From: James Gray <james@...>
Date: 2009-04-20T08:51:27+09:00
Subject: Re: Which ruby is running me?

On Apr 19, 2009, at 6:45 PM, John Carter wrote:

> What is the One True Way of finding the path to _the_ instance of ruby
> that is currently executing this script?

I'm pretty sure this always works:

$ ruby -r rbconfig -e 'p File.join(Config::CONFIG.values_at(*%w[bindir  
ruby_install_name])) + Config::CONFIG["EXEEXT"]'
"/usr/local/bin/ruby"

James Edward Gray II