Run black and flake8 before each commit. Error on flake8 error

pre-commit

#!/usr/bin/env sh
# Pre commit hook

# autoformat
black -q .

# lint
flake_out="$(flake8 .)"
flake_code=$?

if [ $flake_code -ne 0 ]
then
    echo "Pre-commit hook: flake8 exited with code $flake_code"
    echo "$flake_out"
    exit $flake_out
fi

exit 0

# Note: config for black and flake8 can be passed through relevant config files in the root directory of the repository