flag libraries

https://github.com/spf13/pflag

Drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags.

https://github.com/peterbourgon/ff

Flags-first package for configuration

https://github.com/akamensky/argparse

Let's be honest -- Go's standard command line arguments parser flag terribly sucks. It cannot come anywhere close to the Python's argparse module. This is why this project exists.