patch: Add append flags to Serial Capture file

Signed-off-by: Vipul Gupta (@vipulgupta2048) <[email protected]>

lib/workers/testbot.ts

@@ -22,6 +22,8 @@ import * as Stream from 'stream';
 import { manageHandlers } from '../helpers';
 import ScreenCapture from '../helpers/graphics';
 import NetworkManager, { Supported } from '../helpers/nm';
+import once from 'lodash/once';
+
 
 // TODO: Consider moving network and screen capture logic to testbot SDK.
 
@@ -116,8 +118,12 @@ class TestBotWorker extends EventEmitter implements Leviathan.Worker {
 	public async powerOn() {
 		const dutLog = await this.hatBoard.openDutSerial();
 		if (dutLog) {
-			this.dutLogStream = createWriteStream(dutSerialPath);
+			this.dutLogStream = createWriteStream(dutSerialPath, { flags: `a+` });
 			dutLog.pipe(this.dutLogStream);
+		} else {
+			once(() => {
+				console.error(`Can't record serial logs: Getting ${dutLog} output`)
+			})
 		}
 		console.log('Trying to power on DUT...');
 		await this.deviceInteractor.powerOn();

package.json

@@ -4,7 +4,6 @@
   "scripts": {
     "lint:fix": "balena-lint -e js -e ts --fix bin/ lib/ test/",
     "lint": "balena-lint -u -e js -e ts --tests lib/ bin/ test/ && tsc --noEmit",
-    "preinstall": "for component in 'worker'; do npm --prefix $component install; done",
     "clean": "rm -rf build",
     "test": "npm run lint:fix && npm run lint && npm run test:cov",
     "build": "npm run clean && tsc",