builder/virtualbox: proper artifact [GH-23]

builder/virtualbox/artifact.go

+package virtualbox
+
+import (
+	"fmt"
+	"os"
+)
+
+// Artifact is the result of running the VirtualBox builder, namely a set
+// of files associated with the resulting machine.
+type Artifact struct {
+	dir string
+	f []string
+}
+
+func (*Artifact) BuilderId() string {
+	return BuilderId
+}
+
+func (a *Artifact) Files() []string {
+	return a.f
+}
+
+func (*Artifact) Id() string {
+	return "VM"
+}
+
+func (a *Artifact) String() string {
+	return fmt.Sprintf("VM files in directory: %s", a.dir)
+}
+
+func (a *Artifact) Destroy() error {
+	return os.RemoveAll(a.dir)
+}

builder/virtualbox/builder.go

@@ -11,6 +11,7 @@ import (
 	"net/url"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"strings"
 	"time"
 )
@@ -231,7 +232,26 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		return nil, rawErr.(error)
 	}
 
-	return nil, nil
+	// Compile the artifact list
+	files := make([]string, 0, 5)
+	visit := func(path string, info os.FileInfo, err error) error {
+		if !info.IsDir() {
+			files = append(files, path)
+		}
+
+		return err
+	}
+
+	if err := filepath.Walk(b.config.OutputDir, visit); err != nil {
+		return nil, err
+	}
+
+	artifact := &Artifact{
+		dir: b.config.OutputDir,
+		f: files,
+	}
+
+	return artifact, nil
 }
 
 func (b *Builder) Cancel() {