Task Lib - Logging Detected Agent Version in AssertAgent (#1101)

Author: AdityaMankal-MS

node/task.ts

@@ -176,8 +176,9 @@ export function assertAgent(minimum: string): void {
     }
 
     let agent = getVariable('Agent.Version');
+    debug('Detected Agent.Version=' + (agent ? agent : 'undefined'));
     if (agent && semver.lt(agent, minimum)) {
-        throw new Error(`Agent version ${minimum} or higher is required`);
+        throw new Error(`Agent version ${minimum} or higher is required. Detected Agent version: ${agent}`);
     }
 }
 
@@ -2751,4 +2752,4 @@ if (!global['_vsts_task_lib_loaded']) {
     im._loadData();
     im._exposeProxySettings();
     im._exposeCertSettings();
-}
+}