#!/bin/bash

set -euo pipefail

# lspp is a submodule; initialize it without moving an existing checkout.
if git rev-parse --git-dir >/dev/null 2>&1 &&
	git submodule status | grep -q '^-'
then
	git submodule update --init --recursive
fi

QCOW=netbsd.qcow2
INSTALLER_ISO=netbsd-installer.iso

if [ ! -f "$QCOW" ]
then
	qemu-img create -f qcow2 "$QCOW" 16G
fi

if [ ! -f "$INSTALLER_ISO" ]
then
	wget -O "$INSTALLER_ISO" 'https://cdn.netbsd.org/pub/NetBSD/NetBSD-11.0/images/NetBSD-11.0-amd64-dvd.iso'
fi

if [ ! -f "src.tgz" ]
then
	wget -r -np -nd -A '*.tgz' \
	  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-11.0/source/sets/
fi

# netbsd is the build toolchain etc.
if [ ! -d "netbsd" ]
then
	mkdir -p netbsd

	for file in *.tgz; do
		tar xvf "$file" netbsd/
	done
fi

cd netbsd/usr/src

if [ ! -d "./netbsd/tools" ]
then
	# patch for GCC 16
	sed -i \
	    's/void g(){}/void g(int,t1 const*,t1,t2,t1 const*,int){}/g' \
	    external/lgpl3/gmp/dist/configure \
	    external/lgpl3/gmp/dist/acinclude.m4

	./build.sh \
	    -U -u -j10 \
	    -m amd64 \
	    -x \
	    -O "../../obj" \
	    -T "../../tools" \
	    -D "../../sysroot" \
	    -R "../../release" \
	    -V MKCXX=yes \
	    -V HOST_CFLAGS="-O2 -std=gnu17" \
	    distribution
fi