added version information

Makefile

@@ -115,7 +115,7 @@ debfiles: debian
 	cp wwclient $(DESTDIR)/var/warewulf/overlays/system/debian/warewulf/bin/
 
 wwctl:
-	cd cmd/wwctl; GOOS=linux go build -mod vendor -tags "$(WW_BUILD_GO_BUILD_TAGS)" -o ../../wwctl
+	cd cmd/wwctl; GOOS=linux go build -ldflags="-X 'github.com/hpcng/warewulf/internal/app/wwctl/version/version.Version=$(VERSION)'" -mod vendor -tags "$(WW_BUILD_GO_BUILD_TAGS)" -o ../../wwctl
 
 wwclient:
 	cd cmd/wwclient; CGO_ENABLED=0 GOOS=linux go build -mod vendor -a -ldflags '-extldflags -static' -o ../../wwclient

internal/app/wwctl/root.go

@@ -9,6 +9,7 @@ import (
 	"github.com/hpcng/warewulf/internal/app/wwctl/power"
 	"github.com/hpcng/warewulf/internal/app/wwctl/profile"
 	"github.com/hpcng/warewulf/internal/app/wwctl/server"
+	"github.com/hpcng/warewulf/internal/app/wwctl/version"
 	"github.com/hpcng/warewulf/internal/pkg/wwlog"
 	"github.com/hpcng/warewulf/internal/pkg/help"
 	"github.com/spf13/cobra"
@@ -46,6 +47,7 @@ func init() {
 	rootCmd.AddCommand(profile.GetCommand())
 	rootCmd.AddCommand(configure.GetCommand())
 	rootCmd.AddCommand(server.GetCommand())
+	rootCmd.AddCommand(version.GetCommand())
 
 }
 

internal/app/wwctl/version/main.go

@@ -0,0 +1,16 @@
+package version
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var Version = "development"
+
+func CobraRunE(cmd *cobra.Command, args []string) error {
+
+	fmt.Println("Version foo:\t", Version)
+
+	return nil
+}

internal/app/wwctl/version/root.go

@@ -0,0 +1,22 @@
+package version
+
+import "github.com/spf13/cobra"
+
+var (
+	baseCmd = &cobra.Command{
+		Use:     "version",
+		Short:   "Version information",
+		Long:    "This command will print the Warewulf version.",
+		RunE:    CobraRunE,
+		Args:    cobra.ExactArgs(0),
+		Aliases: []string{"vers"},
+	}
+)
+
+func init() {
+}
+
+// GetRootCommand returns the root cobra.Command for the application.
+func GetCommand() *cobra.Command {
+	return baseCmd
+}