From: "David A. Black" <dblack@...>
Date: 2005-05-12T20:25:35+09:00
Subject: Re: Go through directories recursively

HI --

On Thu, 12 May 2005, Jens Riedel wrote:

> Hello,
>
> I'm quite new to Ruby.
> I'd to walk through a directory tree and edit all jsp files in there.
>
> I do it this way:
>
> def editDirectory(path)
>    Dir.entries(path).each { |filename|
>      next if filename =~ /^\.+$/
>      currFile = path + "/" + filename
>      if(File.stat(currFile).directory?)
>        editDirectory(currFile)
>      elsif(filename =~ /(.+)\.jsp$/)
>        # ... do something with the file
>      end
>    }
> end
>
> I'd like to know if there is a more professional or more "ruby-like" way to 
> do this...

You can use the 'find' module.  Here's a parameterized version, which
takes as its arguments a path and a file extension, and yields back
the filenames it finds one by one:

   require 'find'

   def find_by_extension(path, ext)
     Find.find(path) do |f|
       next unless FileTest.file?(f)
       next unless /#{Regexp.escape(ext)}$/.match(f)
       yield f
     end
   end

   # Example of usage:

   find_by_extension("/home/dblack", ".rb") do |f|
     # do stuff with f
   end


David

-- 
David A. Black
dblack@wobblini.net