n3dst4 / eslint-exit-codes

minimal demo of eslint exit codes

Minimal demo of ESLint exiting with nonzero exit codes if any warnings are found.

Assuming you have nodejs installed (https://nodejs.org/en/):

cd eslint-exit-codes
npm install

will install eslint locally in this folder.

npm run good

Will run eslint on a file with no warnings

npm run bad

will run eslint on a file with a couple of warnings. Npm will complain loudly about the exit code.

If you open bad.js in Emacs with flycheck and add-node-modules-path, eslint will run but complain with:

Suspicious state from syntax checker javascript-eslint: Flycheck checker javascript-eslint returned non-zero exit code 1, but its output contained no errors: <?xml version="1.0" encoding="utf-8"?><checkstyle version="4.3"><file name="c:/git/eslintfu/good.js"><error line="4" column="1" severity="error" message="Too many blank lines at the end of file. Max of 0 allowed. (no-multiple-empty-lines)" source="eslint.rules.no-multiple-empty-lines" /></file></checkstyle>

Try installing a more recent version of javascript-eslint, and please open a bug report if the issue persists in the latest release.  Thanks!

You can replicate this again by opening good.js (no errors) and breaking it in some way.