eslint: Files to be ignored depend on working directory

I’ve created a minimal reproduction repo here: https://github.com/paleite/eslintignore-bug

Tell us about your environment

Node version: v14.16.1 npm version: v7.12.1 Local ESLint version: v7.30.0 (Currently used) Global ESLint version: Not found Operating System: darwin 20.5.0

What parser (default, @babel/eslint-parser, @typescript-eslint/parser, etc.) are you using?

default

Please show your full configuration:

console.log(`Loaded .eslintrc from the root folder. CWD is ${process.cwd()}`);

module.exports = {
  env: { es6: true, jest: true, node: true },
  extends: "eslint:recommended",
  root: true,
};

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

When running eslint with the same ignore-file from different paths, I expected the ignorefile to behave the same way, but got different results. I used 2 commands:

eslint --config $(git rev-parse --show-toplevel)/.eslintrc.js --ignore-path $(git rev-parse --show-toplevel)/.list-of-ignored-files package-a/

and

cd package-a/ && eslint --config $(git rev-parse --show-toplevel)/.eslintrc.js --ignore-path $(git rev-parse --show-toplevel)/.list-of-ignored-files .

What did you expect to happen?

I expected both commands to have the same result

What actually happened? Please copy-paste the actual, raw output from ESLint.

I got different results

Steps to reproduce this issue:

I’ve created a minimal reproduction repo here: https://github.com/paleite/eslintignore-bug The steps (as detailed in the README.md in that repo) are as follows:

npm install           # Install modules
npm run lint-absolute # Starts ESLint from the git root folder and uses the ignore-file from the git root folder
npm run lint-relative # Starts ESLint from a subfolder and uses the ignore-file from the git root folder

Are you willing to submit a pull request to fix this bug?

Yes.

Hopefully this is a good candidate for a new contributor.