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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

Added

  • Panic recovery in user callback functions to prevent crashes from user code errors.

Fixed

  • Parser now catches panics in user callback functions (func(string) and func()) and returns them as errors instead of crashing the program (fixes #8).

v1.1.0 - 2025-10-09

Changed

  • Help() now writes to an io.Writer (defaults to os.Stdout) instead of hardcoding standard output.
  • Parse() and ParseFrom() now return ErrHelp instead of calling os.Exit(0) when --help is requested.
  • Reworked internal formatting to avoid potential panics with small Start or Stop values.

Fixed

  • Restored support for short negations like -no-c.
  • Corrected regular expressions for option detection (--long, -x).
  • Added bounds checks in splitOn() to prevent index out of range errors.
  • Improved handling of stringslice and stringmap assignments (no empty entries).
  • Improved word wrapping and help text formatting for better alignment and safety.
  • Prevented duplicate registration of short or long options.
  • Maintained backward compatibility with all existing APIs.

Developer Experience

  • Added internal error ErrHelp for easier integration in CLI tools and libraries.
  • The parser can now be tested without console output by setting OptionParser.Out.