class Xcodeproj::Helper::TargetDiff

def initialize(project, target1_name, target2_name)
  @project = project
  unless @target1 = @project.targets.find { |target| target.name == target1_name }
    raise ArgumentError, "Target 1 by name `#{target1_name}' not found in the project."
  end
  unless @target2 = @project.targets.find { |target| target.name == target2_name }
    raise ArgumentError, "Target 1 by name `#{target2_name}' not found in the project."
  end
end