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

set -e

. ./config

# Ensure we have a Portage repo
if [ ! -f /var/db/repos/gentoo/metadata/timestamp ]; then
    emerge-webrsync
fi

chown portage: "$(portageq envvar DISTDIR)"

ARCH=$(PORTAGE_CONFIGROOT=/usr/${target} portageq envvar ARCH)
PKGDIR=$(portageq envvar PKGDIR)
FEATURES="${FEATURES} binpkg-multi-instance"

# For some reason, libcap installs its pkg-config files in the wrong
# place.  More strangely, even though `PKG_CONFIG_PATH` contains that
# directory, `pkg-config` does not find the `.pc` files for libcap.
# We work around this by merging /usr/lib64/pkgconfig and
# /usr/lib/pkgconfig.
FEATURES="${FEATURES}" \
PKGDIR="${PKGDIR}" \
${target}-emerge -kb1vnj sys-libs/libcap
if [ -d /usr/${target}/usr/lib/pkgconfig ] \
        && [ ! -d /usr/${target}/usr/lib64/pkgconfig ]; then
    mv /usr/${target}/usr/lib/pkgconfig /usr/${target}/usr/lib64
    ln -snf ../lib64/pkgconfig /usr/${target}/usr/lib/pkgconfig
fi

if [ ! -f portage/make.conf/10-crossdev.conf ]; then
    sed -r \
        -e 's: ?-pam::' \
        -e '/PKGDIR=/d' \
        /usr/${target}/etc/portage/make.conf \
        > portage/config/target/etc/portage/make.conf/10-crossdev.conf
fi

ln -snf /var/db/repos/gentoo/profiles/default/linux/${ARCH}/17.0 \
    /usr/${target}/etc/portage/make.profile

FEATURES="${FEATURES}" \
PKGDIR="${PKGDIR}" \
${target}-emerge -bk1nvj sys-libs/glibc

FEATURES="${FEATURES}" \
PKGDIR=$(portageq envvar PKGDIR) \
USE=pam \
${target}-emerge -bknvj sys-apps/util-linux

# Migrate to the merged-usr layout
mkdir -p /usr/${target}/bin
emerge -bknv --quiet-build=y merge-usr
merge-usr --root=/usr/${target}

# Set the Portage profile
ln -snf \
    /var/db/repos/gentoo/profiles/${profile} \
    portage/config/target/etc/portage/make.profile
ln -snf \
    $(realpath /etc/portage/make.profile) \
    portage/config/host/etc/portage/make.profile