File undefined not found error when loading tsconfig extends file [Yarn 2]

[basal-luke]

File undefined not found error when loading tsconfig extends file [Yarn 2]

[basal-luke]

Related: #176

[bskinner]

I ran into this same issue and did some digging into tsc-alias. From my understanding, it appears the resolveTsConfigExtendsPath in src/helpers/config.ts expects a node_modules folder to exist somewhere in the directory hierarchy when resolving the extends field (via the mylas package). When using Yarn versions >= 2, Yarn uses it's PnP API by default for resolving modules, and does not create a node_modules directory. I have not verified that this is the only location which may need changes.

Changing the value of the nodeLinker key to node-modules in my .yarnrc.yml and rerunning yarn to reinstall the dependencies fixed the issue (but does reintroduce the node_modules folder, which may be undesirable in some setups).