github.com/sneal/packer@v0.5.2/builder/docker/step_pull.go (about)

     1  package docker
     2  
     3  import (
     4  	"fmt"
     5  	"github.com/mitchellh/multistep"
     6  	"github.com/mitchellh/packer/packer"
     7  	"log"
     8  )
     9  
    10  type StepPull struct{}
    11  
    12  func (s *StepPull) Run(state multistep.StateBag) multistep.StepAction {
    13  	config := state.Get("config").(*Config)
    14  	driver := state.Get("driver").(Driver)
    15  	ui := state.Get("ui").(packer.Ui)
    16  
    17  	if !config.Pull {
    18  		log.Println("Pull disabled, won't docker pull")
    19  		return multistep.ActionContinue
    20  	}
    21  
    22  	ui.Say(fmt.Sprintf("Pulling Docker image: %s", config.Image))
    23  	if err := driver.Pull(config.Image); err != nil {
    24  		err := fmt.Errorf("Error pulling Docker image: %s", err)
    25  		state.Put("error", err)
    26  		ui.Error(err.Error())
    27  		return multistep.ActionHalt
    28  	}
    29  
    30  	return multistep.ActionContinue
    31  }
    32  
    33  func (s *StepPull) Cleanup(state multistep.StateBag) {
    34  }