check.rb

require 'optparse'
require 'pp'

def check(pbxproj, verbose)
  plist = NSPropertyListSerialization.propertyListFromData(
    NSData.dataWithContentsOfFile(pbxproj),
      mutabilityOption:0, format:nil, errorDescription:nil)
  objects = plist["objects"]
  buildSettings = Hash.new
  configs = Hash.new
  objects.values.each do |obj|
    key = obj["buildConfigurationList"]
    if key
      productName = obj["productName"] || ""
      buildSettings[productName] = Hash.new
      list = objects[key]
      list["buildConfigurations"].each do |ckey|
        config = objects[ckey]
        targetName = config["name"]
        settings = config["buildSettings"]
        buildSettings[productName][targetName] = settings
        settings.keys.each do |key|
          configs[key] ||= Hash.new
          configs[key][targetName] ||= Hash.new
          configs[key][targetName][productName] = settings[key]
        end
      end
    end
  end

  configs.keys.sort.each do |key|
    print_line = false
    line = "====================\n"
    line += key + "\n"
    targetSettings = configs[key]
    targetSettings.keys.each do |targetName|
      productSettings = targetSettings[targetName]
      if verbose or productSettings.size > 1
        line += "  " + targetName + "\n"
        line += productSettings.pretty_inspect.gsub(/^(.*)/, '    \1')
        print_line = true
      end
    end
    print line if print_line
  end
end

@verbose = false
OptionParser.new do |opt|
  opt.on('-v') {@verbose = true}
  opt.parse!(ARGV)
end
check(ARGV[0], @verbose)