From: "Stephan Kämper" <Stephan.Kaemper@...>
Date: 2004-09-26T01:45:08+09:00
Subject: Re: Directory search

STEPHEN BECKER I V wrote:

> I am writing a program to go in all the folders, then in to there folders.... 
> 

You might like to read
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/20172

and the answers to that one. What's done there is to add a walker method 
to class DIR - which as the name implies walks through the directory and 
uses a passed block to do something with the current path name.

I currently have code like this

class Dir
   def walk ( prefix = nil, &walker )
     e = self.entries
     e.delete "."
     e.delete ".."

     e.collect!{ | x | File.join( prefix, x ) } if prefix

     if block_given?
       e.each { | x |
         if File.directory?( x )
           Dir.new( x ).walk( x, &walker )
         end
         yield x
       }
     end
     nil
   end
end

Dir.new( "E:/" ).walk( "E:/" ) { | p | puts p if p =~ /ruby/ }

But note that this code won't work on XP if there are any directories of 
files which can only be read with administrator rights: You'll run into 
a 'permission denied (Errno::EACCES)'...
I'll have to work on that.


Happy rubying

Stephan