builder/googlecompute: Store empty public_key

builder/googlecompute/step_create_instance.go

@@ -69,13 +69,9 @@ func getImage(c *Config, d Driver) (*Image, error) {
 func (s *StepCreateInstance) Run(state multistep.StateBag) multistep.StepAction {
 	c := state.Get("config").(*Config)
 	d := state.Get("driver").(Driver)
+	sshPublicKey := state.Get("ssh_public_key").(string)
 	ui := state.Get("ui").(packer.Ui)
 
-	sshPublicKey := ""
-	if sshPublicKeyRaw, ok := state.GetOk("ssh_public_key"); ok {
-		sshPublicKey = sshPublicKeyRaw.(string)
-	}
-
 	sourceImage, err := getImage(c, d)
 	if err != nil {
 		err := fmt.Errorf("Error getting source image for instance creation: %s", err)

builder/googlecompute/step_create_ssh_key.go

@@ -37,6 +37,7 @@ func (s *StepCreateSSHKey) Run(state multistep.StateBag) multistep.StepAction {
 		}
 
 		state.Put("ssh_private_key", string(privateKeyBytes))
+		state.Put("ssh_public_key", "")
 
 		return multistep.ActionContinue
 	}