builder/amazon/instance: prefix has CreateTime support

builder/amazon/instance/builder.go

@@ -53,7 +53,7 @@ func (b *Builder) Prepare(raws ...interface{}) error {
 	}
 
 	if b.config.BundlePrefix == "" {
-		b.config.BundlePrefix = "image"
+		b.config.BundlePrefix = "image-{{.CreateTime}}"
 	}
 
 	if b.config.BundleUploadCommand == "" {

builder/amazon/instance/builder_test.go

@@ -86,7 +86,7 @@ func TestBuilderPrepare_BundlePrefix(t *testing.T) {
 		t.Fatalf("err: %s", err)
 	}
 
-	if b.config.BundlePrefix != "image" {
+	if b.config.BundlePrefix != "image-{{.CreateTime}}" {
 		t.Fatalf("bad: %s", b.config.BundlePrefix)
 	}
 }

builder/amazon/instance/step_bundle_volume.go

@@ -6,7 +6,9 @@ import (
 	"github.com/mitchellh/goamz/ec2"
 	"github.com/mitchellh/multistep"
 	"github.com/mitchellh/packer/packer"
+	"strconv"
 	"text/template"
+	"time"
 )
 
 type bundleCmdData struct {
@@ -19,6 +21,10 @@ type bundleCmdData struct {
 	PrivatePath  string
 }
 
+type bundlePrefixData struct {
+	CreateTime string
+}
+
 type StepBundleVolume struct{}
 
 func (s *StepBundleVolume) Run(state map[string]interface{}) multistep.StepAction {
@@ -49,6 +55,13 @@ func (s *StepBundleVolume) Run(state map[string]interface{}) multistep.StepActio
 	}
 
 	// Bundle the volume
+	var bundlePrefix bytes.Buffer
+	prefixTData := bundlePrefixData{
+		CreateTime: strconv.FormatInt(time.Now().UTC().Unix(), 10),
+	}
+	t := template.Must(template.New("bundlePrefix").Parse(config.BundlePrefix))
+	t.Execute(&bundlePrefix, prefixTData)
+
 	var bundleCmd bytes.Buffer
 	tData := bundleCmdData{
 		AccountId:    config.AccountId,
@@ -56,10 +69,10 @@ func (s *StepBundleVolume) Run(state map[string]interface{}) multistep.StepActio
 		CertPath:     x509RemoteCertPath,
 		Destination:  config.BundleDestination,
 		KeyPath:      x509RemoteKeyPath,
-		Prefix:       config.BundlePrefix,
+		Prefix:       bundlePrefix.String(),
 		PrivatePath:  config.X509UploadPath,
 	}
-	t := template.Must(template.New("bundleCmd").Parse(config.BundleVolCommand))
+	t = template.Must(template.New("bundleCmd").Parse(config.BundleVolCommand))
 	t.Execute(&bundleCmd, tData)
 
 	ui.Say("Bundling the volume...")
@@ -79,6 +92,10 @@ func (s *StepBundleVolume) Run(state map[string]interface{}) multistep.StepActio
 		return multistep.ActionHalt
 	}
 
+	// Store the manifest path
+	state["manifest_path"] = fmt.Sprintf(
+		"%s/%s.manifest.xml", config.BundleDestination, bundlePrefix.String())
+
 	return multistep.ActionContinue
 }
 

builder/amazon/instance/step_upload_bundle.go

@@ -21,6 +21,7 @@ type StepUploadBundle struct{}
 func (s *StepUploadBundle) Run(state map[string]interface{}) multistep.StepAction {
 	comm := state["communicator"].(packer.Communicator)
 	config := state["config"].(*Config)
+	manifestPath := state["manifest_path"].(string)
 	ui := state["ui"].(packer.Ui)
 
 	var uploadCmd bytes.Buffer
@@ -28,8 +29,7 @@ func (s *StepUploadBundle) Run(state map[string]interface{}) multistep.StepActio
 		AccessKey:       config.AccessKey,
 		BucketName:      config.S3Bucket,
 		BundleDirectory: config.BundleDestination,
-		ManifestPath: fmt.Sprintf(
-			"%s/%s.manifest.xml", config.BundleDestination, config.BundlePrefix),
+		ManifestPath:    manifestPath,
 		SecretKey:       config.SecretKey,
 	}
 	t := template.Must(template.New("uploadCmd").Parse(config.BundleUploadCommand))