Emacs Tox Integration | Notes to self

I am a heavy user of tox. Every new project has one and it is not only because I can keep my dependencies and tools configuration in one place but also because I have a nice integration with Emacs.

I press f4 and select the test environment to use.

  (global-set-key [f4] 'sp/tox/activate-current-project-tox-env)

Powerful combo of tox, projectile, and helm.

(defun sp/tox/find-tox-dirs-in-project (project-root-dir)

  (defun -find-toxenv-bin-dirs (root)
    (projectile-files-via-ext-command
     root
     (format "find %s -type d -name 'bin' -path '*/.tox/*/bin' -print0" root)))

  (-map (lambda (file) (sp/path/parent-dir (sp/path/parent-dir file)))
        (-find-toxenv-bin-dirs project-root-dir)))

(defun sp/tox/activate-current-project-tox-env ()
  (interactive)
  (let* (
         (venv-dirs (sp/tox/find-tox-dirs-in-project (projectile-project-root)))
         (venv-dirs-length (length venv-dirs)))
    (progn
      (venv-set-location
       (if (> venv-dirs-length 1)
           (helm-comp-read "Choose tox directory to workon" venv-dirs)
         (if (= venv-dirs-length 0)
             (error "The project doesn't have created tox virtual environments.")
           (car venv-dirs))))
      (venv-workon)
      (add-to-list 'python-shell-extra-pythonpaths (projectile-project-root))
      (add-to-list 'python-shell-extra-pythonpaths (format "%s/src" (projectile-project-root)))
      )))