firebase log level

Pods/FirebaseCore/FirebaseCore/Extension/FIRAppInternal.h

@@ -0,0 +1,156 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <FirebaseCore/FIRApp.h>
+
+@class FIRComponentContainer;
+@class FIRHeartbeatLogger;
+@protocol FIRLibrary;
+
+/**
+ * The internal interface to `FirebaseApp`. This is meant for first-party integrators, who need to
+ * receive `FirebaseApp` notifications, log info about the success or failure of their
+ * configuration, and access other internal functionality of `FirebaseApp`.
+ */
+NS_ASSUME_NONNULL_BEGIN
+
+typedef NS_ENUM(NSInteger, FIRConfigType) {
+  FIRConfigTypeCore = 1,
+  FIRConfigTypeSDK = 2,
+};
+
+extern NSString *const kFIRDefaultAppName;
+extern NSString *const kFIRAppReadyToConfigureSDKNotification;
+extern NSString *const kFIRAppDeleteNotification;
+extern NSString *const kFIRAppIsDefaultAppKey;
+extern NSString *const kFIRAppNameKey;
+extern NSString *const kFIRGoogleAppIDKey;
+extern NSString *const kFirebaseCoreErrorDomain;
+
+/**
+ * The format string for the `UserDefaults` key used for storing the data collection enabled flag.
+ * This includes formatting to append the `FirebaseApp`'s name.
+ */
+extern NSString *const kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat;
+
+/**
+ * The plist key used for storing the data collection enabled flag.
+ */
+extern NSString *const kFIRGlobalAppDataCollectionEnabledPlistKey;
+
+/** @var FirebaseAuthStateDidChangeInternalNotification
+ @brief The name of the @c NotificationCenter notification which is posted when the auth state
+ changes (e.g. a new token has been produced, a user logs in or out). The object parameter of
+ the notification is a dictionary possibly containing the key:
+ @c FirebaseAuthStateDidChangeInternalNotificationTokenKey (the new access token.) If it does not
+ contain this key it indicates a sign-out event took place.
+ */
+extern NSString *const FIRAuthStateDidChangeInternalNotification;
+
+/** @var FirebaseAuthStateDidChangeInternalNotificationTokenKey
+ @brief A key present in the dictionary object parameter of the
+ @c FirebaseAuthStateDidChangeInternalNotification notification. The value associated with this
+ key will contain the new access token.
+ */
+extern NSString *const FIRAuthStateDidChangeInternalNotificationTokenKey;
+
+/** @var FirebaseAuthStateDidChangeInternalNotificationAppKey
+ @brief A key present in the dictionary object parameter of the
+ @c FirebaseAuthStateDidChangeInternalNotification notification. The value associated with this
+ key will contain the FirebaseApp associated with the auth instance.
+ */
+extern NSString *const FIRAuthStateDidChangeInternalNotificationAppKey;
+
+/** @var FirebaseAuthStateDidChangeInternalNotificationUIDKey
+ @brief A key present in the dictionary object parameter of the
+ @c FirebaseAuthStateDidChangeInternalNotification notification. The value associated with this
+ key will contain the new user's UID (or nil if there is no longer a user signed in).
+ */
+extern NSString *const FIRAuthStateDidChangeInternalNotificationUIDKey;
+
+@interface FIRApp ()
+
+/**
+ * A flag indicating if this is the default app (has the default app name).
+ */
+@property(nonatomic, readonly) BOOL isDefaultApp;
+
+/**
+ * The container of interop SDKs for this app.
+ */
+@property(nonatomic) FIRComponentContainer *container;
+
+/**
+ * The heartbeat logger associated with this app.
+ *
+ * Firebase apps have a 1:1 relationship with heartbeat loggers.
+ */
+@property(readonly) FIRHeartbeatLogger *heartbeatLogger;
+
+/**
+ * Checks if the default app is configured without trying to configure it.
+ */
++ (BOOL)isDefaultAppConfigured;
+
+/**
+ * Registers a given third-party library with the given version number to be reported for
+ * analytics.
+ *
+ * @param name Name of the library.
+ * @param version Version of the library.
+ */
++ (void)registerLibrary:(nonnull NSString *)name withVersion:(nonnull NSString *)version;
+
+/**
+ * Registers a given internal library to be reported for analytics.
+ *
+ * @param library Optional parameter for component registration.
+ * @param name Name of the library.
+ */
++ (void)registerInternalLibrary:(nonnull Class<FIRLibrary>)library
+                       withName:(nonnull NSString *)name;
+
+/**
+ * Registers a given internal library with the given version number to be reported for
+ * analytics. This should only be used for non-Firebase libraries that have their own versioning
+ * scheme.
+ *
+ * @param library Optional parameter for component registration.
+ * @param name Name of the library.
+ * @param version Version of the library.
+ */
++ (void)registerInternalLibrary:(nonnull Class<FIRLibrary>)library
+                       withName:(nonnull NSString *)name
+                    withVersion:(nonnull NSString *)version;
+
+/**
+ * A concatenated string representing all the third-party libraries and version numbers.
+ */
++ (NSString *)firebaseUserAgent;
+
+/**
+ * Can be used by the unit tests in each SDK to reset `FirebaseApp`. This method is thread unsafe.
+ */
++ (void)resetApps;
+
+/**
+ * Can be used by the unit tests in each SDK to set customized options.
+ */
+- (instancetype)initInstanceWithName:(NSString *)name options:(FIROptions *)options;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Extension/FIRComponent.h

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIRApp;
+@class FIRComponentContainer;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Provides a system to clean up cached instances returned from the component system.
+NS_SWIFT_NAME(ComponentLifecycleMaintainer)
+@protocol FIRComponentLifecycleMaintainer
+/// The associated app will be deleted, clean up any resources as they are about to be deallocated.
+- (void)appWillBeDeleted:(FIRApp *)app;
+@end
+
+typedef _Nullable id (^FIRComponentCreationBlock)(FIRComponentContainer *container,
+                                                  BOOL *isCacheable)
+    NS_SWIFT_NAME(ComponentCreationBlock);
+
+/// Describes the timing of instantiation. Note: new components should default to lazy unless there
+/// is a strong reason to be eager.
+typedef NS_ENUM(NSInteger, FIRInstantiationTiming) {
+  FIRInstantiationTimingLazy,
+  FIRInstantiationTimingAlwaysEager,
+  FIRInstantiationTimingEagerInDefaultApp
+} NS_SWIFT_NAME(InstantiationTiming);
+
+/// A component that can be used from other Firebase SDKs.
+NS_SWIFT_NAME(Component)
+@interface FIRComponent : NSObject
+
+/// The protocol describing functionality provided from the `Component`.
+@property(nonatomic, strong, readonly) Protocol *protocol;
+
+/// The timing of instantiation.
+@property(nonatomic, readonly) FIRInstantiationTiming instantiationTiming;
+
+/// A block to instantiate an instance of the component with the appropriate dependencies.
+@property(nonatomic, copy, readonly) FIRComponentCreationBlock creationBlock;
+
+// There's an issue with long NS_SWIFT_NAMES that causes compilation to fail, disable clang-format
+// for the next two methods.
+// clang-format off
+
+/// Creates a component with no dependencies that will be lazily initialized.
++ (instancetype)componentWithProtocol:(Protocol *)protocol
+                        creationBlock:(FIRComponentCreationBlock)creationBlock
+NS_SWIFT_NAME(init(_:creationBlock:));
+
+/// Creates a component to be registered with the component container.
+///
+/// @param protocol - The protocol describing functionality provided by the component.
+/// @param instantiationTiming - When the component should be initialized. Use .lazy unless there's
+///                              a good reason to be instantiated earlier.
+/// @param creationBlock - A block to instantiate the component with a container, and if
+/// @return A component that can be registered with the component container.
++ (instancetype)componentWithProtocol:(Protocol *)protocol
+                  instantiationTiming:(FIRInstantiationTiming)instantiationTiming
+                        creationBlock:(FIRComponentCreationBlock)creationBlock
+NS_SWIFT_NAME(init(_:instantiationTiming:creationBlock:));
+
+// clang-format on
+
+/// Unavailable.
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Extension/FIRComponentContainer.h

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+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// A type-safe macro to retrieve a component from a container. This should be used to retrieve
+/// components instead of using the container directly.
+#define FIR_COMPONENT(type, container) \
+  [FIRComponentType<id<type>> instanceForProtocol:@protocol(type) inContainer:container]
+
+@class FIRApp;
+
+/// A container that holds different components that are registered via the
+/// `registerAsComponentRegistrant` call. These classes should conform to `ComponentRegistrant`
+/// in order to properly register components for Core.
+NS_SWIFT_NAME(FirebaseComponentContainer)
+@interface FIRComponentContainer : NSObject
+
+/// A weak reference to the app that an instance of the container belongs to.
+@property(nonatomic, weak, readonly) FIRApp *app;
+
+// TODO: See if we can get improved type safety here.
+/// A Swift only API for fetching an instance since the top macro isn't available.
+- (nullable id)__instanceForProtocol:(Protocol *)protocol NS_SWIFT_NAME(instance(for:));
+
+/// Unavailable. Use the `container` property on `FirebaseApp`.
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Extension/FIRComponentType.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIRComponentContainer;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Do not use directly. A placeholder type in order to provide a macro that will warn users of
+/// mis-matched protocols.
+NS_SWIFT_NAME(ComponentType)
+@interface FIRComponentType<__covariant T> : NSObject
+
+/// Do not use directly. A factory method to retrieve an instance that provides a specific
+/// functionality.
++ (nullable T)instanceForProtocol:(Protocol *)protocol
+                      inContainer:(FIRComponentContainer *)container;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Extension/FIRHeartbeatLogger.h

