.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint", "check-file"],
  "parserOptions": {
    "ecmaVersion": 6
  },
  "env": {
    "node": true,
    "es6": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "prettier",
    "prettier/@typescript-eslint"
  ],
  "rules": {
    "check-file/folder-naming-convention": [
      "error",
      {
        "src/**/": "KEBAB_CASE",
        "test/lib/**/": "KEBAB_CASE",
        "test/unit/**/": "KEBAB_CASE"
      }
    ],
    "@typescript-eslint/naming-convention": [
      "error",
      { "selector": "default", "format": ["camelCase", "UPPER_CASE"] },
      { "selector": "typeLike", "format": ["PascalCase"] },
      {
        "selector": "typeParameter",
        "format": ["PascalCase"]
      },
      {
        "selector": "interface",
        "format": ["PascalCase"],
        "custom": { "regex": "^I[A-Z]", "match": false }
      }
    ],
    // our typing is a mess
    "@typescript-eslint/explicit-module-boundary-types": "off",
    "@typescript-eslint/explicit-function-return-type": "off",
    "@typescript-eslint/no-explicit-any": "off",
    "@typescript-eslint/ban-types": [
      "error",
      {
        "types": {
          "String": {
            "message": "Use string instead unless you are referring to the constructor",
            "fixWith": "string"
          },
          "Number": {
            "message": "Use number instead unless you are referring to the constructor",
            "fixWith": "number"
          },
          "Boolean": {
            "message": "Use boolean instead unless you are referring to the constructor",
            "fixWith": "boolean"
          }
        },
        "extendDefaults": false
      }
    ],
    "no-prototype-builtins": "off",
    // Conventions have won, sorry linter!
    "@typescript-eslint/no-empty-function": "off",
    // non-null assertions compromise the type safety somewhat, but many
    // our types are still imprecisely defined and we don"t use noImplicitAny
    // anyway, so for the time being assertions are allowed
    "@typescript-eslint/no-non-null-assertion": "off",
    "@typescript-eslint/no-var-requires": "warn",
    "@typescript-eslint/consistent-type-imports": "error",
    // cares about function ordering in a file in a way we don"t care about
    "@typescript-eslint/no-use-before-define": "off",
    "@typescript-eslint/no-unused-vars": "error",
    "no-buffer-constructor": "error",
    "no-import-assign": "error"
  }
}