Cached config is missing build.outDir

[zanmato]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Fastify version

5.0.0

Plugin version

1.0.0

Node.js version

22

Operating system

Linux

Operating system version (i.e. 20.04, 11.3, 10)

24.04

Description

When running in production and using CACHE_DIR, outDir will be unset in the generated dist config, causing an undefined error here: https://github.com/fastify/fastify-vite/blob/dev/packages/fastify-vue/routing.js#L114-L115

However I'm not sure if it should be changed from build.outDir to fastify.clientOutDir (and remove the client/ prefix of the html path) or to make the dist config write the outDir value?

Link to code that reproduces the bug

No response

Expected Behavior

No response

[onlywei]

Try v8.0.0-alpha.2

[zanmato]

Try v8.0.0-alpha.2

It's the same issue, my dist file in CACHE_DIR looks like this:

{
  "base": "/",
  "root": "/mnt/dev/src/workspace/frontend/client",
  "build": {
    "assetsDir": "assets"
  },
  "fastify": {
    "clientOutDir": "dist/client",
    "serverOutDir": "dist/server"
  }
}

As you can see build.outDir is unset, I think the best solution is probably to set it here https://github.com/fastify/fastify-vite/blob/dev/packages/fastify-vite/plugin.mjs#L38 then it will work both with and without the cached config

[onlywei]

Gotcha. I just tested this out and the vite.build.outDir is intentionally not set because it needs to be either the clientOutDir or the serverOutDir depending on which build is being executed by vite. Even if you unset CACHE_DIR and use the default behavior of find-cache-dir, it will not be set.

@galvez I believe the issue is within the @fastify/vue package in the line that @zanmato has reported.

[onlywei]

@zanmato are you using SSR?

[zanmato]

@zanmato are you using SSR?

Yes, both SSR and CSR

[zanmato]

I've already fixed a couple of issues in the vue rendering file in my PR #187
This is the last issue that I found, just didn't know which way you preferred to solve it