Ungraceful Gnu-ification for Go.

This helps Go commandline apps to behave a bit more 'coreutils'-like, or 'Gnu-ish'.

Yes, there are many other flagset libraries out there. This one provides a wrapper around the existing flag.FlagSet, embedding and embellishing it. You can use uggo as a drop-in replacement for flag.FlagSet, or you can specify a couple of different behaviours. Up to you.

The reason why it's called 'ungraceful' is because it's an approximation of gnu-like behaviour, as close as I could get while still wrapping flag.FlagSet. It's good enough for me anyway. Also, the STDIN-pipe-detection is platform-specific, relying on an undocumented behaviour in Windows.

• 'Gnuify' options such as -lah so they are treated as -l -a -h (whereas --lah is treated as-is, as a single option --lah)
• detect whether STDIN is being piped from another process
• 'aliased flags' (wrapper methods making it easier to define short and long options, or just multiple options)
• Re-jigged format of 'Usage' to incroporate 'aliased flags'

These programs use uggo:

• https://github.com/laher/someutils
• https://github.com/laher/wget-go
• https://github.com/laher/scp-go