.eslintrc

{
  "extends": ["plugin:import/warnings", "plugin:import/typescript", "plugin:unicorn/recommended"],
  "plugins": ["@typescript-eslint", "import", "promise", "unicorn"],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "parser": "@typescript-eslint/parser",
    "sourceType": "module",
    "ecmaVersion": 12
  },
  "rules": {
    "prefer-const": "error",
    "semi": ["error", "always"],
    "quotes": ["warn", "double", { "avoidEscape": true, "allowTemplateLiterals": true }],
    "no-unused-vars": "off",
    "curly": "error",
    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
    // our use of `-spec` files for testing prevents us using this
    "unicorn/filename-case": "off",
    // reduce has been getting a bad rap lately; its true that often
    // a filter or map would be clearer and equally as effective but
    // there are still some legit cases to use reduce
    "unicorn/no-array-reduce": "off",
    "unicorn/prevent-abbreviations": "off",
    "unicorn/no-null": "off",
    "no-nested-ternary": "off",
    // doesn't play well with prettier
    "unicorn/no-nested-ternary": "off",
    // this is kind of nice sometimes
    "unicorn/no-array-callback-reference": "off",

    // we need exceptions to be only "warn" because
    // there are valid use cases for generic variables being
    // used before being defined
    "no-use-before-define": ["warn"],
    "@typescript-eslint/semi": ["error", "always"],
    "@typescript-eslint/no-unsafe-member-access": "off",
    "@typescript-eslint/no-unsafe-call": "off",
    "@typescript-eslint/no-unsafe-assignment": "off",
    "@typescript-eslint/member-delimiter-style": [
      "error",
      {
        "multiline": {
          "delimiter": "semi",
          "requireLast": true
        },
        "singleline": {
          "delimiter": "semi",
          "requireLast": false
        }
      }
    ],
    // "cases" allows for graceful use of that variable
    // name in Typescript test cases
    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        "varsIgnorePattern": "cases|^_",
        "argsIgnorePattern": "^_"
      }
    ]
  }
}