feat(tvix/store/pathinfosvc): provide listing r/6555

This provides an additional method in the PathInfoService trait, as
well as an RPC method on the gRPC layer to list all PathInfo objects in
a PathInfoService.

Change-Id: I7378f6bbd334bd6ac4e9be92505bd099a1c2b19a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9216
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

3 files changed, 175 insertions, 37 deletions

diff --git a/tvix/store/protos/rpc_pathinfo.pb.go b/tvix/store/protos/rpc_pathinfo.pb.go
index bc4da2a127f9..293cb5a7c321 100644
--- a/tvix/store/protos/rpc_pathinfo.pb.go
+++ b/tvix/store/protos/rpc_pathinfo.pb.go
@@ -96,6 +96,46 @@ type GetPathInfoRequest_ByOutputHash struct {
 
 func (*GetPathInfoRequest_ByOutputHash) isGetPathInfoRequest_ByWhat() {}
 
+// The parameters that can be used to lookup (multiple) PathInfo objects.
+// Currently no filtering is possible, all objects are returned.
+type ListPathInfoRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *ListPathInfoRequest) Reset() {
+	*x = ListPathInfoRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_tvix_store_protos_rpc_pathinfo_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListPathInfoRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListPathInfoRequest) ProtoMessage() {}
+
+func (x *ListPathInfoRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_tvix_store_protos_rpc_pathinfo_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListPathInfoRequest.ProtoReflect.Descriptor instead.
+func (*ListPathInfoRequest) Descriptor() ([]byte, []int) {
+	return file_tvix_store_protos_rpc_pathinfo_proto_rawDescGZIP(), []int{1}
+}
+
 // CalculateNARResponse is the response returned by the CalculateNAR request.
 //
 // It contains the size of the NAR representation (in bytes), and the sha56
@@ -114,7 +154,7 @@ type CalculateNARResponse struct {
 func (x *CalculateNARResponse) Reset() {
 	*x = CalculateNARResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_tvix_store_protos_rpc_pathinfo_proto_msgTypes[1]
+		mi := &file_tvix_store_protos_rpc_pathinfo_proto_msgTypes[2]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -127,7 +167,7 @@ func (x *CalculateNARResponse) String() string {
 func (*CalculateNARResponse) ProtoMessage() {}
 
 func (x *CalculateNARResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_tvix_store_protos_rpc_pathinfo_proto_msgTypes[1]
+	mi := &file_tvix_store_protos_rpc_pathinfo_proto_msgTypes[2]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -140,7 +180,7 @@ func (x *CalculateNARResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CalculateNARResponse.ProtoReflect.Descriptor instead.
 func (*CalculateNARResponse) Descriptor() ([]byte, []int) {
-	return file_tvix_store_protos_rpc_pathinfo_proto_rawDescGZIP(), []int{1}
+	return file_tvix_store_protos_rpc_pathinfo_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *CalculateNARResponse) GetNarSize() uint64 {
@@ -170,28 +210,34 @@ var file_tvix_store_protos_rpc_pathinfo_proto_rawDesc = []byte{
 	0x0e, 0x62, 0x79, 0x5f, 0x6f, 0x75, 0x74, 0x70, 0x75, 0x74, 0x5f, 0x68, 0x61, 0x73, 0x68, 0x18,
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 }
 
 var (
@@ -206,22 +252,25 @@ func file_tvix_store_protos_rpc_pathinfo_proto_rawDescGZIP() []byte {
 	return file_tvix_store_protos_rpc_pathinfo_proto_rawDescData
 }
 
