.eslintrc.json

{
  "root": true,
  "env": {
    "es2021": true,
    "node": true,
    "browser": false
  },
  "extends": [
    "eslint:recommended",
    /** @see https://github.com/typescript-eslint/typescript-eslint/tree/master/packages/eslint-plugin#recommended-configs */
    "plugin:@typescript-eslint/recommended",
    "plugin:import/recommended",
    "plugin:import/typescript",
    "plugin:etc/recommended",
    "plugin:sonarjs/recommended-legacy"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": 12,
    "sourceType": "module",
    "warnOnUnsupportedTypeScriptVersion": false,
    "project": [
      "tsconfig.json",
      "tests/tsconfig.json"
    ]
  },
  "overrides": [
    {
      // enable the rule specifically for TypeScript files
      "files": ["*.ts"],
      "rules": {
        "@typescript-eslint/explicit-function-return-type": "error"
      }
    }
  ],
  "settings": {
    "import/resolver": {
      "typescript": true,
      "node": true,
      "eslint-import-resolver-custom-alias": {
        "alias": {
          "/@": "./src",
          "/@gen": "./src-generated"
        },
        "extensions": [".ts"],
        "packages": []
      }
    }
  },
  "plugins": [
    "@typescript-eslint",
    "sonarjs",
    "etc",
    "redundant-undefined",
    "no-null",
    "header",
    "simple-import-sort",
    "unicorn"
  ],
  "ignorePatterns": [
    "node_modules/**",
    "dist/**",
    "builtin/**"
  ],
  "rules": {
    "eqeqeq": "error",
    "@typescript-eslint/explicit-function-return-type": "off",
    "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_", "caughtErrors": "none" }],
    "@typescript-eslint/no-var-requires": "off",
    "@typescript-eslint/consistent-type-imports": "error",
    "@typescript-eslint/no-explicit-any": "error",
    "prefer-promise-reject-errors": "error",
    "@typescript-eslint/await-thenable": "error",
    "@typescript-eslint/no-floating-promises": "error",
    "@typescript-eslint/no-misused-promises": "error",
    "@typescript-eslint/prefer-optional-chain": "error",
    "no-null/no-null": "error",

    /**
     * Having a semicolon helps the optimizer interpret your code correctly.
     * This avoids rare errors in optimized code.
     * @see https://twitter.com/alex_kozack/status/1364210394328408066
     */
    "semi": ["error", "always"],
    /**
     * This will make the history of changes in the hit a little cleaner
     */
    "comma-dangle": ["warn", "always-multiline"],
    /**
     * Just for beauty
     */
    "quotes": ["error", "single", { "allowTemplateLiterals": true }],
    "import/no-duplicates": "error",
    "import/no-unresolved": "off",
    "import/default": "off",
    "import/no-named-as-default-member": "off",
    "import/no-named-as-default": "off",
    "import/first": "error",
    "import/newline-after-import": "error",
    "sonarjs/cognitive-complexity": "off",
    "sonarjs/no-duplicate-string": "off",
    "sonarjs/no-empty-collection": "off",
    "sonarjs/no-small-switch": "off",
    "etc/no-commented-out-code": "error",
    "etc/no-deprecated": "off",
    "redundant-undefined/redundant-undefined": "error",
    "import/no-extraneous-dependencies": "error",
    "header/header": [2, "block", [{ "pattern": "SPDX-License-Identifier: Apache-2\\.0" }]],
    "simple-import-sort/imports": "error",
    "simple-import-sort/exports": "error",
    "unicorn/prefer-node-protocol": "error",
    // redundant with @typescript-eslint/no-unused-vars
    "sonarjs/no-ignored-exceptions": "off",
    "sonarjs/todo-tag": "off",
    // redundant with @typescript-eslint/no-misused-promises
    "sonarjs/no-misused-promises" : "off"
  }
}