Re: [Libguestfs] [PATCH v3 5/8] builder, v2v: Use imperative list functions to simplify curl arg code.

- let curl_args = - curl_args @ - if verbose () then [] - else if progress_bar then [ "progress-bar", None ] - else quiet_args in + if verbose () then () + else if progress_bar then push curl_args ("progress-bar", None) + else append curl_args quiet_args;