Hello,
I'm using protobuf with GROC in Golang. I followed the instructions on the
GRPC quick start for Go here https://grpc.io/docs/quickstart/go/. Following
are the steps I took to install the needed software and tools.
1. Installed the protoc compiler using the pre-compiled binaries available
here - https://github.com/protocolbuffers/protobuf/releases . Chose
protobuf-3.9.0-linux-arch_64.zip package as per the instructions on the
link above.
2. Installed the protoc plugin for Go using the command go get -u
github.com/golang/protobuf/protoc-gen-go
protoc version is libprotoc 3.9.0 as checked after completing the above
steps.
I proceeded with creating a simple .proto file with the following content.
---------------------------------------------------------------------
syntax = "proto3";
package api;
service HiService{
rpc SayHi (HiRequest) returns (HiResponse);
}
message HiRequest{
string hi = 1;
}
message HiResponse{
string hireply = 1;
}
--------------------------------------------------------------------
To generate the corresponding .pb.go file I used the command -> protoc
--go_out=. file.proto. The .pb.go file has a compile time assertion in it
(pasted below) that checks for proto package version and says that if the
compilation fails at this particular line, proto package needs to be
updated.
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
The .proto and .pb.go files were compiled together with another project and
the compilation failed pointing out exactly the very same compile time
assertion line in the code.
I do not understand how there is a mismatch in the package versions in the
first place? and how do I make them consistent?
Regards,
Niket
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