Allow to disable --compact

[pepeiborra]

--compact is pretty good but it doesn't work in non terminals, such as CI. It's also not possible to set it programmatically.

We could use a way to disable it from command line (e.g. --no-compact), or additional smarts that self-disable it when not in a terminal device (or when the terminal device is DUMB).

[pepeiborra]

I'm happy to implement this if you let me know what is your preferred option

[ndmitchell]

Since --compact has to be added explicitly isn't it easier to just not set it on CI?

I still don't have a good idea of what the API should be for compact. It's a bit cross cutting - it prods a few fields in ShakeOptions to do its job. Making it not turn on when the terminal device is dumb is one way - you could have --compact=auto to mean only turn on if terminal is not dumb?

Not that Compact already has an idea if it's going to work or not, see https://github.com/ndmitchell/shake/blob/master/src/Development/Shake/Internal/CompactUI.hs#L64