Is it possible to make an interactive Rake task?

Here's an example without using another task.

task :solve_earth_problems => :environment do    
  STDOUT.puts "This is risky. Are you sure? (y/n)"

  begin
    input = STDIN.gets.strip.downcase
  end until %w(y n).include?(input)

  if input != 'y'
    STDOUT.puts "So sorry for the confusion"
    return
  end

  # user accepted, carry on
  Humanity.wipe_out!
end

Something like this might work

task :action do
  STDOUT.puts "I'm acting!"
end

task :check do
  STDOUT.puts "Are you sure? (y/n)"
  input = STDIN.gets.strip
  if input == 'y'
    Rake::Task["action"].reenable
    Rake::Task["action"].invoke
  else
    STDOUT.puts "So sorry for the confusion"
  end
end

Task reenabling and invoking from How to run Rake tasks from within Rake tasks?