start-virt-env

#!/bin/bash

REQ_PYTHON_MAJ=3
REQ_PYTHON_MINOR=8

FROM_RUN=""
if [ "$1" == "--from-run" ];  then
  FROM_RUN="yes"
fi

export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3
export WORKON_HOME=$PWD/.virtualenvs
export PROJECT_HOME=$PWD

RED_COLOR='\033[0;31m'
NO_COLOR='\033[0m' 

if [ -f /usr/share/virtualenvwrapper/virtualenvwrapper.sh ]; then
  export VIRTUALENVWRAPPER_VIRTUALENV=/usr/bin/virtualenv
  source /usr/share/virtualenvwrapper/virtualenvwrapper.sh
elif [-f ~/.local/bin/virtualenvwrapper.sh ]; then
  export VIRTUALENVWRAPPER_VIRTUALENV=~/.local/bin/virtualenv
  source ~/.local/bin/virtualenvwrapper.sh
else
 echo -e "${RED_COLOR}ERROR${NO_COLOR} cannot not find virtualen. Please install it"
 exit 1
fi

if ! workon | grep -q run_env; then
  mkvirtualenv -r requirements.txt run_env
fi

workon run_env

alias d=deactivate

if ! python -c "import sys; sys.exit(0) if sys.version_info.major == $REQ_PYTHON_MAJ and sys.version_info.minor >= $REQ_PYTHON_MINOR else sys.exit(1)"; then
  >&2 echo -e "${RED_COLOR}ERROR${NO_COLOR} Require pyhon >= ${REQ_PYTHON_MAJ}.${REQ_PYTHON_MINOR} Exit from virtual env"
  deactivate
  (return 0 2>/dev/null) && return 1
fi

if [ "$FROM_RUN" == "" ]; then
  echo "Virtual environment has been started. Use 'deactivate' or 'd' for exit"
fi