an example on how to see which vagrant triggers exist

try-vagrant-triggers-experimental.rb

  # NB before running this you need to export an environment variable: export VAGRANT_EXPERIMENTAL='typed_triggers'
  #    see https://www.vagrantup.com/docs/triggers/configuration.html#trigger-types
  # NB to see all triggers you need to edit your vagrant source code:
  #       sudo vim /opt/vagrant/embedded/gems/2.2.4/gems/vagrant-2.2.4/lib/vagrant/plugin/v2/trigger.rb
  #    and add a @ui.info to see all trigger action stages, et all:
  #       NB see https://github.com/hashicorp/vagrant/blob/v2.2.4/lib/vagrant/plugin/v2/trigger.rb
  #       # Fires all triggers, if any are defined for the action and guest. Returns early
  #       # and logs a warning if the community plugin `vagrant-triggers` is installed
  #       #
  #       # @param [Symbol] action Vagrant command to fire trigger on
  #       # @param [Symbol] stage :before or :after
  #       # @param [String] guest_name The guest that invoked firing the triggers
  #       def fire_triggers(action, stage, guest_name, type)
  #         @ui.info("XXX fire_triggers action=#{action} stage=#{stage} guest_name=#{guest_name} type=#{type}")
  config.trigger.after :'VagrantPlugins::CommandUp::StoreBoxMetadata', type: :action do |trigger|
    trigger.info = 'XXX VagrantPlugins::CommandUp::StoreBoxMetadata'
    trigger.ruby do |env, machine|
      # NB @env     is https://github.com/hashicorp/vagrant/blob/v2.2.4/lib/vagrant/environment.rb
      # NB @machine is https://github.com/hashicorp/vagrant/blob/v2.2.4/lib/vagrant/machine.rb

      # see whether the machine is already provisioned.
      # see https://github.com/hashicorp/vagrant/blob/v2.2.4/lib/vagrant/action/builtin/provision.rb#L41
      # NB to start the first provisioner for this to be true.
      already_provisioned = false
      sentinel_path = machine.data_dir.join("action_provision")
      if sentinel_path.file?
        parts = sentinel_path.read.chomp.split(":", 2)
        if parts[0] == "1.5" && parts[1] == machine.id.to_s
          already_provisioned = true
        end
      end

      puts "XXX machine.name=#{machine.name}"
      puts "XXX machine.id=#{machine.id}"
      puts "XXX machine.state=#{machine.state}"
      puts "XXX already_provisioned? #{already_provisioned}"
      puts "XXX trigger run machine=#{machine.inspect}"
      puts "XXX trigger run machine.provider=#{machine.provider.inspect}"
      puts "XXX machine.config.vm.communicator=#{machine.config.vm.communicator || :ssh}"
      puts "XXX machine communicator=#{machine.communicate}" # for an example see https://github.com/rgl/vagrant-windows-update/blob/v0.0.7/lib/vagrant-windows-update.rb#L53
    end
  end