BuckleScript vendors OCaml sourcetree and Ninja using git subtree
https://www.atlassian.com/blog/git/alternatives-to-git-submodule-git-subtree
rollup is vendored only for testing at this time.
Suppose you add ocaml as remote
git remote add ocaml https://github.com/bucklescript/ocaml/
Add it:
git subtree add --prefix vendor/ocaml ocaml master
git subtree pull --prefix vendor/ocaml ocaml master
Push changes:
git subtree push --prefix vendor/ocaml ocaml master