github.com/rothwerx/packer@v0.9.0/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  
    24  	if config.Login {
    25  		ui.Message("Logging in...")
    26  		err := driver.Login(
    27  			config.LoginServer,
    28  			config.LoginEmail,
    29  			config.LoginUsername,
    30  			config.LoginPassword)
    31  		if err != nil {
    32  			err := fmt.Errorf("Error logging in: %s", err)
    33  			state.Put("error", err)
    34  			ui.Error(err.Error())
    35  			return multistep.ActionHalt
    36  		}
    37  
    38  		defer func() {
    39  			ui.Message("Logging out...")
    40  			if err := driver.Logout(config.LoginServer); err != nil {
    41  				ui.Error(fmt.Sprintf("Error logging out: %s", err))
    42  			}
    43  		}()
    44  	}
    45  
    46  	if err := driver.Pull(config.Image); err != nil {
    47  		err := fmt.Errorf("Error pulling Docker image: %s", err)
    48  		state.Put("error", err)
    49  		ui.Error(err.Error())
    50  		return multistep.ActionHalt
    51  	}
    52  
    53  	return multistep.ActionContinue
    54  }
    55  
    56  func (s *StepPull) Cleanup(state multistep.StateBag) {
    57  }