From: Gabriel Horner <gabriel.horner@...>
Date: 2010-06-18T16:06:38+09:00
Subject: Re: Setting IRB Configurations using env variables?

> Suppose I need to have IRB configurations before I invoke IRB like :
> 
> IRB.conf[:IGNORE_EOF]=true
> IRB.conf[:VERBOSE]=false
> 
> This can be set in config files such as ~/.irbrc etc.. and saved before 
> irb
> is invoked.
> 
> But are there *environment variables I can set in shell to set those
> configurations directly* before I invoke IRB..?

You can't set those configurations with ENV variables. To verify 
yourself, here's the file were irb intializes all of its configurations: 
http://github.com/ruby/ruby/blob/trunk/lib/irb/init.rb. You'll notice 
some configurations can be manipulated with commandline options to irb. 
Otherwise you have to use .irbrc.

Gabriel
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