如何在 Rake 中将参数从父任务传递到子任务？

发布于 2024-08-27 14:55:31 字数 532 浏览 6 评论 0原文

我正在编写一个 Rake 脚本，其中包含带有参数的任务。我弄清楚了如何传递参数以及如何使任务依赖于其他任务。

task :parent, [:parent_argument1, :parent_argument2, :parent_argument3] => [:child1, :child2] do
  # Perform Parent Task Functionalities
end

task :child1, [:child1_argument1, :child1_argument2] do |t, args|
  # Perform Child1 Task Functionalities
end

task :child2, [:child2_argument1, :child2_argument2] do |t, args|
  # Perform Child2 Task Functionalities
end

我可以将参数从父任务传递给子任务吗？
有没有办法让子任务成为私有任务，这样它们就不能被独立调用？

原文

I am writing a Rake script which consists of tasks with arguments. I figured out how to pass arguments and how to make a task dependent on other tasks.

task :parent, [:parent_argument1, :parent_argument2, :parent_argument3] => [:child1, :child2] do
  # Perform Parent Task Functionalities
end

task :child1, [:child1_argument1, :child1_argument2] do |t, args|
  # Perform Child1 Task Functionalities
end

task :child2, [:child2_argument1, :child2_argument2] do |t, args|
  # Perform Child2 Task Functionalities
end

Can I pass the arguments from the parent task to the child tasks?
Is there a way to make the child tasks as private so they can't be called independently?

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桃扇骨 2024-09-03 14:55:31

我实际上可以想到三种在 Rake 任务之间传递参数的方法。

使用 Rake 的内置参数支持：

# 接受参数 :one 并依赖于 :second 任务。
任务：第一个，[：一个] => :第二次做 |t, args|
  放置 args.inspect # => '{：一=> “一” }'
结尾

# 参数 :one 是从任务 :first 自动传递的。
任务：第二个，：一个做|t，args|
  放置 args.inspect # => '{：一=> “一” }'
结尾

$先耙[一]

通过 Rake::Task#invoke：

# 接受参数 :one、:two 并将它们传递给 :second 任务。
任务 :first, :one, :two 做 |t, args|
  放置 args.inspect # => '{:一=> “1”，：二=> “2”}'
  任务(:第二个).invoke(args[:one], args[:two])
结尾

# 接受通过 #invoke 传递的参数 :third, :fourth。
# 请注意，参数是按位置而不是名称传递的。
任务：第二，：第三，：第四做|t，args|
  放置 args.inspect # => '{：第三=> “1”，：第四=> “2”}'
结尾

$ 首先耙子[1, 2]

另一个解决方案是猴子补丁 Rake 的主要应用程序对象 Rake::应用程序
并用它来存储任意值：

类 Rake::Application
  attr_accessor：我的数据
结尾

任务：第一个=> ：第二次做
  放置 Rake.application.my_data # => “第二”
结尾

任务：第二个=> ：第三次做
  放置 Rake.application.my_data # => “第三”
  Rake.application.my_data = "第二个"
结尾

任务：第三次做
  Rake.application.my_data = "第三个"
结尾

$先耙

I can actually think of three ways for passing arguments between Rake tasks.

Use Rake’s built-in support for arguments:

# accepts argument :one and depends on the :second task.
task :first, [:one] => :second do |t, args|
  puts args.inspect  # => '{ :one => "one" }'
end

# argument :one was automagically passed from task :first.
task :second, :one do |t, args|
  puts args.inspect  # => '{ :one => "one" }'
end

$ rake first[one]

Directly invoke tasks via Rake::Task#invoke:

# accepts arguments :one, :two and passes them to the :second task.
task :first, :one, :two do |t, args|
  puts args.inspect  # => '{ :one => "1", :two => "2" }'
  task(:second).invoke(args[:one], args[:two])
end

# accepts arguments :third, :fourth which got passed via #invoke.
# notice that arguments are passed by position rather than name.
task :second, :third, :fourth do |t, args|
  puts args.inspect  # => '{ :third => "1", :fourth => "2" }'
end

$ rake first[1, 2]

Another solution would be to monkey patch Rake’s main application object Rake::Application
and use it to store arbitary values:

class Rake::Application
  attr_accessor :my_data
end

task :first => :second do
  puts Rake.application.my_data  # => "second"
end

task :second => :third do
  puts Rake.application.my_data  # => "third"
  Rake.application.my_data = "second"
end

task :third do
  Rake.application.my_data = "third"
end

$ rake first

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蘑菇王子 2024-09-03 14:55:31

设置属性似乎也很有魅力。

只需确保将任务依赖项设置为设置您需要的属性的任务即可。

# set the attribute I want to use in another task
task :buy_puppy, [:name] do |_, args|
  name = args[:name] || 'Rover'
  @dog = Dog.new(name)
end

# task I actually want to run
task :walk_dog => :buy_puppy do
  @dog.walk
end

Setting attributes seems to work like a charm too.

Just ensure the the task dependency is set to the task that sets the attributes you need.

# set the attribute I want to use in another task
task :buy_puppy, [:name] do |_, args|
  name = args[:name] || 'Rover'
  @dog = Dog.new(name)
end

# task I actually want to run
task :walk_dog => :buy_puppy do
  @dog.walk
end

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