updated overlay includes mire vars and split func

internal/pkg/overlay/datastructure.go

@@ -37,4 +37,8 @@ type TemplateStruct struct {
 	Dhcp           warewulfconf.DhcpConf
 	Nfs            warewulfconf.NfsConf
 	Warewulf       warewulfconf.WarewulfConf
+	Overlays       []string
+	Containers     []string
+	Kernels        []string
+	Profiles       []string
 }

internal/pkg/overlay/overlay.go

@@ -17,6 +17,8 @@ import (
 	"text/template"
 	"time"
 
+	"github.com/hpcng/warewulf/internal/pkg/container"
+	"github.com/hpcng/warewulf/internal/pkg/kernel"
 	"github.com/hpcng/warewulf/internal/pkg/node"
 	"github.com/hpcng/warewulf/internal/pkg/util"
 	"github.com/hpcng/warewulf/internal/pkg/warewulfconf"
@@ -301,6 +303,15 @@ func BuildOverlayIndir(nodeInfo node.NodeInfo, overlayNames []string, outputDir
 	dt := time.Now()
 	tstruct.BuildTime = dt.Format("01-02-2006 15:04:05 MST")
 	tstruct.BuildTimeUnix = strconv.FormatInt(dt.Unix(), 10)
+	tstruct.Containers, _ = container.ListSources()
+	profiles, _ := nodeDB.FindAllProfiles()
+	var profileList []string
+	for _, profile := range profiles {
+		profileList = append(profileList, profile.Id.Get())
+	}
+	tstruct.Profiles = profileList
+	tstruct.Overlays, _ = FindOverlays()
+	tstruct.Kernels, _ = kernel.ListKernels()
 	for _, overlayName := range overlayNames {
 		wwlog.Printf(wwlog.VERBOSE, "Building overlay %s for node %s in %s\n", overlayName, nodeInfo.Id.Get(), outputDir)
 		overlaySourceDir := OverlaySourceDir(overlayName)
@@ -360,6 +371,9 @@ func BuildOverlayIndir(nodeInfo node.NodeInfo, overlayNames []string, outputDir
 						backupFile = false
 						return ""
 					},
+					"split": func(s string, d string) []string {
+						return strings.Split(s, d)
+					},
 					// }).ParseGlob(path.Join(OverlayDir, destFile+".ww*"))
 				}).ParseGlob(location)
 				if err != nil {