Windows: Updates Windows Vendoring

Updates windows dependent libraries for vendoing.

vendor/github.com/Microsoft/hcsshim/cmd/wclayer/mount.go

@@ -0,0 +1,88 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/Microsoft/hcsshim"
+	"github.com/Microsoft/hcsshim/internal/appargs"
+	"github.com/urfave/cli"
+)
+
+var mountCommand = cli.Command{
+	Name:      "mount",
+	Usage:     "mounts a scratch",
+	ArgsUsage: "<scratch path>",
+	Flags: []cli.Flag{
+		cli.StringSliceFlag{
+			Name:  "layer, l",
+			Usage: "paths to the parent layers for this layer",
+		},
+	},
+	Action: func(context *cli.Context) (err error) {
+		if context.NArg() != 1 {
+			return errors.New("invalid usage")
+		}
+		path, err := filepath.Abs(context.Args().First())
+		if err != nil {
+			return err
+		}
+
+		layers, err := normalizeLayers(context.StringSlice("layer"), true)
+		if err != nil {
+			return err
+		}
+
+		err = hcsshim.ActivateLayer(driverInfo, path)
+		if err != nil {
+			return err
+		}
+		defer func() {
+			if err != nil {
+				hcsshim.DeactivateLayer(driverInfo, path)
+			}
+		}()
+
+		err = hcsshim.PrepareLayer(driverInfo, path, layers)
+		if err != nil {
+			return err
+		}
+		defer func() {
+			if err != nil {
+				hcsshim.UnprepareLayer(driverInfo, path)
+			}
+		}()
+
+		mountPath, err := hcsshim.GetLayerMountPath(driverInfo, path)
+		if err != nil {
+			return err
+		}
+		_, err = fmt.Println(mountPath)
+		return err
+	},
+}
+
+var unmountCommand = cli.Command{
+	Name:      "unmount",
+	Usage:     "unmounts a scratch",
+	ArgsUsage: "<layer path>",
+	Before:    appargs.Validate(appargs.NonEmptyString),
+	Action: func(context *cli.Context) (err error) {
+		path, err := filepath.Abs(context.Args().First())
+		if err != nil {
+			return err
+		}
+
+		err = hcsshim.UnprepareLayer(driverInfo, path)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+		}
+		err = hcsshim.DeactivateLayer(driverInfo, path)
+		if err != nil {
+			return err
+		}
+		return nil
+	},
+}