Add inspector attach to RN Dev Menu (iOS)

Reviewed By: Hypuk

Differential Revision: D6405831

fbshipit-source-id: ffecfbf85a35fad4d0c9a823c5e637a6b9e202ee

React/DevSupport/RCTDevMenu.m

@@ -17,6 +17,10 @@
 
 #if RCT_DEV
 
+#if RCT_ENABLE_INSPECTOR
+#import "RCTInspectorDevServerHelper.h"
+#endif
+
 NSString *const RCTShowDevMenuNotification = @"RCTShowDevMenuNotification";
 
 @implementation UIWindow (RCTDevMenu)
@@ -199,6 +203,14 @@ - (void)addItem:(RCTDevMenuItem *)item
     [bridge reload];
   }]];
 
+  if (devSettings.isNuclideDebuggingAvailable) {
+    [items addObject:[RCTDevMenuItem buttonItemWithTitle:[NSString stringWithFormat:@"Debug JS in Nuclide %@", @"\U0001F4AF"] handler:^{
+#if RCT_ENABLE_INSPECTOR
+      [RCTInspectorDevServerHelper attachDebugger:@"ReactNative" withBundleURL:bridge.bundleURL withView: RCTPresentedViewController()];
+#endif
+    }]];
+  }
+
   if (!devSettings.isRemoteDebuggingAvailable) {
     [items addObject:[RCTDevMenuItem buttonItemWithTitle:@"Remote JS Debugger Unavailable" handler:^{
       UIAlertController *alertController = [UIAlertController
@@ -209,7 +221,12 @@ - (void)addItem:(RCTDevMenuItem *)item
     }]];
   } else {
     [items addObject:[RCTDevMenuItem buttonItemWithTitleBlock:^NSString *{
-      return devSettings.isDebuggingRemotely ? @"Stop Remote JS Debugging" : @"Debug JS Remotely";
+      NSString *title = devSettings.isDebuggingRemotely ? @"Stop Remote JS Debugging" : @"Debug JS Remotely";
+      if (devSettings.isNuclideDebuggingAvailable) {
+        return [NSString stringWithFormat:@"%@ %@", title, @"\U0001F645"];
+      } else {
+        return title;
+      }
     } handler:^{
       devSettings.isDebuggingRemotely = !devSettings.isDebuggingRemotely;
     }]];

React/DevSupport/RCTInspectorDevServerHelper.h

@@ -2,6 +2,8 @@
 
 #import <Foundation/Foundation.h>
 #import <JavaScriptCore/JSBase.h>
+#import <UIKit/UIKit.h>
+
 #import <React/RCTDefines.h>
 
 #if RCT_DEV
@@ -11,6 +13,9 @@
 + (void)connectForContext:(JSGlobalContextRef)context
             withBundleURL:(NSURL *)bundleURL;
 + (void)disableDebugger;
++ (void)attachDebugger:(NSString *)owner
+         withBundleURL:(NSURL *)bundleURL
+              withView:(UIViewController *)view;
 @end
 
 #endif

React/DevSupport/RCTInspectorDevServerHelper.mm

@@ -4,6 +4,7 @@
 
 #import <jschelpers/JSCWrapper.h>
 #import <UIKit/UIKit.h>
+#import <React/RCTLog.h>
 
 #import "RCTDefines.h"
 #import "RCTInspectorPackagerConnection.h"
@@ -12,16 +13,13 @@
 
 static NSString *const kDebuggerMsgDisable = @"{ \"id\":1,\"method\":\"Debugger.disable\" }";
 
-static NSString *getDebugServerHost(NSURL *bundleURL)
+static NSString *getServerHost(NSURL *bundleURL, NSNumber *port)
 {
   NSString *host = [bundleURL host];
   if (!host) {
     host = @"localhost";
   }
 
