Please note that the closure linter is deprecated. Esp. if you use ES6 features, the tool will not work for you.
--jscomp_warnings=lintChecksflag. See also https://developers.google.com/closure/utilities/
To install the application, run
python ./setup.py install
After installing, you get two helper applications installed into
gjslint.py- runs the linter and checks for errors
fixjsstyle.py- tries to fix errors automatically