From the recent article "Why Google Stores Billions of Lines of
Code in a Single Repository" a very interesting excerpt about
their code ownership [1]:
An important aspect of Google culture that encourages code
quality is the expectation that all code is reviewed before
being committed to the repository. Most developers can view and
propose changes to files anywhere across the entire
codebase—with the exception of a small set of highly
confidential code that is more carefully controlled. The risk
associated with developers changing code they are not deeply
familiar with is mitigated through the code-review process and
the concept of code ownership. The Google codebase is laid out
in a tree structure. Each and every directory has a set of
owners who control whether a change to files in their directory
will be accepted. Owners are typically the developers who work
on the projects in the directories in question. A change often
receives a detailed code review from one developer, evaluating
the quality of the change, and a commit approval from an owner,
evaluating the appropriateness of the change to their area of
the codebase.
How about doing something similar for Phobos?
On a related note Facebook open-sourced it's "mention-bot" [2]
that could be helpful in case no owners are defined.
[1]
http://cacm.acm.org/magazines/2016/7/204032-why-google-stores-billions-of-lines-of-code-in-a-single-repository/fulltext
[2] https://github.com/facebook/mention-bot
