Missing service-worker file

[patoi]

Describe the bug

With "@sveltejs/kit": "2.12.1", the service-worker/index.ts file compiled and generated in .svelte-kit/output/client/service-worker.mjs (see "Initial commit") as expected.

Issue:

With "@sveltejs/kit": "2.12.2", and later versions doesn't compile the service-worker/index.ts file and it's missing from the app dir (see "Issue" commit message)

Reproduction

https://github.com/patoi/issue-sveltekit-service-worker-build

Logs

System Info

System:
    OS: macOS 15.1.1
    CPU: (14) arm64 Apple M3 Max
    Memory: 135.00 MB / 36.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.17.0 - ~/.nvm/versions/node/v20.17.0/bin/node
    npm: 10.8.2 - ~/.nvm/versions/node/v20.17.0/bin/npm
    pnpm: 9.12.3 - ~/.nvm/versions/node/v20.17.0/bin/pnpm
  Browsers:
    Chrome: 131.0.6778.266
    Edge: 132.0.2957.115
    Safari: 18.1.1
  npmPackages:
    @sveltejs/adapter-auto: ^4.0.0 => 4.0.0 
    @sveltejs/kit: 2.12.2 => 2.12.1 
    @sveltejs/vite-plugin-svelte: ^4.0.0 => 4.0.4 
    svelte: ^5.0.0 => 5.19.0 
    vite: ^5.4.11 => 5.4.12

Severity

blocking an upgrade

Additional Information

We need to downgrade to SvelteKit 2.12.1