async fn receive_into(
        mut uncompressed: impl Stream<Item = std::io::Result<Bytes>> + Unpin,
        dst: impl AsRef<Path>,
    ) -> Result<Subvolume> {
        let tmpdir = tempfile::tempdir_in(metalos_paths::scratch()).map_err(Error::Prepare)?;
        let mut child = Command::new("/sbin/btrfs")
            .arg("receive")
            .arg(tmpdir.path())
            .stdin(Stdio::piped())
            .stderr(Stdio::piped())
            .spawn()
            .map_err(Error::StartReceive)?;
        let mut stdin = BufWriter::new(child.stdin.take().expect("stdin is a pipe"));
        while let Some(chunk) = uncompressed.next().await {
            let chunk = chunk.map_err(Error::GetChunk)?;
            tokio::io::copy(&mut std::io::Cursor::new(chunk), &mut stdin)
                .await
                .map_err(Error::WriteChunk)?;
        }
        stdin.flush().await.map_err(Error::WriteChunk)?;
        drop(stdin);
        let output = child
            .wait_with_output()
            .await
            .context("while waiting for btrfs-receive to exit")
            .map_err(Error::Finish)?;

        let stderr = std::str::from_utf8(&output.stderr)
            .context("decoding btrfs-receive stderr")
            .map_err(Error::Finish)?;

        output
            .status
            .exit_ok()
            .context(stderr.to_string())
            .map_err(Error::Finish)?;

        let at_subvol = stderr.lines().next().ok_or(Error::ParseReceived(None))?;
        let subvol = parse_at_subvol(at_subvol.to_string())?;
        let received_path = tmpdir.path().join(subvol);
        let mut received_subvol = Subvolume::get(&received_path)?;
        let dst = dst.as_ref();
        // the subvol must first be marked as readwrite to move, then marked
        // readonly for obvious reasons
        received_subvol
            .set_readonly(false)
            .map_err(|err| Error::Move {
                received_path: received_path.clone(),
                dst: dst.to_path_buf(),
                err: Box::new(err),
            })?;
        std::fs::rename(&received_path, &dst).map_err(|err| Error::Move {
            received_path: received_path.clone(),
            dst: dst.to_path_buf(),
            err: Box::new(anyhow::Error::from(err).into()),
        })?;
        let mut received_subvol = Subvolume::get(&dst)?;
        received_subvol
            .set_readonly(true)
            .map_err(|err| Error::Move {
                received_path,
                dst: dst.to_path_buf(),
                err: Box::new(err),
            })?;

