Run JSHint validation before commit.

pre-commit

#!/bin/sh
#
# Run JSHint validation before commit.
#
# Originally: http://stackoverflow.com/a/21238963/302550
# 
# Requires Node (http://nodejs.org/) and jshint (https://www.npmjs.org/package/jshint) 
# be globally installed (e.g.: npm install jshint -g).
#
# Edited slightly to make it easier to work with Git GUIs (e.g. PHPStorm IDE, Tower).
# End user must edit the BIN_PATH to ensure the node binary is found and 
# the NPM_MODULES_PATH to ensure the global jshint node module is found.
#
# If you plan to use only on your CLI, then the first 4 lines may be removed.
#
BIN_PATH="/usr/local/bin"
NPM_MODULES_PATH="/usr/local/share/npm/bin"

PATH="$BIN_PATH:$NPM_MODULES_PATH:$PATH"
files=$(git diff --cached --name-only --diff-filter=ACMR -- *.js **/*.js)
pass=true

if [ "$files" != "" ]; then
    for file in ${files}; do
        result=$(jshint ${file} --config=/Users/username/projects/my-awesome-project/.jshintrc)

        if [ "$result" != "" ]; then
            echo "$result"
            pass=false
        fi
    done
fi

if $pass; then
    exit 0
else
    echo ""
    echo "COMMIT FAILED:"
    echo "Some JavaScript files are invalid. Please fix errors and try again."
    exit 1
fi