Using subpackages with go mod locally

For another approach, you can have go.mod like this:

module awesome

Then call subpackage like this:

import "awesome/subpackageA"

https://golang.org/doc/code.html

Go has no (real) notion of "subpackage". All packages are basically treated equal. This means that a replace bitbucket.org/me/awesome does not influence package bitbucket.org/me/awesome/subpackageA as these are two individual, unrelated packages. The folder layout does not introduce a relation of subpackageA to awsome, or the other way around *).

So you need to add an individual replace directive for subpackageA

replace bitbucket.org/me/awesome/subpackageA => ./subpackageA

*) Nitpicking for absolute correctness: Folder layout does have influence for folders named internal (cannot be imported from other projects), for folders named vendor (which may contain vendored packages) and searching for a go.mod file stops at the repo root.