Using ScalaPB with gogoproto

[girish...@infectiousmedia.com]

I'm very new to both scala and protocol buffers, so apologies if this is a basic question. 

I'm trying to get scalaPB to compile a .proto file which has gogoproto extensions. sbt compile complains on seeing the import with this error:

##################

<--- snip -->

protoc-jar: protoc version: 320, detected platform: linux/amd64

protoc-jar: executing: [/tmp/protocjar4837658652501545766/bin/protoc.exe, --plugin=protoc-gen-scala=/tmp/protocbridge1314948014394846724, --scala_out=grpc:/home/bsgt/000_git_repos/sfk/target/scala-2.11/src_managed/main, -I/home/bsgt/000_git_repos/sfk/src/main/protobuf, -I/home/bsgt/000_git_repos/sfk/target/protobuf_external, /home/bsgt/000_git_repos/sfk/src/main/protobuf/events.proto]

github.com/gogo/protobuf/gogoproto/gogo.proto: File not found.

events.proto: Import "github.com/gogo/protobuf/gogoproto/gogo.proto" was not found or had errors.

java.lang.RuntimeException: protoc returned exit code: 1

    at scala.sys.package$.error(package.scala:27)

<--- snip -->

##################

What is the best method to get scalaPB to recognise the dependency? Any help would be much appreciated.

[Nadav Samet]

Hi Girish,

The protocol buffer compiler is not able to download files from git, so lines like 'import "github.com/gogo/protobuf/gogoproto/gogo.proto"' would only attempt to find files at the local filesystem.

There are two options:

1. Copy the gogo.proto files into your source repository (for example under src/main/protobuf/gogoproto), then import them using:

  import gogoproto/xyz.proto

2. It's unlikely to be the case for you (since it seems that the protos you reference belong to a go project), but if these protos were distributed inside a jar, the last question at https://scalapb.github.io/faq.html would apply.

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-Nadav

[girish...@infectiousmedia.com]

Thanks v much Nadav! I'll try your suggestions. :)

On Tuesday, 25 April 2017 15:38:16 UTC+1, Nadav Samet wrote:

Hi Girish,

The protocol buffer compiler is not able to download files from git, so lines like 'import "github.com/gogo/protobuf/gogoproto/gogo.proto"' would only attempt to find files at the local filesystem.

There are two options:

1. Copy the gogo.proto files into your source repository (for example under src/main/protobuf/gogoproto), then import them using:

  import gogoproto/xyz.proto

2. It's unlikely to be the case for you (since it seems that the protos you reference belong to a go project), but if these protos were distributed inside a jar, the last question at https://scalapb.github.io/faq.html would apply.

On Tue, Apr 25, 2017 at 7:18 AM, <girish...@infectiousmedia.com> wrote:

I'm very new to both scala and protocol buffers, so apologies if this is a basic question. 

I'm trying to get scalaPB to compile a .proto file which has gogoproto extensions. sbt compile complains on seeing the import with this error:

##################

<--- snip -->

protoc-jar: protoc version: 320, detected platform: linux/amd64

protoc-jar: executing: [/tmp/protocjar4837658652501545766/bin/protoc.exe, --plugin=protoc-gen-scala=/tmp/protocbridge1314948014394846724, --scala_out=grpc:/home/bsgt/000_git_repos/sfk/target/scala-2.11/src_managed/main, -I/home/bsgt/000_git_repos/sfk/src/main/protobuf, -I/home/bsgt/000_git_repos/sfk/target/protobuf_external, /home/bsgt/000_git_repos/sfk/src/main/protobuf/events.proto]

github.com/gogo/protobuf/gogoproto/gogo.proto: File not found.

events.proto: Import "github.com/gogo/protobuf/gogoproto/gogo.proto" was not found or had errors.

java.lang.RuntimeException: protoc returned exit code: 1

    at scala.sys.package$.error(package.scala:27)

<--- snip -->

##################

What is the best method to get scalaPB to recognise the dependency? Any help would be much appreciated.

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-Nadav

[Giri]

First option worked a treat! Nice one!