go: module source tree too large

[aivajoe]

When importing some FHIR packages, go mod tidy dies and refuses to proceed due to a size issue. Has anyone managed to get this to work?

go: finding module for package github.com/google/fhir/proto/google/fhir/proto/r4/core/codes_go_proto
go: finding module for package github.com/google/fhir/proto/google/fhir/proto/r4/core/resources/bundle_and_contained_resource_go_proto
        github.com/google/fhir/proto/google/fhir/proto/r4/core/codes_go_proto: create zip: module source tree too large (max size is 524288000 bytes)
        github.com/google/fhir/proto/google/fhir/proto/r4/core/resources/bundle_and_contained_resource_go_proto: create zip: module source tree too large (max size is 524288000 bytes)

[aivajoe]

As it turns out, my protoc "M" lines were incorrect (rewriting the import paths for golang packages). I had them pointing at github.com/google/fhir instead of github.com/google/fhir/go, so it was trying to download the entire repo. :)