我有以下示例是基于我想要我的rakefile使用的结构：
- task :default do
- puts 'Tasks you can run: dev,stage,prod'
- end
- task :dev => [:init,:devrun,:clean]
- task :devrun do
- puts 'Dev stuff'
- end
- task :stage => [:init,:stagerun,:clean]
- task :stagerun do
- puts 'Staging stuff'
- end
- task :prod => [:init,:prodrun,:clean]
- task :prodrun do
- puts 'Production stuff'
- end
- task :init do
- puts 'Init...'
- end
- task :clean do
- puts 'Cleanup'
- end
任务总是按照相同的顺序运行吗？我读到某个地方,他们不会,还有别的地方,所以我不知道.
或者,如果您可以建议一个更好的方法来做我正在尝试实现的(例如,有一个常见的初始化和清理步骤围绕依赖环境的步骤),那也是很好的.
谢谢
解决方法
从耙源码：
- # Invoke all the prerequisites of a task.
- def invoke_prerequisites(task_args,invocation_chain) # :nodoc:
- @prerequisites.each { |n|
- prereq = application[n,@scope]
- prereq_args = task_args.new_scope(prereq.arg_names)
- prereq.invoke_with_call_chain(prereq_args,invocation_chain)
- }
- end
所以看起来,代码通常只是迭代数组并顺序运行必备任务.
然而：
- # Declare a task that performs its prerequisites in parallel. Multitasks does
- # *not* guarantee that its prerequisites will execute in any given order
- # (which is obvIoUs when you think about it)
- #
- # Example:
- # multitask :deploy => [:deploy_gem,:deploy_rdoc]
- #
- def multitask(args,&block)
- Rake::MultiTask.define_task(args,&block)
- end
所以你是对的,都可以是真的,但是只有在你的任务前面加上多任务的时候,命令才能被关掉它看起来像是常规的任务按顺序运行.