In this episode, talk about how I created my own virtualenvwrapper-like interface using Fish Shell.

Fish Shell is "a smart and user-friendly command line shell for macOS, Linux, and the rest of the family. It excels in tab completion and ease of use, but virtualenvwrapper does not support it.

Virtualenvwrapper, like the name suggests, is a wrapper around python's virtualenv functionality, which allows you to use different versions of python packages in separate environments. To learn more, listen to BJB's show called A bit of background on virtualenvwrapper.

Functions and aliases in my fish config file:

# Set virtual directory root

export set WORKON_HOME=$HOME/Envs

# List virtual environments

alias lsenvs="ls -m $WORKON_HOME | sed 's////g'"

# Create python2 virtual environment

function -d "Like virtualenvwrapper for python2" mkvirtualenv2

virtualenv -p python2 $WORKON_HOME/$argv;

and source $WORKON_HOME/$argv/bin/activate.fish;

and echo "Virtual environment created."

end

# Create python3 virtual environment

function -d "Like virtualenvwrapper" mkvirtualenv

virtualenv -p python3 $WORKON_HOME/$argv;

and source $WORKON_HOME/$argv/bin/activate.fish;

and echo "Virtual environment created."

end

# Source a virtual environment

function workon

source $WORKON_HOME/$argv/bin/activate.fish; and echo "Switch to virtual environment."

end

# Delete a virtual environment

function -d "Like virtualenvwrapper" rmvirtualenv

if test -n "$VIRTUAL_ENV"

deactivate

end

rm -rf $WORKON_HOME/$argv; and echo "Virtual environment deleted."

end