github.com/sneal/packer@v0.5.2/builder/virtualbox/common/step_output_dir.go (about)

     1  package common
     2  
     3  import (
     4  	"fmt"
     5  	"log"
     6  	"os"
     7  	"path/filepath"
     8  	"time"
     9  
    10  	"github.com/mitchellh/multistep"
    11  	"github.com/mitchellh/packer/packer"
    12  )
    13  
    14  // StepOutputDir sets up the output directory by creating it if it does
    15  // not exist, deleting it if it does exist and we're forcing, and cleaning
    16  // it up when we're done with it.
    17  type StepOutputDir struct {
    18  	Force bool
    19  	Path  string
    20  }
    21  
    22  func (s *StepOutputDir) Run(state multistep.StateBag) multistep.StepAction {
    23  	ui := state.Get("ui").(packer.Ui)
    24  
    25  	if _, err := os.Stat(s.Path); err == nil && s.Force {
    26  		ui.Say("Deleting previous output directory...")
    27  		os.RemoveAll(s.Path)
    28  	}
    29  
    30  	// Create the directory
    31  	if err := os.MkdirAll(s.Path, 0755); err != nil {
    32  		state.Put("error", err)
    33  		return multistep.ActionHalt
    34  	}
    35  
    36  	// Make sure we can write in the directory
    37  	f, err := os.Create(filepath.Join(s.Path, "_packer_perm_check"))
    38  	if err != nil {
    39  		err = fmt.Errorf("Couldn't write to output directory: %s", err)
    40  		state.Put("error", err)
    41  		return multistep.ActionHalt
    42  	}
    43  	f.Close()
    44  	os.Remove(f.Name())
    45  
    46  	return multistep.ActionContinue
    47  }
    48  
    49  func (s *StepOutputDir) Cleanup(state multistep.StateBag) {
    50  	_, cancelled := state.GetOk(multistep.StateCancelled)
    51  	_, halted := state.GetOk(multistep.StateHalted)
    52  
    53  	if cancelled || halted {
    54  		ui := state.Get("ui").(packer.Ui)
    55  
    56  		ui.Say("Deleting output directory...")
    57  		for i := 0; i < 5; i++ {
    58  			err := os.RemoveAll(s.Path)
    59  			if err == nil {
    60  				break
    61  			}
    62  
    63  			log.Printf("Error removing output dir: %s", err)
    64  			time.Sleep(2 * time.Second)
    65  		}
    66  	}
    67  }