robertwb commented on a change in pull request #11490:
URL: https://github.com/apache/beam/pull/11490#discussion_r413201320



##########
File path: sdks/go/pkg/beam/runners/universal/runnerlib/stage.go
##########
@@ -17,27 +17,127 @@ package runnerlib
 
 import (
        "context"
+       "io"
+       "os"
        "time"
 
        "github.com/apache/beam/sdks/go/pkg/beam/artifact"
+       "github.com/apache/beam/sdks/go/pkg/beam/core/runtime/graphx"
        "github.com/apache/beam/sdks/go/pkg/beam/internal/errors"
        jobpb "github.com/apache/beam/sdks/go/pkg/beam/model/jobmanagement_v1"
        "github.com/apache/beam/sdks/go/pkg/beam/util/grpcx"
+       "google.golang.org/grpc"
 )
 
 // Stage stages the worker binary and any additional files to the given
 // artifact staging endpoint. It returns the retrieval token if successful.
-func Stage(ctx context.Context, id, endpoint, binary, st string, files 
...artifact.KeyedFile) (retrievalToken string, err error) {
+func Stage(ctx context.Context, id, endpoint, binary, st string) 
(retrievalToken string, err error) {
        ctx = grpcx.WriteWorkerID(ctx, id)
        cc, err := grpcx.Dial(ctx, endpoint, 2*time.Minute)
        if err != nil {
                return "", errors.WithContext(err, "connecting to artifact 
service")
        }
        defer cc.Close()
 
+       err = StageViaPortableApi(ctx, cc, binary, st)
+
+       if err == nil {
+               return "", err
+       } else {

Review comment:
       To me it depends on whether it is "one of two+ options" (in which case 
an explicit else clause is clearer) or "exit early vs. fallback" (in which case 
not having the else is clearer). Removing the else clause for now; hopefully 
soon we'll be able to simply remove the fallback altogether. 




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