@@ -0,0 +1,90 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+#ifndef FIREBASE_BUILD_CMAKE
+@class FIRHeartbeatsPayload;
+#endif  // FIREBASE_BUILD_CMAKE
+
+/// Enum representing different daily heartbeat codes.
+/// This enum is only used by clients using platform logging V1. This is because
+/// the V1 payload only supports a single daily heartbeat.
+typedef NS_ENUM(NSInteger, FIRDailyHeartbeatCode) {
+  /// Represents the absence of a daily heartbeat.
+  FIRDailyHeartbeatCodeNone = 0,
+  /// Represents the presence of a daily heartbeat.
+  FIRDailyHeartbeatCodeSome = 2,
+};
+
+@protocol FIRHeartbeatLoggerProtocol <NSObject>
+
+/// Asynchronously logs a heartbeat.
+- (void)log;
+
+#ifndef FIREBASE_BUILD_CMAKE
+/// Return the headerValue for the HeartbeatLogger.
+- (NSString *_Nullable)headerValue;
+#endif  // FIREBASE_BUILD_CMAKE
+
+/// Gets the heartbeat code for today.
+- (FIRDailyHeartbeatCode)heartbeatCodeForToday;
+
+@end
+
+#ifndef FIREBASE_BUILD_CMAKE
+/// Returns a nullable string header value from a given heartbeats payload.
+///
+/// This API returns `nil` when the given heartbeats payload is considered empty.
+///
+/// @param heartbeatsPayload The heartbeats payload.
+NSString *_Nullable FIRHeaderValueFromHeartbeatsPayload(FIRHeartbeatsPayload *heartbeatsPayload);
+#endif  // FIREBASE_BUILD_CMAKE
+
+/// A thread safe, synchronized object that logs and flushes platform logging info.
+@interface FIRHeartbeatLogger : NSObject <FIRHeartbeatLoggerProtocol>
+
+/// Designated initializer.
+///
+/// @param appID The app ID that this heartbeat logger corresponds to.
+- (instancetype)initWithAppID:(NSString *)appID;
+
+/// Asynchronously logs a new heartbeat corresponding to the Firebase User Agent, if needed.
+///
+/// @note This API is thread-safe.
+- (void)log;
+
+#ifndef FIREBASE_BUILD_CMAKE
+/// Flushes heartbeats from storage into a structured payload of heartbeats.
+///
+/// This API is for clients using platform logging V2.
+///
+/// @note This API is thread-safe.
+/// @return A payload of heartbeats.
+- (FIRHeartbeatsPayload *)flushHeartbeatsIntoPayload;
+#endif  // FIREBASE_BUILD_CMAKE
+
+/// Gets today's corresponding heartbeat code.
+///
+/// This API is for clients using platform logging V1.
+///
+/// @note This API is thread-safe.
+/// @return Heartbeat code indicating whether or not there is an unsent global heartbeat.
+- (FIRDailyHeartbeatCode)heartbeatCodeForToday;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Extension/FIRLibrary.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FIRLibrary_h
+#define FIRLibrary_h
+
+#import <Foundation/Foundation.h>
+
+@class FIRApp;
+@class FIRComponent;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Provide an interface to register a library for userAgent logging and availability to others.
+NS_SWIFT_NAME(Library)
+@protocol FIRLibrary
+
+/// Returns one or more Components that will be registered in
+/// FirebaseApp and participate in dependency resolution and injection.
++ (NSArray<FIRComponent *> *)componentsToRegister;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* FIRLibrary_h */

Pods/FirebaseCore/FirebaseCore/Extension/FIRLogger.h

@@ -0,0 +1,148 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import <FirebaseCore/FIRLoggerLevel.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * The Firebase services used in Firebase logger.
+ */
+typedef NSString *const FIRLoggerService;
+
+extern NSString *const kFIRLoggerAnalytics;
+extern NSString *const kFIRLoggerCrash;
+extern NSString *const kFIRLoggerCore;
+extern NSString *const kFIRLoggerRemoteConfig;
+
+/**
+ * The key used to store the logger's error count.
+ */
+extern NSString *const kFIRLoggerErrorCountKey;
+
+/**
+ * The key used to store the logger's warning count.
+ */
+extern NSString *const kFIRLoggerWarningCountKey;
+
+#ifdef __cplusplus
+extern "C" {
+#endif  // __cplusplus
+
+/**
+ * Enables or disables Analytics debug mode.
+ * If set to true, the logging level for Analytics will be set to FirebaseLoggerLevelDebug.
+ * Enabling the debug mode has no effect if the app is running from App Store.
+ * (required) analytics debug mode flag.
+ */
+void FIRSetAnalyticsDebugMode(BOOL analyticsDebugMode);
+
+/**
+ * Gets the current FIRLoggerLevel.
+ */
+FIRLoggerLevel FIRGetLoggerLevel(void);
+
+/**
+ * Changes the default logging level of FirebaseLoggerLevelNotice to a user-specified level.
+ * The default level cannot be set above FirebaseLoggerLevelNotice if the app is running from App
+ * Store. (required) log level (one of the FirebaseLoggerLevel enum values).
+ */
+void FIRSetLoggerLevel(FIRLoggerLevel loggerLevel);
+
+/**
+ * Checks if the specified logger level is loggable given the current settings.
+ * (required) log level (one of the FirebaseLoggerLevel enum values).
+ * (required) whether or not this function is called from the Analytics component.
+ */
+BOOL FIRIsLoggableLevel(FIRLoggerLevel loggerLevel, BOOL analyticsComponent);
+
+/**
+ * Logs a message to the Xcode console and the device log. If running from AppStore, will
+ * not log any messages with a level higher than FirebaseLoggerLevelNotice to avoid log spamming.
+ * (required) log level (one of the FirebaseLoggerLevel enum values).
+ * (required) service name of type FirebaseLoggerService.
+ * (required) message code starting with "I-" which means iOS, followed by a capitalized
+ *            three-character service identifier and a six digit integer message ID that is unique
+ *            within the service.
+ *            An example of the message code is @"I-COR000001".
+ * (required) message string which can be a format string.
+ * (optional) variable arguments list obtained from calling va_start, used when message is a format
+ *            string.
+ */
+extern void FIRLogBasic(FIRLoggerLevel level,
+                        NSString *category,
+                        NSString *messageCode,
+                        NSString *message,
+// On 64-bit simulators, va_list is not a pointer, so cannot be marked nullable
+// See: http://stackoverflow.com/q/29095469
+#if __LP64__ && TARGET_OS_SIMULATOR || TARGET_OS_OSX
+                        va_list args_ptr
+#else
+                        va_list _Nullable args_ptr
+#endif
+);
+
+/**
+ * The following functions accept the following parameters in order:
+ * (required) service name of type FirebaseLoggerService.
+ * (required) message code starting from "I-" which means iOS, followed by a capitalized
+ *            three-character service identifier and a six digit integer message ID that is unique
+ *            within the service.
+ *            An example of the message code is @"I-COR000001".
+ *            See go/firebase-log-proposal for details.
+ * (required) message string which can be a format string.
+ * (optional) the list of arguments to substitute into the format string.
+ * Example usage:
+ * FirebaseLogError(kFirebaseLoggerCore, @"I-COR000001", @"Configuration of %@ failed.", app.name);
+ */
+extern void FIRLogError(NSString *category, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+extern void FIRLogWarning(NSString *category, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+extern void FIRLogNotice(NSString *category, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+extern void FIRLogInfo(NSString *category, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+extern void FIRLogDebug(NSString *category, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif  // __cplusplus
+
+NS_SWIFT_NAME(FirebaseLogger)
+@interface FIRLoggerWrapper : NSObject
+
+/// Logs a given message at a given log level.
+///
+/// - Parameters:
+///   - level: The log level to use (defined by `FirebaseLoggerLevel` enum values).
+///   - service: The service name of type `FirebaseLoggerService`.
+///   - code: The message code. Starting with "I-" which means iOS, followed by a capitalized
+///   three-character service identifier and a six digit integer message ID that is unique within
+///   the service. An example of the message code is @"I-COR000001".
+///   - message: Formatted string to be used as the log's message.
++ (void)logWithLevel:(FIRLoggerLevel)level
+             service:(NSString *)category
+                code:(NSString *)code
+             message:(NSString *)message
+    __attribute__((__swift_name__("log(level:service:code:message:)")));
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Extension/FIROptionsInternal.h

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <FirebaseCore/FIROptions.h>
+
+/**
+ * Keys for the strings in the plist file.
+ */
+extern NSString *const kFIRAPIKey;
+extern NSString *const kFIRTrackingID;
+extern NSString *const kFIRGoogleAppID;
+extern NSString *const kFIRClientID;
+extern NSString *const kFIRGCMSenderID;
+extern NSString *const kFIRAndroidClientID;
+extern NSString *const kFIRDatabaseURL;
+extern NSString *const kFIRStorageBucket;
+extern NSString *const kFIRBundleID;
+extern NSString *const kFIRProjectID;
+
+/**
+ * Keys for the plist file name
+ */
+extern NSString *const kServiceInfoFileName;
+
+extern NSString *const kServiceInfoFileType;
+
+/**
+ * This header file exposes the initialization of FirebaseOptions to internal use.
+ */
+@interface FIROptions ()
+
+/**
+ * `resetDefaultOptions` and `initInternalWithOptionsDictionary` are exposed only for unit tests.
+ */
++ (void)resetDefaultOptions;
+
+/**
+ * Initializes the options with dictionary. The above strings are the keys of the dictionary.
+ * This is the designated initializer.
+ */
+- (instancetype)initInternalWithOptionsDictionary:(NSDictionary *)serviceInfoDictionary
+    NS_DESIGNATED_INITIALIZER;
+
+/**
+ * `defaultOptions` and `defaultOptionsDictionary` are exposed in order to be used in FirebaseApp
+ * and other first party services.
+ */
++ (FIROptions *)defaultOptions;
+
++ (NSDictionary *)defaultOptionsDictionary;
+
+/**
+ * Indicates whether or not Analytics collection was explicitly enabled via a plist flag or at
+ * runtime.
+ */
+@property(nonatomic, readonly) BOOL isAnalyticsCollectionExplicitlySet;
+
+/**
+ * Whether or not Analytics Collection was enabled. Analytics Collection is enabled unless
+ * explicitly disabled in GoogleService-Info.plist.
+ */
+@property(nonatomic, readonly) BOOL isAnalyticsCollectionEnabled;
+
+/**
+ * Whether or not Analytics Collection was completely disabled. If true, then
+ * isAnalyticsCollectionEnabled will be false.
+ */
+@property(nonatomic, readonly) BOOL isAnalyticsCollectionDeactivated;
+
+/**
+ * The version ID of the client library, e.g. @"1100000".
+ */
+@property(nonatomic, readonly, copy) NSString *libraryVersionID;
+
+/**
+ * The flag indicating whether this object was constructed with the values in the default plist
+ * file.
+ */
+@property(nonatomic) BOOL usingOptionsFromDefaultPlist;
+
+/**
+ * Whether or not Measurement was enabled. Measurement is enabled unless explicitly disabled in
+ * GoogleService-Info.plist.
+ */
+@property(nonatomic, readonly) BOOL isMeasurementEnabled;
+
+/**
+ * Whether or not editing is locked. This should occur after `FirebaseOptions` has been set on a
+ * `FirebaseApp`.
+ */
+@property(nonatomic, getter=isEditingLocked) BOOL editingLocked;
+
+@end

