A pre-commit hook for clearing output from jupyter notebooks

precommit_notebook_clearing.bash

#!/bin/bash

# Find staged files | filter for notebooks | substitute spaces for newlines
notebooks=$( git diff --staged --name-only | grep .ipynb | tr '\n' ' ')

# If there are staged notebooks, clear them and re-add them
if [ -n "$notebooks" ]; then
    jupyter nbconvert --ClearOutputPreprocessor.enabled=True --inplace $notebooks
    git add $notebooks
fi