package docker import ( "github.com/mitchellh/multistep" "github.com/mitchellh/packer/common" "github.com/mitchellh/packer/packer" "log" ) const BuilderId = "packer.docker" type Builder struct { config *Config runner multistep.Runner } func (b *Builder) Prepare(raws ...interface{}) ([]string, error) { c, warnings, errs := NewConfig(raws...) if errs != nil { return warnings, errs } b.config = c return warnings, nil } func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) { driver := &DockerDriver{Ui: ui} if err := driver.Verify(); err != nil { return nil, err } steps := []multistep.Step{ &StepTempDir{}, &StepPull{}, &StepRun{}, &StepProvision{}, &StepExport{}, } // Setup the state bag and initial state for the steps state := new(multistep.BasicStateBag) state.Put("config", b.config) state.Put("hook", hook) state.Put("ui", ui) // Setup the driver that will talk to Docker state.Put("driver", driver) // Run! if b.config.PackerDebug { b.runner = &multistep.DebugRunner{ Steps: steps, PauseFn: common.MultistepDebugFn(ui), } } else { b.runner = &multistep.BasicRunner{Steps: steps} } b.runner.Run(state) // If there was an error, return that if rawErr, ok := state.GetOk("error"); ok { return nil, rawErr.(error) } // No errors, must've worked artifact := &ExportArtifact{path: b.config.ExportPath} return artifact, nil } func (b *Builder) Cancel() { if b.runner != nil { log.Println("Cancelling the step runner...") b.runner.Cancel() } }