bcachefs-tools: make targets of subvolume create/delete required

Currently, when no targets are provided for "bcachefs subvolume create" or
"bcachefs subvolume delete", it will exit silently with code 0. Make targets
(arguments) required to solve this problem.

This patch solves issue https://github.com/koverstreet/bcachefs/issues/766.

Signed-off-by: Integral <integral@archlinuxcn.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

src/commands/subvolume.rs

@@ -18,12 +18,14 @@ enum Subcommands {
     #[command(visible_aliases = ["new"])]
     Create {
         /// Paths
+        #[arg(required = true)]
         targets: Vec<PathBuf>,
     },
 
     #[command(visible_aliases = ["del"])]
     Delete {
         /// Path
+        #[arg(required = true)]
         targets: Vec<PathBuf>,
     },