-  // Inspector Proxy is run on a separate port (from packager).
-  NSNumber *port = @8082;
-
   // this is consistent with the Android implementation, where http:// is the
   // hardcoded implicit scheme for the debug server. Note, packagerURL
   // technically looks like it could handle schemes/protocols other than HTTP,
@@ -32,14 +30,26 @@
 
 static NSURL *getInspectorDeviceUrl(NSURL *bundleURL)
 {
+  NSNumber *inspectorProxyPort = @8082;
   NSString *escapedDeviceName = [[[UIDevice currentDevice] name] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
   NSString *escapedAppName = [[[NSBundle mainBundle] bundleIdentifier] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
   return [NSURL URLWithString:[NSString stringWithFormat:@"http://%@/inspector/device?name=%@&app=%@",
-                                                        getDebugServerHost(bundleURL),
+                                                        getServerHost(bundleURL, inspectorProxyPort),
                                                         escapedDeviceName,
                                                         escapedAppName]];
 }
 
+static NSURL *getAttachDeviceUrl(NSURL *bundleURL, NSString *title)
+{
+  NSNumber *metroBundlerPort = @8081;
+  NSString *escapedDeviceName = [[[UIDevice currentDevice] name] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
+  NSString *escapedAppName = [[[NSBundle mainBundle] bundleIdentifier] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
+  return [NSURL URLWithString:[NSString stringWithFormat:@"http://%@/attach-debugger-nuclide?title=%@&device=%@&app=%@",
+                               getServerHost(bundleURL, metroBundlerPort),
+                               title,
+                               escapedDeviceName,
+                               escapedAppName]];
+}
 
 @implementation RCTInspectorDevServerHelper
 
@@ -54,6 +64,41 @@ static void sendEventToAllConnections(NSString *event)
   }
 }
 
+static void displayErrorAlert(UIViewController *view, NSString *message) {
+  UIAlertController *alert =
+      [UIAlertController alertControllerWithTitle:nil
+                                          message:message
+                                   preferredStyle:UIAlertControllerStyleAlert];
+  [view presentViewController:alert animated:YES completion:nil];
+  dispatch_after(
+      dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 2.5),
+      dispatch_get_main_queue(),
+      ^{
+        [alert dismissViewControllerAnimated:YES completion:nil];
+      });
+}
+
++ (void)attachDebugger:(NSString *)owner
+         withBundleURL:(NSURL *)bundleURL
+              withView:(UIViewController *)view
+{
+  NSURL *url = getAttachDeviceUrl(bundleURL, owner);
+
+  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
+  [request setHTTPMethod:@"GET"];
+
+  __weak UIViewController *viewCapture = view;
+  [[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:
+    ^(NSData *_Nullable data,
+      NSURLResponse *_Nullable response,
+      NSError *_Nullable error) {
+      UIViewController *viewCaptureStrong = viewCapture;
+      if (error != nullptr && viewCaptureStrong != nullptr) {
+        displayErrorAlert(viewCaptureStrong, @"The request to attach Nuclide couldn't reach Metro Bundler!");
+      }
+    }] resume];
+}
+
 + (void)disableDebugger
 {
   sendEventToAllConnections(kDebuggerMsgDisable);

React/Modules/RCTDevSettings.h

@@ -38,6 +38,7 @@
 @property (nonatomic, readonly) BOOL isHotLoadingAvailable;
 @property (nonatomic, readonly) BOOL isLiveReloadAvailable;
 @property (nonatomic, readonly) BOOL isRemoteDebuggingAvailable;
+@property (nonatomic, readonly) BOOL isNuclideDebuggingAvailable;
 @property (nonatomic, readonly) BOOL isJSCSamplingProfilerAvailable;
 
 /**

React/Modules/RCTDevSettings.mm

@@ -252,6 +252,15 @@ - (id)settingForKey:(NSString *)key
   return [_dataSource settingForKey:key];
 }
 
+- (BOOL)isNuclideDebuggingAvailable
+{
+#if RCT_ENABLE_INSPECTOR
+  return true;
+#else
+  return false;
+#endif //RCT_ENABLE_INSPECTOR
+}
+
 - (BOOL)isRemoteDebuggingAvailable
 {
   Class jsDebuggingExecutorClass = objc_lookUpClass("RCTWebSocketExecutor");