Simple, extremely lightweight, extensible, configuration management library for Go. Supports JSON, TOML, YAML, env, command line, file, S3 etc. Alternative to viper.

go command line option parser

Kong is a command-line parser for Go

Struct-based argument parsing in Go

GNU command line argument parser

Fully featured Go (golang) command line option parser with built-in auto-completion support.

A declarative, simple, fast, and fun package for building command line tools in Go