This repostory contains a ZSH plugin which automatically activates Python virtual environments when entering their parent directory.
The script create_examples.sh can generate some example directories which
also act as test cases. Try doing something like this:
source autovenv.plugin.zsh
./create_examples.sh
cd example-basic/
cd ..The heart of this plugin is the following table, corresponding to the logic in
_autovenv_update.
No active venv (deactivate is unset)** |
Active venv (deactivate is set)** |
|
|---|---|---|
| PWD has virtual environment | Activate it | Switch if they aren't the same* |
| PWD has no virtual environment | Do nothing | Deactivate it |
* The path of the virtual environment discovered from $PWD is compared to
the one specified by $VIRTUAL_ENV. If they are dissimilar, the latter is
deactivated and the former is activated.
** deactivate is the shell function which the setup script in .venv/bin/activate defines.
We use it as an indicator of whether there is an active virtual environment.
See this commit if you're curious about why we don't just use $VIRTUAL_ENV.
The rest of the logic should be pretty clear from the source code (as clear as shell script can be, that is).