convert alicloud s.IOOptimized into trilean in code

builder/alicloud/ecs/run_config.go

@@ -15,7 +15,7 @@ import (
 type RunConfig struct {
 	AssociatePublicIpAddress bool           `mapstructure:"associate_public_ip_address"`
 	ZoneId                   string         `mapstructure:"zone_id"`
-	RawIOOptimized           config.Trilean `mapstructure:"io_optimized"`
+	IOOptimized              config.Trilean `mapstructure:"io_optimized"`
 	InstanceType             string         `mapstructure:"instance_type"`
 	Description              string         `mapstructure:"description"`
 	AlicloudSourceImage      string         `mapstructure:"source_image"`
@@ -38,7 +38,6 @@ type RunConfig struct {
 	// Communicator settings
 	Comm         communicator.Config `mapstructure:",squash"`
 	SSHPrivateIp bool                `mapstructure:"ssh_private_ip"`
-	IOOptimized  *bool
 }
 
 func (c *RunConfig) Prepare(ctx *interpolate.Context) []error {
@@ -70,7 +69,5 @@ func (c *RunConfig) Prepare(ctx *interpolate.Context) []error {
 		}
 	}
 
-	c.IOOptimized = c.RawIOOptimized.ToBoolPointer()
-
 	return errs
 }

builder/alicloud/ecs/step_create_instance.go

@@ -18,7 +18,7 @@ import (
 )
 
 type stepCreateAlicloudInstance struct {
-	IOOptimized             *bool
+	IOOptimized             confighelper.Trilean
 	InstanceType            string
 	UserData                string
 	UserDataFile            string
@@ -143,12 +143,10 @@ func (s *stepCreateAlicloudInstance) buildCreateInstanceRequest(state multistep.
 	request.InternetChargeType = s.InternetChargeType
 	request.InternetMaxBandwidthOut = requests.Integer(convertNumber(s.InternetMaxBandwidthOut))
 
-	if s.IOOptimized != nil {
-		if *s.IOOptimized {
-			request.IoOptimized = IOOptimizedOptimized
-		} else {
-			request.IoOptimized = IOOptimizedNone
-		}
+	if s.IOOptimized.True() {
+		request.IoOptimized = IOOptimizedOptimized
+	} else if IOOptimized.False() {
+		request.IoOptimized = IOOptimizedNone
 	}
 
 	config := state.Get("config").(*Config)