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leanprover-community / leanprover-community.github.io

Hosts the website for mathlib and other Lean community infrastructure.
https://leanprover-community.github.io/
MIT License
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Add bit about upgrade project.md #478

Closed rwst closed 3 months ago

rwst commented 3 months ago

Please add/change if inaccurate.

fpvandoorn commented 3 months ago

About updating the lean-toolchain file: If the project depends on Mathlib and the old version of lake is able to parse the new lakefiles of all dependencies, then this happens automatically, IIUC. Maybe this should be mentioned, because in most cases nothing has to be done by the user.

rwst commented 3 months ago

@fpvandoorn You mean it's not necessary to lake update, just change lean-toolchain? And maybe lake exe cache get?

I see, there is also e.g. elan toolchain install leanprover/lean4:stable.

fpvandoorn commented 3 months ago

I only was talking about manually updating lean-toolchain.

fpvandoorn commented 3 months ago

I don't think these instructions are very good, users don't have to directly interact with elan themselves. This page assumes your project depends on Mathlib, and then you also always have to update Mathlib, and doing that will automatically install the right version of Lean.

I added my own version of these instructions here: #487

rwst commented 3 months ago

No problem. I don't have much experience with lean. I'm glad that you are taking over, and that there will be good instructions on that page. Closing.

fpvandoorn commented 3 months ago

Thanks for taking the initiative in writing these instructions. They were indeed needed!