refactor: Rewrote in golang.

cmd/nushell_completion.go

@@ -0,0 +1,26 @@
+package cmd
+
+import (
+	_ "embed"
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+//go:embed mod.nu
+var completion string
+
+// nushellCompletionCmd represents the nushellCompletion command
+var nushellCompletionCmd = &cobra.Command{
+	Use:   "nushell-completion",
+	Short: "Generate custom completions for nushell",
+	Long: `At time of writing, cobra does not natively support nushell,
+so a custom command had to be written`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println(completion)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(nushellCompletionCmd)
+}