From: Sam Morrison <sam@...>
Date: 2007-07-27T22:20:04+09:00
Subject: Re: Getting Ruby Path at runtime?

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On 7/27/07, Ronald Fischer <ronald.fischer@venyon.com> wrote:
>
> Is it possible to find out under Windows, which Ruby has been used to
> run a program?
> Example: A program is invoked by
>
>     C:\inst\ruby186\bin\ruby.exe appl.rb
>
> Is it then possible to find out inside appl.rb the whole path
>
>    C:\inst\ruby186\bin\ruby.exe
>
> ? If not, is it at least possible to find out
>
> - the Ruby version (1.8.6) and
> - whether it is executed by Ruby or JRuby?


You can do a check for the JRUBY_VERSION constant. If it exists then you are
using jruby.

--
sam

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