Rake默认任务和命名空间 [英] Rake Default Task and Namespaces
问题描述
我已经阅读了文档并查看了很多示例,但是我不清楚默认值和名称空间. (使用rake,版本10.0.3)
I have read through the docs and looked at quite a few examples but I am not clear on defaults and namespaces. (using rake, version 10.0.3)
首先,尽管我不记得明确看到过这一点,但无论定义了多少个默认任务,都只能有一个默认任务.显然,加载顺序(PROJECT_NAME :: Application.load_tasks)确定了获胜者.当我努力创建命名空间的默认值时,我发现有时会覆盖Rails应用程序的常规默认值,其中:
First it seems, though I do not recall seeing this explicitly, that there can be only ONE default task regardless of how many are defined. Apparently the load order (PROJECT_NAME::Application.load_tasks) determines the winner. When I have struggled to create a namespaced default I have found that I have sometimes overridden the normal default for a rails app where:
rake
默认运行测试.
首先是"rake -T"命令:
First here is the "rake -T" command:
$ rake -T a_name
rake a_name:a_task_1 # a_task_1
rake a_name:a_task_2 # a_task_2
rake a_name:b_name:b_task_1 # b_task_1
rake a_name:b_name:b_task_2 # b_task_2
rake a_name:default # This is hopefully a namespaced default
当我运行命名空间时,我只希望得到默认"名称:
When I run the namespace only which I am hoping is the "default" I get:
$ rake a_name
rake aborted!
Don't know how to build task 'a_name'
(See full trace by running task with --trace)
我希望它能在b_name命名空间中运行b_task_1,因为我已将其声明为默认值
I was expecting this to run the b_task_1 in the b_name namespace because I have declared it as the default
但是,如果我明确地使用默认"一词,我会得到:
However, If I explicitly tack on the word "default" I get this:
$ rake a_name:default
a_task_1
无论如何我还是很困惑.谁能帮我澄清一下...
Anyway I am thoroughly confused. Can anyone help clarify this for me...
namespace :a_name do
desc "a_task_1"
task :a_task_1 do
puts "a_task_1"
end
desc "a_task_2"
task :a_task_2 do
puts "a_task_2"
end
namespace :b_name do
desc "b_task_1"
task :b_task_1 do
puts "b_task_1"
end
desc "b_task_2"
task :b_task_2 do
puts "b_task_2"
end
end
desc "This is hopefully a namespaced default"
task :default => 'b_name:b_task_1'
end
推荐答案
您可以定义一个与名称空间同名的任务.我认为它没有在名称空间内部定义默认任务那样漂亮.
You can define a task with the same name as your namespace. It is not as pretty as having the default task defined inside the namespace itself I think.
desc "runs bar & baz in foo"
task foo: ["foo:bar", "foo:baz"]
namespace :foo do
desc "bar in foo"
task :bar do
puts "bar"
end
desc "baz in foo"
task :baz do
puts "baz"
end
end
这就是他们被列出的方式:
And that's how they get listed:
rake foo # runs bar & baz in foo
rake foo:bar # bar in foo
rake foo:baz # baz in foo
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