use std::str::FromStr; #[derive(Eq, PartialEq, Debug)]pub enum Protocol {    V1,    V2,} impl FromStr for Protocol {    type Err = String;     fn from_str(s: &str) -> Result<Self, Self::Err> {        Ok(match s {            "1" => Protocol::V1,            "2" => Protocol::V2,            _ => return Err(format!("Unsupported protocol version '{}', choose '1' or '2'", s)),        })    }} #[cfg(any(feature = "blocking-client", feature = "async-client"))]mod impls {    use git_repository::protocol::transport;     use super::Protocol;     impl From<Protocol> for transport::Protocol {        fn from(v: Protocol) -> Self {            match v {                Protocol::V1 => transport::Protocol::V1,                Protocol::V2 => transport::Protocol::V2,            }        }    }} impl Default for Protocol {    fn default() -> Self {        // Note that it's very important this remains V2, as V1 may block forever in stateful (i.e. non-http) connections when fetching        // as we chose not to complicate matters by counting which arguments where sent (just yet).        Protocol::V2    }} #[cfg(any(feature = "async-client", feature = "blocking-client"))]pub use git_repository::protocol::transport::connect;