git pre-commit hook for lint-checking

pre-commit

#!/bin/sh
# Place me in ".git/hooks", replacing the original file if one exists.

# Stashing all non-staged changes so the lint will only run on staged changes.
# Assuming the already-commited code is always linted before commiting,
# this code assures that the upcoming commits will also be linted.
git stash -k -u > /dev/null

# This code assumes here you have some `make` commands for checking/reporting/fixing the linting of the code.
# You can change these to the commands of your choice. 
# It is recommended to NOT lint the code automatically, but let the user decide what 
# to do if the code is not linted to prevent automatically-added bugs 
# and to allow the `git stash pop` command to always succeed.
if ! make check-lint; then
    make report-lint
    echo "Can't commit changes - there are lint errors. Run 'make fix-lint' to fix issues and try again." >&2
    EXIT_CODE=1
else
    EXIT_CODE=0
fi
git stash pop > /dev/null
exit $EXIT_CODE