feat(tvix): different service types in one composition r/8372

This will be necessary for the PathInfoService composition, as some
PathInfoService implementations require a BlobService & DirectoryService
to ingest into.

Using the Extend trait for creating compositions allows extending the same
composition with configs of various types e.g. BlobStore, DirectoryStore
Generics are moved from the Composition struct to the functions.The storage of
the InstantiatonStates uses the TypeId in the key and a Box<dyn Any> in the
value, which is downcasted to InstantiatonState<T>.

Change-Id: I2af11f26c535029adfb1c62905e0e7c4aaed7b51
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11980
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
Autosubmit: yuka <yuka@yuka.dev>

1 files changed, 1 insertions, 1 deletions

diff --git a/tvix/castore/src/blobservice/memory.rs b/tvix/castore/src/blobservice/memory.rs
index 83b37edb1c89..3d733f950470 100644
--- a/tvix/castore/src/blobservice/memory.rs
+++ b/tvix/castore/src/blobservice/memory.rs
@@ -59,7 +59,7 @@ impl ServiceBuilder for MemoryBlobServiceConfig {
     async fn build<'a>(
         &'a self,
         _instance_name: &str,
-        _context: &CompositionContext<dyn BlobService>,
+        _context: &CompositionContext,
     ) -> Result<Arc<dyn BlobService>, Box<dyn std::error::Error + Send + Sync + 'static>> {
         Ok(Arc::new(MemoryBlobService::default()))
     }