Pods/FirebaseCore/FirebaseCore/Extension/FirebaseCoreInternal.h

@@ -0,0 +1,24 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+@import FirebaseCore;
+
+#import "FIRAppInternal.h"
+#import "FIRComponent.h"
+#import "FIRComponentContainer.h"
+#import "FIRComponentType.h"
+#import "FIRHeartbeatLogger.h"
+#import "FIRLibrary.h"
+#import "FIRLogger.h"
+#import "FIROptionsInternal.h"

Pods/FirebaseCore/FirebaseCore/Sources/FIRAnalyticsConfiguration.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/// Values stored in analyticsEnabledState. Never alter these constants since they must match with
+/// values persisted to disk.
+typedef NS_ENUM(int64_t, FIRAnalyticsEnabledState) {
+  // 0 is the default value for keys not found stored in persisted config, so it cannot represent
+  // kFIRAnalyticsEnabledStateSetNo. It must represent kFIRAnalyticsEnabledStateNotSet.
+  kFIRAnalyticsEnabledStateNotSet = 0,
+  kFIRAnalyticsEnabledStateSetYes = 1,
+  kFIRAnalyticsEnabledStateSetNo = 2,
+};
+
+/// The user defaults key for the persisted measurementEnabledState value. FIRAPersistedConfig reads
+/// measurementEnabledState using this same key.
+static NSString *const kFIRAPersistedConfigMeasurementEnabledStateKey =
+    @"/google/measurement/measurement_enabled_state";
+
+static NSString *const kFIRAnalyticsConfigurationSetEnabledNotification =
+    @"FIRAnalyticsConfigurationSetEnabledNotification";
+static NSString *const kFIRAnalyticsConfigurationSetMinimumSessionIntervalNotification =
+    @"FIRAnalyticsConfigurationSetMinimumSessionIntervalNotification";
+static NSString *const kFIRAnalyticsConfigurationSetSessionTimeoutIntervalNotification =
+    @"FIRAnalyticsConfigurationSetSessionTimeoutIntervalNotification";
+
+@interface FIRAnalyticsConfiguration : NSObject
+
+/// Returns the shared instance of FIRAnalyticsConfiguration.
++ (FIRAnalyticsConfiguration *)sharedInstance;
+
+// Sets whether analytics collection is enabled for this app on this device. This setting is
+// persisted across app sessions. By default it is enabled.
+- (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled;
+
+/// Sets whether analytics collection is enabled for this app on this device, and a flag to persist
+/// the value or not. The setting should not be persisted if being set by the global data collection
+/// flag.
+- (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled
+                       persistSetting:(BOOL)shouldPersist;
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRAnalyticsConfiguration.m

@@ -0,0 +1,62 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+
+#import "FirebaseCore/Sources/FIRAnalyticsConfiguration.h"
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
+@implementation FIRAnalyticsConfiguration
+#pragma clang diagnostic pop
+
++ (FIRAnalyticsConfiguration *)sharedInstance {
+  static FIRAnalyticsConfiguration *sharedInstance = nil;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    sharedInstance = [[FIRAnalyticsConfiguration alloc] init];
+  });
+  return sharedInstance;
+}
+
+- (void)postNotificationName:(NSString *)name value:(id)value {
+  if (!name.length || !value) {
+    return;
+  }
+  [[NSNotificationCenter defaultCenter] postNotificationName:name
+                                                      object:self
+                                                    userInfo:@{name : value}];
+}
+
+- (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled {
+  [self setAnalyticsCollectionEnabled:analyticsCollectionEnabled persistSetting:YES];
+}
+
+- (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled
+                       persistSetting:(BOOL)shouldPersist {
+  // Persist the measurementEnabledState. Use FIRAnalyticsEnabledState values instead of YES/NO.
+  FIRAnalyticsEnabledState analyticsEnabledState =
+      analyticsCollectionEnabled ? kFIRAnalyticsEnabledStateSetYes : kFIRAnalyticsEnabledStateSetNo;
+  if (shouldPersist) {
+    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
+    [userDefaults setObject:@(analyticsEnabledState)
+                     forKey:kFIRAPersistedConfigMeasurementEnabledStateKey];
+    [userDefaults synchronize];
+  }
+
+  [self postNotificationName:kFIRAnalyticsConfigurationSetEnabledNotification
+                       value:@(analyticsCollectionEnabled)];
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRApp.m

