run.sh

#!/bin/bash

PYTHON=python
VENV_NAME=_echo360venv

error_exit(){
    echo "$1" 1>&2
    exit 1
}
error_clean_exit(){
    echo Try again later! Removing the virtual environment dir...
    [ -e $VENV_NAME ] && rm -r $VENV_NAME
    error_exit "$1" 1>&2
}

cd "`dirname \"$0\"`"  # go to the script directory
if $PYTHON -c 'import sys; sys.exit(1 if sys.hexversion<0x03000000 else 0)'; then
    VENV=venv  # using python 3
else
    VENV=virtualenv  # using python 2
    $PYTHON -c "import $VENV" || $PYTHON -m pip install --user $VENV >/dev/null 2>&1
fi
# Check if virtual environment had been created
if [ ! -d "$VENV_NAME" ]; then
  echo Checking pip is installed
  $PYTHON -m ensurepip --default-pip >/dev/null 2>&1
  $PYTHON -m pip >/dev/null 2>&1
  if [ $? -ne 0 ]; then
    echo pip is still not installed!...
    echo Try to install it with sudo?
    echo Run: \"sudo $PYTHON -m ensurepip --default-pip\"
    exit 1
  fi
  echo Creating python virtual environment in "$VENV_NAME/"...
  $PYTHON -m $VENV $VENV_NAME || error_exit "Failed to create virtual environment"
  source $VENV_NAME/bin/activate || error_exit "Failed to source virtual environment"
  echo Upgrading pip...
  $PYTHON -m pip install --upgrade pip
  echo Installing all pip dependency inside virtual environment...
  $PYTHON -m pip install -r requirements.txt || error_clean_exit "Something went wrong while installing pip packages"
fi

source $VENV_NAME/bin/activate || error_exit "Failed to source virtual environment (try to delete '$VENV_NAME/' and re-run)"

$PYTHON echo360.py "$@"