postactivate.sh

#!/bin/zsh -w
# This hook is run after this virtualenv is activated.

# If the virtualenv has a .project file in it then check to see the
# path contained within it exists, and if so collect etags for .py
# files in that path.  Also includes etags generated for the
# virtualenv itself—if it finds them.  Virtualenv tags are generated
# with the `venvtags` function defined in .zshrc: which should be run
# manually after, for example, installing new requirements.  The
# resulting TAGS file is then hooked into the virtualenv by a
# .dir-locals.el file—which is created if it does not already
# exist—located at the project root.
PROJDIRFILE="${VIRTUAL_ENV}/${VIRTUALENVWRAPPER_PROJECT_FILENAME}"
if [ -f $PROJDIRFILE ] && [ -s $PROJDIRFILE ]
then
    echo Running etags on project dir…
    VENV_TAGS="${VIRTUAL_ENV}/TAGS"
    if [ ! -z $VENV_TAGS ] && [ -f $VENV_TAGS ]
    then
        # venv tags already exist, so include them
        ETAGS_VENV_INCLUDE="--include=$VENV_TAGS"
    fi
    find -L `cat $PROJDIRFILE` -type f -name "*.py" | xargs etags $ETAGS_VENV_INCLUDE -o `cat $PROJDIRFILE`/TAGS
    # if the projectdir doesn't contain a .dir-locals.el file, create
    # one to set tags-file-name variable to the TAGS file we just made
    # (so that trying to visit a tag doesn't prompt for one).
    if [ ! -f `cat $PROJDIRFILE`/.dir-locals.el ]
    then
        echo Setting up initial .dir-locals.el…
        DIRLOCALS_EL="((nil . ((tags-file-name . \"`cat ${PROJDIRFILE}`/TAGS\" ))))"
        echo $DIRLOCALS_EL > `cat $PROJDIRFILE`/.dir-locals.el
    fi
fi