feat(tvix/store/pathinfosvc): add calculate_nar method r/6271

Putting this in the PathInfoService trait makes much more sense, we can
have direct control over where/how to cache the results in the
implementation.

This now requires each PathInfoService to hold pointers to BlobService
and DirectoryService.

Change-Id: I4faae780d43eae4beeb57bd5e190e6d1a5d3314e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8724
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>

2 files changed, 17 insertions, 31 deletions

diff --git a/tvix/store/src/proto/grpc_pathinfoservice_wrapper.rs b/tvix/store/src/proto/grpc_pathinfoservice_wrapper.rs
index c070b883fa..645f4aa605 100644
--- a/tvix/store/src/proto/grpc_pathinfoservice_wrapper.rs
+++ b/tvix/store/src/proto/grpc_pathinfoservice_wrapper.rs
@@ -1,36 +1,24 @@
-use crate::blobservice::BlobService;
-use crate::directoryservice::DirectoryService;
-use crate::nar::{calculate_size_and_sha256, RenderError};
+use crate::nar::RenderError;
 use crate::pathinfoservice::PathInfoService;
 use crate::proto;
 use tonic::{async_trait, Request, Response, Result, Status};
 use tracing::{instrument, warn};
 
-pub struct GRPCPathInfoServiceWrapper<PS: PathInfoService, DS: DirectoryService> {
+pub struct GRPCPathInfoServiceWrapper<PS: PathInfoService> {
     path_info_service: PS,
-    blob_service: Box<dyn BlobService>,
-    directory_service: DS,
 }
 
-impl<PS: PathInfoService, DS: DirectoryService> GRPCPathInfoServiceWrapper<PS, DS> {
-    pub fn new(
-        path_info_service: PS,
-        blob_service: Box<dyn BlobService>,
-        directory_service: DS,
-    ) -> Self {
+impl<PS: PathInfoService> From<PS> for GRPCPathInfoServiceWrapper<PS> {
+    fn from(value: PS) -> Self {
         Self {
-            path_info_service,
-            blob_service,
-            directory_service,
+            path_info_service: value,
         }
     }
 }
 
 #[async_trait]
-impl<
-        PS: PathInfoService + Send + Sync + 'static,
-        DS: DirectoryService + Send + Sync + Clone + 'static,
-    > proto::path_info_service_server::PathInfoService for GRPCPathInfoServiceWrapper<PS, DS>
+impl<PS: PathInfoService + Send + Sync + 'static> proto::path_info_service_server::PathInfoService
+    for GRPCPathInfoServiceWrapper<PS>
 {
     #[instrument(skip(self))]
     async fn get(
@@ -78,12 +66,10 @@ impl<
         match request.into_inner().node {
             None => Err(Status::invalid_argument("no root node sent")),
             Some(root_node) => {
-                let (nar_size, nar_sha256) = calculate_size_and_sha256(
-                    &root_node,
-                    &self.blob_service,
-                    self.directory_service.clone(),
-                )
-                .expect("error during nar calculation"); // TODO: handle error
+                let (nar_size, nar_sha256) = self
+                    .path_info_service
+                    .calculate_nar(&root_node)
+                    .expect("error during nar calculation"); // TODO: handle error
 
                 Ok(Response::new(proto::CalculateNarResponse {
                     nar_size,
diff --git a/tvix/store/src/proto/tests/grpc_pathinfoservice.rs b/tvix/store/src/proto/tests/grpc_pathinfoservice.rs
index dbcdc5ced0..8b7038ccbc 100644
--- a/tvix/store/src/proto/tests/grpc_pathinfoservice.rs
+++ b/tvix/store/src/proto/tests/grpc_pathinfoservice.rs
@@ -5,7 +5,9 @@ use crate::proto::GRPCPathInfoServiceWrapper;
 use crate::proto::PathInfo;
 use crate::proto::{GetPathInfoRequest, Node, SymlinkNode};
 use crate::tests::fixtures::DUMMY_OUTPUT_HASH;
-use crate::tests::utils::{gen_blob_service, gen_directory_service, gen_pathinfo_service};
+use crate::tests::utils::gen_blob_service;
+use crate::tests::utils::gen_directory_service;
+use crate::tests::utils::gen_pathinfo_service;
 use tonic::Request;
 
 /// generates a GRPCPathInfoService out of blob, directory and pathinfo services.
@@ -14,11 +16,9 @@ use tonic::Request;
 /// It uses the NonCachingNARCalculationService NARCalculationService to
 /// calculate NARs.
 fn gen_grpc_service() -> impl GRPCPathInfoService {
-    GRPCPathInfoServiceWrapper::new(
-        gen_pathinfo_service(),
-        gen_blob_service(),
-        gen_directory_service(),
-    )
+    let blob_service = gen_blob_service();
+    let directory_service = gen_directory_service();
+    GRPCPathInfoServiceWrapper::from(gen_pathinfo_service(blob_service, directory_service))
 }
 
 /// Trying to get a non-existent PathInfo should return a not found error.