package docker import ( "fmt" "github.com/mitchellh/multistep" "github.com/mitchellh/packer/packer" "log" ) type StepPull struct{} func (s *StepPull) Run(state multistep.StateBag) multistep.StepAction { config := state.Get("config").(*Config) driver := state.Get("driver").(Driver) ui := state.Get("ui").(packer.Ui) if !config.Pull { log.Println("Pull disabled, won't docker pull") return multistep.ActionContinue } ui.Say(fmt.Sprintf("Pulling Docker image: %s", config.Image)) if err := driver.Pull(config.Image); err != nil { err := fmt.Errorf("Error pulling Docker image: %s", err) state.Put("error", err) ui.Error(err.Error()) return multistep.ActionHalt } return multistep.ActionContinue } func (s *StepPull) Cleanup(state multistep.StateBag) { }