Output the exception information when pretty switch is enabled (#504)

* Bug #1106292 output exception info

Output the exception information When pretty switch is enabled.

ChangeLog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 04/10/2020 0.21.5
+
+- Output exception information when pretty switch is enabled.
+
 ## 04/10/2020 0.21.4
 
 - Instead of replacing all the special characters in path parameters, only replace the part of parameter value which start with (http:|https:) 

lib/validate.ts

@@ -221,7 +221,28 @@ export async function validateExamples(
       }
       return errors
     } catch (e) {
-      log.error(e)
+      if (o.pretty) {
+        if (process.env["Agent.Id"]) {
+          console.log(
+            vsoLogIssueWrapper(
+              "error",
+              `Validating "examples" and "x-ms-examples" in  ${specPath}:\n`
+            )
+          )
+          /* tslint:disable-next-line:no-console no-string-literal */
+          console.error(vsoLogIssueWrapper("error", e))
+        } else {
+          console.error(
+              `Validating "examples" and "x-ms-examples" in  ${specPath}:\n`
+          )
+          /* tslint:disable-next-line:no-console no-string-literal */
+          console.error("\x1b[31m", "error", ":", "\x1b[0m")
+          /* tslint:disable-next-line:no-console no-string-literal */
+          console.error(e)
+        }
+      } else {
+        log.error(e)
+      }
       validator.specValidationResult.validityStatus = false
       updateEndResultOfSingleValidation(validator)
       return [{ inner: e }]

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "oav",
-  "version": "0.21.4",
+  "version": "0.21.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "oav",
-  "version": "0.21.4",
+  "version": "0.21.5",
   "author": {
     "name": "Microsoft Corporation",
     "email": "azsdkteam@microsoft.com",