use log::debug;

    New { name: String },

    New {
        name: String,
        #[clap(long = "empty")]
        empty: bool,
        #[clap(long = "force", short = 'f')]
        force: bool,
    },

            Some(SubCommand::New { name }) => {

            Some(SubCommand::New { name, empty, force }) => {
                if empty && !force {
                    bail!("If creating an empty channel is really what you want, please use -f.")
                }

                txn.open_or_create_channel(&name)?;

                let new = txn.open_or_create_channel(&name)?;
                if !empty {
                    // Safeguard: apply the root patch if we're creating a new channel.
                    let current = txn.current_channel()?;
                    let channel = if let Some(channel) = txn.load_channel(current)? {
                        channel
                    } else {
                        bail!("No such channel: {:?}", current)
                    };
                    let ch = channel.read();
                    use libpijul::{GraphTxnT, MutTxnTExt};
                    let h = if let Some(Ok((k, v))) =
                        libpijul::pristine::changeid_log(&txn, &ch, 0u64.into())?.next()
                    {
                        debug!("initial patch on current channel: {:?} {:?}", k, v);
                        Some(txn.get_external(&v.a)?.unwrap().into())
                    } else {
                        None
                    };
                    if let Some(h) = h {
                        let mut new = new.write();
                        txn.apply_change(&repo.changes, &mut new, &h)?;
                    }
                }