin/$f || :
done

info "Installing kernel"

xi -yU linux${k} linux-firmware-amd linux-firmware-intel linux-firmware-network

if [ -n "${p}" ]
then
	info "Installing extra packages"
	xi -yU ${p}
fi

info "Configuring packages"

xbps-reconfigure -r /mnt base-files
chroot /mnt xbps-reconfigure -a

info "Configuring bootloader"

mkdir -p /mnt/boot/extlinux
chroot /mnt extlinux -i /boot/extlinux
dev="$(findmnt -o SOURCE /mnt | sed 1d)"
uuid="$(lsblk -o UUID "${dev}" | sed 1d)"
dev="/dev/$(lsblk -o PKNAME "${dev}" | sed 1d)"
dd if=/mnt/usr/lib/syslinux of="${dev}"
cat > /mnt/boot/extlinux/extlinux.conf << EOF
DEFAULT void

LABEL void
	LINUX /$(cd /mnt/boot && echo vmlinuz*)
	INITRD /$(cd /mnt/boot && echo initramfs*)
	APPEND root=UUID=${uuid} rw quiet
EOF

info "Unmounting"

umount /mnt/*
umount /mnt
sync

info "Installation completed"