use crate::client::{ExtendedBufRead, MessageKind, WriteMode};use futures_io::AsyncWrite;use pin_project_lite::pin_project;use std::{    io,    pin::Pin,    task::{Context, Poll},}; pin_project! {    /// A [`Write`][io::Write] implementation optimized for writing packet lines.    /// A type implementing `Write` for packet lines, which when done can be transformed into a `Read` for    /// obtaining the response.    pub struct RequestWriter<'a> {        on_into_read: MessageKind,        #[pin]        writer: git_packetline::Writer<Box<dyn AsyncWrite + Unpin + 'a>>,        reader: Box<dyn ExtendedBufRead + Unpin + 'a>,    }}impl<'a> futures_io::AsyncWrite for RequestWriter<'a> {    fn poll_write(self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8]) -> Poll<io::Result<usize>> {        self.project().writer.poll_write(cx, buf)    }     fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {        self.project().writer.poll_flush(cx)    }     fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {        self.project().writer.poll_close(cx)    }} /// methods with bonds to IOimpl<'a> RequestWriter<'a> {    /// Create a new instance from a `writer` (commonly a socket), a `reader` into which to transform once the    /// writes are finished, along with configuration for the `write_mode` and information about which message to write    /// when this instance is converted into a `reader` to read the request's response.    pub fn new_from_bufread<W: AsyncWrite + Unpin + 'a>(        writer: W,        reader: Box<dyn ExtendedBufRead + Unpin + 'a>,        write_mode: WriteMode,        on_into_read: MessageKind,    ) -> Self {        let mut writer = git_packetline::Writer::new(Box::new(writer) as Box<dyn AsyncWrite + Unpin>);        match write_mode {            WriteMode::Binary => writer.enable_binary_mode(),            WriteMode::OneLfTerminatedLinePerWriteCall => writer.enable_text_mode(),        }        RequestWriter {            on_into_read,            writer,            reader,        }    }     /// Write the given message as packet line.    pub async fn write_message(&mut self, message: MessageKind) -> io::Result<()> {        match message {            MessageKind::Flush => {                git_packetline::PacketLine::Flush                    .write_to(self.writer.inner_mut())                    .await            }            MessageKind::Delimiter => {                git_packetline::PacketLine::Delimiter                    .write_to(self.writer.inner_mut())                    .await            }            MessageKind::ResponseEnd => {                git_packetline::PacketLine::ResponseEnd                    .write_to(self.writer.inner_mut())                    .await            }            MessageKind::Text(t) => {                git_packetline::immutable::Text::from(t)                    .write_to(self.writer.inner_mut())                    .await            }        }        .map(|_| ())    }    /// Discard the ability to write and turn this instance into the reader for obtaining the other side's response.    pub async fn into_read(mut self) -> std::io::Result<Box<dyn ExtendedBufRead + Unpin + 'a>> {        self.write_message(self.on_into_read).await?;        Ok(self.reader)    }}