chore: update build process to use custom script for workspace builds

Author: ThornWalli

package-lock.json

@@ -24,8 +24,7 @@
     "packages/observables/package.json"
   ],
   "scripts": {
-    "postinstall": "npm run build:packages",
-    "build:packages": "npm run build --workspaces --if-present",
+    "postinstall": "node scripts/build-workspaces.js",
     "lint": "npm run lint:es",
     "lint:es": "eslint --flag unstable_native_nodejs_ts_config .",
     "prepare": "husky",

package.json

@@ -0,0 +1,28 @@
+#!/usr/bin/env node
+
+import { execSync } from 'node:child_process';
+import { dirname, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const cwd = resolve(__dirname, '..');
+
+function run(cmd) {
+  try {
+    console.log(`👉 Running: ${cmd}`);
+    execSync(cmd, { cwd, stdio: 'inherit' });
+    return true;
+  } catch (err) {
+    console.warn(`⚠️ Failed: ${cmd} – ${err.message}`);
+    return false;
+  }
+}
+
+// 1️⃣ zuerst mit pnpm im Filter-Mode
+if (!run('pnpm -F "./packages/**" run build --if-present')) {
+  // 2️⃣ Fallback auf npm workspaces
+  if (!run('npm run build --workspaces --if-present')) {
+    console.error('❌ Build konnte nicht ausgeführt werden');
+    process.exit(1);
+  }
+}