I've encountered another problem with Golang.

11:11:48.11 [ERROR] 1 Exception encountered:

Engine traceback:
in `export-codegen` goal

ProcessExecutionFailure: Process 'Build Go gRPC protobuf plugin for `protoc`.' failed with exit code 1.
stdout:

stderr:
go: <http://google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.2.0|google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.2.0>: loading deprecation for <http://google.golang.org/grpc/cmd/protoc-gen-go-grpc|google.golang.org/grpc/cmd/protoc-gen-go-grpc>: module lookup disabled by GOPROXY=off



Use `--keep-sandboxes=on_failure` to preserve the process chroot for inspection.

I've created a small reproduction repo here: https://github.com/rdeknijf/pants-repro-protoc So,

export-codegen

doesn't work. Also, the docs describe that Pants auto-regenerates any protobuf output. But doesn't. If you remove the

pkg/person.pb.go

file, and run

pants test ::

tests fail. If you run

protoc --go_out=. --go_opt=paths=source_relative person.proto

(in pkg), tests are good again. I'm encountering this on multiple machines (Linux and Mac). Anyone any ideas?