Rakefile to run Event Manager

Rakefile

task :default => :first

def open_file(filename)
  system "ruby event_manager.rb #{filename}"
end

desc "open the first event attendees"
task :first do
  open_file "event_attendees.csv"
end 

desc "open the second event attendees"
task :second do
  system "ruby event_manager.rb event_attendees2.csv"
end

namespace :nested do
  desc "open the second event attendees, then say done"
  task :verbose => [ :first, :second ] do
    puts "All done"
  end
end