Help page formatting about optparse-applicative HOT 2 CLOSED

Oh yea, it could also detect if the output device is a terminal to control the default help format. That way if you pipe --help to a file you don't get lots of ANSI escapes in it.

http://hackage.haskell.org/packages/archive/base/4.5.1.0/doc/html/System-IO.html#v:hIsTerminalDevice

To get the width of the terminal I use the terminfo package and code like this:

#if WINDOWS
    let width = Nothing
#else
    width <- fmap (`getCapability` termColumns) setupTermFromEnv
#endif
    let prettyPrint = displayIO stdout . renderPretty 1.0 (fromMaybe 80 width)
                                       . (<> linebreak)

But I'm not sure if this is optimal. It might be possible to get the width on Windows, and it might be that the terminfo package requires certain C header files (although its cabal file mentions none)...

from optparse-applicative.

Branch formatting was merged in 73a25ac. Closing.

from optparse-applicative.