Investigate upgrading monorepo to Yarn 4

[vanessayuenn]

Tasks

Beta Give feedback

1. Does yarn pnp still work? We are using @yarnpkg/fslib to support pnp

Pnp Support

As of https://github.com/yarnpkg/berry/blob/master/CHANGELOG.md#api-changes, there are changes regarding the pnp API. In the past, we already tried out the release candidate v4.x of @yarnpkg/libzip, which dropped Node v.16 support. This was the reason to roll back to v3. We should verify whether our implementation of pnp support still works with yarn v4.

[JReinhold]

I've tested mealdrop with Yarn PnP both in v3 and v4, and they seem to behave identical, with the same errors.

Both cases errors with package dependencies missing so I had to manually add them and then it "worked".

So this is still not perfect but it seems like nothing has changed between v3 and v4.

• Migrating Yarn v3 to PnP: JReinhold/mealdrop@66280e7
• Migrating Yarn v4 to PnP: JReinhold/mealdrop@3933178