refactor(tvix/store): drop calculate_nar from PathInfoService r/8103

This shouldn't be part of the PathInfoService trait.

Pretty much none of the PathInfoServices do implement it, and requiring
them to implement it means they also cannot make use of this calculation
already being done by other PathInfoServices.

Move it out into its own NarCalculationService trait, defined somewhere
at tvix_store::nar, and have everyone who wants to trigger nar
calculation use nar_calculation_service directly, which now is an
additional field in TvixStoreIO for example.

It being moved outside the PathInfoService trait doesn't prohibit
specific implementations to implement it (like the GRPC client for the
`PathInfoService` does.

This is currently wired together in a bit of a hacky fashion - as of
now, everything uses the naive implementation that traverses blob and
directoryservice, rather than composing it properly. I want to leave
that up to a later CL, dealing with other parts of store composition
too.

Change-Id: I18d07ea4301d4a07651b8218bc5fe95e4e307208
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11619
Reviewed-by: Connor Brewster <cbrewster@hey.com>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

1 files changed, 9 insertions, 4 deletions

diff --git a/tvix/store/src/pathinfoservice/tests/utils.rs b/tvix/store/src/pathinfoservice/tests/utils.rs
index 31ec57aade73..e47cc9d6c383 100644
--- a/tvix/store/src/pathinfoservice/tests/utils.rs
+++ b/tvix/store/src/pathinfoservice/tests/utils.rs
@@ -3,6 +3,7 @@ use std::sync::Arc;
 use tonic::transport::{Endpoint, Server, Uri};
 
 use crate::{
+    nar::{NarCalculationService, SimpleRenderer},
     pathinfoservice::{GRPCPathInfoService, MemoryPathInfoService, PathInfoService},
     proto::{
         path_info_service_client::PathInfoServiceClient,
@@ -25,13 +26,17 @@ pub async fn make_grpc_path_info_service_client() -> super::BSDSPS {
         let blob_service = blob_service.clone();
         let directory_service = directory_service.clone();
         async move {
-            let path_info_service: Arc<dyn PathInfoService> =
-                Arc::from(MemoryPathInfoService::new(blob_service, directory_service));
+            let path_info_service: Arc<dyn PathInfoService> = Arc::from(
+                MemoryPathInfoService::new(blob_service.clone(), directory_service.clone()),
+            );
+            let nar_calculation_service =
+                Box::new(SimpleRenderer::new(blob_service, directory_service))
+                    as Box<dyn NarCalculationService>;
 
-            // spin up a new DirectoryService
+            // spin up a new PathInfoService
             let mut server = Server::builder();
             let router = server.add_service(PathInfoServiceServer::new(
-                GRPCPathInfoServiceWrapper::new(path_info_service),
+                GRPCPathInfoServiceWrapper::new(path_info_service, nar_calculation_service),
             ));
 
             router