clap_nested_commands/
sync_commands.rs

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#[macro_export]
macro_rules! generate_sync_commands {
    // 1) No return type, no default command
    ($($(#[$attr:meta])* $module:ident),*) => (
        generate_sync_commands!(return_type = (); $($(#[$attr])* $module),*);
    );

    // 2) With return type, no default command
    (return_type = $return_type:ty; $($(#[$attr:meta])* $module:ident),*) => (
        paste::paste! {
            #[derive(Debug, Subcommand)]
            pub enum Commands {
                $(
                    $(#[$attr])*
                    [<$module:camel>]($module::Command),
                )*
            }

            pub fn execute(cli_context: &CliContext, cmd: Command) -> $return_type {
                match cmd.command {
                    $(
                        Commands::[<$module:camel>](cmd) => $module::execute(cli_context, cmd),
                    )*
                }
            }
        }
    );

    // 3) No return type, with default command
    (default_command = $default:ident; $($(#[$attr:meta])* $module:ident),*) => (
        generate_sync_commands!(return_type = (), default_command = $default; $($(#[$attr])* $module),*);
    );

    // 4) With return type, with default command
    (return_type = $return_type:ty, default_command = $default:ident; $($(#[$attr:meta])* $module:ident),*) => (
        paste::paste! {
            #[derive(Debug, Subcommand)]
            pub enum Commands {
                $(
                    $(#[$attr])*
                    [<$module:camel>]($module::Command),
                )*
            }

            pub fn execute(cli_context: &CliContext, cmd: Command) -> $return_type {
                match cmd.command {
                    $(
                        Some(Commands::[<$module:camel>](cmd)) => $module::execute(cli_context, cmd),
                    )*
                    None => $default::execute(cli_context, $default::Command::default()),
                }
            }
        }
    );
}