Add logging for failed dev dep requests (#9638)

Author: mattcompiles

packages/core/core/src/RequestTracker.js

@@ -1166,7 +1166,8 @@ export default class RequestTracker {
     request: Request<TInput, TResult>,
     opts?: ?RunRequestOpts,
   ): Promise<TResult> {
-    let requestId = this.graph.hasContentKey(request.id)
+    let hasKey = this.graph.hasContentKey(request.id);
+    let requestId = hasKey
       ? this.graph.getNodeIdByContentKey(request.id)
       : undefined;
     let hasValidResult = requestId != null && this.hasValidResult(requestId);
@@ -1224,6 +1225,18 @@ export default class RequestTracker {
       deferred.resolve(true);
       return result;
     } catch (err) {
+      if (request.type === requestTypes.dev_dep_request) {
+        logger.verbose({
+          origin: '@parcel/core',
+          message: `Failed DevDepRequest`,
+          meta: {
+            trackableEvent: 'failed_dev_dep_request',
+            hasKey,
+            hasValidResult,
+          },
+        });
+      }
+
       this.rejectRequest(requestNodeId);
       deferred.resolve(false);
       throw err;

packages/core/core/src/requests/DevDepRequest.js

@@ -191,13 +191,17 @@ export async function runDevDepRequest<TResult>(
     id: 'dev_dep_request:' + devDepRequest.specifier + ':' + devDepRequest.hash,
     type: requestTypes.dev_dep_request,
     run: ({api}) => {
-      for (let filePath of nullthrows(devDepRequest.invalidateOnFileChange)) {
+      for (let filePath of nullthrows(
+        devDepRequest.invalidateOnFileChange,
+        'DevDepRequest missing invalidateOnFileChange',
+      )) {
         api.invalidateOnFileUpdate(filePath);
         api.invalidateOnFileDelete(filePath);
       }
 
       for (let invalidation of nullthrows(
         devDepRequest.invalidateOnFileCreate,
+        'DevDepRequest missing invalidateOnFileCreate',
       )) {
         api.invalidateOnFileCreate(invalidation);
       }