Tracking project virtual environments with pyvenv-tracking-mode
First of all, you need to install pyvenv-mode. This package is a
dependency of elpy and is installed when you execute
(package-install 'elpy)
Elpy is a great mode for editing Python, and I would strongly recommend using it.
To set up pyvenv-tracking-mode, add the following to your init file
(you should have use-package installed):
(use-package pyvenv
:ensure t
:init
(setenv "WORKON_HOME" "~/miniconda3/envs/")
(pyvenv-mode 1)
(pyvenv-tracking-mode 1))
The WORKON_HOME variable should be set to the conda directory
containing your environments. This use-package declaration enables
pyvenv-mode and pyvenv-tracking-mode.
Now, when you are in a project buffer, execute
add-dir-local-variable. It will first prompt for the mode (in which
the local variable will be set), then which variable to set, and
finally the value of the variable. The mode should obviously be
python, the variable you should set is pyvenv-workon, and the value
is a string value "my-conda-environment". Note that the quotes are
important, because the variable can only be set to a string
value.
Emacs will look for .dir-locals.el file in all parent directories of
the current file, so it is possible to put the .dir-locals.el file
in the project root directory.
If you reload the project buffer (M-x revert-buffer), the
environment will automatically change. Moreover, whenever you switch
to this buffer in the future, the environment will be set correctly.