@@ -0,0 +1,896 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <sys/utsname.h>
+
+#if __has_include(<UIKit/UIKit.h>)
+#import <UIKit/UIKit.h>
+#endif
+
+#if __has_include(<AppKit/AppKit.h>)
+#import <AppKit/AppKit.h>
+#endif
+
+#if __has_include(<WatchKit/WatchKit.h>)
+#import <WatchKit/WatchKit.h>
+#endif
+
+#import "FirebaseCore/Sources/Public/FirebaseCore/FIRApp.h"
+
+#import "FirebaseCore/Sources/FIRAnalyticsConfiguration.h"
+#import "FirebaseCore/Sources/FIRBundleUtil.h"
+#import "FirebaseCore/Sources/FIRComponentContainerInternal.h"
+#import "FirebaseCore/Sources/FIRConfigurationInternal.h"
+#import "FirebaseCore/Sources/FIRFirebaseUserAgent.h"
+
+#import "FirebaseCore/Extension/FIRAppInternal.h"
+#import "FirebaseCore/Extension/FIRHeartbeatLogger.h"
+#import "FirebaseCore/Extension/FIRLibrary.h"
+#import "FirebaseCore/Extension/FIRLogger.h"
+#import "FirebaseCore/Extension/FIROptionsInternal.h"
+#import "FirebaseCore/Sources/Public/FirebaseCore/FIRVersion.h"
+
+#import <GoogleUtilities/GULAppEnvironmentUtil.h>
+
+#import <objc/runtime.h>
+
+NSString *const kFIRDefaultAppName = @"__FIRAPP_DEFAULT";
+NSString *const kFIRAppReadyToConfigureSDKNotification = @"FIRAppReadyToConfigureSDKNotification";
+NSString *const kFIRAppDeleteNotification = @"FIRAppDeleteNotification";
+NSString *const kFIRAppIsDefaultAppKey = @"FIRAppIsDefaultAppKey";
+NSString *const kFIRAppNameKey = @"FIRAppNameKey";
+NSString *const kFIRGoogleAppIDKey = @"FIRGoogleAppIDKey";
+
+NSString *const kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat =
+    @"/google/firebase/global_data_collection_enabled:%@";
+NSString *const kFIRGlobalAppDataCollectionEnabledPlistKey =
+    @"FirebaseDataCollectionDefaultEnabled";
+
+NSString *const kFIRAppDiagnosticsConfigurationTypeKey = @"ConfigType";
+NSString *const kFIRAppDiagnosticsErrorKey = @"Error";
+NSString *const kFIRAppDiagnosticsFIRAppKey = @"FIRApp";
+NSString *const kFIRAppDiagnosticsSDKNameKey = @"SDKName";
+NSString *const kFIRAppDiagnosticsSDKVersionKey = @"SDKVersion";
+NSString *const kFIRAppDiagnosticsApplePlatformPrefix = @"apple-platform";
+
+// Auth internal notification notification and key.
+NSString *const FIRAuthStateDidChangeInternalNotification =
+    @"FIRAuthStateDidChangeInternalNotification";
+NSString *const FIRAuthStateDidChangeInternalNotificationAppKey =
+    @"FIRAuthStateDidChangeInternalNotificationAppKey";
+NSString *const FIRAuthStateDidChangeInternalNotificationTokenKey =
+    @"FIRAuthStateDidChangeInternalNotificationTokenKey";
+NSString *const FIRAuthStateDidChangeInternalNotificationUIDKey =
+    @"FIRAuthStateDidChangeInternalNotificationUIDKey";
+
+/**
+ * Error domain for exceptions and NSError construction.
+ */
+NSString *const kFirebaseCoreErrorDomain = @"com.firebase.core";
+
+/**
+ * The URL to download plist files.
+ */
+static NSString *const kPlistURL = @"https://console.firebase.google.com/";
+
+@interface FIRApp ()
+
+#ifdef DEBUG
+@property(nonatomic) BOOL alreadyOutputDataCollectionFlag;
+#endif  // DEBUG
+
+@end
+
+@implementation FIRApp
+
+// This is necessary since our custom getter prevents `_options` from being created.
+@synthesize options = _options;
+
+static NSMutableDictionary *sAllApps;
+static FIRApp *sDefaultApp;
+
++ (void)configure {
+  FIROptions *options = [FIROptions defaultOptions];
+  if (!options) {
+#if DEBUG
+    [self findMisnamedGoogleServiceInfoPlist];
+#endif  // DEBUG
+    [NSException raise:kFirebaseCoreErrorDomain
+                format:@"`FirebaseApp.configure()` could not find "
+                       @"a valid GoogleService-Info.plist in your project. Please download one "
+                       @"from %@.",
+                       kPlistURL];
+  }
+  [FIRApp configureWithOptions:options];
+}
+
++ (void)configureWithOptions:(FIROptions *)options {
+  if (!options) {
+    [NSException raise:kFirebaseCoreErrorDomain
+                format:@"Options is nil. Please pass a valid options."];
+  }
+  [FIRApp configureWithName:kFIRDefaultAppName options:options];
+}
+
++ (NSCharacterSet *)applicationNameAllowedCharacters {
+  static NSCharacterSet *applicationNameAllowedCharacters;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    NSMutableCharacterSet *allowedNameCharacters = [NSMutableCharacterSet alphanumericCharacterSet];
+    [allowedNameCharacters addCharactersInString:@"-_"];
+    applicationNameAllowedCharacters = [allowedNameCharacters copy];
+  });
+  return applicationNameAllowedCharacters;
+}
+
++ (void)configureWithName:(NSString *)name options:(FIROptions *)options {
+  if (!name || !options) {
+    [NSException raise:kFirebaseCoreErrorDomain format:@"Neither name nor options can be nil."];
+  }
+  if (name.length == 0) {
+    [NSException raise:kFirebaseCoreErrorDomain format:@"Name cannot be empty."];
+  }
+
+  if ([name isEqualToString:kFIRDefaultAppName]) {
+    if (sDefaultApp) {
+      // The default app already exists. Handle duplicate `configure` calls and return.
+      [self appWasConfiguredTwice:sDefaultApp usingOptions:options];
+      return;
+    }
+
+    FIRLogDebug(kFIRLoggerCore, @"I-COR000001", @"Configuring the default app.");
+  } else {
+    // Validate the app name and ensure it hasn't been configured already.
+    NSCharacterSet *nameCharacters = [NSCharacterSet characterSetWithCharactersInString:name];
+
+    if (![[self applicationNameAllowedCharacters] isSupersetOfSet:nameCharacters]) {
+      [NSException raise:kFirebaseCoreErrorDomain
+                  format:@"App name can only contain alphanumeric, "
+                         @"hyphen (-), and underscore (_) characters"];
+    }
+
+    @synchronized(self) {
+      if (sAllApps && sAllApps[name]) {
+        // The app already exists. Handle a duplicate `configure` call and return.
+        [self appWasConfiguredTwice:sAllApps[name] usingOptions:options];
+        return;
+      }
+    }
+
+    FIRLogDebug(kFIRLoggerCore, @"I-COR000002", @"Configuring app named %@", name);
+  }
+
+  // Default instantiation, make sure we populate with Swift SDKs that can't register in time.
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    [self registerSwiftComponents];
+  });
+
+  @synchronized(self) {
+    FIRApp *app = [[FIRApp alloc] initInstanceWithName:name options:options];
+    if (app.isDefaultApp) {
+      sDefaultApp = app;
+    }
+
+    [FIRApp addAppToAppDictionary:app];
+
+    // The FIRApp instance is ready to go, `sDefaultApp` is assigned, other SDKs are now ready to be
+    // instantiated.
+    [app.container instantiateEagerComponents];
+    [FIRApp sendNotificationsToSDKs:app];
+  }
+}
+
+/// Called when `configure` has been called multiple times for the same app. This can either throw
+/// an exception (most cases) or ignore the duplicate configuration in situations where it's allowed
+/// like an extension.
++ (void)appWasConfiguredTwice:(FIRApp *)app usingOptions:(FIROptions *)options {
+  // Only extensions should potentially be able to call `configure` more than once.
+  if (![GULAppEnvironmentUtil isAppExtension]) {
+    // Throw an exception since this is now an invalid state.
+    if (app.isDefaultApp) {
+      [NSException raise:kFirebaseCoreErrorDomain
+                  format:@"Default app has already been configured."];
+    } else {
+      [NSException raise:kFirebaseCoreErrorDomain
+                  format:@"App named %@ has already been configured.", app.name];
+    }
+  }
+
+  // In an extension, the entry point could be called multiple times. As long as the options are
+  // identical we should allow multiple `configure` calls.
+  if ([options isEqual:app.options]) {
+    // Everything is identical but the extension's lifecycle triggered `configure` twice.
+    // Ignore duplicate calls and return since everything should still be in a valid state.
+    FIRLogDebug(kFIRLoggerCore, @"I-COR000035",
+                @"Ignoring second `configure` call in an extension.");
+    return;
+  } else {
+    [NSException raise:kFirebaseCoreErrorDomain
+                format:@"App named %@ has already been configured.", app.name];
+  }
+}
+
++ (FIRApp *)defaultApp {
+  if (sDefaultApp) {
+    return sDefaultApp;
+  }
+  FIRLogError(kFIRLoggerCore, @"I-COR000003",
+              @"The default Firebase app has not yet been "
+              @"configured. Add `FirebaseApp.configure()` to your "
+              @"application initialization. This can be done in "
+              @"in the App Delegate's application(_:didFinishLaunchingWithOptions:)` "
+              @"(or the `@main` struct's initializer in SwiftUI). "
+              @"Read more: "
+              @"https://firebase.google.com/docs/ios/setup#initialize_firebase_in_your_app");
+  return nil;
+}
+
++ (FIRApp *)appNamed:(NSString *)name {
+  @synchronized(self) {
+    if (sAllApps) {
+      FIRApp *app = sAllApps[name];
+      if (app) {
+        return app;
+      }
+    }
+    FIRLogError(kFIRLoggerCore, @"I-COR000004", @"App with name %@ does not exist.", name);
+    return nil;
+  }
+}
+
++ (NSDictionary *)allApps {
+  @synchronized(self) {
+    if (!sAllApps) {
+      FIRLogError(kFIRLoggerCore, @"I-COR000005", @"No app has been configured yet.");
+    }
+    return [sAllApps copy];
+  }
+}
+
+// Public only for tests
++ (void)resetApps {
+  @synchronized(self) {
+    sDefaultApp = nil;
+    [sAllApps removeAllObjects];
+    sAllApps = nil;
+    [[self userAgent] reset];
+  }
+}
+
+- (void)deleteApp:(FIRAppVoidBoolCallback)completion {
+  @synchronized([self class]) {
+    if (sAllApps && sAllApps[self.name]) {
+      FIRLogDebug(kFIRLoggerCore, @"I-COR000006", @"Deleting app named %@", self.name);
+
+      // Remove all registered libraries from the container to avoid creating new instances.
+      [self.container removeAllComponents];
+      // Remove all cached instances from the container before deleting the app.
+      [self.container removeAllCachedInstances];
+
+      [sAllApps removeObjectForKey:self.name];
+      [self clearDataCollectionSwitchFromUserDefaults];
+      if ([self.name isEqualToString:kFIRDefaultAppName]) {
+        sDefaultApp = nil;
+      }
+      NSDictionary *appInfoDict = @{kFIRAppNameKey : self.name};
+      [[NSNotificationCenter defaultCenter] postNotificationName:kFIRAppDeleteNotification
+                                                          object:[self class]
+                                                        userInfo:appInfoDict];
+      completion(YES);
+    } else {
+      FIRLogError(kFIRLoggerCore, @"I-COR000007", @"App does not exist.");
+      completion(NO);
+    }
+  }
+}
+
++ (void)addAppToAppDictionary:(FIRApp *)app {
+  if (!sAllApps) {
+    sAllApps = [NSMutableDictionary dictionary];
+  }
+  if ([app configureCore]) {
+    sAllApps[app.name] = app;
+  } else {
+    [NSException raise:kFirebaseCoreErrorDomain
+                format:@"Configuration fails. It may be caused by an invalid GOOGLE_APP_ID in "
+                       @"GoogleService-Info.plist or set in the customized options."];
+  }
+}
+
+- (instancetype)initInstanceWithName:(NSString *)name options:(FIROptions *)options {
+  self = [super init];
+  if (self) {
+    _name = [name copy];
+    _options = [options copy];
+    _options.editingLocked = YES;
+    _isDefaultApp = [name isEqualToString:kFIRDefaultAppName];
+    _container = [[FIRComponentContainer alloc] initWithApp:self];
+    _heartbeatLogger = [[FIRHeartbeatLogger alloc] initWithAppID:self.options.googleAppID];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
+- (BOOL)configureCore {
+  [self checkExpectedBundleID];
+  if (![self isAppIDValid]) {
+    return NO;
+  }
+
+  // Initialize the Analytics once there is a valid options under default app. Analytics should
+  // always initialize first by itself before the other SDKs.
+  if ([self.name isEqualToString:kFIRDefaultAppName]) {
+    Class firAnalyticsClass = NSClassFromString(@"FIRAnalytics");
+    if (firAnalyticsClass) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wundeclared-selector"
+      SEL startWithConfigurationSelector = @selector(startWithConfiguration:options:);
+#pragma clang diagnostic pop
+      if ([firAnalyticsClass respondsToSelector:startWithConfigurationSelector]) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+        [firAnalyticsClass performSelector:startWithConfigurationSelector
+                                withObject:[FIRConfiguration sharedInstance].analyticsConfiguration
+                                withObject:_options];
+#pragma clang diagnostic pop
+      }
+    }
+  }
+
+  [self subscribeForAppDidBecomeActiveNotifications];
+
+  return YES;
+}
+
+- (FIROptions *)options {
+  return [_options copy];
+}
+
+- (void)setDataCollectionDefaultEnabled:(BOOL)dataCollectionDefaultEnabled {
+#ifdef DEBUG
+  FIRLogDebug(kFIRLoggerCore, @"I-COR000034", @"Explicitly %@ data collection flag.",
+              dataCollectionDefaultEnabled ? @"enabled" : @"disabled");
+  self.alreadyOutputDataCollectionFlag = YES;
+#endif  // DEBUG
+
+  NSString *key =
+      [NSString stringWithFormat:kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat, self.name];
+  [[NSUserDefaults standardUserDefaults] setBool:dataCollectionDefaultEnabled forKey:key];
+
+  // Core also controls the FirebaseAnalytics flag, so check if the Analytics flags are set
+  // within FIROptions and change the Analytics value if necessary. Analytics only works with the
+  // default app, so return if this isn't the default app.
+  if (!self.isDefaultApp) {
+    return;
+  }
+
+  // Check if the Analytics flag is explicitly set. If so, no further actions are necessary.
+  if ([self.options isAnalyticsCollectionExplicitlySet]) {
+    return;
+  }
+
+  // The Analytics flag has not been explicitly set, so update with the value being set.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+  [[FIRAnalyticsConfiguration sharedInstance]
+      setAnalyticsCollectionEnabled:dataCollectionDefaultEnabled
+                     persistSetting:NO];
+#pragma clang diagnostic pop
+}
+
+- (BOOL)isDataCollectionDefaultEnabled {
+  // Check if it's been manually set before in code, and use that as the higher priority value.
+  NSNumber *defaultsObject = [[self class] readDataCollectionSwitchFromUserDefaultsForApp:self];
+  if (defaultsObject != nil) {
+#ifdef DEBUG
+    if (!self.alreadyOutputDataCollectionFlag) {
+      FIRLogDebug(kFIRLoggerCore, @"I-COR000031", @"Data Collection flag is %@ in user defaults.",
+                  [defaultsObject boolValue] ? @"enabled" : @"disabled");
+      self.alreadyOutputDataCollectionFlag = YES;
+    }
+#endif  // DEBUG
+    return [defaultsObject boolValue];
+  }
+
+  // Read the Info.plist to see if the flag is set. If it's not set, it should default to `YES`.
+  // As per the implementation of `readDataCollectionSwitchFromPlist`, it's a cached value and has
+  // no performance impact calling multiple times.
+  NSNumber *collectionEnabledPlistValue = [[self class] readDataCollectionSwitchFromPlist];
+  if (collectionEnabledPlistValue != nil) {
+#ifdef DEBUG
+    if (!self.alreadyOutputDataCollectionFlag) {
+      FIRLogDebug(kFIRLoggerCore, @"I-COR000032", @"Data Collection flag is %@ in plist.",
+                  [collectionEnabledPlistValue boolValue] ? @"enabled" : @"disabled");
+      self.alreadyOutputDataCollectionFlag = YES;
+    }
+#endif  // DEBUG
+    return [collectionEnabledPlistValue boolValue];
+  }
+
+#ifdef DEBUG
+  if (!self.alreadyOutputDataCollectionFlag) {
+    FIRLogDebug(kFIRLoggerCore, @"I-COR000033", @"Data Collection flag is not set.");
+    self.alreadyOutputDataCollectionFlag = YES;
+  }
+#endif  // DEBUG
+  return YES;
+}
+
+#pragma mark - private
+
++ (void)sendNotificationsToSDKs:(FIRApp *)app {
+  // TODO: Remove this notification once all SDKs are registered with `FIRCoreConfigurable`.
+  NSNumber *isDefaultApp = [NSNumber numberWithBool:app.isDefaultApp];
+  NSDictionary *appInfoDict = @{
+    kFIRAppNameKey : app.name,
+    kFIRAppIsDefaultAppKey : isDefaultApp,
+    kFIRGoogleAppIDKey : app.options.googleAppID
+  };
+  [[NSNotificationCenter defaultCenter] postNotificationName:kFIRAppReadyToConfigureSDKNotification
+                                                      object:self
+                                                    userInfo:appInfoDict];
+}
+
++ (NSError *)errorForMissingOptions {
+  NSDictionary *errorDict = @{
+    NSLocalizedDescriptionKey :
+        @"Unable to parse GoogleService-Info.plist in order to configure services.",
+    NSLocalizedRecoverySuggestionErrorKey :
+        @"Check formatting and location of GoogleService-Info.plist."
+  };
+  return [NSError errorWithDomain:kFirebaseCoreErrorDomain code:-100 userInfo:errorDict];
+}
+
++ (NSError *)errorForInvalidAppID {
+  NSDictionary *errorDict = @{
+    NSLocalizedDescriptionKey : @"Unable to validate Google App ID",
+    NSLocalizedRecoverySuggestionErrorKey :
+        @"Check formatting and location of GoogleService-Info.plist or GoogleAppID set in the "
+        @"customized options."
+  };
+  return [NSError errorWithDomain:kFirebaseCoreErrorDomain code:-101 userInfo:errorDict];
+}
+
++ (BOOL)isDefaultAppConfigured {
+  return (sDefaultApp != nil);
+}
+
++ (void)registerLibrary:(nonnull NSString *)name withVersion:(nonnull NSString *)version {
+  // Create the set of characters which aren't allowed, only if this feature is used.
+  NSMutableCharacterSet *allowedSet = [NSMutableCharacterSet alphanumericCharacterSet];
+  [allowedSet addCharactersInString:@"-_."];
+  NSCharacterSet *disallowedSet = [allowedSet invertedSet];
+  // Make sure the library name and version strings do not contain unexpected characters, and
+  // add the name/version pair to the dictionary.
+  if ([name rangeOfCharacterFromSet:disallowedSet].location == NSNotFound &&
+      [version rangeOfCharacterFromSet:disallowedSet].location == NSNotFound) {
+    [[self userAgent] setValue:version forComponent:name];
+  } else {
+    FIRLogError(kFIRLoggerCore, @"I-COR000027",
+                @"The library name (%@) or version number (%@) contain invalid characters. "
+                @"Only alphanumeric, dash, underscore and period characters are allowed.",
+                name, version);
+  }
+}
+
++ (void)registerInternalLibrary:(nonnull Class<FIRLibrary>)library
+                       withName:(nonnull NSString *)name {
+  [self registerInternalLibrary:library withName:name withVersion:FIRFirebaseVersion()];
+}
+
++ (void)registerInternalLibrary:(nonnull Class<FIRLibrary>)library
+                       withName:(nonnull NSString *)name
+                    withVersion:(nonnull NSString *)version {
+  // This is called at +load time, keep the work to a minimum.
+
+  // Ensure the class given conforms to the proper protocol.
+  if (![(Class)library conformsToProtocol:@protocol(FIRLibrary)] ||
+      ![(Class)library respondsToSelector:@selector(componentsToRegister)]) {
+    [NSException raise:NSInvalidArgumentException
+                format:@"Class %@ attempted to register components, but it does not conform to "
+                       @"`FIRLibrary or provide a `componentsToRegister:` method.",
+                       library];
+  }
+
+  [FIRComponentContainer registerAsComponentRegistrant:library];
+  [self registerLibrary:name withVersion:version];
+}
+
++ (FIRFirebaseUserAgent *)userAgent {
+  static dispatch_once_t onceToken;
+  static FIRFirebaseUserAgent *_userAgent;
+  dispatch_once(&onceToken, ^{
+    _userAgent = [[FIRFirebaseUserAgent alloc] init];
+    [_userAgent setValue:FIRFirebaseVersion() forComponent:@"fire-ios"];
+  });
+  return _userAgent;
+}
+
++ (NSString *)firebaseUserAgent {
+  return [[self userAgent] firebaseUserAgent];
+}
+
+- (void)checkExpectedBundleID {
+  NSArray *bundles = [FIRBundleUtil relevantBundles];
+  NSString *expectedBundleID = [self expectedBundleID];
+  // The checking is only done when the bundle ID is provided in the serviceInfo dictionary for
+  // backward compatibility.
+  if (expectedBundleID != nil && ![FIRBundleUtil hasBundleIdentifierPrefix:expectedBundleID
+                                                                 inBundles:bundles]) {
+    FIRLogError(kFIRLoggerCore, @"I-COR000008",
+                @"The project's Bundle ID is inconsistent with "
+                @"either the Bundle ID in '%@.%@', or the Bundle ID in the options if you are "
+                @"using a customized options. To ensure that everything can be configured "
+                @"correctly, you may need to make the Bundle IDs consistent. To continue with this "
+                @"plist file, you may change your app's bundle identifier to '%@'. Or you can "
+                @"download a new configuration file that matches your bundle identifier from %@ "
+                @"and replace the current one.",
+                kServiceInfoFileName, kServiceInfoFileType, expectedBundleID, kPlistURL);
+  }
+}
+
+#pragma mark - private - App ID Validation
+
+/**
+ * Validates the format of app ID and its included bundle ID hash contained in GOOGLE_APP_ID in the
+ * plist file. This is the main method for validating app ID.
+ *
+ * @return YES if the app ID fulfills the expected format and contains a hashed bundle ID, NO
+ * otherwise.
+ */
+- (BOOL)isAppIDValid {
+  NSString *appID = _options.googleAppID;
+  BOOL isValid = [FIRApp validateAppID:appID];
+  if (!isValid) {
+    NSString *expectedBundleID = [self expectedBundleID];
+    FIRLogError(kFIRLoggerCore, @"I-COR000009",
+                @"The GOOGLE_APP_ID either in the plist file "
+                @"'%@.%@' or the one set in the customized options is invalid. If you are using "
+                @"the plist file, use the iOS version of bundle identifier to download the file, "
+                @"and do not manually edit the GOOGLE_APP_ID. You may change your app's bundle "
+                @"identifier to '%@'. Or you can download a new configuration file that matches "
+                @"your bundle identifier from %@ and replace the current one.",
+                kServiceInfoFileName, kServiceInfoFileType, expectedBundleID, kPlistURL);
+  };
+  return isValid;
+}
+
++ (BOOL)validateAppID:(NSString *)appID {
+  // Failing validation only occurs when we are sure we are looking at a V2 app ID and it does not
+  // have a valid hashed bundle ID, otherwise we just warn about the potential issue.
+  if (!appID.length) {
+    return NO;
+  }
+
+  NSScanner *stringScanner = [NSScanner scannerWithString:appID];
+  stringScanner.charactersToBeSkipped = nil;
+
+  NSString *appIDVersion;
+  if (![stringScanner scanCharactersFromSet:[NSCharacterSet decimalDigitCharacterSet]
+                                 intoString:&appIDVersion]) {
+    return NO;
+  }
+
+  if (![stringScanner scanString:@":" intoString:NULL]) {
+    // appIDVersion must be separated by ":"
+    return NO;
+  }
+
+  NSArray *knownVersions = @[ @"1" ];
+  if (![knownVersions containsObject:appIDVersion]) {
+    // Permit unknown yet properly formatted app ID versions.
+    FIRLogInfo(kFIRLoggerCore, @"I-COR000010", @"Unknown GOOGLE_APP_ID version: %@", appIDVersion);
+    return YES;
+  }
+
+  if (![self validateAppIDFormat:appID withVersion:appIDVersion]) {
+    return NO;
+  }
+
+  if (![self validateBundleIDHashWithinAppID:appID forVersion:appIDVersion]) {
+    return NO;
+  }
+
+  return YES;
+}
+
++ (NSString *)actualBundleID {
+  return [[NSBundle mainBundle] bundleIdentifier];
+}
+
+/**
+ * Validates that the format of the app ID string is what is expected based on the supplied version.
+ * The version must end in ":".
+ *
+ * For v1 app ids the format is expected to be
+ * '<version #>:<project number>:ios:<hashed bundle id>'.
+ *
+ * This method does not verify that the contents of the app id are correct, just that they fulfill
+ * the expected format.
+ *
+ * @param appID Contents of GOOGLE_APP_ID from the plist file.
+ * @param version Indicates what version of the app id format this string should be.
+ * @return YES if provided string fulfills the expected format, NO otherwise.
+ */
++ (BOOL)validateAppIDFormat:(NSString *)appID withVersion:(NSString *)version {
+  if (!appID.length || !version.length) {
+    return NO;
+  }
+
+  NSScanner *stringScanner = [NSScanner scannerWithString:appID];
+  stringScanner.charactersToBeSkipped = nil;
+
+  // Skip version part
+  // '*<version #>*:<project number>:ios:<hashed bundle id>'
+  if (![stringScanner scanString:version intoString:NULL]) {
+    // The version part is missing or mismatched
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>*:*<project number>:ios:<hashed bundle id>'
+  if (![stringScanner scanString:@":" intoString:NULL]) {
+    // appIDVersion must be separated by ":"
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:*<project number>*:ios:<hashed bundle id>'.
+  NSInteger projectNumber = NSNotFound;
+  if (![stringScanner scanInteger:&projectNumber]) {
+    // NO project number found.
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:<project number>*:*ios:<hashed bundle id>'.
+  if (![stringScanner scanString:@":" intoString:NULL]) {
+    // The project number must be separated by ":"
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:<project number>:*ios*:<hashed bundle id>'.
+  NSString *platform;
+  if (![stringScanner scanUpToString:@":" intoString:&platform]) {
+    return NO;
+  }
+
+  if (![platform isEqualToString:@"ios"]) {
+    // The platform must be @"ios"
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:<project number>:ios*:*<hashed bundle id>'.
+  if (![stringScanner scanString:@":" intoString:NULL]) {
+    // The platform must be separated by ":"
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:<project number>:ios:*<hashed bundle id>*'.
+  unsigned long long bundleIDHash = NSNotFound;
+  if (![stringScanner scanHexLongLong:&bundleIDHash]) {
+    // Hashed bundleID part is missing
+    return NO;
+  }
+
+  if (!stringScanner.isAtEnd) {
+    // There are not allowed characters in the hashed bundle ID part
+    return NO;
+  }
+
+  return YES;
+}
+
+/**
+ * Validates that the hashed bundle ID included in the app ID string is what is expected based on
+ * the supplied version.
+ *
+ * Note that the v1 hash algorithm is not permitted on the client and cannot be fully validated.
+ *
+ * @param appID Contents of GOOGLE_APP_ID from the plist file.
+ * @param version Indicates what version of the app id format this string should be.
+ * @return YES if provided string fulfills the expected hashed bundle ID and the version is known,
+ *         NO otherwise.
+ */
++ (BOOL)validateBundleIDHashWithinAppID:(NSString *)appID forVersion:(NSString *)version {
+  // Extract the hashed bundle ID from the given app ID.
+  // This assumes the app ID format is the same for all known versions below.
+  // If the app ID format changes in future versions, the tokenizing of the app
+  // ID format will need to take into account the version of the app ID.
+  NSArray *components = [appID componentsSeparatedByString:@":"];
+  if (components.count != 4) {
+    return NO;
+  }
+
+  NSString *suppliedBundleIDHashString = components[3];
+  if (!suppliedBundleIDHashString.length) {
+    return NO;
+  }
+
+  uint64_t suppliedBundleIDHash;
+  NSScanner *scanner = [NSScanner scannerWithString:suppliedBundleIDHashString];
+  if (![scanner scanHexLongLong:&suppliedBundleIDHash]) {
+    return NO;
+  }
+
+  if ([version isEqual:@"1"]) {
+    // The v1 hash algorithm is not permitted on the client so the actual hash cannot be validated.
+    return YES;
+  }
+
+  // Unknown version.
+  return NO;
+}
+
+- (NSString *)expectedBundleID {
+  return _options.bundleID;
+}
+
+// end App ID validation
+
+#pragma mark - Reading From Plist & User Defaults
+
+/**
+ * Clears the data collection switch from the standard NSUserDefaults for easier testing and
+ * readability.
+ */
+- (void)clearDataCollectionSwitchFromUserDefaults {
+  NSString *key =
+      [NSString stringWithFormat:kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat, self.name];
+  [[NSUserDefaults standardUserDefaults] removeObjectForKey:key];
+}
+
+/**
+ * Reads the data collection switch from the standard NSUserDefaults for easier testing and
+ * readability.
+ */
++ (nullable NSNumber *)readDataCollectionSwitchFromUserDefaultsForApp:(FIRApp *)app {
+  // Read the object in user defaults, and only return if it's an NSNumber.
+  NSString *key =
+      [NSString stringWithFormat:kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat, app.name];
+  id collectionEnabledDefaultsObject = [[NSUserDefaults standardUserDefaults] objectForKey:key];
+  if ([collectionEnabledDefaultsObject isKindOfClass:[NSNumber class]]) {
+    return collectionEnabledDefaultsObject;
+  }
+
+  return nil;
+}
+
+/**
+ * Reads the data collection switch from the Info.plist for easier testing and readability. Will
+ * only read once from the plist and return the cached value.
+ */
++ (nullable NSNumber *)readDataCollectionSwitchFromPlist {
+  static NSNumber *collectionEnabledPlistObject;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    // Read the data from the `Info.plist`, only assign it if it's there and an NSNumber.
+    id plistValue = [[NSBundle mainBundle]
+        objectForInfoDictionaryKey:kFIRGlobalAppDataCollectionEnabledPlistKey];
+    if (plistValue && [plistValue isKindOfClass:[NSNumber class]]) {
+      collectionEnabledPlistObject = (NSNumber *)plistValue;
+    }
+  });
+
+  return collectionEnabledPlistObject;
+}
+
+#pragma mark - Swift Components.
+
++ (void)registerSwiftComponents {
+  SEL componentsToRegisterSEL = @selector(componentsToRegister);
+  // Dictionary of class names that conform to `FIRLibrary` and their user agents. These should only
+  // be SDKs that are written in Swift but still visible to ObjC.
+  // This is only necessary for products that need to do work at launch during configuration.
+  NSDictionary<NSString *, NSString *> *swiftComponents = @{
+    @"FIRSessions" : @"fire-ses",
+    @"FIRAuthComponent" : @"fire-auth",
+  };
+  for (NSString *className in swiftComponents.allKeys) {
+    Class klass = NSClassFromString(className);
+    if (klass && [klass respondsToSelector:componentsToRegisterSEL]) {
+      [FIRApp registerInternalLibrary:klass withName:swiftComponents[className]];
+    }
+  }
+
+  // Swift libraries that don't need component behaviour
+  NSDictionary<NSString *, NSString *> *swiftLibraries = @{
+    @"FIRCombineAuthLibrary" : @"comb-auth",
+    @"FIRCombineFirestoreLibrary" : @"comb-firestore",
+    @"FIRCombineFunctionsLibrary" : @"comb-functions",
+    @"FIRCombineStorageLibrary" : @"comb-storage",
+    @"FIRFunctions" : @"fire-fun",
+    @"FIRStorage" : @"fire-str",
+    @"FIRVertexAIComponent" : @"fire-vertex",
+  };
+  for (NSString *className in swiftLibraries.allKeys) {
+    Class klass = NSClassFromString(className);
+    if (klass) {
+      [FIRApp registerLibrary:swiftLibraries[className] withVersion:FIRFirebaseVersion()];
+    }
+  }
+}
+
+#pragma mark - App Life Cycle
+
+- (void)subscribeForAppDidBecomeActiveNotifications {
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_VISION
+  NSNotificationName notificationName = UIApplicationDidBecomeActiveNotification;
+#elif TARGET_OS_OSX
+  NSNotificationName notificationName = NSApplicationDidBecomeActiveNotification;
+#elif TARGET_OS_WATCH
+  // TODO(ncooke3): Remove when minimum supported watchOS version is watchOS 7.0.
+  // On watchOS 7.0+, heartbeats are logged when the watch app becomes active.
+  // On watchOS 6.0, heartbeats are logged when the Firebase app is configuring.
+  // While it does not cover all use cases, logging when the Firebase app is
+  // configuring is done because watchOS lifecycle notifications are a
+  // watchOS 7.0+ feature.
+  NSNotificationName notificationName = kFIRAppReadyToConfigureSDKNotification;
+  if (@available(watchOS 7.0, *)) {
+    notificationName = WKApplicationDidBecomeActiveNotification;
+  }
+#endif
+
+  [[NSNotificationCenter defaultCenter] addObserver:self
+                                           selector:@selector(appDidBecomeActive:)
+                                               name:notificationName
+                                             object:nil];
+}
+
+- (void)appDidBecomeActive:(NSNotification *)notification {
+  if ([self isDataCollectionDefaultEnabled]) {
+    // If changing the below line, consult with the Games team to ensure they
+    // are not negatively impacted. For more details, see
+    // go/firebase-game-sdk-user-agent-register-timing.
+    [self.heartbeatLogger log];
+  }
+}
+
+#if DEBUG
++ (void)findMisnamedGoogleServiceInfoPlist {
+  for (NSBundle *bundle in [NSBundle allBundles]) {
+    // Not recursive, but we're looking for misnames, not people accidentally
+    // hiding their config file in a subdirectory of their bundle.
+    NSArray *plistPaths = [bundle pathsForResourcesOfType:@"plist" inDirectory:nil];
+    for (NSString *path in plistPaths) {
+      @autoreleasepool {
+        NSDictionary<NSString *, id> *contents = [NSDictionary dictionaryWithContentsOfFile:path];
+        if (contents == nil) {
+          continue;
+        }
+
+        NSString *projectID = contents[@"PROJECT_ID"];
+        if (projectID != nil) {
+          [NSException raise:kFirebaseCoreErrorDomain
+                      format:@"`FirebaseApp.configure()` could not find the default "
+                             @"configuration plist in your project, but did find one at "
+                             @"%@. Please rename this file to GoogleService-Info.plist to "
+                             @"use it as the default configuration.",
+                             path];
+        }
+      }
+    }
+  }
+}
+#endif  // DEBUG
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRBundleUtil.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/**
+ * This class provides utilities for accessing resources in bundles.
+ */
+@interface FIRBundleUtil : NSObject
+
+/**
+ * Finds all relevant bundles, starting with [NSBundle mainBundle].
+ */
++ (NSArray *)relevantBundles;
+
+/**
+ * Reads the options dictionary from one of the provided bundles.
+ *
+ * @param resourceName The resource name, e.g. @"GoogleService-Info".
+ * @param fileType The file type (extension), e.g. @"plist".
+ * @param bundles The bundles to expect, in priority order. See also
+ * +[FIRBundleUtil relevantBundles].
+ */
++ (NSString *)optionsDictionaryPathWithResourceName:(NSString *)resourceName
+                                        andFileType:(NSString *)fileType
+                                          inBundles:(NSArray *)bundles;
+
+/**
+ * Finds URL schemes defined in all relevant bundles, starting with those from
+ * [NSBundle mainBundle].
+ */
++ (NSArray *)relevantURLSchemes;
+
+/**
+ * Checks if any of the given bundles have a matching bundle identifier prefix (removing extension
+ * suffixes).
+ */
++ (BOOL)hasBundleIdentifierPrefix:(NSString *)bundleIdentifier inBundles:(NSArray *)bundles;
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRBundleUtil.m

