#!/bin/sh
# vim: set sw=4 ts=4 sts=4 et :

set -e

. ./config

mkdir -p \
    /mnt/gentoo/usr/bin \
    /mnt/gentoo/usr/lib \
    /mnt/gentoo/usr/lib64 \
    || exit
[ -h /mnt/gentoo/bin ] || ln -s usr/bin /mnt/gentoo/bin
[ -h /mnt/gentoo/sbin ] || ln -s usr/sbin /mnt/gentoo/sbin
[ -h /mnt/gentoo/usr/sbin ] || ln -s bin /mnt/gentoo/usr/sbin
[ -h /mnt/gentoo/lib ] || ln -s usr/lib /mnt/gentoo/lib
[ -h /mnt/gentoo/lib64 ] || ln -s usr/lib64 /mnt/gentoo/lib64

mkdir -p /mnt/gentoo/etc/portage
ln -snf \
    /var/db/repos/gentoo/profiles/${profile} \
    /mnt/gentoo/etc/portage/make.profile
cp -r portage/. /mnt/gentoo/etc/portage/

ROOT=/mnt/gentoo \
PORTAGE_CONFIGROOT=/mnt/gentoo \
${target}-emerge -Kvnj \
    sys-apps/busybox \
    sys-apps/systemd \
    net-misc/openssh \
    net-misc/wget \
    sys-fs/btrfs-progs \
    --
ROOT=/mnt/gentoo \
PORTAGE_CONFIGROOT=/mnt/gentoo \
${target}-emerge -vnj \
    net-wireless/wireless-regdb \
    sys-kernel/linux-firmware \
    --

mkdir -p \
    /mnt/gentoo/boot/efi \
    /mnt/gentoo/dev \
    /mnt/gentoo/home \
    /mnt/gentoo/proc \
    /mnt/gentoo/sys \
    || exit

: > /mnt/gentoo/etc/machine-id

while read name; do
    if [ ! -h /mnt/gentoo/bin/"${name}" ]; then
        printf "'/bin/%s' -> 'busybox'\n" "${name}"
        ln -snf busybox /mnt/gentoo/bin/"${name}" \
            || printf 'Failed to create busybox symlink for %s\n' "${name}"
    fi
done < busybox.symlinks

tar -c -C overlay . \
    | tar -x --keep-newer-files -C /mnt/gentoo

cp -uv /usr/${target}/usr/bin/grub-editenv /mnt/gentoo/usr/bin/

if [ -f /mnt/gentoo/etc/udev/hwdb.bin ]; then
    mv /mnt/gentoo/etc/udev/hwdb.bin /mnt/gentoo/usr/lib/udev/
fi

systemctl preset-all --root=/mnt/gentoo

systemd-sysusers --root=/mnt/gentoo
if grep -q '^root:.*/bin/bash$' /mnt/gentoo/etc/passwd; then
    sed -ri 's@(root:.*):/bin/bash@\1:/bin/sh@' /mnt/gentoo/etc/passwd
fi

if ! grep -q Include /mnt/gentoo/etc/ssh/sshd_config; then
    echo 'Include /etc/ssh/sshd_config.d/*.conf' \
        >> /mnt/gentoo/etc/ssh/sshd_config
fi