SvelteKit build crash

[sproott]

Bug Report

Current Behavior

When making a production build of a SvelteKit app that uses Quirrel, it crashes with the following error:

Input Code

This is an empty SvelteKit app with one job queue added, which is enough to make the build crash: https://github.com/sproott/quirrel-sveltekit-build-bug

Expected behavior/code

The app should build successfully.

Environment

• Quirrel version: 1.13.1
• Node/npm version: Node 16.18.0, npm 8.19.2

[Skn0tt]

Hi @sproott, thanks for providing the reproduction repo! Much appreciated :)

Interestingly, when I change the import in routes/job/+server.ts from quirrel/sveltekit to quirrel/sveltekit.cjs, it works just fine.

This seems like a ESM-related bug. If you look at https://www.npmjs.com/package/quirrel?activeTab=explore, you can see how this works: quirrel/sveltekit.mjs links to dist/esm/src/sveltekit.js, and that contains export function Queue. From what i'm seeing, the Quirrel side of things works fine. Could you check with SvelteKit if there's similar errors for other projects? I could imagine this to be a bug in the SvelteKit compiler.

[sproott]

@Skn0tt would this be a satisfactory solution?

[Skn0tt]

I tried out adding "type": "module" to the nearest package.json, but that didn't solve the problem for me 🤔

The whole ESM / CJS thing I don't have a lot of knowledge about. Did you find a workaround for this? I'm really at a loss ...

[sproott]

I'll try to come up with something. How do you test libraries locally? Do you somehow get a project to use a local version? Or do you modify it in node_modules directly somehow?

[Skn0tt]

I tested it by modifying node_modules. For more complex changes, you can clone the Quirrel repo, run npm run build, and then use npm link to test locally.

[sproott]

Where do I get run-s? It's used to run all the build scripts. I tried installing the run-s package, but it still says the executable doesn't exist.

[sproott]

I could take a look at simplifying the whole build process to avoid using the generate-proxies.sh script. Perhaps using tsup as it works nicely for building TS libraries into multiple module formats.

[Skn0tt]

Where do I get run-s?

run-s is part of npm-run-all, which should be installed as part of Quirrel's dev dependencies:

quirrel/package.json

Line 61 in 58bb942

"npm-run-all": "4.1.5",

I could take a look at simplifying the whole build process to avoid using the generate-proxies.sh script. Perhaps using tsup as it works nicely for building TS libraries into multiple module formats.

I'd prefer to keep the changes minimal, so we don't risk breaking any other setups.

[sproott]

I have already whipped up a version using tsup which works properly without the need to generate proxies and polluting the main library dir. I'll put it on my forked repo so you can take a look, I think it would be a step in the right direction to modernize the build process a bit.

EDIT: here is the tsup version.

But I'll continue to investigate the type: module fix. I think it will be enough to change the generate-proxies script, because with type: module the structure of reexports should be a bit different.

[sproott]

Here's the simpler fix using type: module and making the .js file export the ESM version. Not sure whether this change will break any other use cases, but afaik it shouldn't.

[sproott]

Also, I think the generate-proxies.sh script could be avoided even with the current build process by using the exports and typesVersions fields in package.json to export the files under dist/ as top level, as seen in the tsup version.

[Skn0tt]

Thanks so much for opening the two PRs! I looked at the TSUP one, and it seems like that results in bundled output (and can't be turned off). Instead of bundling all files into one, I'd like to keep the dist directory in the same shape as src, as this makes both debugging & working with static files like the UI much simpler.

So I looked into #1116, which looks good generally. I've found a couple of spots where it breaks existing imports, and at this point, i'm seriously debating if I should just switch this to ESM-only. ESM has been supported since Node v10, and Quirrel only supports Node v14 onwards. I'll work on a PR to switch over to ESM-only, let's see how good that goes.