class Xcodeproj::Command::ConfigDump

def extract_common_settings!(build_configurations)
  # Grasp all common build settings
  all_build_settings = build_configurations.map(&:build_settings)
  common_build_settings = all_build_settings.reduce do |settings, config_build_settings|
    settings.select { |key, value| value == config_build_settings[key] }
  end
  # Remove all common build settings from each configuration specific build settings
  build_configurations.each do |config|
    config.build_settings.reject! { |key| !common_build_settings[key].nil? }
  end
  common_build_settings
end