# Both of these are modified from the implementations
# in fileutils.rb from Ruby 1.9.1p378

# Note that if the filter rejects a subdirectory then everything within that
# subdirectory is automatically skipped as well.

# Like FileUtils.cp_r, but takes a filter proc that can return false to skip a file
def cp_rx src, dest, options = {}, &filter
	fu_check_options options, OPT_TABLE['cp_r']
	fu_output_message "cp -r#{options[:preserve] ? 'p' : ''}#{options[:remove_destination] ? ' --remove-destination' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
	return if options[:noop]
	fu_each_src_dest(src, dest) do |s, d|
		copy_entryx s, d, filter, options[:preserve], options[:dereference_root], options[:remove_destination]
	end
end

# Like FileUtils.copy_entry, but takes a filter proc that can return false to skip a file
def copy_entryx(src, dest, filter, preserve = false, dereference_root = false, remove_destination = false)
	Entry_.new(src, nil, dereference_root).traverse do |ent|
		if filter.call(ent.path) then
			destent = Entry_.new(dest, ent.rel, false)
			File.unlink destent.path if remove_destination && File.file?(destent.path)
			ent.copy destent.path
			ent.copy_metadata destent.path if preserve
		end
	end
end

# Sample usage:
cp_rx "bigDirectoryTree", "dest", {:noop => true} do |name|
	/dontCopyThis$/.match(name)
end