convert.rb

#!/usr/bin/env ruby

# Finds all files in app directory that have CRLF line endings
# and converts them to LF line endings by removing all of the CR (\r) characters.
files = %x{find app -exec file {} \\; | grep CRLF}.map{|s| s.gsub(/:.*$/, '').strip}
files.each do |f|
  puts "Processing #{f}"
  system "tr -d '\\r' < #{f} > #{f}.new"
  system "mv #{f}.new #{f}"
end