chore: separate generated from non-generated server code (#8429)

* rename node.server to node.has_server_load - more descriptive

* rename core/prerender to core/postbuild

* fix

* move logic around

* rename server/index.js to server/respond.js

* move some logic around

* move some stuff around

* remove options.paths

* move read to internal request options

* remove version from SSROptions

* tidy up

* add note

* tidy up

* remove public_env from SSROptions

* move logic to sync

* notes to self

* WIP

* hack around the problem

* oops

* partial solution to stack traces

* fix a few more tests

* insane

* use __SVELTEKIT_DEV__ instead of state.dev

* fix

* set globalThis.__SVELTEKIT_DEV__

* tidy some stuff up

* add ambient declaration

* set paths correctly

* remove import

* DRY

* reduce indirection

* use private fields

* separate manifest from server configuration

* tidy up

* exclude SvelteKit deps from Vite processing

* regenerate server-internal.js as necessary

* tidy up

* see if this fixes windows

* of course it's a path separator issue

* remove unused exports

* tidy up, see if this still works in windows

* remove some unused code

* Create gorgeous-actors-run.md

Co-authored-by: Simon Holthausen <simon.holthausen@vercel.com>

Author: Rich-Harris

.changeset/gorgeous-actors-run.md

@@ -0,0 +1,5 @@
+---
+"@sveltejs/kit": patch
+---
+
+chore: separate generated from non-generated server code

.prettierrc

@@ -25,7 +25,7 @@
 				"packages/package/test/fixtures/**/expected/**/*",
 				"packages/package/test/watch/expected/**/*",
 				"packages/package/test/watch/package/**/*",
-				"packages/kit/src/core/prerender/fixtures/**/*",
+				"packages/kit/src/core/postbuild/fixtures/**/*",
 				"packages/migrate/migrations/routes/*/samples.md"
 			],
 			"options": {

packages/kit/src/core/adapt/builder.js

@@ -126,7 +126,7 @@ export function create_builder({ config, build_data, routes, prerendered, log })
 
 		generateFallback(dest) {
 			// do prerendering in a subprocess so any dangling stuff gets killed upon completion
-			const script = fileURLToPath(new URL('../prerender/fallback.js', import.meta.url));
+			const script = fileURLToPath(new URL('../postbuild/fallback.js', import.meta.url));
 
 			const manifest_path = `${config.kit.outDir}/output/server/manifest-full.js`;
 

packages/kit/src/core/prerender/crawl.js renamed to packages/kit/src/core/postbuild/crawl.js

@@ -14,17 +14,19 @@ installPolyfills();
 
 const server_root = join(config.outDir, 'output');
 
+/** @type {import('types').ServerInternalModule} */
+const { set_building, set_paths } = await import(
+	pathToFileURL(`${server_root}/server/internal.js`).href
+);
+
 /** @type {import('types').ServerModule} */
-const { Server, override } = await import(pathToFileURL(`${server_root}/server/index.js`).href);
+const { Server } = await import(pathToFileURL(`${server_root}/server/index.js`).href);
 
 /** @type {import('types').SSRManifest} */
 const manifest = (await import(pathToFileURL(manifest_path).href)).manifest;
 
-override({
-	building: true,
-	paths: config.paths,
-	read: (file) => readFileSync(join(config.files.assets, file))
-});
+set_building(true);
+set_paths(config.paths);
 
 const server = new Server(manifest);
 await server.init({ env: JSON.parse(env) });
@@ -36,7 +38,8 @@ const rendered = await server.respond(new Request(config.prerender.origin + '/[f
 	prerendering: {
 		fallback: true,
 		dependencies: new Map()
-	}
+	},
+	read: (file) => readFileSync(join(config.files.assets, file))
 });
 
 mkdirp(dirname(dest));