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Compiling to Proto3, need Proto2

See original GitHub issue

I have a proto file for proto 2.6.1. It must compile to proto 2.6.

However, when I do a compile, it looks like the generated Java is for proto3 …

I find this in the generated java

com.google.protobuf.GeneratedMessageV3

I am getting lots of compiler failures, because GeneratedMessageV3 is not found (which makes sense since I am using proto-java 2.6.1.

In my sbt, I have this…

  PB.targets in Compile := Seq(
    PB.gens.java("2.6.1") -> (sourceManaged in Compile).value
  )

In the proto file, I have…

syntax = "proto2";

Is there something I am doing incorrectly?

Issue Analytics

State:
Created 5 years ago
Comments:5 (2 by maintainers)

Top GitHub Comments

1reaction

pauljamesclearycommented, Aug 15, 2018

Thanks! Looks like this works!

FYI, this is the PR I just posted for our repo - https://github.com/vinyldns/vinyldns/pull/113

0reactions

thesametcommented, Aug 15, 2018

Correct, this plugin depends on https://github.com/os72/protoc-jar which ships with many different versions of protoc. Currently 3.5.1 is the default version. Also, you can set PB.runProtoc if you want sbt-protoc to use a locally installed protoc instead.

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