-var file_tvix_store_protos_rpc_pathinfo_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_tvix_store_protos_rpc_pathinfo_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
 var file_tvix_store_protos_rpc_pathinfo_proto_goTypes = []interface{}{
 	(*GetPathInfoRequest)(nil),   // 0: tvix.store.v1.GetPathInfoRequest
-	(*CalculateNARResponse)(nil), // 1: tvix.store.v1.CalculateNARResponse
-	(*PathInfo)(nil),             // 2: tvix.store.v1.PathInfo
-	(*Node)(nil),                 // 3: tvix.store.v1.Node
+	(*ListPathInfoRequest)(nil),  // 1: tvix.store.v1.ListPathInfoRequest
+	(*CalculateNARResponse)(nil), // 2: tvix.store.v1.CalculateNARResponse
+	(*PathInfo)(nil),             // 3: tvix.store.v1.PathInfo
+	(*Node)(nil),                 // 4: tvix.store.v1.Node
 }
 var file_tvix_store_protos_rpc_pathinfo_proto_depIdxs = []int32{
 	0, // 0: tvix.store.v1.PathInfoService.Get:input_type -> tvix.store.v1.GetPathInfoRequest
-	2, // 1: tvix.store.v1.PathInfoService.Put:input_type -> tvix.store.v1.PathInfo
-	3, // 2: tvix.store.v1.PathInfoService.CalculateNAR:input_type -> tvix.store.v1.Node
-	2, // 3: tvix.store.v1.PathInfoService.Get:output_type -> tvix.store.v1.PathInfo
-	2, // 4: tvix.store.v1.PathInfoService.Put:output_type -> tvix.store.v1.PathInfo
-	1, // 5: tvix.store.v1.PathInfoService.CalculateNAR:output_type -> tvix.store.v1.CalculateNARResponse
-	3, // [3:6] is the sub-list for method output_type
-	0, // [0:3] is the sub-list for method input_type
+	3, // 1: tvix.store.v1.PathInfoService.Put:input_type -> tvix.store.v1.PathInfo
+	4, // 2: tvix.store.v1.PathInfoService.CalculateNAR:input_type -> tvix.store.v1.Node
+	1, // 3: tvix.store.v1.PathInfoService.List:input_type -> tvix.store.v1.ListPathInfoRequest
+	3, // 4: tvix.store.v1.PathInfoService.Get:output_type -> tvix.store.v1.PathInfo
+	3, // 5: tvix.store.v1.PathInfoService.Put:output_type -> tvix.store.v1.PathInfo
+	2, // 6: tvix.store.v1.PathInfoService.CalculateNAR:output_type -> tvix.store.v1.CalculateNARResponse
+	3, // 7: tvix.store.v1.PathInfoService.List:output_type -> tvix.store.v1.PathInfo
+	4, // [4:8] is the sub-list for method output_type
+	0, // [0:4] is the sub-list for method input_type
 	0, // [0:0] is the sub-list for extension type_name
 	0, // [0:0] is the sub-list for extension extendee
 	0, // [0:0] is the sub-list for field type_name
@@ -247,6 +296,18 @@ func file_tvix_store_protos_rpc_pathinfo_proto_init() {
 			}
 		}
 		file_tvix_store_protos_rpc_pathinfo_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListPathInfoRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_tvix_store_protos_rpc_pathinfo_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*CalculateNARResponse); i {
 			case 0:
 				return &v.state
@@ -268,7 +329,7 @@ func file_tvix_store_protos_rpc_pathinfo_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_tvix_store_protos_rpc_pathinfo_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   2,
+			NumMessages:   3,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/tvix/store/protos/rpc_pathinfo.proto b/tvix/store/protos/rpc_pathinfo.proto
index fecf682d168d..e1d6cd774144 100644
--- a/tvix/store/protos/rpc_pathinfo.proto
+++ b/tvix/store/protos/rpc_pathinfo.proto
@@ -41,6 +41,10 @@ service PathInfoService {
     // It can also be used to calculate arbitrary NAR hashes of output paths,
     // in case a legacy Nix Binary Cache frontend is provided.
     rpc CalculateNAR(Node) returns (CalculateNARResponse);
+
+    // Return a stream of PathInfo messages matching the criteria specified in
+    // ListPathInfoRequest.
+    rpc List(ListPathInfoRequest) returns (stream PathInfo);
 }
 
 // The parameters that can be used to lookup a (single) PathInfo object.
@@ -55,6 +59,10 @@ message GetPathInfoRequest {
     };
 }
 
+// The parameters that can be used to lookup (multiple) PathInfo objects.
+// Currently no filtering is possible, all objects are returned.
+message ListPathInfoRequest { }
+
 // CalculateNARResponse is the response returned by the CalculateNAR request.
 //
 // It contains the size of the NAR representation (in bytes), and the sha56
diff --git a/tvix/store/protos/rpc_pathinfo_grpc.pb.go b/tvix/store/protos/rpc_pathinfo_grpc.pb.go
index bf83a9b7d98b..d7b6711c0310 100644
--- a/tvix/store/protos/rpc_pathinfo_grpc.pb.go
+++ b/tvix/store/protos/rpc_pathinfo_grpc.pb.go
@@ -25,6 +25,7 @@ const (
 	PathInfoService_Get_FullMethodName          = "/tvix.store.v1.PathInfoService/Get"
 	PathInfoService_Put_FullMethodName          = "/tvix.store.v1.PathInfoService/Put"
 	PathInfoService_CalculateNAR_FullMethodName = "/tvix.store.v1.PathInfoService/CalculateNAR"
+	PathInfoService_List_FullMethodName         = "/tvix.store.v1.PathInfoService/List"
 )
 
