一括リネーム

rename.rb

require 'fileutils'
require 'date'

if ARGV.size < 2
  STDERR.print "Usage: ruby #{$0} <path> <name>\n"
  exit(1)
end

PATH = ARGV[0].gsub(File::ALT_SEPARATOR) {File::SEPARATOR}
NAME = ARGV[1]

DATETIME = DateTime.now.strftime("%Y%m%d%H%M%S")

files = Dir.glob(PATH + "/*")
files.sort! do |a, b|
 File.stat(a).ctime.strftime("%Y%m%d%H%M%S") <=> File.stat(b).ctime.strftime("%Y%m%d%H%M%S")
end

files.each.with_index(1) do |filename, index|
  dirname = File.dirname(filename)
  basename = File.basename(filename)
  extname = File.extname(filename)

  newfilename = dirname + '/' + NAME + '_' + format("%04d", index.to_s) + '_' + DATETIME + extname
  if !File.exists?(newfilename)
    File.rename(filename, newfilename)
    print "[" + index.to_s + "]" + basename + "->" + NAME + '_' + format("%04d", index.to_s) + '_' + DATETIME + extname + "\n"
  else
    raise "Exist new file name.\n"
  end
end

print "Finish!\n"