goopt Documentation
goopt is a flexible and powerful command-line option parser for Go applications. It provides a clear, type-safe approach to building command-line interfaces in Go with support for commands, subcommands, flags, and their relationships.
Choose a Version
Version 1.xx
The v1 is no longer in active development but receives critical bug fixes.
Version 2.xx
The latest version with significant enhancements:
- First-class internationalization (i18n) - Built-in support for English, French, and German with an extensible translation system
- Enhanced error handling - Structured errors with context and improved testing utilities
- Hierarchical flag inheritance - Parent command flags are automatically available to subcommands
- Command-specific flags - Flags can be scoped to specific commands in the hierarchy
- Generics support - Type-safe binding using Go’s generics
- Simplified API - Removal of deprecated methods and more consistent naming
Installation:
go get github.com/napalu/goopt/v2