feat: use config.kit.paths.base for static assets

[hmnd]

Prefixes appDir with config.kit.paths.base for adapter-(cloudflare, cloudflare-workers, netlify). Didn't touch node, as there's some discussion around how that should be handled differently in #3726. Would be great if @asendia and @tv42 could test the adapters for their respective issues, since I've never used those platforms with sveltekit.

I'm aware it would be better if the base path was handled outside of SvelteKit instead of creating nested folders like this, but (at least for workers sites), I can't think of a better alternative.

fixes #4442, fixes #2843, fixes #3726

• add manifest.prefix and builder.getAppPrefixDirectory()
• adapter-cloudflare*: use manifest.prefix instead of manifest.appDir
• adapter-netlify: use prefixed appDir for cache headers
• adapter-vercel: use prefixed appDir for routes.json
• adapter-cloudflare, adapter-cloudflare-workers, adapter-netlify: write static assets to "$dest/$base"

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🦋 Changeset detected

Latest commit: 069a17a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 7 packages

Name	Type
@sveltejs/adapter-cloudflare	Patch
@sveltejs/adapter-cloudflare-workers	Patch
@sveltejs/adapter-netlify	Patch
@sveltejs/adapter-node	Patch
@sveltejs/adapter-vercel	Patch
@sveltejs/kit	Patch
@sveltejs/adapter-auto	Patch

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[asendia]

Hi @hmnd, thank you for the quick action, I can confirm that the assets directory now includes the base path (path = admin):

In the build/_headers file, I see double slash //, is this expected?

//admin/_app//*
  cache-control: public
  cache-control: immutable
  cache-control: max-age=31536000

[hmnd]

@asendia No problem. Wanted to fix this for the workers adapter, and then saw your issue pop up too.

Thanks for catching that! Should be fixed now.

[arggh]

Thanks for this PR, perfect timing 👌 I gave it a try and the first deploy failed with...

17:21:23.048 | > Cannot find package 'devalue' imported from /opt/buildhome/repo/app/.svelte-kit/output/server/index.js
-- | --
17:21:23.049 | at new NodeError (node:internal/errors:371:5)
17:21:23.049 | at packageResolve (node:internal/modules/esm/resolve:932:9)
17:21:23.049 | at moduleResolve (node:internal/modules/esm/resolve:978:18)
17:21:23.049 | at defaultResolve (node:internal/modules/esm/resolve:1080:11)
17:21:23.049 | at ESMLoader.resolve (node:internal/modules/esm/loader:530:30)
17:21:23.049 | at ESMLoader.getModuleJob (node:internal/modules/esm/loader:251:18)
17:21:23.049 | at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:79:40)
17:21:23.049 | at link (node:internal/modules/esm/module_job:78:36)

I'm not sure whether it failed due to a misconfiguration on my part while running the forked version of SvelteKit, or the actual changes in this PR.

I got it fixed by adding devalue as a dependency to my app, and can confirm that the kit.paths.base configuration is now working on Cloudflare as expected 👍

[hmnd]

@asendia @arggh FYI in case you need this to work asap like me, I've published the fork at @icewolf/svelte-kit@1.0.0-next.303.bleeding.0 while this is awaiting review.
pnpm add -D "@sveltejs/kit@npm:@icewolf/svelte-kit@^1.0.0-next.303.bleeding"

[dmkret]

Hi, @hmnd! Can you add the fix to adapter-node too?

[arggh]

@hmnd not sure if I'm doing something funky, but for some reason files in /static aren't being found when using kit.paths.base. I just get the SvelteKit 404 page. Imported assets work.

[benmccann]

@hmnd thanks for this and sorry for letting it sit! It looks like it will need to be rebased since #5618 (removes writeStatic) and #5332 (moves core/dev and code/build to vite folder) were merged

[benmccann]

It looks like this missed a place where Netlify Edge and adapter-node need to be updated. I'll take a stab at that

[benmccann]

I missed that the PR description said adapter-node was skipped on purpose and you preferred to handle that one separately. Anyway, I updated this PR to do the simple fix of just writing the files to a sub-directory with the base path for adapter-node in the same way as the others. That should be enough to get things working for 1.0

I created a new issue for the better fix of mounting the directories under a different path at runtime rather than changing the location on disk: #7242

Right now, writeClient and writePrerendered are always called with the base path as a suffix, so I initially I thought we might be able to refactor by moving that inside those methods, but that wouldn't work if we allow changing mount points in the future or have dynamic base paths.

This doesn't touch adapter-static because I didn't have time and couldn't find that anyone filed an issue for that one besides the dynamic base paths issue