画像ファイルの情報取得（Ruby を使用）

#! ruby -Ks
# coding: windows-31j

# usage: ruby imagefileinfo.rb filelist.rb > LIST.txt

# This program 
# generate a image file list including its image file attributes

# generate image file list
#   input : a YAML file that discribe pattern(s) of file names
#           [example of "filelist.rb"]
#           $a = <<-EOS
#           - path: /home/www/teaimage/20100524syouhin
#             pattern: *.JPG
#           - path: /home/www/teaimage/20100524syouhin_data
#             pattern: *.JPG
#           EOS
#   output : image file list with image information

require 'rubygems'
require 'progressbar'
require 'yaml'
require 'digest/sha2'

load ARGV[0] 

b = YAML.load( $a )

for i in b
  # from a pattern to a file list
  files = Dir.glob( i["path"] + "/" + i["pattern"] )
  progress_bar = ProgressBar.new( i["path"], files.length )

  for j in files
    if j[0] = "/" then
      path = j
    else
      path = Dir.pwd + "/" + j
    end
    basename = File.basename( j )
    mtime = File.mtime( j ).strftime('%Y-%m-%d %H:%M:%S')
    digest = Digest::SHA512.hexdigest( File.open( path, "rb" ).read )

    # print out image file information
    printf( "%s %s '%s' %s ", path, basename, mtime, digest )
    system( "identify", "-format", "%C %r %z %k %w %h '%x' '%y'", path.gsub("(","\(").gsub(")","\)") )

    progress_bar.inc
  end
  progress_bar.finish
end