package ecs import ( "fmt" "github.com/denverdino/aliyungo/common" "github.com/denverdino/aliyungo/ecs" "github.com/hashicorp/packer/packer" "github.com/mitchellh/multistep" ) type stepPreValidate struct { AlicloudDestImageName string ForceDelete bool } func (s *stepPreValidate) Run(state multistep.StateBag) multistep.StepAction { ui := state.Get("ui").(packer.Ui) if s.ForceDelete { ui.Say("Force delete flag found, skipping prevalidating image name.") return multistep.ActionContinue } client := state.Get("client").(*ecs.Client) config := state.Get("config").(Config) ui.Say("Prevalidating image name...") images, _, err := client.DescribeImages(&ecs.DescribeImagesArgs{ ImageName: s.AlicloudDestImageName, RegionId: common.Region(config.AlicloudRegion)}) if err != nil { err := fmt.Errorf("Error querying alicloud image: %s", err) state.Put("error", err) ui.Error(err.Error()) return multistep.ActionHalt } if len(images) > 0 { err := fmt.Errorf("Error: name conflicts with an existing alicloud image: %s", images[0].ImageId) state.Put("error", err) ui.Error(err.Error()) return multistep.ActionHalt } return multistep.ActionContinue } func (s *stepPreValidate) Cleanup(multistep.StateBag) {}