Transport & Reroute hooks are mandatory if `hooks.(js|ts)` exists

[WarningImHack3r]

Describe the bug

When the hooks.(js|ts) file exists and does not contain an exported transport function, the following Vite warning is emitted:

.svelte-kit/generated/client-optimized/app.js (21:28): "transport" is not exported by "src/hooks.ts", imported by ".svelte-kit/generated/client-optimized/app.js"

The exact same thing is true for the reroute function.

Reproduction

1. create a SvelteKit app
2. create an empty src/hooks.ts
3. npm run build

Logs

System Info

(SvelteLab specs)

  System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.20.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    @sveltejs/adapter-auto: ^3.0.0 => 3.3.1 
    @sveltejs/kit: ^2.5.27 => 2.17.3 
    @sveltejs/vite-plugin-svelte: ^5.0.0 => 5.0.3 
    svelte: ^5 => 5.20.4 
    vite: ^6.0.0 => 6.2.0

Severity

annoyance

Additional Information

No response

[adamshand]

Seeing this as well. Only using reroute in hooks.ts and getting this error on build. Running latest everything ...

vite v6.2.3 building SSR bundle for production...
✓ 244 modules transformed.
vite v6.2.3 building for production...
.svelte-kit/generated/client-optimized/app.js (42:28): "transport" is not exported by "src/hooks.ts", imported by ".svelte-kit/generated/client-optimized/app.js".

[Karakatiza666]

Possibly related: transport hook does not seem to be loaded (Inspected via render_data and get_data_json in node_modules/@sveltejs/kit/src/runtime/server/data/index.js). Tried with reroute both defined and not defined.
When inspecting options.hooks.transport in this file I get

{
  handle: [AsyncFunction: handle],
  handleError: [Function (anonymous)],
  handleFetch: [Function (anonymous)],
  reroute: [Function (anonymous)],
  transport: {}
}

[WarningImHack3r]

Possibly related: transport hook does not seem to be loaded (Inspected via render_data and get_data_json in node_modules/@sveltejs/kit/src/runtime/server/data/index.js). Tried with reroute both defined and not defined. When inspecting options.hooks.transport in this file I get

{
  handle: [AsyncFunction: handle],
  handleError: [Function (anonymous)],
  handleFetch: [Function (anonymous)],
  reroute: [Function (anonymous)],
  transport: {}
}

It's just that transport is an object (of functions), by default it's empty, that's it

[Karakatiza666]

But I expect it to include my definition exported from hooks.config.ts:

export const transport = { BigNumber: { encode( ...

[WarningImHack3r]

Yeah true