copybara

Facebook uses a monorepo, similar to the way Google does it. Dependencies are vendored and checked into the repo. Facebook has released a tool for migrating software between repos, which is much like Google's Copybara: Facebook's fbshipit: https://github.com/facebook/fbshipit Google's copybara: https://github.com/google/copybara With these tools, you can make fairly sophisticated choices about how you do vendoring. You can make the internal version look just like the public version, in terms of commit history. And you can export internal commits to public commits, stripping out confidential information along the way (or integrations with internal systems and tooling).

In somewhat related news, Gerrit has a new frontend and it's awesome! Google has a couple of UX people working on it now and it shows. As a big fan of patch-based code review, I still can't stand GitHub PRs. It's very annoying to stack GitHub PRs, so the default is to create large PRs instead. This is sad, because smaller units of review result in better code! Gerrit solves this (and much more). Example change on Gerrit (click on "Comments"): https://gerrit-review.googlesource.com/c/gerrit/+/303182 Reasons to use Gerrit in spite of the learning curve: - Ability to review commit messages (they're part of the codebase!). - Show diffs between different versions of a change, even across rebases, with inline comments. - Inline comments aren't lost on rebases and will be ported. - Changes can be easily stacked. - Select code snippets for inline