##############################################################################
echo "---> tox-install.sh"
-# Ensure we fail the job if any steps fail.
-# DO NOT set -u as virtualenv's activate script has unbound variables
-set -e -o pipefail
+# Ensure we fail the job if any steps fail or variables are missing.
+# Use -x to show value of $PYTHON in output
+set -eux -o pipefail
-python -m pip install --user --quiet --upgrade argparse detox "tox<3.0.0" tox-pyenv
+python3 -m pip install --user --quiet --upgrade tox tox-pyenv virtualenv
-echo "----> pip freeze"
-pip freeze
+# installs are silent, show version details in log
+$PYTHON --version
+$PYTHON -m pip --version
+$PYTHON -m pip freeze