Things to remember about Rake Tasks

Rakefile

# tasks with arguments
task :taskname, :argument do |t, args|
  message = args[:argument] || 'Hello'
  puts message
end

# Tasks in namespaces
namespace :namespacename do
   task :taskname, :argument do |t, args|
     message = args[:argument] || 'Hello'
     puts message
     Rake::Task["namespacename:taskname1"].invoke(message)
     Rake::Task["namespacename:yeah"].execute
   end

   task :taskname1, :argument do |t, args|
     message = args[:argument] || 'Hello'
     puts message
   end

   tasks :yeah do 
     
   end

end

how to define namespaces
task :mytask do
  # ...
end

namespace :myscope do
  task :mytask => "rake:mytask"
end