#!/bin/sh
umask 022
set -e

if [ "$(id -u)" != "0" ]; then
    echo "Please run this script as root" 1>&2
    exit 1
fi

if [ ! "$rocket" ]; then
    echo 'Please set the $rocket variable' 1>&2
    exit 1
fi

mkdir -p "$rocket/dev" "$rocket/proc" "$rocket/sys" "$rocket/run"
mount --bind /dev "$rocket/dev"
mount -t devpts devpts "$rocket/dev/pts"
mount -t proc proc "$rocket/proc"
mount -t tmpfs tmpfs "$rocket/run"
if [ -h "$rocket/dev/shm" ]; then
    mkdir -p "$rocket/$(readlink "$rocket/dev/shm")"
fi

chroot "$rocket" /tools/bin/env -i \
    HOME=/root \
    TERM="$TERM" \
    PS1="(buildenv) \u:\w \$ " \
    PATH=/bin:/sbin:/usr/bin:/usr/sbin:/tools/bin \
    MAKEFLAGS="$MAKEFLAGS" \
    /tools/bin/ash -l