github.com/rothwerx/packer@v0.9.0/builder/null/builder.go (about) 1 package null 2 3 import ( 4 "log" 5 6 "github.com/mitchellh/multistep" 7 "github.com/mitchellh/packer/common" 8 "github.com/mitchellh/packer/helper/communicator" 9 "github.com/mitchellh/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 &communicator.StepConnect{ 32 Config: &b.config.CommConfig, 33 Host: CommHost(b.config.CommConfig.SSHHost), 34 SSHConfig: SSHConfig( 35 b.config.CommConfig.SSHUsername, 36 b.config.CommConfig.SSHPassword, 37 b.config.CommConfig.SSHPrivateKey), 38 }, 39 &common.StepProvision{}, 40 } 41 42 // Setup the state bag and initial state for the steps 43 state := new(multistep.BasicStateBag) 44 state.Put("config", b.config) 45 state.Put("hook", hook) 46 state.Put("ui", ui) 47 48 // Run! 49 if b.config.PackerDebug { 50 b.runner = &multistep.DebugRunner{ 51 Steps: steps, 52 PauseFn: common.MultistepDebugFn(ui), 53 } 54 } else { 55 b.runner = &multistep.BasicRunner{Steps: steps} 56 } 57 58 b.runner.Run(state) 59 60 // If there was an error, return that 61 if rawErr, ok := state.GetOk("error"); ok { 62 return nil, rawErr.(error) 63 } 64 65 // No errors, must've worked 66 artifact := &NullArtifact{} 67 return artifact, nil 68 } 69 70 func (b *Builder) Cancel() { 71 if b.runner != nil { 72 log.Println("Cancelling the step runner...") 73 b.runner.Cancel() 74 } 75 }