With Go modules, is that possible to reference a package which hasn't gotten a module support

[Roman Gomoliako]

For a project considering switching to Go modules, is that possible to reference a package without support of modules (doesn't have a go.mod/go.sum files)?

module anEnterpriseCompany.com/aProject

require anEnterpriseCompany.com/anotherProject v0.0.0

go 1.12

"anEnterpriseCompany.com/anotherProject" can't be modified to support Go modules for some internal reasons. Is there some ways to resolve this?

Thanks,

Roman

[t hepudds]

Hi Roman,

> For a project considering switching to Go modules, is that possible to 

> reference a package without support of modules (doesn't have a go.mod/go.sum files)?

Yes, as far I understand, that should usually work.

Using your example of wanting to consume a non-module dependency anEnterpriseCompany.com/anotherProject, a module-based consumer should be able to do things like:

  $ go get anEnterpriseCompany.com/anotherProject@<tag>

  $ go get anEnterpriseCompany.com/anotherProject@<hash>

  $ go get anEnterpriseCompany.com/anotherProject@latest

There is a longer discussion in this FAQ on the Modules wiki:

   https://github.com/golang/go/wiki/Modules#can-a-module-consume-a-package-that-has-not-opted-in-to-modules

Hope that helps,

thepudds

[Roman Gomoliako]

thepudds,

Thank you for the reply, thanks for the link!

The follow-up question, what if the project isn't hosted anywhere yet? Like, I have a module-opted package and it tries to use a local module-unaware package. For a local module-aware package usage one would use `replace` declaration. But I found it doesn't work for module-unaware packages. Having the module-unaware anEnterpriseCompany.com/anotherProject only locally I can't ahieve a successfull compilation using `replace`:

module anEnterpriseCompany.com/aProject

require anEnterpriseCompany.com/anotherProject v0.0.0

replace anEnterpriseCompany.com/anotherProject => ../some/where/up/on/a/filesystem/anotherProject

go 1.12

[Tamás Gulácsi]

If it's on your local filesystem, you can easily add a go.mod file to it...