Using the yarn API, how do I determine the resolved version of a package in a workspace?

[dmattia]

I am working on a plugin that can bundle a workspace into something that can be deployed to Lambda or Docker. It's sort of like yarnpkg-builder, but differs in one significant way: it allows specifying dependencies that esbuild should ignore that should be installed via yarn into a node_modules folder. This way, a workspace that uses dependencies that don't play nicely with esbuild, such as winston or sequelize, can be safely bundled separately from the esbuild output.

I have a function here that tries to go through a workspace, examining all recursive child workspaces, to find a mapping of what dependency versions are used: https://gist.github.com/dmattia/152436a804e676c3f77611ee2ef427b9#file-bundle-ts-L70-L108

However, this ends up just giving me a semver range, not the actual resolved version, which I need for the next step, which is writing out a package.json file to install the dependencies with: https://gist.github.com/dmattia/152436a804e676c3f77611ee2ef427b9#file-bundle-ts-L167-L184

Bonus points: If there's a way to tell if a dependency is unplugged or not, that would also be really helpful, as by default I'd want all unplugged deps to end up in the package.json file, and not built through esbuild