foundation for virtualbox builder

builder/virtualbox/builder.go

+package virtualbox
+
+import (
+	"github.com/mitchellh/mapstructure"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+const BuilderId = "mitchellh.virtualbox"
+
+type Builder struct {
+	config config
+	runner multistep.Runner
+}
+
+type config struct {
+	OutputDir string `mapstructure:"output_directory"`
+}
+
+func (b *Builder) Prepare(raw interface{}) error {
+	if err := mapstructure.Decode(raw, &b.config); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) packer.Artifact {
+	return nil
+}
+
+func (b *Builder) Cancel() {
+}

builder/virtualbox/builder_test.go

+package virtualbox
+
+import (
+	"github.com/mitchellh/packer/packer"
+	"testing"
+)
+
+func testConfig() map[string]interface{} {
+	return map[string]interface{}{}
+}
+
+func TestBuilder_ImplementsBuilder(t *testing.T) {
+	var raw interface{}
+	raw = &Builder{}
+	if _, ok := raw.(packer.Builder); !ok {
+		t.Error("Builder must implement builder.")
+	}
+}

config.go

@@ -18,6 +18,7 @@ const defaultConfig = `
 
 	"builders": {
 		"amazon-ebs": "packer-builder-amazon-ebs",
+		"virtualbox": "packer-builder-virtualbox",
 		"vmware": "packer-builder-vmware"
 	},
 

plugin/builder-virtualbox/main.go

+package main
+
+import (
+	"github.com/mitchellh/packer/builder/virtualbox"
+	"github.com/mitchellh/packer/packer/plugin"
+)
+
+func main() {
+	plugin.ServeBuilder(new(virtualbox.Builder))
+}