Google hosting Go on GitHub. Microsoft hosting .NET on GitHub. It must feel like an accomplishment to be implicitly endorsed by these companies. Considering open source's history, you'd think its primary management tool would be open source as well. I guess it's GitHub's combination of accessible design + performant version control + lack of ads + reliability that made it the premium source for anything open source.…
Now we just need Apple's Objective C / Swift to move to github. :) Sorry, not going to happen. :(
https://github.com/llvm-mirror/clang
Swift hasn't been included but objective c is there.