0

我有一个任务，我正在尝试将其重构为一个外部模块，以便以后可以将其与该项目分开并将其用于其他项目。

当我尝试运行我的任务时，我收到一个错误：

Buildr aborted!
NoMethodError : undefined method `path_to' for nil:NilClass

本质上，似乎project.task从未调用该块的代码。

代码如下。一些代码来自编译任务的工作代码，所以我知道这些位可能是正确的。其他部分来自构建器的记录示例，根据今天早些时候的经验，可以用一粒盐（或有时是整个湖）来获取。不过，我无法弄清楚我做错了什么。

module MacAppBundle
  include Buildr::Extension

  class MacAppBundleTask < Rake::Task
    attr_accessor :app_name

    def initialize(*args)
      super

      enhance do |task|
        #TODO: @project is always nil here because associate_with is never called
        app = @project.path_to("target/#{app_name}.app")
        if File.exists?(app)
          FileUtils.rm_rf(app)
        end
        Dir.mkdir(app)
        #... omitting copying the rest of the stuff into the bundle ...
      end
    end

  protected

    def associate_with(project)
      @project = project
    end
  end

  before_define do |project|
    mac_app_bundle = MacAppBundleTask.define_task('mac_app_bundle')

    project.task 'mac_app_bundle' do |task|
      #TODO: This code never executes. Why?
      mac_app_bundle.send :associate_with, project
      project.local_task('mac_app_bundle')
    end
  end

  after_define do |project|
    #TODO: This bit is definitely questionable because I can't find any documentation
    # or working examples of similar code.
    task('mac_app_bundle' => project.package(:jar))
  end

  def mac_app_bundle
    task('mac_app_bundle')
  end
end

class Buildr::Project
  include MacAppBundle
end

#TODO: Find a place to move this. Seems weird to have to call it in global scope.
Project.local_task('mac_app_bundle') do |name|
  puts "Creating Mac OS X app bundle for #{name}"
end
4

1 回答 1

0

正确的方法似乎是：

  before_define do |project|
    mac_app_bundle = MacAppBundleTask.define_task('mac_app_bundle')
    mac_app_bundle.send :associate_with, project
    project.task('mac_app_bundle')
  end
于 2014-06-14T08:20:01.077 回答