Windows: Updates Windows Vendoring

Updates windows dependent libraries for vendoing.

vendor/github.com/Microsoft/hcsshim/test/functional/utilities/layerfolders.go

@@ -0,0 +1,54 @@
+package testutilities
+
+import (
+	"bytes"
+	"encoding/json"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+var imageLayers map[string][]string
+
+func init() {
+	imageLayers = make(map[string][]string)
+}
+
+func LayerFolders(t *testing.T, imageName string) []string {
+	if _, ok := imageLayers[imageName]; !ok {
+		imageLayers[imageName] = getLayers(t, imageName)
+	}
+	return imageLayers[imageName]
+}
+
+func getLayers(t *testing.T, imageName string) []string {
+	cmd := exec.Command("docker", "inspect", imageName, "-f", `"{{.GraphDriver.Data.dir}}"`)
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	if err := cmd.Run(); err != nil {
+		t.Skipf("Failed to find layers for %q. Check docker images", imageName)
+	}
+	imagePath := strings.Replace(strings.TrimSpace(out.String()), `"`, ``, -1)
+	layers := getLayerChain(t, imagePath)
+	return append([]string{imagePath}, layers...)
+}
+
+func getLayerChain(t *testing.T, layerFolder string) []string {
+	jPath := filepath.Join(layerFolder, "layerchain.json")
+	content, err := ioutil.ReadFile(jPath)
+	if os.IsNotExist(err) {
+		t.Fatalf("layerchain not found")
+	} else if err != nil {
+		t.Fatalf("failed to read layerchain")
+	}
+
+	var layerChain []string
+	err = json.Unmarshal(content, &layerChain)
+	if err != nil {
+		t.Fatalf("failed to unmarshal layerchain")
+	}
+	return layerChain
+}