@@ -0,0 +1,79 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "FirebaseCore/Sources/FIRBundleUtil.h"
+
+#import <GoogleUtilities/GULAppEnvironmentUtil.h>
+
+@implementation FIRBundleUtil
+
++ (NSArray *)relevantBundles {
+  return @[ [NSBundle mainBundle], [NSBundle bundleForClass:[self class]] ];
+}
+
++ (NSString *)optionsDictionaryPathWithResourceName:(NSString *)resourceName
+                                        andFileType:(NSString *)fileType
+                                          inBundles:(NSArray *)bundles {
+  // Loop through all bundles to find the config dict.
+  for (NSBundle *bundle in bundles) {
+    NSString *path = [bundle pathForResource:resourceName ofType:fileType];
+    // Use the first one we find.
+    if (path) {
+      return path;
+    }
+  }
+  return nil;
+}
+
++ (NSArray *)relevantURLSchemes {
+  NSMutableArray *result = [[NSMutableArray alloc] init];
+  for (NSBundle *bundle in [[self class] relevantBundles]) {
+    NSArray *urlTypes = [bundle objectForInfoDictionaryKey:@"CFBundleURLTypes"];
+    for (NSDictionary *urlType in urlTypes) {
+      [result addObjectsFromArray:urlType[@"CFBundleURLSchemes"]];
+    }
+  }
+  return result;
+}
+
++ (BOOL)hasBundleIdentifierPrefix:(NSString *)bundleIdentifier inBundles:(NSArray *)bundles {
+  for (NSBundle *bundle in bundles) {
+    if ([bundle.bundleIdentifier isEqualToString:bundleIdentifier]) {
+      return YES;
+    }
+
+    if ([GULAppEnvironmentUtil isAppExtension]) {
+      // A developer could be using the same `FIROptions` for both their app and extension. Since
+      // extensions have a suffix added to the bundleID, we consider a matching prefix as valid.
+      NSString *appBundleIDFromExtension =
+          [self bundleIdentifierByRemovingLastPartFrom:bundle.bundleIdentifier];
+      if ([appBundleIDFromExtension isEqualToString:bundleIdentifier]) {
+        return YES;
+      }
+    }
+  }
+  return NO;
+}
+
++ (NSString *)bundleIdentifierByRemovingLastPartFrom:(NSString *)bundleIdentifier {
+  NSString *bundleIDComponentsSeparator = @".";
+
+  NSMutableArray<NSString *> *bundleIDComponents =
+      [[bundleIdentifier componentsSeparatedByString:bundleIDComponentsSeparator] mutableCopy];
+  [bundleIDComponents removeLastObject];
+
+  return [bundleIDComponents componentsJoinedByString:bundleIDComponentsSeparator];
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRComponent.m

