[found the answer] I’d like to do some testing on a bunch of different ocaml versions, and for this I need to create a bunch of switches for different ocaml versions. Is there a way I can create them all in parallel ? There’s a lock that gets held during switch creation, but maybe there’s a way t…

For your specific need, you can first create sequentially all needed empty switches, then parallelise their needed packages. For switch creation, a lock is taken on global state, while for install or invariant setting, only a switch lock is taken. For example switches="4.08.0 4.09.0 4.10.0 4.11.0"…

Yep, I did that, once I figured out that I needed to do more than just set the environment variable (that’s what the inopam script taught me). Then I hit what appears to be a global lock in opam during population of switches (I opened an issue on github for it). But yep, this is the key thing: cre…

Create opam switches in parallel

Ecosystem

Chet_Murthy October 26, 2022, 5:46am 2

Ah, this was the answer: Newbie tip: using multiple projects/switches from command line and emacs

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Create opam switches in parallel

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