tasks.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import shutil

from invoke import task, run

HERE = os.path.abspath(os.path.dirname(__file__))
# Match default value of app_name from cookiecutter.json
COOKIE = os.path.join(HERE, 'myflaskapp')
REQUIREMENTS = os.path.join(COOKIE, 'requirements', 'dev.txt')

@task
def build():
    run('cookiecutter {0} --no-input'.format(HERE))

@task
def clean():
    if os.path.exists(COOKIE):
        shutil.rmtree(COOKIE)
        print('Removed {0}'.format(COOKIE))
    else:
        print('App directory does not exist. Skipping.')

@task(pre=[clean, build])
def test():
    run('pip install -r {0}'.format(REQUIREMENTS), echo=True)
    run('python {0} test'.format(os.path.join(COOKIE, 'manage.py')), echo=True)