builder/amazon/all: refactor ami tags [GH-233]

Refactor the EBS ami tag into a common step and add support
for instance-store ami tags.
/cc @jmassara

builder/amazon/common/step_create_tags.go

+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/goamz/ec2"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type StepCreateTags struct {
+	Tags map[string]string
+}
+
+func (s *StepCreateTags) Run(state map[string]interface{}) multistep.StepAction {
+	ec2conn := state["ec2"].(*ec2.EC2)
+	ui := state["ui"].(packer.Ui)
+	amis := state["amis"].(map[string]string)
+	ami := amis[ec2conn.Region.Name]
+
+	if len(s.Tags) > 0 {
+		ui.Say(fmt.Sprintf("Adding tags to AMI (%s)...", ami))
+
+		var ec2Tags []ec2.Tag
+		for key, value := range s.Tags {
+			ec2Tags = append(ec2Tags, ec2.Tag{key, value})
+		}
+
+		_, err := ec2conn.CreateTags([]string{ami}, ec2Tags)
+		if err != nil {
+			err := fmt.Errorf("Error adding tags to AMI (%s): %s", ami, err)
+			state["error"] = err
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepCreateTags) Cleanup(state map[string]interface{}) {
+	// No cleanup...
+}

builder/amazon/ebs/builder.go

@@ -30,9 +30,6 @@ type config struct {
 
 	// Tags for the AMI
 	Tags map[string]string
-
-	// Unexported fields that are calculated from others
-	ec2Tags []ec2.Tag
 }
 
 type Builder struct {
@@ -63,15 +60,6 @@ func (b *Builder) Prepare(raws ...interface{}) error {
 		}
 	}
 
-	// Convert Tags to ec2.Tag
-	if b.config.Tags != nil {
-		var ec2Tags []ec2.Tag
-		for key, value := range b.config.Tags {
-			ec2Tags = append(ec2Tags, ec2.Tag{key, value})
-		}
-		b.config.ec2Tags = ec2Tags
-	}
-
 	if errs != nil && len(errs.Errors) > 0 {
 		return errs
 	}
@@ -122,9 +110,8 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		},
 		&common.StepProvision{},
 		&stepStopInstance{},
-		&stepCreateAMI{
-			Tags: b.config.ec2Tags,
-		},
+		&stepCreateAMI{},
+		&awscommon.StepCreateTags{b.config.Tags},
 	}
 
 	// Run!

builder/amazon/ebs/step_create_ami.go

@@ -12,9 +12,7 @@ import (
 	"time"
 )
 
-type stepCreateAMI struct {
-	Tags []ec2.Tag
-}
+type stepCreateAMI struct{}
 
 type amiNameData struct {
 	CreateTime string
@@ -66,18 +64,6 @@ func (s *stepCreateAMI) Run(state map[string]interface{}) multistep.StepAction {
 		return multistep.ActionHalt
 	}
 
-	// Add tags to AMI
-	if s.Tags != nil {
-		ui.Say(fmt.Sprintf("Adding tags to AMI (%s)...", createResp.ImageId))
-		_, err := ec2conn.CreateTags([]string{createResp.ImageId}, s.Tags)
-		if err != nil {
-			err := fmt.Errorf("Error adding tags to AMI (%s): %s", createResp.ImageId, err)
-			state["error"] = err
-			ui.Error(err.Error())
-			return multistep.ActionHalt
-		}
-	}
-
 	return multistep.ActionContinue
 }
 

builder/amazon/instance/builder.go

@@ -33,6 +33,7 @@ type Config struct {
 	BundleUploadCommand string `mapstructure:"bundle_upload_command"`
 	BundleVolCommand    string `mapstructure:"bundle_vol_command"`
 	S3Bucket            string `mapstructure:"s3_bucket"`
+	Tags                map[string]string
 	X509CertPath        string `mapstructure:"x509_cert_path"`
 	X509KeyPath         string `mapstructure:"x509_key_path"`
 	X509UploadPath      string `mapstructure:"x509_upload_path"`
@@ -176,6 +177,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		&StepBundleVolume{},
 		&StepUploadBundle{},
 		&StepRegisterAMI{},
+		&awscommon.StepCreateTags{b.config.Tags},
 	}
 
 	// Run!