eslint.config.mjs

// @ts-check

import { dirname } from "path";
import { fileURLToPath } from "url";

import { FlatCompat } from "@eslint/eslintrc";
import eslint from "@eslint/js";
import prettierConfig from "eslint-config-prettier";
import eslintCommentsPlugin from "eslint-plugin-eslint-comments";
import * as importPlugin from "eslint-plugin-import";
import tseslint from "typescript-eslint";

const __dirname = dirname(fileURLToPath(import.meta.url));

const compat = new FlatCompat({
  baseDirectory: __dirname,
});

export default tseslint.config(
  {
    files: ["src/**/*.?(c|m)js", "*.?(c|m)js", "src/**/*.ts"],
    extends: [
      eslint.configs.recommended,
      ...compat.extends("plugin:eslint-comments/recommended"),
      ...compat.extends("plugin:import/typescript"),
    ],
    plugins: {
      "eslint-comments": eslintCommentsPlugin,
      "import": importPlugin,
    },
    rules: {
      "eslint-comments/disable-enable-pair": ["error", { allowWholeFile: true }],
      "eslint-comments/no-unused-disable": "error",
      "import/order": ["error", { "newlines-between": "always", "alphabetize": { order: "asc" } }],
      "sort-imports": ["error", { ignoreDeclarationSort: true, ignoreCase: true }],
    },
  },
  {
    files: ["src/**/*.ts"],
    extends: [
      //...tseslint.configs.recommended,
      ...tseslint.configs.strictTypeChecked,
      ...tseslint.configs.stylisticTypeChecked,
    ],
    languageOptions: {
      parserOptions: {
        project: "./tsconfig.test.json",
        tsconfigRootDir: __dirname,
      },
    },
    rules: {
      "@typescript-eslint/explicit-module-boundary-types": "off",

      "@typescript-eslint/no-non-null-assertion": "off",
      "@typescript-eslint/no-unnecessary-condition": "off",
      "@typescript-eslint/restrict-template-expressions": [
        "error",
        {
          allowBoolean: true,
          allowNullish: true,
          allowNumber: true,
        },
      ],
    },
  },
  prettierConfig,
);