How to access nested modules (submodules) in Go?

Question

Go version: 1.12.9

Here is the structure of a simple demo project:

So we have a module domain, which contains two modules: activity and person.

I would like to use domain with all nested modules in the main file => modules.go.

I know how to import domain in the main go.mod:

module modules

go 1.12

replace modules/domain v0.0.0 => ./domain

require modules/domain v0.0.0

So after that can use code from domain/domain.go, but I cannot access code from activity and person modules.

Yes, I could manually import nested modules, for example:
(main go.mod):

module modules

go 1.12

replace modules/domain v0.0.0 => ./domain

replace modules/domain/activity v0.0.0 => ./domain/activity

require (
    modules/domain v0.0.0
    modules/domain/activity v0.0.0
)

but I don't want to manually import all submodules.

How to configure modules to import domain with all submodules?

Answer 1

go 1.18 has the support for the new multi-workspace feature by go.work files. for more info, check golang workspace proposal