Running jshint and npm test in pre-commit git hook

pre-commit

#/bin/sh
#
# ...
#
# The pre-commit.sample template prefixes `git diff-index` with exec.
# This is a convenient way to make pre-commit exit with the status of this
# command, but we need to strip the exec prefix if we want to run other commands
# after git diff-index.
#
git diff-index --check --cached $against -- || exit 1


# Pass through the linter
jshint *.js || exit 1


# Run tests
npm test || exit 1