upload dSYM to bugsnag after archive:distribution task in your rubymotion project

gistfile1.rb

task "upload_dsym" do
  dsym_path = App.config.app_bundle_dsym(App.config.deploy_platform)
  app_name = App.config_without_setup.name
  `curl https://upload.bugsnag.com/ -F dsym=@"#{dsym_path}/Contents/Resources/DWARF/#{app_name}"`
end

namespace :archive do
  task :distribution do
    Rake::Task['upload_dsym'].invoke
  end
end