Send back execution metadata with messages

elan/BUILD

@@ -14,5 +14,5 @@ go_binary(
 sh_cmd(
     name = "run_local",
     srcs = [":elan"],
-    cmd = f"mkdir -p plz-out/elan && exec $(out_location :elan) --host {CONFIG.LOCAL_HOST} --port 7777 -s file://\\\\$PWD/plz-out/elan --log_file plz-out/log/elan.log --admin_host 127.0.0.1 --admin_port 9992 --token_file grpcutil/token.txt --known_blob_cache_size 20M",
+    cmd = f"mkdir -p plz-out/elan && TMPDIR='plz-out/elan' exec $(out_location :elan) --host {CONFIG.LOCAL_HOST} --port 7777 -s file://\\\\$PWD/plz-out/elan --log_file plz-out/log/elan.log --admin_host 127.0.0.1 --admin_port 9992 --token_file grpcutil/token.txt --known_blob_cache_size 20M",
 )

mettle/api/api.go

@@ -310,7 +310,7 @@ func (s *server) Execute(req *pb.ExecuteRequest, stream pb.Execution_ExecuteServ
 	// If we're allowed to check the cache, see if this one has already been done.
 	// A well-behaved client will likely have done this itself but we should make sure again.
 	if !req.SkipCacheLookup {
-		if err := stream.Send(common.BuildOperation(pb.ExecutionStage_CACHE_CHECK, req.ActionDigest, nil)); err != nil {
+		if err := stream.Send(common.BuildOperation(pb.ExecutionStage_CACHE_CHECK, req.ActionDigest, nil, nil)); err != nil {
 			log.Warningf("Failed to forward to stream: %s", err)
 		}
 		if ar, err := s.client.CheckActionCache(context.Background(), req.ActionDigest); err != nil {
@@ -320,7 +320,7 @@ func (s *server) Execute(req *pb.ExecuteRequest, stream pb.Execution_ExecuteServ
 				Result:       ar,
 				CachedResult: true,
 				Status:       &rpcstatus.Status{Code: int32(codes.OK)},
-			}))
+			}, nil))
 		}
 	}
 
@@ -331,7 +331,7 @@ func (s *server) Execute(req *pb.ExecuteRequest, stream pb.Execution_ExecuteServ
 	}
 	// Dispatch a pre-emptive response message to let our colleagues know we've queued it.
 	// We will also receive & forward this message.
-	b := common.MarshalOperation(pb.ExecutionStage_QUEUED, req.ActionDigest, nil)
+	b := common.MarshalOperation(pb.ExecutionStage_QUEUED, req.ActionDigest, nil, nil)
 	ctx, cancel := context.WithTimeout(context.Background(), timeout)
 	defer cancel()
 	preResponseStartTime := time.Now()

mettle/common/common.go

@@ -173,10 +173,11 @@ func CheckPath(path string) error {
 }
 
 // BuildOperation constructs a longrunning.Operation proto for a task. response may be nil.
-func BuildOperation(stage pb.ExecutionStage_Value, actionDigest *pb.Digest, response *pb.ExecuteResponse) *longrunning.Operation {
+func BuildOperation(stage pb.ExecutionStage_Value, actionDigest *pb.Digest, response *pb.ExecuteResponse, metadata *pb.ExecutedActionMetadata) *longrunning.Operation {
 	any, _ := ptypes.MarshalAny(&pb.ExecuteOperationMetadata{
-		Stage:        stage,
-		ActionDigest: actionDigest,
+		Stage:                    stage,
+		ActionDigest:             actionDigest,
+		PartialExecutionMetadata: metadata,
 	})
 	op := &longrunning.Operation{
 		Name:     actionDigest.Hash,
@@ -191,7 +192,7 @@ func BuildOperation(stage pb.ExecutionStage_Value, actionDigest *pb.Digest, resp
 }
 
 // MarshalOperation is like BuildOperation but gives you back the serialised proto.
-func MarshalOperation(stage pb.ExecutionStage_Value, actionDigest *pb.Digest, response *pb.ExecuteResponse) []byte {
-	b, _ := proto.Marshal(BuildOperation(stage, actionDigest, response))
+func MarshalOperation(stage pb.ExecutionStage_Value, actionDigest *pb.Digest, response *pb.ExecuteResponse, metadata *pb.ExecutedActionMetadata) []byte {
+	b, _ := proto.Marshal(BuildOperation(stage, actionDigest, response, metadata))
 	return b
 }

mettle/worker/worker.go

@@ -1065,7 +1065,7 @@ func (w *worker) collectOutputs(ar *pb.ActionResult, cmd *pb.Command) error {
 // update sends an update on the response channel
 func (w *worker) update(stage pb.ExecutionStage_Value, response *pb.ExecuteResponse) error {
 	w.Report(true, stage == pb.ExecutionStage_EXECUTING, true, stage.String())
-	body := common.MarshalOperation(stage, w.actionDigest, response)
+	body := common.MarshalOperation(stage, w.actionDigest, response, w.metadata)
 	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
 	defer cancel()
 	return common.PublishWithOrderingKey(ctx, w.responses, body, w.actionDigest.Hash, w.name)