Keeping master green at scale

Re:Keeping master green at scale by jacobparker on Thursday April 18, 2019 @04:12PM (#19694362)

> You are totally correct that to achieve the same performance, correctness, and overall master level "green"ness in a multirepo system you would have to either define or detect dependencies and dependent repos, build the entire affected chain, and test the result. That part is much easier in monorepo.

You also would need to do that as an atomic operation (in the mono-repo + especially with a commit queue you're building on the atomicity of git).

Having to unwinding that transaction if you aren't atomic can get you into a big mess at larger scales.

Here's a good related talk: C++ as a "Live at Head" language: https://www.youtube.com/watch?v=tISy7EJQPzI by Titus Winters (from Google).

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Re:Keeping master green at scale by underrun on Thursday April 18, 2019 @04:22PM (#19694454)

thanks for the link - looking forward to watching.

Currently, I'm not convinced that you need to track and apply commits across dependencies and dependent systems atomically/transactionally to have a sane build environment even at scale, but you definitely get that part free with monorepo.

Any links to docs or presentations that address that specific issue would be very welcome :-)

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