Log when overriding preference

Author: timtmok

src/vs/platform/update/electron-main/abstractUpdateService.ts

@@ -87,6 +87,9 @@ export abstract class AbstractUpdateService implements IUpdateService {
 	protected async initialize(): Promise<void> {
 		// --- Start Positron ---
 		const updateChannel = process.env.POSITRON_UPDATE_CHANNEL ?? this.configurationService.getValue<string>('update.positron.channel');
+		if (process.env.POSITRON_UPDATE_CHANNEL) {
+			this.logService.info('update#ctor - using update channel from environment variable', process.env.POSITRON_UPDATE_CHANNEL);
+		}
 		this.enableAutoUpdate = this.configurationService.getValue<boolean>('update.autoUpdate');
 
 		if (this.environmentMainService.disableUpdates) {