Pre Commit Git Hook - EsLint

pre-commit

#!/bin/bash

CURDIR=$(git rev-parse --show-toplevel)
ESLINT=$CURDIR/node_modules/.bin/eslint
ESLINTRC=$CURDIR/node_modules/eslint-config-airbnb/.eslintrc
STAGED_FILES=$(git diff --name-only | grep "\.js$")

if [[ $STAGED_FILES = "" ]]
then
  echo "[PRE-HOOK] No files to lint:("
  exit 0
fi

PASS=true

echo "\nValidating Javascript:\n"

# Check for eslint
if [[ ! -x "$ESLINT" ]]; then
  echo "\t\033[41mPlease install ESlint\033[0m (npm i --save --save-exact --dev eslint)"
  exit 1
fi

for FILE in $STAGED_FILES
do
  $ESLINT -c "$ESLINTRC" $FILE"

  if [[ "$?" == 0 ]]; then
    echo "\t\033[32mESLint Passed: $FILE\033[0m"
  else
    echo "\t\033[41mESLint Failed: $FILE\033[0m"
    PASS=false
  fi
done

echo "\nJavascript validation completed!\n"

if ! $PASS; then
  echo "\033[41mCOMMIT FAILED:\033[0m Your commit contains files that should pass ESLint but do not. Please fix the ESLint errors and try again.\n"
  exit 1
else
  echo "\033[42mCOMMIT SUCCEEDED\033[0m\n"
fi