grunt jshint pre-commit hook

pre-commit.sh

#!/bin/sh
# This pre-commit hook prevents lint errors from getting committed
# Requires jshint and grunt
jshintout=$(/usr/local/bin/grunt jshint)
exitcode=$?

files=$(git diff --cached --name-only --diff-filter=ACM | grep "\.js$")
if [ "$files" = "" ]; then
        exit 0
fi

if [ $exitcode -eq 0 ]; then
    echo "Jshint passed"
else
    echo "Commit failed, please fix your hint errors"
    echo "$jshintout"
    exit 1
fi

# Redirect output to stderr.
exec 1>&2