[🐛] Enable Firebase Analytics DebugView for TestFlight builds

[thibaultcapelli]

Issue

I want to test my analytics integration from TestFlight but the flag "-FIRDebugEnabled" does not take effect in release builds.
I tested to add the flag from the AppDelegate code without any success.

iOS

AppDelegate.m:

    NSProcessInfo *processInfo = [NSProcessInfo processInfo];
    NSArray *arguments = [processInfo arguments];
    NSMutableArray *newArguments = [NSMutableArray arrayWithArray:arguments];

    [newArguments addObject:@"-FIRDebugEnabled"];

    [[NSProcessInfo processInfo] setValue:[newArguments copy] forKey:@"arguments"];

[thibaultcapelli]

My solution is finally to copy the source code and toggle the service with react-native-config

AppDelegate.m:

New imports:

  #import <GoogleUtilities/GULLogger.h>
  #import "RNCConfig.h"

didFinishLaunchingWithOptions code:

  NSString *firebaseDebugMode = [RNCConfig envFor:@"FIREBASE_DEBUG_MODE"];
  
  if (firebaseDebugMode != nil && [firebaseDebugMode isEqualToString:@"enabled"]) {
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"/google/measurement/debug_mode"];
    GULLoggerForceDebug();
  }
  
  [FIRApp configure];