From: Sean O'Halpin <sean.ohalpin@...>
Date: 2008-05-11T04:45:48+09:00
Subject: Re: How to tell if script running under rubyw vs ruby?

On Sat, May 10, 2008 at 6:59 PM, Joe Swatosh <joe.swatosh@gmail.com> wrote:
> I spent some time poking around in Config, but so far this is the the
> only thing I've found that works:
>
> begin
>  puts 'this is a test'
>  # here is ruby
> rescue
>  # here is rubyw
> end
>
> And I really don't love the side effect when using ruby.  Please tell
> me there is a better way.
>
> Thanks,
> --
> Joe Swatosh
>
>
As you've found out, stdout doesn't work under rubyw because all three
usual streams (stdout, stdin and stderr) are closed in a Windows exe.
I don't have a Window box handy to test, but you could try checking
the value of STDOUT under rubyw - it's probably nil or something like
that or you may get .eof? == true. Only a heuristic, but should serve
to distinguish between your two use cases.

Regards,
Sean