Issue with lightningcss dependency in Vite 5.0 affecting Serverless deployment - Missing ../pkg about lightningcss HOT 17 OPEN

@devongovett can be related with the files in package.json?

In this code, looks that there are dependencies of other files:

At least:

• pkg/*
• node/*.node

However, I see that these files do not exist in the repo either... Are they generated during the build or how does it work? Thanks

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same issue with turborepo

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same with expo / react-native.

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same issue with Bun.build

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@mercer08 did you find some workaround?

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The problem is that your package manager (eg npm) is not installing the optional dependencies in the package. There is a dependency per os/cpu architecture that should be installed. The error you see here is because we attempt to fall back to a local version if the those packages are not found (for local development).

You'll need to check why your package manager is not working properly. It could be:

1. You have the --no-optional flag enabled, which would prevent installing optional dependencies.
2. You're running on an unsupported platform.
3. A bug in your package manager (eg npm/cli#4828). Try deleting node_modules and your package lock file and installing again.

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Probably is more related with 2. You're running on an unsupported platform.. This happens after build a CLI, and this CLI can be used on any platform to build the files using Bun.build and lightningcss, but lightningcss lib is included in the bundle, and the problems comes after this CLI build.

Running Bun.build with lightningcss in runtime without the CLI it works.

Probably the same is happening to @mercer08 that comments that is happening in the build process.

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What platform are you running on? That means operating system/cpu.

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What platform are you running on? That means operating system/cpu.

• uname -mprs: Darwin 23.4.0 arm64 arm
• Chip: Apple M1 Pro
• Memory: 16 GB
• macOS: 14.4.1 (23E224)

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Then you're definitely on a supported platform. Your package manager isn't working properly. It should be installing lightningcss-darwin-arm64.

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I'm using bun as a package manager, and it install all dependencies, devDependencies, andoptionalDependencies. Without doing the build of my CLI, it works. The problem comes when generating the build that probably does not add the optionalDependencies inside the final code. I'm still investigating and see if this is it, but thanks for your feedback @devongovett.

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I am using Yarn berry with pnp. It does install the optional dependencies appropriately (lightningcss-darwin-arm64 for m1 mac) but I still get the error on the relative ../pkg path line. Is getting the optional dependencies installed enough here in this case. Would you recommend doing something more? @devongovett

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hmm now looking at the code, it seems that is also behind an environment variable check. Is that somehow set on your system?

https://github.com/parcel-bundler/lightningcss/blob/baa1a2b7fa52eeb3827f8edcc2e14de33cd69ad0/node/index.js#L15C5-L15C37

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I have same problem.

I'm not sure if this is a problem with lightningcss. I can reproduce the problem in the following way.

It seems to be caused by the side effects of the vite package.

$ pnpm ls
Legend: production dependency, optional only, dev only

[email protected] F:\...\vite-lightningcss (PRIVATE)

devDependencies:
lightningcss 1.25.0
typescript 5.4.5
vite 5.2.11

$ pnpm -v
9.1.2

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I am seeing this issue using nx and react / vite apps.

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Anyone have a workaround for this yet?

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I had this issue and I found it was caused from importing from lightningcss in a runtime file

I accidentally had this in a file that was running in the browser:

import {transform} from "lightningcss"

When I removed it, it worked

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