 // PathInfoServiceClient is the client API for PathInfoService service.
@@ -60,6 +61,9 @@ type PathInfoServiceClient interface {
 	// It can also be used to calculate arbitrary NAR hashes of output paths,
 	// in case a legacy Nix Binary Cache frontend is provided.
 	CalculateNAR(ctx context.Context, in *Node, opts ...grpc.CallOption) (*CalculateNARResponse, error)
+	// Return a stream of PathInfo messages matching the criteria specified in
+	// ListPathInfoRequest.
+	List(ctx context.Context, in *ListPathInfoRequest, opts ...grpc.CallOption) (PathInfoService_ListClient, error)
 }
 
 type pathInfoServiceClient struct {
@@ -97,6 +101,38 @@ func (c *pathInfoServiceClient) CalculateNAR(ctx context.Context, in *Node, opts
 	return out, nil
 }
 
+func (c *pathInfoServiceClient) List(ctx context.Context, in *ListPathInfoRequest, opts ...grpc.CallOption) (PathInfoService_ListClient, error) {
+	stream, err := c.cc.NewStream(ctx, &PathInfoService_ServiceDesc.Streams[0], PathInfoService_List_FullMethodName, opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &pathInfoServiceListClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type PathInfoService_ListClient interface {
+	Recv() (*PathInfo, error)
+	grpc.ClientStream
+}
+
+type pathInfoServiceListClient struct {
+	grpc.ClientStream
+}
+
+func (x *pathInfoServiceListClient) Recv() (*PathInfo, error) {
+	m := new(PathInfo)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
 // PathInfoServiceServer is the server API for PathInfoService service.
 // All implementations must embed UnimplementedPathInfoServiceServer
 // for forward compatibility
@@ -130,6 +166,9 @@ type PathInfoServiceServer interface {
 	// It can also be used to calculate arbitrary NAR hashes of output paths,
 	// in case a legacy Nix Binary Cache frontend is provided.
 	CalculateNAR(context.Context, *Node) (*CalculateNARResponse, error)
+	// Return a stream of PathInfo messages matching the criteria specified in
+	// ListPathInfoRequest.
+	List(*ListPathInfoRequest, PathInfoService_ListServer) error
 	mustEmbedUnimplementedPathInfoServiceServer()
 }
 
@@ -146,6 +185,9 @@ func (UnimplementedPathInfoServiceServer) Put(context.Context, *PathInfo) (*Path
 func (UnimplementedPathInfoServiceServer) CalculateNAR(context.Context, *Node) (*CalculateNARResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method CalculateNAR not implemented")
 }
+func (UnimplementedPathInfoServiceServer) List(*ListPathInfoRequest, PathInfoService_ListServer) error {
+	return status.Errorf(codes.Unimplemented, "method List not implemented")
+}
 func (UnimplementedPathInfoServiceServer) mustEmbedUnimplementedPathInfoServiceServer() {}
 
 // UnsafePathInfoServiceServer may be embedded to opt out of forward compatibility for this service.
@@ -213,6 +255,27 @@ func _PathInfoService_CalculateNAR_Handler(srv interface{}, ctx context.Context,
 	return interceptor(ctx, in, info, handler)
 }
 
+func _PathInfoService_List_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(ListPathInfoRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(PathInfoServiceServer).List(m, &pathInfoServiceListServer{stream})
+}
+
+type PathInfoService_ListServer interface {
+	Send(*PathInfo) error
+	grpc.ServerStream
+}
+
+type pathInfoServiceListServer struct {
+	grpc.ServerStream
+}
+
+func (x *pathInfoServiceListServer) Send(m *PathInfo) error {
+	return x.ServerStream.SendMsg(m)
+}
+
 // PathInfoService_ServiceDesc is the grpc.ServiceDesc for PathInfoService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -233,6 +296,12 @@ var PathInfoService_ServiceDesc = grpc.ServiceDesc{
 			Handler:    _PathInfoService_CalculateNAR_Handler,
 		},
 	},
-	Streams:  []grpc.StreamDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "List",
+			Handler:       _PathInfoService_List_Handler,
+			ServerStreams: true,
+		},
+	},
 	Metadata: "tvix/store/protos/rpc_pathinfo.proto",
 }