How to run Rake tasks from within Rake tasks?

 

I have a Rakefile that compiles the project in two ways, according to the global variable $build_type , which can be :debug or :release (the results go in separate directories): 

task :build => [:some_other_tasks] do
end

I wish to create a task that compiles the project with both configurations in turn, something like this: 

task :build_all do
  [ :debug, :release ].each do |t|
    $build_type = t
    # call task :build with all the tasks it depends on (?)
  end
end

Is there a way to call a task as if it were a method? Or how can I achieve anything similar?

If you need the task to behave as a method, how about using an actual method? 

task :build => [:some_other_tasks] do
  build
end

task :build_all do
  [:debug, :release].each { |t| build t }
end

def build(type = :debug)
  # ...
end

If you'd rather stick to rake 's idioms, here are your possibilities, compiled from past answers:

  • This always executes the task, but it doesn't execute its dependencies: 

    Rake::Task["build"].execute

  • This one executes the dependencies, but it only executes the task if it has not already been invoked: 

    Rake::Task["build"].invoke

  • This first resets the task's already_invoked state, allowing the task to then be executed again, dependencies and all: 

    Rake::Task["build"].reenable
Rake::Task["build"].invoke

    (Notice that dependencies already invoked are not re-executed)

    • 例如： 

    Rake::Task["db:migrate"].invoke

    task :build_all do
  [ :debug, :release ].each do |t|
    $build_type = t
    Rake::Task["build"].reenable
    Rake::Task["build"].invoke
  end
end

    这应该把你排除在外，我自己也需要同样的东西。

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