This script will automatically switch to a Python virtual environment after you cd into a Python project, then deactivate when you leave. Inspired by a similar script from Justin Abrahms.
Install virtualenvwrapper.
Download the auto_virtualenv.sh script, and put it in your home directory (~/).
Run the following:
chmod a+x ~/auto_virtualenv.sh
echo "source ~/auto_virtualenv.sh" >> ~/.bash_profile| #!/bin/bash | |
| # virtualenvwrapper setup | |
| VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3 | |
| export WORKON_HOME=~/Envs | |
| mkdir -p $WORKON_HOME | |
| source /usr/local/bin/virtualenvwrapper.sh | |
| # search recursively for a file in the current directory and all parent directories | |
| function upsearch() | |
| { | |
| # adapted from http://stackoverflow.com/a/7614803/358804 | |
| find `( CP=${PWD}; while [ -n "$CP" ] ; do echo $CP; CP=${CP%/*}; done; echo /)` -mindepth 1 -maxdepth 1 -type f -name $1 | |
| } | |
| function auto_virtualenv() | |
| { | |
| # check if directory changed | |
| if [ "$PWD" != "$MYOLDPWD" ]; then | |
| MYOLDPWD="$PWD" | |
| REQUIREMENTS_PATH=$(upsearch requirements.txt) | |
| if [[ "$REQUIREMENTS_PATH" ]]; then | |
| # in a Python project | |
| # http://stackoverflow.com/a/34109556/358804 | |
| CURRENT_PROJECT=$(awk -F/ '{ print $(NF-1) }' <<< "$REQUIREMENTS_PATH") | |
| OLD_PROJECT=${VIRTUAL_ENV##*/} | |
| # check if the project has changed, since `workon` is slow | |
| if [ "$CURRENT_PROJECT" != "$OLD_PROJECT" ]; then | |
| workon "$CURRENT_PROJECT" | |
| fi | |
| elif [ -n "$VIRTUAL_ENV" ]; then | |
| # left a Python project | |
| deactivate | |
| fi | |
| fi | |
| } | |
| # bash hook | |
| PROMPT_COMMAND='auto_virtualenv' | |
| # Mirrored support for zsh. See: https://superuser.com/questions/735660/whats-the-zsh-equivalent-of-bashs-prompt-command/735969#735969 | |
| function precmd() | |
| { | |
| eval "$PROMPT_COMMAND" | |
| } |