builder/amazon/instance: check for the ami tools

builder/amazon/instance/step_bundle_volume.go

@@ -1,14 +1,36 @@
 package instance
 
 import (
+	"fmt"
 	"github.com/mitchellh/multistep"
-	"time"
+	"github.com/mitchellh/packer/packer"
 )
 
 type StepBundleVolume struct{}
 
 func (s *StepBundleVolume) Run(state map[string]interface{}) multistep.StepAction {
-	time.Sleep(10 * time.Hour)
+	comm := state["communicator"].(packer.Communicator)
+	ui := state["ui"].(packer.Ui)
+
+	// Verify the AMI tools are available
+	ui.Say("Checking for EC2 AMI tools...")
+	cmd := &packer.RemoteCmd{Command: "ec2-ami-tools-version"}
+	if err := comm.Start(cmd); err != nil {
+		state["error"] = fmt.Errorf("Error checking for AMI tools: %s", err)
+		ui.Error(state["error"].(error).Error())
+		return multistep.ActionHalt
+	}
+	cmd.Wait()
+
+	if cmd.ExitStatus != 0 {
+		state["error"] = fmt.Errorf(
+			"The EC2 AMI tools could not be detected. These must be manually\n" +
+				"via a provisioner or some other means and are required for Packer\n" +
+				"to create an instance-store AMI.")
+		ui.Error(state["error"].(error).Error())
+		return multistep.ActionHalt
+	}
+
 	return multistep.ActionContinue
 }