normalize my code files.

detrailer.rb

#!/usr/bin/env ruby

# Detrail.rb (remove all the damn trailing whitespace)
# because god hates people that leave trailing whitespace,
# don't use \n and use \t
#
# Usage:
#   detrail (will assume current directory)
#   detrail path/to/folder or/directory
#

class Detrailer

  def initialize(paths)
    paths  = ["."] if paths.empty?
    @files = []
    paths.each do |path|
      if File.directory? path
        @files += Dir[path + "/**/*"].select { |p| File.file? p }
      else
        @files << path
      end
    end
  end

  def valid_paths?
    @files.inject(true) { |m, e| m && File.exists?(e) }
  end

  def detrail
    @files.each.with_object([]) do |path, obj|
      begin
        contents = File.read(path)
        contents.gsub!(/\r\n?/, "\n") # normalize newline char
        contents.gsub!(/\t/, '  ')    # convert tabs to spaces (2)
        contents.gsub!(/ +$/, '')     # remove trailing spaces
        File.open(path, "w") { |f| f.write contents }
        obj << path
      rescue ArgumentError
        puts "skipping #{path}"
      end
    end
  end

end

detrailed = Detrailer.new($*).detrail
puts "\nRemoved trailing whitespace from:"
puts detrailed