eslint.config.mjs

import path from "node:path";
import { fileURLToPath } from "node:url";

import { fixupPluginRules } from "@eslint/compat";
import { FlatCompat } from "@eslint/eslintrc";
import js from "@eslint/js";
import typescriptEslint from "@typescript-eslint/eslint-plugin";
import tsParser from "@typescript-eslint/parser";
import prettier from "eslint-plugin-prettier/recommended";
import globals from "globals";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const compat = new FlatCompat({
  baseDirectory: __dirname,
  recommendedConfig: js.configs.recommended,
  allConfig: js.configs.all,
});

function legacyPlugin(name, alias = name) {
  const plugin = compat.plugins(name)[0]?.plugins?.[alias];

  if (!plugin) {
    throw new Error(`Unable to resolve plugin ${name} and/or alias ${alias}`);
  }

  return fixupPluginRules(plugin);
}

export default [
  ...compat.extends(
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended"
  ),
  {
    // eslint v9 requires this to be in a separate config option for ??reasons??
    ignores: ["dist/**/*"],
  },
  prettier,
  {
    plugins: {
      "@typescript-eslint": typescriptEslint,
      "import": legacyPlugin("eslint-plugin-import", "import"),
    },

    languageOptions: {
      globals: {
        ...globals.node,
      },

      parser: tsParser,
      ecmaVersion: 12,
      sourceType: "module",
    },

    rules: {
      "quotes": [
        2,
        "double",
        {
          avoidEscape: true,
          allowTemplateLiterals: true,
        },
      ],

      "@typescript-eslint/no-unused-vars": "off",
      "@typescript-eslint/consistent-type-imports": [
        "error",
        {
          fixStyle: "inline-type-imports",
        },
      ],

      "import/order": [
        "error",
        {
          "groups": [
            "builtin",
            "external",
            "internal",
            "parent",
            "sibling",
            "index",
          ],
          "newlines-between": "always",
          "alphabetize": { order: "asc" },
        },
      ],
      "import/first": "error",
      "import/extensions": ["error", "ignorePackages"],
    },
  },
];