bug: entry.js generation does not reference import paths correctly on Windows.

[Avislux]

Describe the Bug

When running svelte-kit build with the adapter enabled, the build fails after the vite transformation. I am on Windows 10.
Here's an snippet of the output.

`> Using svelte-adapter-firebase
X [ERROR] Could not resolve "../H:directoryto.svelte-kit/output/server/index.js"

.svelte-kit/firebase/entry.js:1:21:
  1 │ import {Server} from '../H:\directory\to/output/server/index.js';
    ╵                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

X [ERROR] Could not resolve "../H:directoryto.svelte-kit/output/server/manifest.js"

.svelte-kit/firebase/entry.js:2:23:
  2 │ import {manifest} from '../H:\directory\to/output/server/manifest.js';
    ╵                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Build failed with 2 errors:
.svelte-kit/firebase/entry.js:1:21: ERROR: Could not resolve "../H:directoryto.svelte-kit/output/server/index.js"
.svelte-kit/firebase/entry.js:2:23: ERROR: Could not resolve "../H:directoryto.svelte-kit/output/server/manifest.js"
`

And in the entry.js file in .svelte-kit/firebase. the first two lines for the imports for Server and manifest the paths are incorrectly formed.

Steps to Reproduce

1. Run npm run build on project
2. Notice that after vite transform is finished, the build fails.

Expected Behaviour

When building the project with the firebase adapter, the build completes.

svelte-adapter-firebase version

0.14.0

sveltejs/kit version

1.0.0-next.334

[Juan Rodriguez]

Apologies for this, I don't have a Windows machine to test on. What's the best way to reach out to you to test a new build?

That looks like an issue with

const relativePath = path.posix.relative(dirs.tmp, builder.getServerDirectory());

from index.js

Or, more specifically, from dirs.tmp from line 37

tmp: path.join('.svelte-kit', 'firebase'),

[Avislux]

@Nushio Discord is probably easiest. My discord username is my Github username with #6301

[Juan Rodriguez]

@Nushio Discord is probably easiest. My discord username is my Github username with #6301

Sent an FR. I'm my username #4570

[James Hegedus]

In future I want to run the e2e test suite on Windows inside GitHub Actions. I believe this is possible now.