[yarn pnp] Dep optimizer does not work with virtual path (peer-dependencies)

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Describe the bug

When using peer dependencies Yarn is creating virtual paths, when vite optimize deps it keeps the file structure: Now yarn here is modifying the behaviour of native existsSync and return false despite the folder exists in the cache. This condition fails and does not preprend the FS_PREFIX to the path resulting in a 404 https://github.com/vitejs/vite/blob/2950c3c278e20174184e44c194393b098c0d4305/packages/vite/src/node/plugins/importAnalysis.ts#L184

Sorry for submitting another issue related to yarn2, I understand that moving forward you don’t want to invest more energy in supporting it. We are considering other solutions

Maybe @merceyz or @arcanis can chime in here ?

Reproduction

https://github.com/AlexandreBonaventure/vite-yarn-optimize-virtual

System Info

• vite version: 2.0.0-beta.50
• Operating System: Mac OS
• Node version: 14
• Package manager (npm/yarn/pnpm) and version: yarn 2

[yyx990803]

The PR does help because esbuild’s output path behavior has been a source of bugs. I think I can refactor it to generate the file structure that I want with the technique used in your PR…

[AlexandreBonaventure]

yes preparing a PR