feat: switched from worker API to fs based

packages/runner/package.json

@@ -16,12 +16,13 @@
     }
   },
   "devDependencies": {
-    "@morten-olsen/mini-loader-configs": "workspace:^",
     "@morten-olsen/mini-loader": "workspace:^",
+    "@morten-olsen/mini-loader-configs": "workspace:^",
     "@types/node": "^20.10.8",
     "typescript": "^5.3.3"
   },
   "dependencies": {
-    "eventemitter3": "^5.0.1"
+    "eventemitter3": "^5.0.1",
+    "nanoid": "^5.0.4"
   }
 }

packages/runner/src/index.ts

@@ -1,6 +1,11 @@
 import { Worker } from 'worker_threads';
+import os from 'os';
 import { EventEmitter } from 'eventemitter3';
 import { Event } from '@morten-olsen/mini-loader';
+import { join } from 'path';
+import { createServer } from 'http';
+import { nanoid } from 'nanoid';
+import { chmod, mkdir, unlink, writeFile } from 'fs/promises';
 
 type RunEvents = {
   message: (event: Event) => void;
@@ -10,18 +15,40 @@ type RunEvents = {
 
 type RunOptions = {
   script: string;
-  input?: unknown;
+  input?: Buffer | string;
   secrets?: Record<string, string>;
 };
 
 const run = async ({ script, input, secrets }: RunOptions) => {
+  const dataDir = join(os.tmpdir(), 'mini-loader', nanoid());
+  await mkdir(dataDir, { recursive: true });
+  await chmod(dataDir, 0o700);
+  const hostSocket = join(dataDir, 'host');
+  const server = createServer();
+  const inputLocation = join(dataDir, 'input');
+
+  if (input) {
+    await writeFile(inputLocation, input);
+  }
+
   const emitter = new EventEmitter<RunEvents>();
+
+  server.on('connection', (socket) => {
+    socket.on('data', (data) => {
+      const message = JSON.parse(data.toString());
+      emitter.emit('message', message);
+    });
+  });
+
   const worker = new Worker(script, {
     eval: true,
-    env: secrets,
+    env: {
+      HOST_SOCKET: hostSocket,
+      SECRETS: JSON.stringify(secrets),
+      INPUT_PATH: inputLocation,
+    },
     workerData: {
       input,
-      secrets,
     },
   });
 
@@ -29,10 +56,14 @@ const run = async ({ script, input, secrets }: RunOptions) => {
     worker.on('message', (message: Event) => {
       emitter.emit('message', message);
     });
-    worker.on('exit', () => {
+    worker.on('exit', async () => {
+      server.close();
+      await unlink(hostSocket);
       resolve();
     });
-    worker.on('error', (error) => {
+    worker.on('error', async (error) => {
+      server.close();
+      await unlink(hostSocket);
       reject(error);
     });
   });