added wwctl genconf used to generate completions

Signed-off-by: Christian Goll <cgoll@suse.de>

internal/app/wwctl/genconf/completions/main.go

@@ -0,0 +1,23 @@
+package completions
+
+import (
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+func CobraRunE(cmd *cobra.Command, args []string) error {
+	myArg := "bash"
+	if len(args) == 1 {
+		myArg = args[0]
+	}
+	switch myArg {
+	case "zsh":
+		cmd.GenZshCompletion(os.Stdout)
+	case "fish":
+		cmd.GenFishCompletion(os.Stdout, true)
+	default:
+		cmd.GenBashCompletion(os.Stdout)
+	}
+	return nil
+}

internal/app/wwctl/genconf/completions/root.go

@@ -0,0 +1,22 @@
+package completions
+
+import "github.com/spf13/cobra"
+
+var (
+	baseCmd = &cobra.Command{
+		Use:     "completions",
+		Short:   "shell completion",
+		Long:    "This command generates the bash completions if no argument is given.",
+		RunE:    CobraRunE,
+		Args:    cobra.MaximumNArgs(1),
+		Aliases: []string{"bash"},
+	}
+	Zsh bool
+)
+
+func init() {
+}
+
+func GetCommand() *cobra.Command {
+	return baseCmd
+}

internal/app/wwctl/genconf/root.go

@@ -0,0 +1,26 @@
+package genconf
+
+import (
+	"github.com/hpcng/warewulf/internal/app/wwctl/genconf/completions"
+	"github.com/spf13/cobra"
+)
+
+var (
+	baseCmd = &cobra.Command{
+		Use:     "genconfig",
+		Short:   "Generate various configurations",
+		Long:    "This command will allow you to generate different configurations like bash-completions.",
+		Args:    cobra.ExactArgs(0),
+		Aliases: []string{"cnf"},
+	}
+	ListFull bool
+)
+
+func init() {
+	baseCmd.AddCommand(completions.GetCommand())
+}
+
+// GetRootCommand returns the root cobra.Command for the application.
+func GetCommand() *cobra.Command {
+	return baseCmd
+}

internal/app/wwctl/root.go

@@ -3,6 +3,7 @@ package wwctl
 import (
 	"github.com/hpcng/warewulf/internal/app/wwctl/configure"
 	"github.com/hpcng/warewulf/internal/app/wwctl/container"
+	"github.com/hpcng/warewulf/internal/app/wwctl/genconf"
 	"github.com/hpcng/warewulf/internal/app/wwctl/kernel"
 	"github.com/hpcng/warewulf/internal/app/wwctl/node"
 	"github.com/hpcng/warewulf/internal/app/wwctl/overlay"
@@ -52,6 +53,7 @@ func init() {
 	rootCmd.AddCommand(server.GetCommand())
 	rootCmd.AddCommand(version.GetCommand())
 	rootCmd.AddCommand(ssh.GetCommand())
+	rootCmd.AddCommand(genconf.GetCommand())
 }
 
 // GetRootCommand returns the root cobra.Command for the application.