How can I run a virtualenv python script as a git pre-commit hook

Question

This is my pre-commit script:

#!/bin/bash
for f in .git/hooks/pre-commit.d/*; do
    if [ -x "$f" ]; then
        if ! "$f"; then
            echo "DID NOT COMMIT YOUR CHANGES!";
            exit 1
        fi
    fi
done

One of the executables in pre-commit.d is a python script (pre-commit-pylint.py) that starts with:

#!/usr/bin/env python
import pylint

pylint is installed on my virtualenv. My problem is that git runs pre-commit prepending /usr/libexec/git-core:/usr/bin to $PATH, so even if my virtualenv is activated the pre-commit.d/pre-commit-pylint.py script runs with the system /usr/bin/python (instead of running with the virtualenv python).

I want to have hooks that are compatible for developers that are not using virtualenv. Is there any way to run my python script with virtualenv transparently (ie, staying compatible with developers that are using their system python)?

Answer 1

You can check in your pre-commit script for the $VIRTUAL_ENV variable and prepend it to $PATH accordingly:

#!/bin/bash

if [ -n $VIRTUAL_ENV ]; then
    PATH=$VIRTUAL_ENV/bin:$PATH
fi

for f in .git/hooks/pre-commit.d/*; do
    if [ -x "$f" ]; then
        if ! "$f"; then
            echo "DID NOT COMMIT YOUR CHANGES!";
            exit 1
        fi
    fi
done