Restore Firebase.h to pre-6.28.0 style (#6367)

* Restore Firebase.h now that SPM supports same public header path as CocoaPods

CoreOnly/Sources/Firebase.h

@@ -12,45 +12,30 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// The module qualified imports are for CocoaPods and the simple file names
-// for Swift Package Manager.
+#import <FirebaseCore/FirebaseCore.h>
 
 #if !defined(__has_include)
   #error "Firebase.h won't import anything if your compiler doesn't support __has_include. Please \
           import the headers individually."
 #else
-  #if __has_include(<FirebaseCore/FirebaseCore.h>)
-    #import <FirebaseCore/FirebaseCore.h>
-  #elif __has_include("FirebaseCore.h")
-    #import "FirebaseCore.h"
-  #endif
-
   #if __has_include(<FirebaseAnalytics/FirebaseAnalytics.h>)
     #import <FirebaseAnalytics/FirebaseAnalytics.h>
   #endif
 
-  #if __has_include(<FirebaseAuth/FirebaseAuth.h>)
-    #import <FirebaseAuth/FirebaseAuth.h>
-  #elif __has_include("FirebaseAuth.h")
-    #import "FirebaseAuth.h"
-  #endif
-
   #if __has_include(<FirebaseAppDistribution/FirebaseAppDistribution.h>)
     #import <FirebaseAppDistribution/FirebaseAppDistribution.h>
-  #elif  __has_include("FirebaseAppDistribution.h")
-    #import "FirebaseAppDistribution.h"
+  #endif
+
+  #if __has_include(<FirebaseAuth/FirebaseAuth.h>)
+    #import <FirebaseAuth/FirebaseAuth.h>
   #endif
 
   #if __has_include(<FirebaseCrashlytics/FirebaseCrashlytics.h>)
     #import <FirebaseCrashlytics/FirebaseCrashlytics.h>
-  #elif  __has_include("FirebaseCrashlytics.h")
-    #import "FirebaseCrashlytics.h"
   #endif
 
   #if __has_include(<FirebaseDatabase/FirebaseDatabase.h>)
     #import <FirebaseDatabase/FirebaseDatabase.h>
-  #elif __has_include("FirebaseDatabase.h")
-    #import "FirebaseDatabase.h"
   #endif
 
   #if __has_include(<FirebaseDynamicLinks/FirebaseDynamicLinks.h>)
@@ -62,20 +47,14 @@
 Firebase Dynamic Links works as intended."
       #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
     #endif
-  #elif __has_include("FirebaseDynamicLinks.h")
-    #import "FirebaseDynamicLinks.h"
   #endif
 
   #if __has_include(<FirebaseFirestore/FirebaseFirestore.h>)
     #import <FirebaseFirestore/FirebaseFirestore.h>
-  #elif __has_include("FirebaseFirestore.h")
-    #import "FirebaseFirestore.h"
   #endif
 
   #if __has_include(<FirebaseFunctions/FirebaseFunctions.h>)
     #import <FirebaseFunctions/FirebaseFunctions.h>
-  #elif __has_include("FirebaseFunctions.h")
-    #import "FirebaseFunctions.h"
   #endif
 
   #if __has_include(<FirebaseInAppMessaging/FirebaseInAppMessaging.h>)
@@ -87,8 +66,6 @@ Firebase Dynamic Links works as intended."
 Firebase In App Messaging works as intended."
       #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
     #endif
-  #elif __has_include("FirebaseInAppMessaging.h")
-    #import "FirebaseInAppMessaging.h"
   #endif
 
   #if __has_include(<FirebaseInstanceID/FirebaseInstanceID.h>)
@@ -104,8 +81,6 @@ Firebase In App Messaging works as intended."
 Firebase Messaging works as intended."
       #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
     #endif
-  #elif __has_include("FirebaseMessaging.h")
-    #import "FirebaseMessaging.h"
   #endif
 
   #if __has_include(<FirebaseMLCommon/FirebaseMLCommon.h>)
@@ -180,14 +155,10 @@ Firebase Performance works as intended."
 Firebase Remote Config works as intended."
       #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
     #endif
-  #elif __has_include("FirebaseRemoteConfig.h")
-    #import "FirebaseRemoteConfig.h"
   #endif
 
   #if __has_include(<FirebaseStorage/FirebaseStorage.h>)
     #import <FirebaseStorage/FirebaseStorage.h>
-  #elif __has_include("FirebaseStorage.h")
-    #import "FirebaseStorage.h"
   #endif
 
   #if __has_include(<GoogleMobileAds/GoogleMobileAds.h>)

FirebaseCore/CHANGELOG.md

@@ -1,3 +1,7 @@
+# Unreleased
+- [fixed] Sporadic missing FirebaseApp symbol build issue introduced in Firebase 6.28.0. (#6341)
+
+
 # v6.10.1 -- M78
 - [added] Beta release of Swift Package Manager. Details
   [here](https://github.com/firebase/firebase-ios-sdk/blob/master/SwiftPackageManager.md). (#3136)