#!/bin/bash

set -e

# # Exit if location not specified
# if [ -z "$1" ]; then
#       echo "chroot folder not specified"
#       exit 1
# elif [ "$1" = -h ]; then
#       echo "./chroot.sh <chroot-folder>"
#       exit 1
# fi

location=${1:-$(dirname "$(realpath "$0")")/chrooted-slackware/}
echo "$location"
cd "$location"

# Mounting, basic
for i in /dev /dev/pts /proc /sys /sys/firmware/efi/efivars /run; do
    sudo mount -B $i "$location"$i || exit 1
done

for i in /home/installs; do
    sudo mount -B $i "$location"$i || exit 1
done

mkdir -p "$location"/var/lib/sbopkg/
rsync -Ha --delete --info=progress2 /var/lib/sbopkg/ "$location"/var/lib/sbopkg/

# For internet access
sudo cp /etc/resolv.conf "$location"/etc/resolv.conf

# Finally, chroot
# Need to ensure correct variables
# http://www.iitk.ac.in/LDP/LDP/lfs/5.0/html/chapter06/chroot.html
sudo chroot "$location" \
        /usr/bin/env -i \
        HOME=/root TERM="$TERM" PS1='\u:\w\$ ' \
        PATH=/bin:/usr/bin:/sbin:/usr/sbin \
        /bin/bash --login

# Unmounting after exit from chroot
for i in /dev /dev/pts /proc /sys /sys/firmware/efi/efivars /run; do
    sudo umount "$location"$i || exit 1
done

for i in /home/installs; do
    sudo umount "$location"$i || exit 1
done

echo "Done"