From: James Edward Gray II <james@...>
Date: 2007-07-27T22:07:33+09:00
Subject: Re: Getting Ruby Path at runtime?

On Jul 27, 2007, at 4:41 AM, Ronald Fischer 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
>
> ?

Sure:

Firefly:~/Desktop$ /usr/local/bin/ruby find_ruby.rb
/usr/local/bin/ruby
Firefly:~/Desktop$ /usr/bin/ruby find_ruby.rb
/usr/bin/ruby
Firefly:~/Desktop$ cat find_ruby.rb
#!/usr/bin/env ruby -wKU

require "rbconfig"

puts File.join(Config::CONFIG["bindir"], Config::CONFIG 
["ruby_install_name"])

__END__

Hope that helps.

James Edward Gray II