How to Get the List of the Files Processed by ESLint

I once needed that to debug the issue of why ESLint was so slow, and I thought I would share this piece of information.

To get the list of the files ESLint processes, set the DEBUG environment variable to eslint:cli-engine.

Like this:

DEBUG=eslint:cli-engine eslint .

The output will look something like this:

  eslint:cli-engine Lint /home/volodymyr/github/mocha-reporter-sonarqube/lib/index.ts +0ms
  eslint:cli-engine Lint /home/volodymyr/github/mocha-reporter-sonarqube/test/index.spec.ts +3s
  eslint:cli-engine Linting complete in: 8118ms +349ms