Use contexts with amazon waiters.

builder/amazon/common/step_run_source_instance.go

@@ -39,7 +39,7 @@ type StepRunSourceInstance struct {
 	instanceId string
 }
 
-func (s *StepRunSourceInstance) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
+func (s *StepRunSourceInstance) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
 	ec2conn := state.Get("ec2").(*ec2.EC2)
 	var keyName string
 	if name, ok := state.GetOk("keyPair"); ok {
@@ -185,7 +185,7 @@ func (s *StepRunSourceInstance) Run(_ context.Context, state multistep.StateBag)
 	describeInstance := &ec2.DescribeInstancesInput{
 		InstanceIds: []*string{aws.String(instanceId)},
 	}
-	if err := ec2conn.WaitUntilInstanceRunning(describeInstance); err != nil {
+	if err := ec2conn.WaitUntilInstanceRunningWithContext(ctx, describeInstance); err != nil {
 		err := fmt.Errorf("Error waiting for instance (%s) to become ready: %s", instanceId, err)
 		state.Put("error", err)
 		ui.Error(err.Error())

builder/amazon/common/step_run_spot_instance.go

@@ -43,7 +43,7 @@ type StepRunSpotInstance struct {
 	spotRequest *ec2.SpotInstanceRequest
 }
 
-func (s *StepRunSpotInstance) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
+func (s *StepRunSpotInstance) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
 	ec2conn := state.Get("ec2").(*ec2.EC2)
 	var keyName string
 	if name, ok := state.GetOk("keyPair"); ok {
@@ -235,7 +235,7 @@ func (s *StepRunSpotInstance) Run(_ context.Context, state multistep.StateBag) m
 	describeInstance := &ec2.DescribeInstancesInput{
 		InstanceIds: []*string{aws.String(instanceId)},
 	}
-	if err := ec2conn.WaitUntilInstanceRunning(describeInstance); err != nil {
+	if err := ec2conn.WaitUntilInstanceRunningWithContext(ctx, describeInstance); err != nil {
 		err := fmt.Errorf("Error waiting for instance (%s) to become ready: %s", instanceId, err)
 		state.Put("error", err)
 		ui.Error(err.Error())

builder/amazon/common/step_stop_ebs_instance.go

@@ -16,7 +16,7 @@ type StepStopEBSBackedInstance struct {
 	DisableStopInstance bool
 }
 
-func (s *StepStopEBSBackedInstance) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
+func (s *StepStopEBSBackedInstance) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
 	ec2conn := state.Get("ec2").(*ec2.EC2)
 	instance := state.Get("instance").(*ec2.Instance)
 	ui := state.Get("ui").(packer.Ui)
@@ -78,7 +78,7 @@ func (s *StepStopEBSBackedInstance) Run(_ context.Context, state multistep.State
 
 	// Wait for the instance to actually stop
 	ui.Say("Waiting for the instance to stop...")
-	err = ec2conn.WaitUntilInstanceStopped(&ec2.DescribeInstancesInput{
+	err = ec2conn.WaitUntilInstanceStoppedWithContext(ctx, &ec2.DescribeInstancesInput{
 		InstanceIds: []*string{instance.InstanceId},
 	})