#!/bin/bash

#
# Assumptions:
#  1) User has partitioned, formatted, and mounted partitions on /mnt
#  2) Network is functional
#  3) Arguments passed to the script are valid pacman targets
#  4) A valid mirror appears in /etc/pacman.d/mirrorlist
#

version=0.14.0

shopt -s extglob

DATADIR='/usr/share/manjaro-tools'
LIBDIR='/usr/lib/manjaro-tools'

[[ -r ${LIBDIR}/util-msg.sh ]] && source ${LIBDIR}/util-msg.sh

import ${LIBDIR}/util.sh
import ${LIBDIR}/util-mount.sh

newroot=/mnt

hostcache=false
copykeyring=true
copymirrorlist=true

usage() {
    echo "usage: ${0##*/} [options] root [packages...]"
    echo " -C config      Use an alternate config file for pacman"
    echo " -c             Use the package cache on the host, rather than the target"
    echo " -d             Allow installation to a non-mountpoint directory"
    echo " -G             Avoid copying the host's pacman keyring to the target"
    echo " -i             Avoid auto-confirmation of package selections"
    echo " -M             Avoid copying the host's mirrorlist to the target"
    echo " -h             Print this help message"
    echo ''
    echo ' basestrap installs packages to the specified new root directory.'
    echo ' If no packages are given, basestrap defaults to the "base" group.'
    echo ''
    echo ''
    exit $1
}

# if [[ -z $1 || $1 = @(-h|--help) ]]; then
#   usage
#   exit $(( $# ? 0 : 1 ))
# fi
#

orig_argv=("$@")

opts=':C:cdGiM'

while getopts ${opts} arg; do
    case "${arg}" in
        C) pacman_config=$OPTARG ;;
        d) directory=true ;;
        c) hostcache=true ;;
        i) interactive=true ;;
        G) copykeyring=false ;;
        M) copymirrorlist=false ;;
        :) echo "invalid argument ${arg}:$OPTARG"; usage 1;;
        ?) usage 0 ;;
    esac
done
shift $(( OPTIND - 1 ))

check_root "$0" "${orig_argv[@]}"

(( $# )) || die "No root directory specified"
newroot=$1; shift
pacman_args=("${@:-base}")

${hostcache} && pacman_args+=(--cachedir="$newroot/var/cache/pacman/pkg")

${interactive} && pacman_args+=(--noconfirm)

[[ -n $pacman_config ]] && pacman_args+=(--config="$pacman_config")

[[ -d $newroot ]] || die "%s is not a directory" "$newroot"

if ! mountpoint -q "$newroot" && ! ${directory}; then
die '%s is not a mountpoint!' "$newroot"
fi

# create obligatory directories
create_min_fs "$newroot"

# mount API filesystems
chroot_api_mount "$newroot" || die "failed to setup API filesystems in new root"

msg2 'Installing packages to %s' "$newroot"
if ! pacman -r "$newroot" --needed -Sy "${pacman_args[@]}"; then
    die 'Failed to install packages to new root'
fi

# kill chroot process if needed (TODO: check if needed at all)
kill_chroot_process "$newroot"

if ${copykeyring};then
    copy_keyring "$newroot"
fi

if ${copymirrorlist};then
    copy_mirrorlist "$newroot"
fi