Function effective_host 

pub fn effective_host(
    endpoint: &RemoteEndpoint,
    workdir: &Path,
    remote: &AliasRemote,
    cancel: &CancelToken,
) -> Result<String, EffectiveHostError>

Resolve an SSH alias against OpenSSH’s effective configuration on the endpoint (ssh -G run remotely): the alias belongs to the machine whose remote carries it, and evaluating it with the local user’s config would answer for the wrong host. Owned worker work, cancellable like every bounded remote run.