pub mod refs {    use git_repository::{        protocol,        protocol::{            fetch::{Action, Arguments, Ref, Response},            transport,        },    };     use crate::OutputFormat;     pub const PROGRESS_RANGE: std::ops::RangeInclusive<u8> = 1..=2;     use std::io;     #[derive(Default)]    struct LsRemotes {        refs: Vec<Ref>,    }     impl protocol::fetch::DelegateBlocking for LsRemotes {        fn prepare_fetch(            &mut self,            _version: transport::Protocol,            _server: &transport::client::Capabilities,            _features: &mut Vec<(&str, Option<&str>)>,            refs: &[Ref],        ) -> io::Result<Action> {            self.refs = refs.into();            Ok(Action::Cancel)        }         fn negotiate(            &mut self,            _refs: &[Ref],            _arguments: &mut Arguments,            _previous_response: Option<&Response>,        ) -> io::Result<Action> {            unreachable!("not to be called due to Action::Close in `prepare_fetch`")        }    }     #[cfg(feature = "async-client")]    mod async_io {        use std::io;         use async_trait::async_trait;        use futures_io::AsyncBufRead;        use git_repository::{            protocol,            protocol::fetch::{Ref, Response},            Progress,        };         use super::{Context, LsRemotes};        use crate::{net, remote::refs::print, OutputFormat};         #[async_trait(?Send)]        impl protocol::fetch::Delegate for LsRemotes {            async fn receive_pack(                &mut self,                input: impl AsyncBufRead + Unpin + 'async_trait,                progress: impl Progress,                refs: &[Ref],                previous_response: &Response,            ) -> io::Result<()> {                unreachable!("not called for ls-refs")            }        }         pub async fn list(            protocol: Option<net::Protocol>,            url: &str,            progress: impl Progress,            ctx: Context<impl io::Write + Send + 'static>,        ) -> anyhow::Result<()> {            let url = url.to_owned();            let transport = net::connect(url.as_bytes(), protocol.unwrap_or_default().into()).await?;            blocking::unblock(                // `blocking` really needs a way to unblock futures, which is what it does internally anyway.                // Both fetch() needs unblocking as it executes blocking code within the future, and the other                // block does blocking IO because it's primarily a blocking codebase.                move || {                    futures_lite::future::block_on(async move {                        let mut delegate = LsRemotes::default();                        protocol::fetch(                            transport,                            &mut delegate,                            protocol::credentials::helper,                            progress,                            protocol::FetchConnection::TerminateOnSuccessfulCompletion,                        )                        .await?;                         match ctx.format {                            OutputFormat::Human => drop(print(ctx.out, &delegate.refs)),                            #[cfg(feature = "serde1")]                            OutputFormat::Json => serde_json::to_writer_pretty(                                ctx.out,                                &delegate.refs.into_iter().map(super::JsonRef::from).collect::<Vec<_>>(),                            )?,                        }                        Ok(())                    })                },            )            .await        }    }    #[cfg(feature = "async-client")]    pub use self::async_io::list;     #[cfg(feature = "blocking-client")]    mod blocking_io {        use std::io;         use git_repository::{            protocol,            protocol::fetch::{Ref, Response},            Progress,        };         #[cfg(feature = "serde1")]        use super::JsonRef;        use super::{print, Context, LsRemotes};        use crate::{net, OutputFormat};         impl protocol::fetch::Delegate for LsRemotes {            fn receive_pack(                &mut self,                _input: impl io::BufRead,                _progress: impl Progress,                _refs: &[Ref],                _previous_response: &Response,            ) -> io::Result<()> {                unreachable!("not called for ls-refs")            }        }         pub fn list(            protocol: Option<net::Protocol>,            url: &str,            progress: impl Progress,            ctx: Context<impl io::Write>,        ) -> anyhow::Result<()> {            let transport = net::connect(url.as_bytes(), protocol.unwrap_or_default().into())?;            let mut delegate = LsRemotes::default();            protocol::fetch(                transport,                &mut delegate,                protocol::credentials::helper,                progress,                protocol::FetchConnection::TerminateOnSuccessfulCompletion,            )?;             match ctx.format {                OutputFormat::Human => drop(print(ctx.out, &delegate.refs)),                #[cfg(feature = "serde1")]                OutputFormat::Json => serde_json::to_writer_pretty(                    ctx.out,                    &delegate.refs.into_iter().map(JsonRef::from).collect::<Vec<_>>(),                )?,            };            Ok(())        }    }    #[cfg(feature = "blocking-client")]    pub use blocking_io::list;     pub struct Context<W: io::Write> {        pub thread_limit: Option<usize>,        pub format: OutputFormat,        pub out: W,    }     #[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]    pub enum JsonRef {        Peeled {            path: String,            tag: String,            object: String,        },        Direct {            path: String,            object: String,        },        Symbolic {            path: String,            target: String,            object: String,        },    }     impl From<Ref> for JsonRef {        fn from(value: Ref) -> Self {            match value {                Ref::Direct { path, object } => JsonRef::Direct {                    path: path.to_string(),                    object: object.to_string(),                },                Ref::Symbolic { path, target, object } => JsonRef::Symbolic {                    path: path.to_string(),                    target: target.to_string(),                    object: object.to_string(),                },                Ref::Peeled { path, tag, object } => JsonRef::Peeled {                    path: path.to_string(),                    tag: tag.to_string(),                    object: object.to_string(),                },            }        }    }     pub(crate) fn print(mut out: impl io::Write, refs: &[Ref]) -> io::Result<()> {        for r in refs {            match r {                Ref::Direct { path, object } => writeln!(&mut out, "{} {}", object.to_hex(), path),                Ref::Peeled { path, object, tag } => {                    writeln!(&mut out, "{} {} tag:{}", object.to_hex(), path, tag)                }                Ref::Symbolic { path, target, object } => {                    writeln!(&mut out, "{} {} symref-target:{}", object.to_hex(), path, target)                }            }?;        }        Ok(())    }}