Create a virtual environment for developers to use Airflow

airflow_virtenv.sh

#!/bin/bash

# Purpose: Setup local Airflow Python development environment
# Author: Adam Whitlock (adam@adamwhitlock.com)
# Version: 0.0.1

# Specify major version of Python used for Airflow
PYTHON_VERSION="2"
AIRFLOW_VERSION="1.10.1"

# Export this value to prevent issues with GPL code use 
export SLUGIFY_USES_TEXT_UNIDECODE=yes

# If the virtualenv is present, give the option to remove
if [[ -d ./venv ]]; then
	printf "Virtual environment already exists. Remove? (Y/N): "
	read remove_virtenv
	while true; do
		case $remove_virtenv in
		    Y|y) rm -rf ./venv; echo "Removed!"; break ;;
		    N|n) echo "Skipped!"; VIRTEXIST=true break ;;
		    *) echo "Skipped!"; break ;;
		esac
	done
fi

printf "Setting up virtual environment for Airflow development:\n\n"

if [[ $PYTHON_VERSION -eq "2" ]]; then
	PIP="pip"
elif [[ $PYTHON_VERSION -eq "3" ]]; then
	PIP="pip3"
fi

# Check if Python version in PATH
if [[ `command -v python${PYTHON_VERSION}  > /dev/null 2>&1` -ne 0 ]]; then
	echo "Unable to find specified version of Python in PATH: python${PYTHON_VERSION}"
	exit 1
fi
echo "python PATH validated..."

# Check if pip in PATH
if [[ `command -v ${PIP}  > /dev/null 2>&1` -ne 0 ]]; then
	echo "Unable to find specified version of Pip in PATH: ${PIP}"
	exit 1
fi
echo "pip PATH validated..."


# Check if virtualenv in PATH
if [[ `command -v virtualenv  > /dev/null 2>&1` -ne 0 ]]; then
	echo "Unable to find specified virtualenv in PATH"
	exit 1
fi
echo "virtualenv PATH validated..."
printf "\n\n"


# Create virtualenv
virtualenv -p `which python${PYTHON_VERSION}` venv


printf "\n\n\nTo use your Airflow virtual environment, source the virtualenv
file using \"source venv/bin/activate\" and to leave the environment, use
the \"deactivate\" command.\n\n!"

printf "Would you like to install Airflow in your environment (Y/N): "

read install_airflow
while true; do
	case $install_airflow in
	    Y|y) source venv/bin/activate && ${PIP} install apache-airflow==${AIRFLOW_VERSION}; break ;;
	    N|n) echo "Thank you!"; break ;;
	    *) echo "Not activating at this time. You will have to activate manually."; break ;;
	esac
done