rask — Simple stupid rake task runner if you need to call them within another task

rake-dsl-rask.rake

# can be loaded via `import`:

module Rake
  module DSL

    class Rask
      def initialize
        @stack = []
      end

      def method_missing name, *_args
        name == :run! ?
          Rake::Task[@stack.join(":").to_sym].invoke :
            self.tap{ @stack << name }
      end
    end

    def rask
      Rask.new
    end

  end
end

Rakefile

# usable in `Rakefile`:

rask = Class.new do
  def initialize
    @stack = []
  end
  def method_missing name, *_args
    name == :run! ?
      Rake::Task[@stack.join(":").to_sym].invoke :
        self.tap{ @stack << name }
  end
  def self.method_missing name, *_args
    self.new.send name
  end
end

# demo

namespace :a do
  namespace :deeply do
    task :nested do
      puts "I am `a:deeply:nested` task."
    end
  end
end

task :a do
  puts "I am :a!"
end

task :b do
  puts "I am :b and will call some other rake tasks now ..."
  rask.a.run!
  rask.a.deeply.nested.run!
  puts "Back in :b and done."
end