フォルダ中の@2x画像をすべて縮小して非retina用画像にするスクリプト tiny script for resizing all reitna images in specified directory into non-retina images #USAGE ruby iosimgresize.rb DIR_NAME

iosimgresize.rb

# coding:utf-8

require "rubygems"
require "RMagick"

if !ARGV[0]
  STDERR.puts "missing argument"
  exit
end

if ARGV.length > 1
  STDERR.puts "too many arguments"
  exit
end

Dir.chdir ARGV[0]
Dir.glob("*@2x.(png|jpeg|gif)") { |file|
  img = Magick::ImageList.new file
  w = img.columns
  h = img.rows
  img.resize(w/2,h/2).write(file.gsub("@2x",""))
}