[PLAT-5357] fix(react-native): Ensure plugin usage does not crash debugger

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## TBD
+
+### Fixed
+
+- (react-native):  Ensure plugin usage is compatible with running an app in a remote debugger [#1250](https://github.com/bugsnag/bugsnag-js/pull/1250)
+
 ## v7.6.0 (2020-01-18)
 
 As of 7.6.0 the monorepo contains `@bugsnag/react-native-cli`, a new command line tool to help set up Bugsnag in React Native projects.

packages/react-native/src/notifier.js

@@ -4,6 +4,7 @@ const NativeClient = NativeModules.BugsnagReactNative
 const REMOTE_DEBUGGING_WARNING = `Bugsnag cannot initialize synchronously when running in the remote debugger.
 
 Error reporting is still supported, but synchronous calls after Bugsnag.start() will no-op. This means Bugsnag.leaveBreadcrumb(), Bugsnag.setUser() and all other methods will only begin to work after a short delay.
+Plugins are also affected. Synchronous calls to Bugsnag.getPlugin() can be used as normal, but plugins may not report errors and set contextual data correctly in the debugger.
 
 This only affects the remote debugger. Execution of JS in the normal way (on the device) is not affected.`
 
@@ -97,36 +98,51 @@ const Bugsnag = {
       Bugsnag._client._logger.warn('Bugsnag.start() was called more than once. Ignoring.')
       return Bugsnag._client
     }
+
     if (!isDebuggingRemotely) {
       Bugsnag._client = createClient(opts)
       return Bugsnag._client
-    } else {
-      console.warn(REMOTE_DEBUGGING_WARNING)
-      let initialised = false
-      const stubClient = {}
-      CLIENT_METHODS.reduce((accum, m) => {
-        stubClient[m] = new Proxy(() => {
-          console.warn(
-            `This call to Bugsnag.${m}() is a no-op because remote debugging is enabled and Bugsnag has not yet initialized`
-          )
-        }, {
-          apply: (target, thisArg, argumentsList) => {
-            if (!initialised) return Reflect.apply(target, thisArg, argumentsList)
-            return Reflect.apply(Bugsnag._client[m], Bugsnag._client, argumentsList)
+    }
+
+    console.warn(REMOTE_DEBUGGING_WARNING)
+
+    let initialised = false
+
+    const stubSchema = { ...schema }
+    // remove the api key from the schema so it doesn't get validated – we know we don't
+    // have one at this point, and the only other alternative is to use a fake (but valid) one
+    delete stubSchema.apiKey
+    const stubClient = new Client({
+      ...opts,
+      autoTrackSessions: false,
+      autoDetectErrors: false,
+      enabledBreadcrumbTypes: []
+    }, stubSchema, internalPlugins, { name, version, url })
+
+    CLIENT_METHODS.forEach((m) => {
+      if (/^_/.test(m)) return
+      stubClient[m] = new Proxy(stubClient[m], {
+        apply: (target, thisArg, args) => {
+          if (!initialised) {
+            console.log(`Synchronous call to Bugsnag.${m}()`)
           }
-        })
-      })
-      Bugsnag._client = stubClient
-      createClientAsync(opts).then(client => {
-        initialised = true
-        Bugsnag._client = client
+          return Reflect.apply(target, thisArg, args)
+        }
       })
-      return stubClient
-    }
+    })
+
+    Bugsnag._client = stubClient
+
+    createClientAsync(opts).then(client => {
+      initialised = true
+      Bugsnag._client = client
+    })
+
+    return stubClient
   }
 }
 
-CLIENT_METHODS.map((m) => {
+CLIENT_METHODS.forEach((m) => {
   if (/^_/.test(m)) return
   Bugsnag[m] = function () {
     if (!Bugsnag._client) return console.warn(`Bugsnag.${m}() was called before Bugsnag.start()`)