How to make Go search for imports beyond GOROOT

Question

I'm migrating dep project into go modules, and some Go files in this project import proto files, but when I execute go mod tidy , it says that cannot find the package where proto files are. Project's structure:

version_service
   proto
     authentication
       authentication.proto
     version
       version.proto
 repository.go

I'm importing like this in repository.go

pb "proto/version"

And i have this:

proto/version: package proto/version is not in GOROOT 

How import this files?

Answer 1

GOROOT is meant to "store" Go native packages, so you shouldn't use it for your own packages, instead, you need to use Go Modules .

You can interpret Go Modules almost like a native package manager for your Go projects, for example, in your project with the following structure:

version_service
  proto
   authentication
     authentication.proto
   version
     version.proto
  repository.go

In you shell you can start the Go Modules with go mod init package.name , in your case package.name could be proto , so using your project root as reference you could import packages using proto/version

package authentication

import (
   pb "proto/version"
)

func main() {
    pb.Foo().Bar()

}