Restored deleted kernel components for overrides

internal/app/wwctl/kernel/list/main.go

@@ -0,0 +1,35 @@
+package list
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/hpcng/warewulf/internal/pkg/kernel"
+	"github.com/hpcng/warewulf/internal/pkg/node"
+	"github.com/hpcng/warewulf/internal/pkg/wwlog"
+	"github.com/spf13/cobra"
+)
+
+func CobraRunE(cmd *cobra.Command, args []string) error {
+
+	kernels, err := kernel.ListKernels()
+	if err != nil {
+		wwlog.Printf(wwlog.ERROR, "%s\n", err)
+		os.Exit(1)
+	}
+
+	nconfig, _ := node.New()
+	nodes, _ := nconfig.FindAllNodes()
+	nodemap := make(map[string]int)
+
+	for _, n := range nodes {
+		nodemap[n.KernelVersion.Get()]++
+	}
+
+	fmt.Printf("%-35s %-25s %-6s\n", "KERNEL NAME", "KERNEL VERSION", "NODES")
+	for _, k := range kernels {
+		fmt.Printf("%-35s %-25s %6d\n", k, kernel.GetKernelVersion(k), nodemap[k])
+	}
+
+	return nil
+}