Chances are that if you’re writing Go code for a while now, your needs for command line arguments have grown beyond just what the standard library flag package is able to provide.

A quick list

To quickly list a few packages:

namsral/flag - add environment variable parsing, spf13/pflag - use posix/gnu-style --flags, urfave/cli - adds a default action and command actions, env aliases,… spf13/cobra - an interface for cli commands like git and go tools, spf13/viper - a larger...