Args for custom Rake tasks

rakefile.rb

task :default => [ :puts ]

def says(*args, &block)
  copy = block
  
  body = proc { 
    copy.call
    puts args.message 
  }
  
  Rake::Task.define_task *args, &body
end

task :puts, [ :message ] do |t, args|
  args.with_defaults :message => 'Hello, rake!'
  puts args.message
end

says :says, [ :message ] do |t, args|
  args.with_defaults :message => 'Hello, rake!'
end

http://stackoverflow.com/questions/15205428