custom traverse

internal/traverse/traverse.go

@@ -0,0 +1,27 @@
+package traverse
+
+import "github.com/spf13/cobra"
+
+func Traverse(cmd *cobra.Command, args []string) (*cobra.Command, error) {
+	return traverse(cmd, args[:len(args)-1])
+}
+
+func traverse(cmd *cobra.Command, args []string) (*cobra.Command, error) {
+	preRun(cmd, args)
+
+	if err := cmd.ParseFlags(args); err != nil { // TODO filter errors
+		return nil, err
+	} else {
+		args = cmd.Flags().Args()
+	}
+
+	return cmd, nil
+}
+
+func preRun(cmd *cobra.Command, args []string) {
+	if subcommand, _, err := cmd.Find([]string{"_carapace"}); err != nil {
+		if subcommand.PreRun != nil {
+			subcommand.PreRun(cmd, args)
+		}
+	}
+}