Adaptations for repo migration to hashed storage
In Gitlab 12, repositories can be stored in a hierarchy with directory names that are hashes, but it's not systematic, especially for repositories predating the migration from Heptapod 0.8.
There's a rake task to migrate the repositories to the hashed storage. I don't expect it to work at all for Heptapod 0.12.0rc4. It must work in Heptapod 0.12.0
The hashed storage is the one used by default on GDK based development setups, and Heptapod 0.12.0 RCs work on it with only one problem, the group HGRC issue mentioned in the changelog.