Idiomatic ESLint

.eslintrc

//Put this in your home directory...  Unless you need project specific settings
{
  "extends": "idiomatic",
  "rules": {
    "quotes": ["warn","double"],
    "space-in-parens": ["warn","never"],
    "array-bracket-spacing": ["warn","never"],
    "computed-property-spacing": ["warn","never"],
    "one-var-declaration-per-line": ["warn","initializations"],
    "semi": ["error","always",{
      "omitLastInOneLineBlock": false
    }],
    "one-var": ["warn",{
      "initialized": "never",
      "uninitialized": "always"
    }],
    "indent": ["warn", 2, {
      "SwitchCase": 1
    }]
  }
}

setup.sh

npm install -g eslint@5.x https://github.com/BrandExtract/eslint-config-idiomatic.git

# You can add the following command in your crontab to update automagically.
curl "https://gist.githubusercontent.com/jlafitte/ccc695f244ceb473a530fbdc130c0296/raw/.eslintrc" > ~/.eslintrc

# cron example
# 0 12 * * *	curl -s "https://gist.githubusercontent.com/jlafitte/ccc695f244ceb473a530fbdc130c0296/raw/a863715446f948a06eeef73279e999cbb600b465/.eslintrc" > ~/.eslintrc