Reinstall virtualenv with tox when requirements.txt or setup.py changes

Question

Previously I was manually using a Makefile that looked something like this:

.PHONY: all
all: tests

.PHONY: tests
tests: py_env
    bash -c \'source py_env/b         


        

Answer 1

Determined to solve this, I've written a tox plugin to accomplish this: https://github.com/asottile/tox-pip-extensions

The plugin hooks into virtualenv creation and uses venv-update to keep dependencies in sync.

The usage is pretty straightforward:

• install tox-pip-extensions alongside tox (in my setup, I have a virtualenv at ~/venv with tox and tox-pip-extensions installed, and then symlinked ~/venv/bin/tox -> ~/bin/tox)

• enable the extension as follows:

  [tox]
  tox_pip_extensions_ext_venv_update = true
  # the rest of your tox.ini file as normal...