Rubocop pre-commit

pre-commit

#!/bin/bash
# move to `.git/hooks/pre-commit`; run `chmod +x .git/hooks/pre-commit`
set -e

files=$(git diff --staged --name-only --diff-filter=ACMRTUXB | grep '\.rb$' | tr '\\\n' ' ')

# Check we have files before trying to run the tests.
# Prevents getting stuck if we only update non .rb files.
if [[ -n $files ]];then
	git diff --staged --name-only --diff-filter=ACMRTUXB | grep '\.rb$' | tr '\\\n' ' ' | xargs --no-run-if-empty bundle exec rubocop -A --config "$(git rev-parse --show-toplevel)/.rubocop.yml"
fi