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FirebaseCore/Extension/FIRComponent.h"
+
+#import "FirebaseCore/Extension/FIRComponentContainer.h"
+
+@interface FIRComponent ()
+
+- (instancetype)initWithProtocol:(Protocol *)protocol
+             instantiationTiming:(FIRInstantiationTiming)instantiationTiming
+                   creationBlock:(FIRComponentCreationBlock)creationBlock;
+
+@end
+
+@implementation FIRComponent
+
++ (instancetype)componentWithProtocol:(Protocol *)protocol
+                        creationBlock:(FIRComponentCreationBlock)creationBlock {
+  return [[FIRComponent alloc] initWithProtocol:protocol
+                            instantiationTiming:FIRInstantiationTimingLazy
+                                  creationBlock:creationBlock];
+}
+
++ (instancetype)componentWithProtocol:(Protocol *)protocol
+                  instantiationTiming:(FIRInstantiationTiming)instantiationTiming
+                        creationBlock:(FIRComponentCreationBlock)creationBlock {
+  return [[FIRComponent alloc] initWithProtocol:protocol
+                            instantiationTiming:instantiationTiming
+                                  creationBlock:creationBlock];
+}
+
+- (instancetype)initWithProtocol:(Protocol *)protocol
+             instantiationTiming:(FIRInstantiationTiming)instantiationTiming
+                   creationBlock:(FIRComponentCreationBlock)creationBlock {
+  self = [super init];
+  if (self) {
+    _protocol = protocol;
+    _instantiationTiming = instantiationTiming;
+    _creationBlock = creationBlock;
+  }
+  return self;
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRComponentContainer.m

