Fleshed out the framework of most of the wwctl overlay command group.

internal/app/wwctl/overlay/mkdir/main.go

@@ -0,0 +1,71 @@
+package mkdir
+
+import (
+	"fmt"
+	"github.com/hpcng/warewulf/internal/pkg/assets"
+	"github.com/hpcng/warewulf/internal/pkg/config"
+	"github.com/hpcng/warewulf/internal/pkg/overlay"
+	"github.com/hpcng/warewulf/internal/pkg/util"
+	"github.com/hpcng/warewulf/internal/pkg/wwlog"
+	"github.com/spf13/cobra"
+	"os"
+	"path"
+)
+
+func CobraRunE(cmd *cobra.Command, args []string) error {
+	config := config.New()
+	var overlaySourceDir string
+//	mode := uint32(strconv.ParseUint(PermMode, 8, 32))
+
+
+	if SystemOverlay == true {
+		overlaySourceDir = config.SystemOverlaySource(args[0])
+	} else {
+		overlaySourceDir = config.RuntimeOverlaySource(args[0])
+	}
+
+	if util.IsDir(overlaySourceDir) == false {
+		wwlog.Printf(wwlog.ERROR, "Overlay does not exist: %s\n", args[0])
+		os.Exit(1)
+	}
+
+	overlayDir := path.Join(overlaySourceDir, args[1])
+
+	wwlog.Printf(wwlog.DEBUG, "Will create directory in overlay: %s:%s\n", args[0], overlayDir)
+
+	err := os.MkdirAll(overlayDir, 0755)
+	if err != nil {
+		wwlog.Printf(wwlog.ERROR, "Could not create directory: %s\n", path.Dir(overlayDir))
+		os.Exit(1)
+	}
+
+	fmt.Printf("Created directory within overlay: %s:%s\n", args[0], args[1])
+
+	// Everything below this point is to update the relevant overlays
+	nodes, err := assets.FindAllNodes()
+	if err != nil {
+		wwlog.Printf(wwlog.ERROR, "Cloud not get nodeList: %s\n", err)
+		os.Exit(1)
+	}
+
+	var updateNodes []assets.NodeInfo
+
+	for _, node := range nodes {
+		if SystemOverlay == true && node.SystemOverlay == args[0] {
+			updateNodes = append(updateNodes, node)
+		} else if node.RuntimeOverlay == args[0] {
+			updateNodes = append(updateNodes, node)
+		}
+
+	}
+
+	if SystemOverlay == true {
+		wwlog.Printf(wwlog.INFO, "Updating System Overlays...\n")
+		return overlay.SystemBuild(updateNodes, true)
+	} else {
+		wwlog.Printf(wwlog.INFO, "Updating Runtime Overlays...\n")
+		return overlay.RuntimeBuild(updateNodes, true)
+	}
+
+	return nil
+}