Back from a short hiatus, Pascal is joined by Jon to talk about the infrastructure that allows commit to sync between Meta's monorepo and GitHub. While ShipIt has been around for a while, allowing commits from the internal repository to sync out to GitHub, Diff Train is its younger brother to allow the inverse. This makes it possible for open-source-first projects like PyTorch to develop on GitHub and bring changes back into the monorepo without sacrificing security and reliability.

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Links:

Timestamps:

Intro 0:06
Intro Jon 1:49
Open-sourcing an internal project 7:26
Open Source Team @ Meta 10:22
Third-party dependencies 12:07
ShipIt 13:48
Diff Train 29:01
Most excited about 41:07
The GIL 42:29
Outro 44:22

45: Syncing GitHub to Monorepo with Jon