.eslintrc

{
  "root": true,
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint", "header", "node", "import", "functional"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:import/typescript"
  ],
  "ignorePatterns": ["node_modules", "lib"],
  "rules": {
    "no-restricted-imports": ["error", {
        "patterns": ["src/*", "*/lib/*"]
    }],
    "@typescript-eslint/explicit-function-return-type": "error",
    "@typescript-eslint/no-explicit-any": "error",
    "header/header": [
      "error",
      "block",
      ["", " * Copyright 2019 - MATTR Limited", " * All rights reserved", " * Confidential and proprietary", " "],
      { "lineEndings": "unix" }
    ],
    "node/no-extraneous-import": "error",
    "no-param-reassign": "error",
    "prefer-object-spread": "warn",
    "no-else-return": "error",
    "import/order": [
      "error",
      {
        "groups": [["builtin", "external"], "internal", "parent", "sibling"],
        "pathGroups": [
          {
            "pattern": "@mattrglobal/**",
            "group": "external",
            "position": "after"
          }
        ],
        // see https://github.com/benmosher/eslint-plugin-import/issues/1565
        "pathGroupsExcludedImportTypes": ["builtin"],
        "alphabetize": {
          "order": "asc"
        },
        "newlines-between": "always"
      }
    ],
    "functional/no-method-signature": "error",
    "functional/immutable-data": "error"
  },
  "overrides": [
    {
      "files": ["./__tests__/**"],
      // Tests usually modify a lot of test objects
      "rules": {
        "functional/immutable-data": "off"
      }
    }
  ]
}