To clean up duplicated files. For Mac OS X.

cleanUpDuplicatedFiles.rb

# For Mac OS X
# To clean up duplicated files.

# isDuplicate(fileName)
# It returns true is the files are duplicated.
# It tests:
# - a file name (before the extention) ends with [0-9], and
# - there is a same sized file without trailing [0-9] of its file name.
# For example: "Word Power Made Easy Norman Lewis 528p_067174190X 2.pdf"
#    original: "Word Power Made Easy Norman Lewis 528p_067174190X.pdf"

require 'fileutils'

def isDuplicate(fileName)
  return false unless fileName =~ /^(.*) [0-9](\.\w+)$/
  #return false unless fileName =~ /^(.*).[0-9](\.\w+)$/
  baseName = Regexp.last_match[1]
  baseName = Regexp.last_match[1]
  extention = Regexp.last_match[2]
  originalFileName = baseName + extention
  return false unless File.exists?(originalFileName)
  return false unless File.size(originalFileName) == File.size(fileName)
  if FileUtils.compare_file(originalFileName, fileName)
    return true
  else
    return false
  end
end

def findDuplicateFiles(directoryName)
  foundFileNames = []
  Dir.glob(directoryName + "/*") do |fileName|
    if isDuplicate(fileName)
      foundFileNames << fileName
    end
  end
  return foundFileNames
end

def cleanUp(foundFileNames)
  print "Deleting #{foundFileNames.size} files:\n"
  foundFileNames.each do |fileName|
    File.unlink fileName
    print fileName, "\n"
  end
  print "Finished to delete #{foundFileNames.size} files.\n"
end

# main:

directoryName = ARGV.shift || '.'
foundFileNames = findDuplicateFiles(directoryName)
cleanUp(foundFileNames)