[est31]

There aren't good monorepo solutions out there (yet). Git LFS is great for few large files, but it doesn't help with tons of smaller files. Git submodules are crap when it comes to usability, and have been for a long time, it's even mentioned in the famous Torvalds Git Talk.

Git had a sparse checkouts feature since a long time, but it only affected the checkout itself, all the blobs would still be synced.

Now, Git is gaining good monorepo capabilities with the git partial clone feature [1]. Their idea is that with them you can only clone the parts of a repository that are interesting to you. This has been brewing for a while already but I'm not sure how ready it is. There doesn't seem to be user-level documentation for it yet, to my knowledge, so I am linking to the technical docs.

[1]: https://github.com/git/git/blob/master/Documentation/technic...

[dangoor]

From earlier discussions around monorepos, I saw references that Google, Facebook, and other large monorepo orgs have been making use of Mercurial.

[est31]

Yes, Facebook is mercurial based to my knowledge. Google is using its custom solution called piper I think: https://cacm.acm.org/magazines/2016/7/204032-why-google-stor...

[itsdrewmiller]

https://vfsforgit.org/ is another option here - MS-originated and Github is adopting it - https://venturebeat.com/2017/11/15/github-adopts-microsofts-...