mytask.rb

set :stages, %w(staging prod)
set :default_stage, "staging"
require 'capistrano/ext/multistage'

namespace :demo_task do
	desc <<-DESC
		Demo task
	DESC
	task :task, :roles => :app do
                capifony_pretty_print "--> Demo task #{foo_var}"
                // If I run the task for the environment where foo_var is defined the value of foo_var is printed correctly
                / otherwise I get an error message telling me that foo_var is nil (but this is not the problem)
		
                // Do something for all environment 

                if defined?(foo_var)
                 // Do something only if foo_var is defined for the the environment
                 // This code is never executed
                end
                    
	end
end