#!/bin/bash
# Test that installation of all dependencies works fine if versions are set to
# the minimum ones.

set -e

if [ -n "$VIRTUAL_ENV" ]; then
    echo "This script will create its own virtualenv - please don't run it inside an existing one." >&2
    exit 1
fi

cd "$(hg root)"

venv=build/minimum-dependency-versions-venv
log=build/minimum-dependency-versions.log
min_requirements=build/minimum-dependency-versions-requirements.txt
echo "virtualenv: $venv"
echo "log: $log"
echo "minimum requirements file: $min_requirements"

# clean up previous runs
rm -rf "$venv" "$log"
mkdir -p "$venv"

# Make a light weight parsing of setup.py and dev_requirements.txt,
# finding all >= requirements and dumping into a custom requirements.txt
# while fixating the requirement at the lower bound.
sed -n 's/.*"\(.*\)>=\(.*\)".*/\1==\2/p' setup.py > "$min_requirements"
sed 's/>=/==/p' dev_requirements.txt >> "$min_requirements"

python3 -m venv "$venv"
source "$venv/bin/activate"
pip install --upgrade pip setuptools
pip install -e . -r "$min_requirements" python-ldap python-pam 2> >(tee "$log" >&2)

# Treat any message on stderr as a problem, for the caller to interpret.
if [ -s "$log" ]; then
    echo
    echo "Error: pip detected following problems:"
    cat "$log"
    echo
    exit 1
fi

freeze_txt=build/minimum-dependency-versions.txt
pip freeze > $freeze_txt
echo "Installation of minimum packages was successful, providing a set of packages as in $freeze_txt . Now running test suite..."

pytest

echo "Test suite execution was successful."
echo "You can now do additional validation using virtual env '$venv'."