From: Zev Blut <rubyzbibd@...>
Date: 2004-08-30T13:08:52+09:00
Subject: Re: Saving IRB state (Was: Typos)

Hello,

On Sat, 28 Aug 2004 18:55:55 +0900, Lothar Scholz  
<mailinglists@scriptolutions.com> wrote:

> And a huge problem is that copying code fragments into IRB is easy but
> if you want to get some code you typed in IRB multiple lines) getting
> this back to the editor is much more difficult.

If you are not afraid of a bit of text cutting, then it is not that
difficult.

Here is a simple addition to IRB that will save your session to a
file.  Add this to your .irbrc file and when you want to save what you
have done to disk type "IRB.save_session("your_filename")".

# An extension to IRB to save the session to a file
# filename: is the name of the file to save the session in
# hide_IRB: is a command to suppress output of IRB class method calls.
# to prevent execution of the session in Ruby from giving errors.
def IRB.save_session(filename,hide_IRB=true)
   file = File.open(filename,"w")
   file.puts "# Saved IRB session for #{Time.now}",""
   Readline::HISTORY.each do |line|
     next if line =~ /^\s*IRB\./ && hide_IRB
     file.puts line
   end
   file.close
end

Something like this may have been mentioned before, but if not I hope
someone finds it useful.

Best,
Zev