extension/src/developerSurvey: append source query parameter to url

For #2891

Change-Id: I54d017eaa53c94606171993560263c8c52d6afdd
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/697455
Auto-Submit: Hongxiang Jiang <[email protected]>
Reviewed-by: Todd Kulesza <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Robert Findley <[email protected]>

Author: h9jiang

extension/src/developerSurvey/config.ts

@@ -7,6 +7,7 @@ import * as cp from 'child_process';
 import * as fs from 'fs';
 import * as path from 'path';
 import * as util from 'util';
+import { URL } from 'url';
 import { getStateConfig } from '../goSurvey';
 import { getBinPath } from '../util';
 import { updateGlobalState } from '../stateUtils';
@@ -100,6 +101,13 @@ export async function getLatestDeveloperSurvey(now: Date): Promise<DeveloperSurv
 		lastDateUpdated: now
 	};
 
+	// The survey URL stored in config.json is the raw survey URL. We add the
+	// s=v (for vscode) query parameter to identify the source of the survey
+	// respondent.
+	const url = new URL(config.URL);
+	url.searchParams.append('s', 'v');
+	config.URL = url.toString();
+
 	updateGlobalState(DEVELOPER_SURVEY_CONFIG_STATE_KEY, JSON.stringify(newState));
 
 	outputChannel.info(`Using fetched Go developer survey: ${newState.version}`);

extension/test/gopls/survey.test.ts

@@ -112,13 +112,13 @@ suite('developer survey tests', () => {
 		const oldConfig: config.DeveloperSurveyConfig = {
 			StartDate: new Date('2025-07-01T00:00:00Z'),
 			EndDate: new Date('2025-08-01T00:00:00Z'),
-			URL: 'https://google.com/survey/old'
+			URL: 'https://google.com/survey/old?s=v'
 		};
 
 		const newConfig = {
 			StartDate: new Date('2025-09-01T00:00:00Z'),
 			EndDate: new Date('2025-10-01T00:00:00Z'),
-			URL: 'https://google.com/survey/new'
+			URL: 'https://google.com/survey/new?s=v'
 		};
 
 		// old state, now, module survey config => return survey config