class Xcodeproj::Project::Object::PBXFileReference

def build_files
  referrers.select { |r| r.class == PBXBuildFile }
end

def display_name
  name || (File.basename(path) if path)
end

def file_reference_proxies
  containers = proxy_containers
  if containers.empty?
    []
  else
    project.objects.select do |object|
      object.isa == 'PBXReferenceProxy' &&
        containers.include?(object.remote_ref)
    end
  end
end

def hierarchy_path
  GroupableHelper.hierarchy_path(self)
end

def move(new_parent)
  GroupableHelper.move(self, new_parent)
end

def parent
  GroupableHelper.parent(self)
end

def parents
  GroupableHelper.parents(self)
end

def project_reference_metadata
  project.root_object.project_references.find do |project_reference|
    project_reference[:project_ref] == self
  end
end

def proxy?
  false
end

def proxy_containers
  project.objects.select do |object|
    object.isa == 'PBXContainerItemProxy' &&
      object.container_portal == uuid
  end
end

def real_path
  GroupableHelper.real_path(self)
end

def remove_from_project
  if project_reference = project_reference_metadata
    file_reference_proxies.each(&:remove_from_project)
    target_dependency_proxies.each(&:remove_from_project)
    project_reference[:product_group].remove_from_project
    project.root_object.project_references.delete(project_reference)
  end
  super
end

def set_explicit_file_type(type = nil)
  self.last_known_file_type = nil
  if type
    self.explicit_file_type = type
  elsif path
    extension = Pathname(path).extname[1..-1]
    self.explicit_file_type = Constants::FILE_TYPES_BY_EXTENSION[extension]
  end
end

def set_last_known_file_type(type = nil)
  if type
    self.last_known_file_type = type
  elsif path
    extension = Pathname(path).extname[1..-1]
    self.last_known_file_type = Constants::FILE_TYPES_BY_EXTENSION[extension]
  end
end

def set_path(path)
  if path
    GroupableHelper.set_path_with_source_tree(self, path, source_tree)
  else
    self.path = nil
  end
end

def set_source_tree(source_tree)
  GroupableHelper.set_source_tree(self, source_tree)
end

def target_dependency_proxies
  containers = proxy_containers
  if containers.empty?
    []
  else
    project.objects.select do |object|
      object.isa == 'PBXTargetDependency' &&
        containers.include?(object.target_proxy)
    end
  end
end