ESLint TypeScript Rule Utilities

eslint-etc provides a collection of utility functions designed primarily to aid in the implementation and testing of custom ESLint rules, particularly those targeting TypeScript codebases. The current stable version is 5.2.1. While there isn't a stated release cadence, updates are typically made as needed for new features, bug fixes, or compatibility with newer ESLint and TypeScript versions. A key differentiator is the `fromFixture` utility, which enables a TSLint-like fixture testing approach for ESLint rules. This simplifies the creation of test cases by allowing developers to directly annotate expected error locations and messages within multiline code strings, abstracting away the need for explicit line and column numbers. This library is largely used by its author for their own suite of ESLint rules, indicating a practical, developer-focused design, though documentation can be light for external users.