github.com/mitchellh/packer@v1.3.2/builder/null/builder.go (about)

     1  package null
     2  
     3  import (
     4  	"log"
     5  
     6  	"github.com/hashicorp/packer/common"
     7  	"github.com/hashicorp/packer/helper/communicator"
     8  	"github.com/hashicorp/packer/helper/multistep"
     9  	"github.com/hashicorp/packer/packer"
    10  )
    11  
    12  const BuilderId = "fnoeding.null"
    13  
    14  type Builder struct {
    15  	config *Config
    16  	runner multistep.Runner
    17  }
    18  
    19  func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
    20  	c, warnings, errs := NewConfig(raws...)
    21  	if errs != nil {
    22  		return warnings, errs
    23  	}
    24  	b.config = c
    25  
    26  	return warnings, nil
    27  }
    28  
    29  func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
    30  	steps := []multistep.Step{}
    31  
    32  	if b.config.CommConfig.Type != "none" {
    33  		steps = append(steps,
    34  			&communicator.StepConnect{
    35  				Config:    &b.config.CommConfig,
    36  				Host:      CommHost(b.config.CommConfig.Host()),
    37  				SSHConfig: b.config.CommConfig.SSHConfigFunc(),
    38  			},
    39  		)
    40  	}
    41  
    42  	steps = append(steps,
    43  		new(common.StepProvision),
    44  	)
    45  
    46  	// Setup the state bag and initial state for the steps
    47  	state := new(multistep.BasicStateBag)
    48  	state.Put("config", b.config)
    49  	state.Put("hook", hook)
    50  	state.Put("ui", ui)
    51  
    52  	// Run!
    53  	b.runner = common.NewRunner(steps, b.config.PackerConfig, ui)
    54  	b.runner.Run(state)
    55  
    56  	// If there was an error, return that
    57  	if rawErr, ok := state.GetOk("error"); ok {
    58  		return nil, rawErr.(error)
    59  	}
    60  
    61  	// No errors, must've worked
    62  	artifact := &NullArtifact{}
    63  	return artifact, nil
    64  }
    65  
    66  func (b *Builder) Cancel() {
    67  	if b.runner != nil {
    68  		log.Println("Cancelling the step runner...")
    69  		b.runner.Cancel()
    70  	}
    71  }