#!/usr/bin/env bash
set -o errexit
set -o xtrace

export DEBIAN_FRONTEND=noninteractive

CROSS_ARCHITECTURES=(i386 armhf arm64 ppc64el)
for arch in ${CROSS_ARCHITECTURES[@]}; do
  dpkg --add-architecture $arch
done

apt-get install -y \
  ca-certificates

sed -i -e 's/http:\/\/deb/https:\/\/deb/g' /etc/apt/sources.list
echo 'deb https://deb.debian.org/debian buster-backports main' >/etc/apt/sources.list.d/backports.list

apt-get update

# Use newer packages from backports by default
cat >/etc/apt/preferences <<EOF
Package: *
Pin: release a=buster-backports
Pin-Priority: 500
EOF

apt-get dist-upgrade -y

apt-get install -y --no-remove \
  build-essential \
  docbook-xsl \
  libatomic-ops-dev \
  libcairo2-dev \
  libcunit1-dev \
  libpciaccess-dev \
  meson \
  ninja-build \
  pkg-config \
  python3 \
  python3-pip \
  python3-wheel \
  python3-setuptools \
  python3-docutils \
  valgrind

for arch in ${CROSS_ARCHITECTURES[@]}; do
  cross_file=/cross_file-$arch.txt

  # Cross-build libdrm deps
  apt-get install -y --no-remove \
    libcairo2-dev:$arch \
    libpciaccess-dev:$arch \
    crossbuild-essential-$arch

  # Generate cross build files for Meson
  /usr/share/meson/debcrossgen --arch $arch -o $cross_file

  # Work around a bug in debcrossgen that should be fixed in the next release
  if [ $arch = i386 ]; then
    sed -i "s|cpu_family = 'i686'|cpu_family = 'x86'|g" $cross_file
  fi
done


# Test that the oldest Meson version we claim to support is still supported
pip3 install meson==0.43