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mod from_addr;
mod grpc;
mod memory;
mod nix_http;
mod sled;
#[cfg(any(feature = "fuse", feature = "virtiofs"))]
mod fs;
use futures::stream::BoxStream;
use tonic::async_trait;
use tvix_castore::proto as castorepb;
use tvix_castore::Error;
use crate::proto::PathInfo;
pub use self::from_addr::from_addr;
pub use self::grpc::GRPCPathInfoService;
pub use self::memory::MemoryPathInfoService;
pub use self::nix_http::NixHTTPPathInfoService;
pub use self::sled::SledPathInfoService;
#[cfg(any(feature = "fuse", feature = "virtiofs"))]
pub use self::fs::make_fs;
/// The base trait all PathInfo services need to implement.
#[async_trait]
pub trait PathInfoService: Send + Sync {
/// Retrieve a PathInfo message by the output digest.
async fn get(&self, digest: [u8; 20]) -> Result<Option<PathInfo>, Error>;
/// Store a PathInfo message. Implementations MUST call validate and reject
/// invalid messages.
async fn put(&self, path_info: PathInfo) -> Result<PathInfo, Error>;
/// Return the nar size and nar sha256 digest for a given root node.
/// This can be used to calculate NAR-based output paths,
/// and implementations are encouraged to cache it.
async fn calculate_nar(
&self,
root_node: &castorepb::node::Node,
) -> Result<(u64, [u8; 32]), Error>;
/// Iterate over all PathInfo objects in the store.
/// Implementations can decide to disallow listing.
///
/// This returns a pinned, boxed stream. The pinning allows for it to be polled easily,
/// and the box allows different underlying stream implementations to be returned since
/// Rust doesn't support this as a generic in traits yet. This is the same thing that
/// [async_trait] generates, but for streams instead of futures.
fn list(&self) -> BoxStream<'static, Result<PathInfo, Error>>;
}
#[async_trait]
impl<A> PathInfoService for A
where
A: AsRef<dyn PathInfoService> + Send + Sync,
{
async fn get(&self, digest: [u8; 20]) -> Result<Option<PathInfo>, Error> {
self.as_ref().get(digest).await
}
async fn put(&self, path_info: PathInfo) -> Result<PathInfo, Error> {
self.as_ref().put(path_info).await
}
async fn calculate_nar(
&self,
root_node: &castorepb::node::Node,
) -> Result<(u64, [u8; 32]), Error> {
self.as_ref().calculate_nar(root_node).await
}
fn list(&self) -> BoxStream<'static, Result<PathInfo, Error>> {
self.as_ref().list()
}
}
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