virtenv

#!/bin/bash
#
# Copyright (c) 2018-2020 by Kristoffer Paulsson <kristoffer.paulsson@talenten.se>.
#
# This software is available under the terms of the MIT license. Parts are licensed under
# different terms if stated. The legal terms are attached to the LICENSE file and are
# made available on:
#
#     https://opensource.org/licenses/MIT
#
# SPDX-License-Identifier: MIT
#
# Contributors:
#     Kristoffer Paulsson - initial implementation
#

HELP=$(cat << EOF
Use "virtenv" to handle a Python 3.x virtual environment for Angelos.

  > virtenv ( setup | start | stop )

  SETUP: Creates a new virtual environment and upgrades pip, setuptools
  and wheel to latest version, then install requirements and setup
  Angelos in development mode.
  START: Starts an already existent virtual environment.
  STOP: Stops an already running virtual environment.

EOF
)

[ -z ${VIRTUAL_ENV} ] && IN_VENV=1 || IN_VENV=0

case $1 in
  setup)
    [ $IN_VENV ] && echo "Already inside a virtual environment!" && exit 1
    python3 -m virtualenv venv -p /usr/bin/python3
    source venv/bin/activate
    pip install pip --upgrade
    pip install setuptools --upgrade
    pip install wheel --upgrade
    pip install -r requirements.txt
    pip install -e .
    ;;
  start)
    [ $IN_VENV ] && echo "Already inside a virtual environment!" && exit 1
    source venv/bin/activate
    ;;
  stop)
    ! [ $IN_VENV ] && echo "No active virtual environment!." && exit 1
    deactivate
    ;;
  *)
    echo "$HELP"
    exit 1
    ;;
esac