Combine image assets in different sizes (for iPhone/iPad) into a single directory using cocos2d sufixes

copy_assets.rb

require 'fileutils'
include FileUtils

#
# Copy images from a directory hierarchy like this:
#
#  dir/
#     320x480/
#     640x480/
#     1024x768/
#     2048x1536/
#
#  to a single directory using cocos2d 2.x default sufixes for images ('', -hd, -ipad, -ipadhd).
#

$src_dir = ARGV.shift
$assets_dir = ARGV.shift
if $src_dir.nil? || $assets_dir.nil?
  puts "usage: #{$0} <src_dir> <assets_dir>"
  exit 1
end


def copy_assets(resolution, sufix)
  dir = File.join($src_dir, resolution)
  unless File.directory?(dir)
    $stderr.puts "#{dir} doesn't exists"
    return
  end

  sufix ||= ''

  paths = Dir.glob(File.join(dir, '*'))
  paths.each do |path|
    ext = File.extname(path)
    out_path = File.join($assets_dir, File.basename(path, ext) + sufix + ext)
    cp(path, out_path)
  end
  puts "#{paths.size} files copied from #{resolution}"
end



resolutions = [
  [ '320x480', nil ],
  [ '640x960', '-hd' ],
  [ '1024x768', '-ipad' ],
  [ '2048x1536', '-ipadhd' ],
]

resolutions.each { |res| copy_assets(*res) }