.eslintrc.js

/* eslint-disable import/no-commonjs */
/* eslint-disable filenames/match-regex */
/**
 * @type {import('eslint').ESLint.Options}
 */
module.exports = {
  extends: ['eslint-config-ns-ts-base', 'plugin:github/recommended'],
  parserOptions: {
    ecmaVersion: 9,
    sourceType: 'module',
    project: './tsconfig.eslintrc.json'
  },
  rules: {
    /* custom rules */
    'import/extensions': 'off',

    /**
     * based on default rules from https://github.com/actions/typescript-action
     */
    'i18n-text/no-en': 'off',
    'eslint-comments/no-use': 'off',
    'import/no-namespace': 'off',
    'no-unused-vars': 'off',

    '@typescript-eslint/no-unused-vars': 'error',
    '@typescript-eslint/explicit-member-accessibility': [
      'error',
      {accessibility: 'no-public'}
    ],
    '@typescript-eslint/no-require-imports': 'error',
    '@typescript-eslint/array-type': 'error',
    '@typescript-eslint/await-thenable': 'error',
    '@typescript-eslint/ban-ts-comment': 'error',
    camelcase: 'off',
    '@typescript-eslint/consistent-type-assertions': 'error',
    '@typescript-eslint/explicit-function-return-type': [
      'error',
      {allowExpressions: true}
    ],
    '@typescript-eslint/func-call-spacing': ['error', 'never'],
    '@typescript-eslint/no-array-constructor': 'error',
    '@typescript-eslint/no-empty-interface': 'error',
    '@typescript-eslint/no-explicit-any': 'error',
    '@typescript-eslint/no-extraneous-class': 'error',
    '@typescript-eslint/no-for-in-array': 'error',
    '@typescript-eslint/no-inferrable-types': 'error',
    '@typescript-eslint/no-misused-new': 'error',
    '@typescript-eslint/no-namespace': 'error',
    '@typescript-eslint/no-non-null-assertion': 'warn',
    '@typescript-eslint/no-unnecessary-qualifier': 'error',
    '@typescript-eslint/no-unnecessary-type-assertion': 'error',
    '@typescript-eslint/no-useless-constructor': 'error',
    '@typescript-eslint/no-var-requires': 'error',
    '@typescript-eslint/prefer-for-of': 'warn',
    '@typescript-eslint/prefer-function-type': 'warn',
    '@typescript-eslint/prefer-includes': 'error',
    '@typescript-eslint/prefer-string-starts-ends-with': 'error',
    '@typescript-eslint/promise-function-async': 'error',
    '@typescript-eslint/require-array-sort-compare': 'error',
    '@typescript-eslint/restrict-plus-operands': 'error',
    '@typescript-eslint/type-annotation-spacing': 'error',
    '@typescript-eslint/unbound-method': 'error',

    /**
     * @see https://github.com/actions/typescript-action/pull/474
     */
    'filenames/match-regex': [2, '^[a-z_-].+$', true]
  }
}