files_from_one_should_be_in_other.rb

if ARGV.length != 2
  puts "syntax: dir_that_has_files_that_should_be_duplicated dir_that_should_have_those_files"
  exit 1
end

def all_files_in_dir dir
  all_in = {}
  Dir[File.expand_path(dir) + "/**/*"].each{|f| # need expand path or in windows Dir["a\b/*"] failz <sigh>
    if File.file? f
      filename = File.basename(f)
      file_size = File.size(f)
      key = "#{filename}_#{file_size}" # XX md5?
      all_in[key] ||= [] # accomodate duplicates
      all_in[key] << File.expand_path(f)
    end
  }
  all_in
end

files_wanted = all_files_in_dir(ARGV[0])

files_there = all_files_in_dir(ARGV[1])

p "searching for #{files_wanted.length} files among #{files_there.length}..."


desired_but_not_found = files_wanted.keys - files_there.keys

for bad in desired_but_not_found
  puts "unable to find #{bad} #{files_wanted[bad]} anywhere"
end