#!/bin/sh
set -e

# Use qemu if necessary
#qemu=qemu-i386
qemu=

NPROC="${NPROC:-$(nproc)}"

rm -rf system
mkdir -p builds

# Stage 1: Build matching mes and busybox binaries
NPROC="$NPROC" ./build_binaries.sh
mv system/binaries.tar.gz builds/

# Stage 2: Bootstrap system from these
mkdir -p system/sources/
cp -av sources/* system/sources/
cp build_bootstrap.sh system/sources/
mkdir system/dev system/tmp
mknod system/dev/null c 1 3
mknod system/dev/tty c 5 0
$qemu system/bin/busybox chroot system /bin/busybox env -i NPROC="$NPROC" /bin/busybox sh /sources/build_bootstrap.sh
mv system/bootstrap.tar.gz builds/

# Stage 2.5 (optional): Rebuild bootstrap binaries to have a "clean" archive
if [ "$1" = double_bootstrap ]; then
cp build_binaries.sh binaries.sha1 busybox-config system/
$qemu system/bootstrap/bin/chroot system /bootstrap/bin/env -i NPROC="$NPROC" PATH=/bootstrap/bin /bootstrap/bin/sh /build_binaries.sh
mv system/system/binaries.tar.gz builds/
rm system/build_binaries.sh system/binaries.sha1 system/busybox-config
rm -rf system/system/
fi

# Stage 3: Cross-compile system for x86_64
cp build_cross.sh system/sources
$qemu system/bootstrap/bin/chroot system /bootstrap/bin/env -i NPROC="$NPROC" /bootstrap/bin/sh /sources/build_cross.sh
mv system/system/cross.tar.gz builds/