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def run_task_on_single_host Capistrano::Configuration::Roles.class_eval do yield end end if ENV['server'] run_task_on_single_host do alias old_role role def role(which, *args) options = args.last.is_a?(Hash) ? args.pop : {} which = which.to_sym args.each do |host| next unless ENV['server'] == host roles[which] << ServerDefinition.new(host, options) end end end end

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