Rename file or files in directory with md5 hash file

md5file

#!/usr/bin/env ruby

require 'digest/md5' 

def md5_rename_file(filepath)
  newname = Digest::MD5.file(filepath).hexdigest + File.extname(filepath)  
  puts filepath + ' -> ' + newname
  File.rename(filepath, newname)
end

def md5_rename_directory(directory, recurive = false)
  Dir.glob(directory + '/*').each do | file |
    if File.file?(file) then
      md5_rename_file(file)
    else
      if recurive then md5_rename_directory(file, true) end
    end
  end
end

unless ARGV[0] then abort "usage: #{File.basename(__FILE__)} [-R] [FILE]..." end

if File.file?(ARGV[0])
  md5_rename_file(ARGV[0])
else
  if ARGV[1] === '-R' then recursive = true else recursive = false end
  md5_rename_directory(ARGV[0], recursive)
end