parserOptions.project should be nullable

[Dimava]

Trying to make ESLint lint AND ts-check itself, I encountered the error

Parsing error: ESLint was configured to run on <tsconfigRootDir>/.eslintrc.cjs using parserOptions.project: /tsconfig.json
However, that TSConfig does not include this file. Either:

• Change ESLint's list of included files to not include this file
• Change that TSConfig to include this file
• Create a new TSConfig that includes this file and include it in your parserOptions.project
  See the typescript-eslint docs for more info: https://typescript-eslint.io/linting/troubleshooting#i-get-errors-telling-me-eslint-was-configured-to-run--however-that-tsconfig-does-not--none-of-those-tsconfigs-include-this-fileeslint

Alternatively, you can add parserOptions: { project: null } to an override for the files you wish to exclude. Note that { project: undefined } will not work.

Which could be fixed with

  overrides: [{
    "files": [".eslintrc.cjs"],
    parserOptions: { project: null /* <- add nul*/ },
  }],

Which requires parserOptions.project to be nullable as per above link

[Shinigami92]

5b73f49