test_old_deps.sh

#!/usr/bin/env bash
# this script is run by GitHub Actions in a plain `focal` container; it installs the
# minimal requirements for tox and hands over to the py3-old tox environment.

# Prevent tzdata from asking for user input
export DEBIAN_FRONTEND=noninteractive

set -ex

apt-get update
apt-get install -y \
        python3 python3-dev python3-pip python3-venv \
        libxml2-dev libxslt-dev xmlsec1 zlib1g-dev tox libjpeg-dev libwebp-dev

export LANG="C.UTF-8"

# Prevent virtualenv from auto-updating pip to an incompatible version
export VIRTUALENV_NO_DOWNLOAD=1

exec tox -e py3-old