@@ -0,0 +1,251 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FirebaseCore/Extension/FIRComponentContainer.h"
+
+#import "FirebaseCore/Extension/FIRAppInternal.h"
+#import "FirebaseCore/Extension/FIRComponent.h"
+#import "FirebaseCore/Extension/FIRLibrary.h"
+#import "FirebaseCore/Extension/FIRLogger.h"
+#import "FirebaseCore/Extension/FIROptionsInternal.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FIRComponentContainer ()
+
+/// The dictionary of components that are registered for a particular app. The key is an `NSString`
+/// of the protocol.
+@property(nonatomic, strong) NSMutableDictionary<NSString *, FIRComponentCreationBlock> *components;
+
+/// Cached instances of components that requested to be cached.
+@property(nonatomic, strong) NSMutableDictionary<NSString *, id> *cachedInstances;
+
+/// Protocols of components that have requested to be eagerly instantiated.
+@property(nonatomic, strong, nullable) NSMutableArray<Protocol *> *eagerProtocolsToInstantiate;
+
+@end
+
+@implementation FIRComponentContainer
+
+// Collection of all classes that register to provide components.
+static NSMutableSet<Class> *sFIRComponentRegistrants;
+
+#pragma mark - Public Registration
+
++ (void)registerAsComponentRegistrant:(Class<FIRLibrary>)klass {
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    sFIRComponentRegistrants = [[NSMutableSet<Class> alloc] init];
+  });
+
+  [self registerAsComponentRegistrant:klass inSet:sFIRComponentRegistrants];
+}
+
++ (void)registerAsComponentRegistrant:(Class<FIRLibrary>)klass
+                                inSet:(NSMutableSet<Class> *)allRegistrants {
+  [allRegistrants addObject:klass];
+}
+
+#pragma mark - Internal Initialization
+
+- (instancetype)initWithApp:(FIRApp *)app {
+  NSMutableSet<Class> *componentRegistrants = sFIRComponentRegistrants;
+  // If the app being created is for the ARCore SDK, remove the App Check
+  // component (if it exists) since it does not support App Check.
+  if ([self isAppForARCore:app]) {
+    Class klass = NSClassFromString(@"FIRAppCheckComponent");
+    if (klass && [sFIRComponentRegistrants containsObject:klass]) {
+      componentRegistrants = [componentRegistrants mutableCopy];
+      [componentRegistrants removeObject:klass];
+    }
+  }
+
+  return [self initWithApp:app registrants:componentRegistrants];
+}
+
+- (instancetype)initWithApp:(FIRApp *)app registrants:(NSMutableSet<Class> *)allRegistrants {
+  self = [super init];
+  if (self) {
+    _app = app;
+    _cachedInstances = [NSMutableDictionary<NSString *, id> dictionary];
+    _components = [NSMutableDictionary<NSString *, FIRComponentCreationBlock> dictionary];
+
+    [self populateComponentsFromRegisteredClasses:allRegistrants forApp:app];
+  }
+  return self;
+}
+
+- (void)populateComponentsFromRegisteredClasses:(NSSet<Class> *)classes forApp:(FIRApp *)app {
+  // Keep track of any components that need to eagerly instantiate after all components are added.
+  self.eagerProtocolsToInstantiate = [[NSMutableArray alloc] init];
+
+  // Loop through the verified component registrants and populate the components array.
+  for (Class<FIRLibrary> klass in classes) {
+    // Loop through all the components being registered and store them as appropriate.
+    // Classes which do not provide functionality should use a dummy FIRComponentRegistrant
+    // protocol.
+    for (FIRComponent *component in [klass componentsToRegister]) {
+      // Check if the component has been registered before, and error out if so.
+      NSString *protocolName = NSStringFromProtocol(component.protocol);
+      if (self.components[protocolName]) {
+        FIRLogError(kFIRLoggerCore, @"I-COR000029",
+                    @"Attempted to register protocol %@, but it already has an implementation.",
+                    protocolName);
+        continue;
+      }
+
+      // Store the creation block for later usage.
+      self.components[protocolName] = component.creationBlock;
+
+      // Queue any protocols that should be eagerly instantiated. Don't instantiate them yet
+      // because they could depend on other components that haven't been added to the components
+      // array yet.
+      BOOL shouldInstantiateEager =
+          (component.instantiationTiming == FIRInstantiationTimingAlwaysEager);
+      BOOL shouldInstantiateDefaultEager =
+          (component.instantiationTiming == FIRInstantiationTimingEagerInDefaultApp &&
+           [app isDefaultApp]);
+      if (shouldInstantiateEager || shouldInstantiateDefaultEager) {
+        [self.eagerProtocolsToInstantiate addObject:component.protocol];
+      }
+    }
+  }
+}
+
+#pragma mark - Instance Creation
+
+- (void)instantiateEagerComponents {
+  // After all components are registered, instantiate the ones that are requesting eager
+  // instantiation.
+  @synchronized(self) {
+    for (Protocol *protocol in self.eagerProtocolsToInstantiate) {
+      // Get an instance for the protocol, which will instantiate it since it couldn't have been
+      // cached yet. Ignore the instance coming back since we don't need it.
+      __unused id unusedInstance = [self instanceForProtocol:protocol];
+    }
+
+    // All eager instantiation is complete, clear the stored property now.
+    self.eagerProtocolsToInstantiate = nil;
+  }
+}
+
+/// Instantiate an instance of a class that conforms to the specified protocol.
+/// This will:
+///   - Call the block to create an instance if possible,
+///   - Validate that the instance returned conforms to the protocol it claims to,
+///   - Cache the instance if the block requests it
+///
+/// Note that this method assumes the caller already has @synchronized on self.
+- (nullable id)instantiateInstanceForProtocol:(Protocol *)protocol
+                                    withBlock:(FIRComponentCreationBlock)creationBlock {
+  if (!creationBlock) {
+    return nil;
+  }
+
+  // Create an instance using the creation block.
+  BOOL shouldCache = NO;
+  id instance = creationBlock(self, &shouldCache);
+  if (!instance) {
+    return nil;
+  }
+
+  // An instance was created, validate that it conforms to the protocol it claims to.
+  NSString *protocolName = NSStringFromProtocol(protocol);
+  if (![instance conformsToProtocol:protocol]) {
+    FIRLogError(kFIRLoggerCore, @"I-COR000030",
+                @"An instance conforming to %@ was requested, but the instance provided does not "
+                @"conform to the protocol",
+                protocolName);
+  }
+
+  // The instance is ready to be returned, but check if it should be cached first before returning.
+  if (shouldCache) {
+    self.cachedInstances[protocolName] = instance;
+  }
+
+  return instance;
+}
+
+#pragma mark - Internal Retrieval
+
+// Redirected for Swift users.
+- (nullable id)__instanceForProtocol:(Protocol *)protocol {
+  return [self instanceForProtocol:protocol];
+}
+
+- (nullable id)instanceForProtocol:(Protocol *)protocol {
+  // Check if there is a cached instance, and return it if so.
+  NSString *protocolName = NSStringFromProtocol(protocol);
+
+  id cachedInstance;
+  @synchronized(self) {
+    cachedInstance = self.cachedInstances[protocolName];
+    if (!cachedInstance) {
+      // Use the creation block to instantiate an instance and return it.
+      FIRComponentCreationBlock creationBlock = self.components[protocolName];
+      cachedInstance = [self instantiateInstanceForProtocol:protocol withBlock:creationBlock];
+    }
+  }
+  return cachedInstance;
+}
+
+#pragma mark - Lifecycle
+
+- (void)removeAllCachedInstances {
+  @synchronized(self) {
+    // Loop through the cache and notify each instance that is a maintainer to clean up after
+    // itself.
+    for (id instance in self.cachedInstances.allValues) {
+      if ([instance conformsToProtocol:@protocol(FIRComponentLifecycleMaintainer)] &&
+          [instance respondsToSelector:@selector(appWillBeDeleted:)]) {
+        [instance appWillBeDeleted:self.app];
+      }
+    }
+
+    // Empty the cache.
+    [self.cachedInstances removeAllObjects];
+  }
+}
+
+- (void)removeAllComponents {
+  @synchronized(self) {
+    [self.components removeAllObjects];
+  }
+}
+
+#pragma mark - Helpers
+
+- (BOOL)isAppForARCore:(FIRApp *)app {
+  // First, check if the app name matches that of the one used by ARCore.
+  if ([app.name isEqualToString:@"ARCoreFIRApp"]) {
+    // Second, check if the app's gcmSenderID matches that of ARCore. This
+    // prevents false positives in the unlikely event a 3P Firebase app is
+    // named `ARCoreFIRApp`.
+    const char *p1 = "406756";
+    const char *p2 = "893798";
+    const char gcmSenderIDKey[27] = {p1[0],  p2[0],  p1[1],  p2[1],  p1[2],  p2[2], p1[3],
+                                     p2[3],  p1[4],  p2[4],  p1[5],  p2[5],  p1[6], p2[6],
+                                     p1[7],  p2[7],  p1[8],  p2[8],  p1[9],  p2[9], p1[10],
+                                     p2[10], p1[11], p2[11], p1[12], p2[12], '\0'};
+    NSString *gcmSenderID = [NSString stringWithUTF8String:gcmSenderIDKey];
+    return [app.options.GCMSenderID isEqualToString:gcmSenderID];
+  }
+  return NO;
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/FIRComponentContainerInternal.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#import <Foundation/Foundation.h>
+
+#import "FirebaseCore/Extension/FIRComponentContainer.h"
+#import "FirebaseCore/Extension/FIRLibrary.h"
+
+@class FIRApp;
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FIRComponentContainer (Private)
+
+/// Initializes a container for a given app. This should only be called by the app itself.
+- (instancetype)initWithApp:(FIRApp *)app;
+
+/// Retrieves an instance that conforms to the specified protocol. This will return `nil` if the
+/// protocol wasn't registered, or if the instance couldn't be instantiated for the provided app.
+- (nullable id)instanceForProtocol:(Protocol *)protocol
+    NS_SWIFT_UNAVAILABLE("Use `instance(for:)` from the FirebaseCoreExtension module instead.");
+
+/// Instantiates all the components that have registered as "eager" after initialization.
+- (void)instantiateEagerComponents;
+
+/// Remove all of the cached instances stored and allow them to clean up after themselves.
+- (void)removeAllCachedInstances;
+
+/// Removes all the components. After calling this method no new instances will be created.
+- (void)removeAllComponents;
+
+/// Register a class to provide components for the interoperability system. The class should conform
+/// to `FIRComponentRegistrant` and provide an array of `FIRComponent` objects.
++ (void)registerAsComponentRegistrant:(Class<FIRLibrary>)klass;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/FIRComponentType.m

