[Question] Possible to test out pre-release typescript versions?

[JasonKleban]

It is my understanding (possibly dead wrong) that yarn patches typescript with a tsc-version-specific patch to override typescript's private module resolution strategy. Is that true? Where is the code for these patches??

Most importantly, if there is a pre-release version of typescript that we want to test in a yarn 2 monorepo, are we out of luck? I get "Cannot apply hunk ...." during yarn install if I try to resolve to a new version which I figure is because the patch can't be applied to an unrecognized tsc.

I'd love an answer, and but this is secondarily a request for the above topics to be documented. Thanks!

[arcanis]

It is my understanding (possibly dead wrong) that yarn patches typescript with a tsc-version-specific patch to override typescript's private module resolution strategy. Is that true? Where is the code for these patches??

In the TypeScript repo: microsoft/TypeScript#35206

Most importantly, if there is a pre-release version of typescript that we want to test in a yarn 2 monorepo, are we out of luck? I get "Cannot apply hunk ...." during yarn install if I try to resolve to a new version which I figure is because the patch can't be applied to an unrecognized tsc.

This will be solved starting from our next release, the 3.0 (the fix is already in master and can be tried out with yarn set version 3.0.0-rc.2). Should conflicts happen, you'll just have to switch your install strategy to node-modules until we can update the patch.