Move travis-ci pipeline to go mod

.travis.yml

@@ -1,7 +1,6 @@
 sudo: false
 language: go
 go:
-  - 1.10.x
   - 1.11.x
   - 1.12.x
   # - tip
@@ -12,10 +11,9 @@ before_install:
 install:
   - export CGO_ENABLED="0"
   - go env
-  - go get -u ./weed/...
 
 script:
-  - go test ./weed/...
+  - env GO111MODULE=on go test ./weed/...
 
 before_deploy:
   - make release

weed/s3api/filer_multipart.go

@@ -23,7 +23,7 @@ type InitiateMultipartUploadResult struct {
 }
 
 func (s3a *S3ApiServer) createMultipartUpload(ctx context.Context, input *s3.CreateMultipartUploadInput) (output *InitiateMultipartUploadResult, code ErrorCode) {
-	uploadId, _ := uuid.NewV4()
+	uploadId := uuid.NewV4()
 	uploadIdString := uploadId.String()
 
 	if err := s3a.mkdir(ctx, s3a.genUploadsFolder(*input.Bucket), uploadIdString, func(entry *filer_pb.Entry) {