Pre commit hook for a rails project that uses yarn

pre-commit

#!/bin/sh

RUBOCOP_NAMES='\.(rb|rake)$'
ESLINT_NAMES='\.(es6|jsx|js)$'
PRETTIER_NAMES='\.(es6|jsx|js|scss|json)$'

RUBOCOP_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep -E $RUBOCOP_NAMES)
ESLINT_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep -E $ESLINT_NAMES)
PRETTIER_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep -E $PRETTIER_NAMES)

if [[ ! -z $RUBOCOP_FILES ]]
then
  echo "===Running Rubocop==="
  echo $RUBOCOP_FILES | xargs bundle exec rubocop -a --force-exclusion || exit 1
  echo $RUBOCOP_FILES | xargs git add
fi

if [[ ! -z $ESLINT_FILES ]]
then
  echo "===Running Eslint==="
  echo $ESLINT_FILES | xargs ./node_modules/.bin/eslint --fix || exit 1
  echo $ESLINT_FILES | xargs git add
fi

if [[ ! -z $PRETTIER_FILES ]]
then
  echo "===Running Prettier==="
  echo $PRETTIER_FILES | xargs ./node_modules/.bin/prettier --write || exit 1
  echo $PRETTIER_FILES | xargs git add
fi

echo "===Linting passed==="