#!/bin/sh -e
set -e

if [ "$(id -u)" != 0 ]; then
    echo "This script needs root permissions!" 1>&2
    exit 1
fi

if [ "$#" -lt 2 ]; then
    echo "Usage: $0 <slackware> <chroot>" 1>&2
    exit 1
fi

slackware="$(realpath "$1")"
chroot="$(realpath "$2")"

temp="$(mktemp -d -t makechroot.XXXXXX)"

# Make sure we clean up properly before exitting
cleanup() {
    mountpoint -q "$temp/mnt" && umount "$temp/mnt"
    mountpoint -q "$temp/dvd" && umount "$temp/dvd"
    rm -rf "$temp"
}
trap 'cleanup' EXIT

# Extract the initrd
cd "$temp"
xz -cd "$slackware/isolinux/initrd.img" | cpio -id

# Mount the dvd
mkdir dvd
mount --bind "$slackware" dvd

# Mount the destination
mkdir -p "$chroot"
mount --bind "$chroot" mnt

# Install the packages
env -i chroot . sh -l -c '
/sbin/installpkg --root /mnt --terse /dvd/slackware*/*/*.t?z

cd /mnt
for script in \
    04.mkfontdir \
    05.fontconfig \
    07.update-desktop-database \
    07.update-mime-database \
    08.gtk-update-icon-cache \
    11.cacerts \
    cups-genppdupdate
do
    var/lib/pkgtools/setup/setup.$script
done
chroot . /usr/bin/update-gtk-immodules > /dev/null 2>&1
HOME=/root chroot . /usr/bin/update-gdk-pixbuf-loaders > /dev/null 2>&1
chroot . /usr/bin/update-pango-querymodules > /dev/null 2>&1
chroot . /usr/bin/glib-compile-schemas /usr/share/glib-2.0/schemas > /dev/null 2>&1
'
# We only run a few setup scripts that do not require user interaction, and deal with updating caches and such, which is not done (properly) by the doinst.sh scripts.
# To get a full list, run: bzcat MANIFEST.bz2 | awk '{print $6}' | grep '^var/log/setup/setup\.' | sort
# Besides the setup scripts, we also need to run some programs which are usually ran from /etc/rc.d/rc.M, but not from the setup scripts.
# This is tailored to Slackware 15.0-current, I'm unsure whether it'll work properly on any other version.