feat: support Google Cloud in adapter-auto

[LukeSchlangen]

This Pull Request supports zero-config deployments to Google Cloud Run and resolves #11951

After this change is merged (assuming npm and gcloud CLIs are installed), it should only require these three commands to create and deploy a SvelteKit application to Google Cloud Run:

1. npm create svelte@latest sveltekit-app
2. cd sveltekit-app
3. gcloud run deploy --allow-unauthenticated

---

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

• It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. For large changes, please create an RFC: https://github.com/sveltejs/rfcs
  • Allow Google Cloud Run Deployment by adding adapter-node to adapter-auto #11951
• This message body should clearly illustrate what problems it solves.
  • The Google Cloud Buildpacks team has made this update: Add support for idiomatic SvelteKit applications to support SvelteKit zero-config deployments to Google Cloud Run.
• Ideally, include a test that fails without this PR but passes with it.
  • I couldn't find any tests related to deployment environment variables. I'm happy to add one if they exist for other environments.

Tests

• Run the tests with pnpm test and lint the project with pnpm lint and pnpm check
  • I couldn't find any tests related to deployment environment variables. I'm happy to add one if they exist for other environments.

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🦋 Changeset detected

Latest commit: bc2bc17

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

This PR includes changesets to release 1 package

Name	Type
@sveltejs/adapter-auto	Minor

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[LukeSchlangen]

@ghostdevv - Thank you so much for the approval. This is my first PR to Svelte, so I wanted to see if there's anything else I need to do to merge this PR?

No rush, I just want to make sure I haven't missed anything. (This was my first time using Changeset Bot, so I'm not sure I got everything right.)

[geoffrich]

@LukeSchlangen there shouldn't be anything else needed from you at the moment. We'll want to get another approval on this and then hopefully should be good to merge or address feedback.

[LukeSchlangen]

Sounds great. Thanks so much for your help!

[geoffrich]

Followed the instructions on a fresh SvelteKit app and confirmed this works without additional configuration - all I did was manually install the Node adapter (which adapter-auto will handle after this PR). Thanks!

[geoffrich]

Requesting reviews from a couple other maintainers who have reviewed similar PRs in the past just to make sure no one has any objections, but I think this is good to merge.

[LukeSchlangen]

Thank you all so much!

No rush on my end, but for transparency, I did test these commands and they don't work yet:

1. npm init svelte@latest sveltekit-app
2. cd sveltekit-app
3. gcloud run deploy --allow-unauthenticated

I still get the error: Could not detect a supported production environment. See https://kit.svelte.dev/docs/adapters to learn how to configure your app to run on the platform of your choosing, but I'm guessing that won't be ready until the next release since it seems to pull from 6.0.10 which was last week?

As long as that sounds right to you, I think we're in great shape!

[ghostdevv]

@LukeSchlangen It'll be released when #12042 is merged!

[LukeSchlangen]

Fantastic. That's very exciting.

Thanks for all your help!

[benmccann]

Released

[LukeSchlangen]

Confirmed deployment working on Google Cloud Run!
https://sveltekit-app-ywmavwferq-uc.a.run.app/

Thanks everyone!