You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mirror.rs
    path of file: ./repos/cargo-fetcher/src/cmds
    
    the code of the file until where you have to start completion: use anyhow::Error;
use cf::{mirror, Ctx};
use tracing::{error, info};

#[derive(clap::Parser)]
pub struct Args {
    #[clap(
        short,
        default_value = "1d",
        long_help = "The duration for which the index will not be replaced after its most recent update.

Times may be specified with no suffix (default seconds), or one of:
* (s)econds
* (m)inutes
* (h)ours
* (d)ays

"
    )]
    max_stale: crate::Dur,
}
    
pub(crate) async fn cmd(ctx: Ctx, include_index: bool, args: Args) -> Result<(), Error> {
    let regs = ctx.registry_sets();

    async_scoped::TokioScope::scope_and_block(|s| {
        if include_index {
            s.spawn(async {
                mirror::registry_indices(&ctx, args.max_stale.0, regs).await;
                info!("finished uploading registry indices");
            });
        }

        s.spawn(async {
            match mirror::crates(&ctx).await {
                Ok(_) => info!("finished uploading crates"),
                Err(e) => error!("failed to mirror crates: {:#}", e),
            }
        });
    });

    Ok(())
}