From: Colin Bartlett <colinb2r@...>
Date: 2010-01-08T14:53:44+09:00
Subject: Re: Setting recursion depth

About two months ago I adapted Find for my own purposes,
to automatically include the depth, and to have a "next" method
to make it easier to have two Finds working together.
(For comparing two directory structures, etc.)

I've put the code here, if you're interested:
  http://pastie.org/771204

What I'm still undecided on is the appropriate depth for a file!
For example:

root_file => depth == 0
root_dir => depth == 0
  file => depth == 1 or 0 ? (I'm using 1 for now)
  dir => depth == 1
    file => depth == 2 or 1 ? (I'm using 1 for now)

The code I'm using for the depth is:

 (1) at a root, setting the root depth as 0:
      @depth = 0
      @depth_adjuster = -( @root.count( "/" ) + @root.count( "\\" ) )
      if @root =~ /(?:(:|((\A|:)[\/\\]+))\z)/ then
        @depth_adjuster += 1
        @root_rem_sep = 0  #  xx:  /  xx:/  etc
      elsif k = ( @root =~ /(?:[\/\\]+\z)/ ) then
        @depth_adjuster += 1
        @root_rem_sep = k - @root.length   #  xx/  yy/xx/  etc
      else
        @root_rem_sep = 0  #  xx  yy/xx
      end

 (2) at a dir or file which is not a root:
      @depth = pathv.count( "/" ) + pathv.count( "\\" ) + @depth_adjuster