Keep native collection launches responsive

src/lib/server/provisioning/launch-worker.ts

@@ -0,0 +1,38 @@
+import { parentPort } from 'node:worker_threads';
+import { posix } from 'node:path';
+import { db } from '../db/index.js';
+import { relDestForKind } from '../config.js';
+import { captureRecipe, summarizeRecipe } from '../fleet/launch-recipes.js';
+import { sha256Buffer } from '../fleet/files.js';
+import type { NativeLaunchInput } from './launch-preparation.js';
+
+parentPort!.on('message', ({ id, input }: { id: number; input: NativeLaunchInput }) => {
+    try {
+        // All file versions and composed configuration belong to one snapshot.
+        const recipe = db().transaction(() => ({ ...captureRecipe(input.game, input.mapSlug),
+            native: input.native, image: input.instance.image }))();
+        const instance = input.instance;
+        const payload = {
+            name: instance.server, game: recipe.game, libraryId: instance.library_id, image: instance.image,
+            port: instance.port, bindAddress: instance.bind_address, rconPassword: input.rconPassword,
+            env: { PLUTAINER_SERVER_NAME: instance.server, PLUTAINER_PORT: String(instance.port),
+                PLUTAINER_GAME: recipe.game === 't6' ? 't6zm' : 't5sp', PLUTAINER_CONFIG_FILE: recipe.configFile,
+                PLUTAINER_MAP_ROTATE: 'false',
+                PLUTAINER_EXTRA_ARGS: `+exec electric_cherry_map.cfg +set tws_server_id ${instance.server} +map_rotate`,
+                PLUTO_SERVER_KEY: input.serverKey },
+            files: recipe.files.map(file => ({ path: posix.join(relDestForKind(file.kind, recipe.game), file.path),
+                contentBase64: file.content, sha256: file.sha256 })),
+            ...(input.rebuild ? { nextGeneration: instance.generation + 1 } : {})
+        };
+        const encode = (value: unknown) => new TextEncoder().encode(JSON.stringify(value));
+        const recipeJson = encode(recipe);
+        const payloadJson = encode(payload);
+        const plan = { ...recipe, files: recipe.files.map(({ content: _content, ...file }) => file) };
+        const recipeSummary = JSON.stringify(summarizeRecipe(plan, sha256Buffer(Buffer.from(recipeJson.buffer))));
+        // Transfer ownership of the encoded bytes; do not clone giant strings or objects.
+        parentPort!.postMessage({ id, value: { recipe: plan, recipeSummary, recipeJson, payloadJson } },
+            [recipeJson.buffer, payloadJson.buffer]);
+    } catch (error) {
+        parentPort!.postMessage({ id, error: error instanceof Error ? error.message : 'Launch preparation failed.' });
+    }
+});