feat: support unbundled deployments #13259
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This changes the adapter to stop using the old Workers Sites (kv-asset-handler) approach.
Instead, making use of the new Workers Static Assets feature, which is embedded into Cloudflare natively.
Also this change removes the extra esbuild step that was being run inside the adapter, relying upon Wrangler to do the bundling.
The extra esbuild step required a hardcoded list of Node.js compatible modules.
This is no longer needed since Wrangler now manages all of that.
- This version of the adapter requires Wrangler version 3.87.0 or later.
Run `npm add -D wrangler@latest` (or similar) in your project to update Wrangler.
- The user's Wrangler configuration (`wrangler.toml`) must be migrated from using Workers Sites to using Workers Assets.
Previously a user's `wrangler.toml` might look like:
```toml
name = "<your-site-name>"
account_id = "<your-account-id>"
compatibility_date = "2021-11-12"
main = "./.cloudflare/worker.js"
# Workers Sites configuration
site.bucket = "./.cloudflare/public"
```
Change it to to look like:
```toml
name = "<your-site-name>"
account_id = "<your-account-id>"
compatibility_date = "2021-11-12"`
main = ".svelte-kit/cloudflare/server/index.js"
# Workers Assets configuration
assets = { directory = ".svelte-kit/cloudflare/client" }
```
- Workers Assets defaults to serving assets directly for a matching request, rather than routing it through the Worker code.
The previous adapter would add custom headers to assets responses (such as `cache-control`, `content-type`, and `x-robots-tag`. Such direct asset responses no longer contain these headers - but the will include eTag headers that have proven (in Pages) to be an effective caching strategy for assets.
If you wish to always run the Worker before every request then add `serve_directly = false` to the assets configuration section. For example:
```toml
assets = { directory = ".svelte-kit/cloudflare/client", serve_directly = false }
```
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eltigerchino
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closes #2963
requires #13072 to be merged first.
This PR adjusts the Cloudflare Workers adapter so that it can deploy workers unbundled. It also adds documentation to guide users on how to do it.
I've omitted making these changes to the Cloudflare Pages adapter because I don't think it's possible to deploy unbundled without including the server files as public assets. The config file only allows specifying a single build directory as public and no option to ignore select files or directories.
Please don't delete this checklist! Before submitting the PR, please make sure you do the following:
Tests
pnpm testand lint the project withpnpm lintandpnpm checkChangesets
pnpm changesetand following the prompts. Changesets that add features should beminorand those that fix bugs should bepatch. Please prefix changeset messages withfeat:,fix:, orchore:.Edits