        Subvolume::get(dst)
    }
/// Common pieces of `btrfs receive`, that dumps an uncompressed sendstream
/// into a `btrfs receive` process. If successfully received, the subvolume
/// will be moved into `dst`, but will intermediately be received to a
/// temporary directory.
Common pieces of `btrfs receive`, that dumps an uncompressed sendstream
into a `btrfs receive` process. If successfully received, the subvolume
will be moved into `dst`, but will intermediately be received to a
temporary directory.
Common pieces of ` btrfs receive ` that dumps an uncompressed sendstream into a ` btrfs receive ` process . If successfully received the subvolume will be moved into ` dst ` but will intermediately be received to a temporary directory .
async fn receive_into(
        mut uncompressed: impl Stream<Item = std::io::Result<Bytes>> + Unpin,
        dst: impl AsRef<Path>,
    ) -> Result<Subvolume> {
        let tmpdir = tempfile::tempdir_in(metalos_paths::scratch()).map_err(Error::Prepare)?;
        let mut child = Command::new("/sbin/btrfs")
            .arg("receive")
            .arg(tmpdir.path())
            .stdin(Stdio::piped())
            .stderr(Stdio::piped())
            .spawn()
            .map_err(Error::StartReceive)?;
        let mut stdin = BufWriter::new(child.stdin.take().expect("stdin is a pipe"));
        while let Some(chunk) = uncompressed.next().await {
            let chunk = chunk.map_err(Error::GetChunk)?;
            tokio::io::copy(&mut std::io::Cursor::new(chunk), &mut stdin)
                .await
                .map_err(Error::WriteChunk)?;
        }
        stdin.flush().await.map_err(Error::WriteChunk)?;
        drop(stdin);
        let output = child
            .wait_with_output()
            .await
            .context("while waiting for btrfs-receive to exit")
            .map_err(Error::Finish)?;
        let stderr = std::str::from_utf8(&output.stderr)
            .context("decoding btrfs-receive stderr")
            .map_err(Error::Finish)?;
        output
            .status
            .exit_ok()
            .context(stderr.to_string())
            .map_err(Error::Finish)?;
        let at_subvol = stderr.lines().next().ok_or(Error::ParseReceived(None))?;
        let subvol = parse_at_subvol(at_subvol.to_string())?;
        let received_path = tmpdir.path().join(subvol);
        let mut received_subvol = Subvolume::get(&received_path)?;
        let dst = dst.as_ref();
        // the subvol must first be marked as readwrite to move, then marked
        // readonly for obvious reasons
        received_subvol
            .set_readonly(false)
            .map_err(|err| Error::Move {
                received_path: received_path.clone(),
                dst: dst.to_path_buf(),
                err: Box::new(err),
            })?;
        std::fs::rename(&received_path, &dst).map_err(|err| Error::Move {
            received_path: received_path.clone(),
            dst: dst.to_path_buf(),
            err: Box::new(anyhow::Error::from(err).into()),
        })?;
        let mut received_subvol = Subvolume::get(&dst)?;
        received_subvol
            .set_readonly(true)
            .map_err(|err| Error::Move {
                received_path,
                dst: dst.to_path_buf(),
                err: Box::new(err),
            })?;
        Subvolume::get(dst)
    }
async fn receive_into ( mut uncompressed : impl Stream < Item = std :: io :: Result < Bytes > > + Unpin , dst : impl AsRef < Path > , ) -> Result < Subvolume > { let tmpdir = tempfile :: tempdir_in ( metalos_paths :: scratch ( ) ) . map_err ( Error :: Prepare ) ? ; let mut child = Command :: new ( " " ) . arg ( " " ) . arg ( tmpdir . path ( ) ) . stdin ( Stdio :: piped ( ) ) . stderr ( Stdio :: piped ( ) ) . spawn ( ) . map_err ( Error :: StartReceive ) ? ; let mut stdin = BufWriter :: new ( child . stdin . take ( ) . expect ( " " ) ) ; while let Some ( chunk ) = uncompressed . next ( ) . await { let chunk = chunk . map_err ( Error :: GetChunk ) ? ; tokio :: io :: copy ( & mut std :: io :: Cursor :: new ( chunk ) , & mut stdin ) . await . map_err ( Error :: WriteChunk ) ? ; } stdin . flush ( ) . await . map_err ( Error :: WriteChunk ) ? ; drop ( stdin ) ; let output = child . wait_with_output ( ) . await . context ( " " ) . map_err ( Error :: Finish ) ? ; let stderr = std :: str :: from_utf8 ( & output . stderr ) . context ( " " ) . map_err ( Error :: Finish ) ? ; output . status . exit_ok ( ) . context ( stderr . to_string ( ) ) . map_err ( Error :: Finish ) ? ; let at_subvol = stderr . lines ( ) . next ( ) . ok_or ( Error :: ParseReceived ( None ) ) ? ; let subvol = parse_at_subvol ( at_subvol . to_string ( ) ) ? ; let received_path = tmpdir . path ( ) . join ( subvol ) ; let mut received_subvol = Subvolume :: get ( & received_path ) ? ; let dst = dst . as_ref ( ) ; // the subvol must first be marked as readwrite to move, then marked // readonly for obvious reasons received_subvol . set_readonly ( false ) . map_err ( | err | Error :: Move { received_path : received_path . clone ( ) , dst : dst . to_path_buf ( ) , err : Box :: new ( err ) , } ) ? ; std :: fs :: rename ( & received_path , & dst ) . map_err ( | err | Error :: Move { received_path : received_path . clone ( ) , dst : dst . to_path_buf ( ) , err : Box :: new ( anyhow :: Error :: from ( err ) . into ( ) ) , } ) ? ; let mut received_subvol = Subvolume :: get ( & dst ) ? ; received_subvol . set_readonly ( true ) . map_err ( | err | Error :: Move { received_path , dst : dst . to_path_buf ( ) , err : Box :: new ( err ) , } ) ? ; Subvolume :: get ( dst ) }
Common pieces of `btrfs receive`, that dumps an uncompressed sendstream
into a `btrfs receive` process.
Common pieces of ` btrfs receive ` that dumps an uncompressed sendstream into a ` btrfs receive ` process .
uncompressed
impl Stream<Item = std::io::Result<Bytes>> + Unpin
dst
impl AsRef<Path>
uncompressed
impl Stream<Item = std::io::Result<Bytes>> + Unpin
dst
impl AsRef<Path>