From: Stefano Crocco <stefano.crocco@...>
Date: 2007-07-17T00:47:58+09:00
Subject: Re: How can I get the Ruby version from within a Ruby script?

Alle luned� 16 luglio 2007, Paul ha scritto:
> I want to log the current Ruby version to a log file along with the
> script version, but I don't know how to get the Ruby version from
> within a running script.
>
> I tried:
>    puts system("ruby -v")
>
> but that only returns "true" from within a script.  (I see the correct
> output when I run it in IRB, but the script doesn't capture that.)
>
> I also tried :
>    puts Config::CONFIG["ruby_version"]
>
> but that returns "1.8" and I would like "1.8.x".
>
> Any suggestions?  Please let me know.  Thanks.

You can try

  puts(RUBY_VERSION)

By the way, if you need to get the output of an external command, you need to 
use `cmd`, instead of system("cmd").

Stefano