fix(twilio-run): turn off fork-process in inspect mode (#462)

* fix(twilio-run): turn off fork-process in inspect mode

* Update start.test.ts

---------

Co-authored-by: makserik <15821542+makserik@users.noreply.github.com>
Co-authored-by: Victor Ayogu <vayogu@twilio.com>

.changeset/warm-moles-learn.md

@@ -0,0 +1,6 @@
+---
+'twilio-run': patch
+'@twilio-labs/plugin-serverless': patch
+---
+
+Fix of debug/inspect mode by disabling fork process

packages/twilio-run/__tests__/config/start.test.ts

@@ -285,4 +285,18 @@ describe('getConfigFromCli', () => {
       expect(startConfig.baseDir).toEqual(path.resolve(config.cwd));
     }
   });
+
+  test('turns off fork process if inspect is enabled', async () => {
+    require('../../src/config/utils/package-json').__setPackageJson({});
+    const config = {
+      dir: './other_dir',
+      inspect: '',
+    } as unknown as StartCliFlags;
+    if (config.dir) {
+      const startConfig = await getConfigFromCli(config);
+      expect(startConfig.baseDir).toEqual(path.resolve(config.dir));
+      expect(startConfig.forkProcess).toEqual(false);
+      expect(startConfig.inspect).not.toEqual(undefined);
+    }
+  });
 });

packages/twilio-run/src/config/start.ts

@@ -186,6 +186,12 @@ export async function getConfigFromCli(
   config.assetsFolderName = cli.assetsFolder;
   config.functionsFolderName = cli.functionsFolder;
   config.forkProcess = cli.forkProcess;
+
+  if (typeof config.inspect !== 'undefined') {
+    debug('Disabling fork-process in inspect mode.');
+    config.forkProcess = false;
+  }
+
   config.pkgJson = pkgJson;
 
   return config;