feat: migrate to FlatConfig

[yoshinorin]

Refs: #55

check list

• Add test cases for the changes.
• Passed the CI test.

Usage

// Before FlatConfig
{
  "root": true,
  "extends": "hexo/ts.js",
  "parserOptions": {
    "sourceType": "module",
    "ecmaVersion": 2020
  },
  "rules": {
    "@typescript-eslint/no-explicit-any": 0,
    "@typescript-eslint/ban-ts-comment": 0,
    "@typescript-eslint/no-this-alias": 0
  }
}

// After
// In `eslint.config.js`
const hexoTsLint = require('eslint-config-hexo/ts');

module.exports = [
  ...hexoTsLint,
  {
    languageOptions: {
      ecmaVersion: 2022,
    },
    rules: {
      "@typescript-eslint/no-explicit-any": 0,
      "@typescript-eslint/ban-ts-comment": 0,
      "@typescript-eslint/no-this-alias": 0
    }
  }
];

[SukkaW]

Since we are creating new presets, it is a good chance for us to add a few more presets. E.g. we could add https://www.npmjs.com/package/eslint-plugin-mocha since almost all Hexo repos use mocha.

Note that we might need to disable a few rules (E.g. mocha/no-mocha-arrows since we all use arrow functions).

[uiolee]

need "type": "module", or name js file to mjs

Oops! Something went wrong! :(

ESLint: 9.11.1

/home/user/eslint-config-hexo/eslint.js:1
import nodePlugin from 'eslint-plugin-n';
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at internalCompileFunction (node:internal/vm:77:18)
    at wrapSafe (node:internal/modules/cjs/loader:1288:20)

[SukkaW]

Then keep using const = require then. In the ESLint world, CommonJS is still the first-class citizen.

[yoshinorin]

@hexojs/core
Sorry for the delay in implementing the changes (I'm currently very busy with personal matters...) and perhaps ready for review.

Thanks :)

[stevenjoezhang]

Tested in hexojs/hexo-renderer-marked#306

[stevenjoezhang]

Some tests failed here: hexojs/hexo#5599
Need fix

[yoshinorin]

Some tests failed here: hexojs/hexo#5599
Need fix

Coverage collection has failed, but all other tests have passed. The eslint changes are unrelated to the test results.

[uiolee]

this will overwrite the rules in mochaPlugin.configs.flat.recommended, please make sure this meets your expectations

[yoshinorin]

Yes, this override is correct. I read the rules in README and configured the overrides to ignore specific settings in our test code. For example, we use allow functions in our test code, but in the eslint-plugin-mocha recommended configuration, this is a warning by default.

[uiolee]

Such naming may be confusing

[yoshinorin]

Done.
0544bdd

Personally, I think it would be better to rename the file itself from eslint.js. If we were to align it with other file names, it would be js.js, but I don't think that’s a good choice for naming.