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FirebaseCore/Extension/FIRComponentType.h"
+
+#import "FirebaseCore/Sources/FIRComponentContainerInternal.h"
+
+@implementation FIRComponentType
+
++ (nullable id)instanceForProtocol:(Protocol *)protocol
+                       inContainer:(FIRComponentContainer *)container {
+  // Forward the call to the container.
+  return [container instanceForProtocol:protocol];
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRConfiguration.m

@@ -0,0 +1,46 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "FirebaseCore/Sources/FIRConfigurationInternal.h"
+
+#import "FirebaseCore/Sources/FIRAnalyticsConfiguration.h"
+
+extern void FIRSetLoggerLevel(FIRLoggerLevel loggerLevel);
+
+@implementation FIRConfiguration
+
++ (instancetype)sharedInstance {
+  static FIRConfiguration *sharedInstance = nil;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    sharedInstance = [[FIRConfiguration alloc] init];
+  });
+  return sharedInstance;
+}
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _analyticsConfiguration = [FIRAnalyticsConfiguration sharedInstance];
+  }
+  return self;
+}
+
+- (void)setLoggerLevel:(FIRLoggerLevel)loggerLevel {
+  NSAssert(loggerLevel <= FIRLoggerLevelMax && loggerLevel >= FIRLoggerLevelMin,
+           @"Invalid logger level, %ld", (long)loggerLevel);
+  FIRSetLoggerLevel(loggerLevel);
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRConfigurationInternal.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FirebaseCore/Sources/Public/FirebaseCore/FIRConfiguration.h"
+
+@class FIRAnalyticsConfiguration;
+
+@interface FIRConfiguration ()
+
+/**
+ * The configuration class for Firebase Analytics. This should be removed once the logic for
+ * enabling and disabling Analytics is moved to Analytics.
+ */
+@property(nonatomic, readwrite) FIRAnalyticsConfiguration *analyticsConfiguration;
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRFirebaseUserAgent.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FIRFirebaseUserAgent : NSObject
+
+/** Returns the firebase user agent which consists of environment part and the components added via
+ * `setValue:forComponent` method. */
+- (NSString *)firebaseUserAgent;
+
+/** Sets value associated with the specified component. If value is `nil` then the component is
+ * removed. */
+- (void)setValue:(nullable NSString *)value forComponent:(NSString *)componentName;
+
+/** Resets manually added components. */
+- (void)reset;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/FIRFirebaseUserAgent.m

@@ -0,0 +1,107 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FirebaseCore/Sources/FIRFirebaseUserAgent.h"
+
+#import <GoogleUtilities/GULAppEnvironmentUtil.h>
+
+@interface FIRFirebaseUserAgent ()
+
+@property(nonatomic, readonly) NSMutableDictionary<NSString *, NSString *> *valuesByComponent;
+@property(nonatomic, readonly) NSDictionary<NSString *, NSString *> *environmentComponents;
+@property(nonatomic, readonly) NSString *firebaseUserAgent;
+
+@end
+
+@implementation FIRFirebaseUserAgent
+
+@synthesize firebaseUserAgent = _firebaseUserAgent;
+@synthesize environmentComponents = _environmentComponents;
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _valuesByComponent = [[NSMutableDictionary alloc] init];
+  }
+  return self;
+}
+
+- (NSString *)firebaseUserAgent {
+  @synchronized(self) {
+    if (_firebaseUserAgent == nil) {
+      NSMutableDictionary<NSString *, NSString *> *allComponents =
+          [self.valuesByComponent mutableCopy];
+      [allComponents setValuesForKeysWithDictionary:self.environmentComponents];
+
+      __block NSMutableArray<NSString *> *components =
+          [[NSMutableArray<NSString *> alloc] initWithCapacity:self.valuesByComponent.count];
+      [allComponents enumerateKeysAndObjectsUsingBlock:^(
+                         NSString *_Nonnull name, NSString *_Nonnull value, BOOL *_Nonnull stop) {
+        [components addObject:[NSString stringWithFormat:@"%@/%@", name, value]];
+      }];
+      [components sortUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
+      _firebaseUserAgent = [components componentsJoinedByString:@" "];
+    }
+    return _firebaseUserAgent;
+  }
+}
+
+- (void)setValue:(nullable NSString *)value forComponent:(NSString *)componentName {
+  @synchronized(self) {
+    self.valuesByComponent[componentName] = value;
+    // Reset cached user agent string.
+    _firebaseUserAgent = nil;
+  }
+}
+
+- (void)reset {
+  @synchronized(self) {
+    // Reset components.
+    _valuesByComponent = [[[self class] environmentComponents] mutableCopy];
+    // Reset cached user agent string.
+    _firebaseUserAgent = nil;
+  }
+}
+
+#pragma mark - Environment components
+
+- (NSDictionary<NSString *, NSString *> *)environmentComponents {
+  if (_environmentComponents == nil) {
+    _environmentComponents = [[self class] environmentComponents];
+  }
+  return _environmentComponents;
+}
+
++ (NSDictionary<NSString *, NSString *> *)environmentComponents {
+  NSMutableDictionary<NSString *, NSString *> *components = [NSMutableDictionary dictionary];
+
+  NSDictionary<NSString *, id> *info = [[NSBundle mainBundle] infoDictionary];
+  NSString *xcodeVersion = info[@"DTXcodeBuild"];
+  NSString *appleSdkVersion = info[@"DTSDKBuild"];
+  NSString *isFromAppstoreFlagValue = [GULAppEnvironmentUtil isFromAppStore] ? @"true" : @"false";
+
+  components[@"apple-platform"] = [GULAppEnvironmentUtil applePlatform];
+  components[@"apple-sdk"] = appleSdkVersion;
+  components[@"appstore"] = isFromAppstoreFlagValue;
+  components[@"deploy"] = [GULAppEnvironmentUtil deploymentType];
+  components[@"device"] = [GULAppEnvironmentUtil deviceModel];
+  components[@"os-version"] = [GULAppEnvironmentUtil systemVersion];
+  components[@"xcode"] = xcodeVersion;
+
+  return [components copy];
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRHeartbeatLogger.m

@@ -0,0 +1,97 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+
+#ifndef FIREBASE_BUILD_CMAKE
+@import FirebaseCoreInternal;
+#endif  // FIREBASE_BUILD_CMAKE
+
+#import "FirebaseCore/Extension/FIRAppInternal.h"
+#import "FirebaseCore/Extension/FIRHeartbeatLogger.h"
+
+#ifndef FIREBASE_BUILD_CMAKE
+NSString *_Nullable FIRHeaderValueFromHeartbeatsPayload(FIRHeartbeatsPayload *heartbeatsPayload) {
+  if ([heartbeatsPayload isEmpty]) {
+    return nil;
+  }
+
+  return [heartbeatsPayload headerValue];
+}
+#endif  // FIREBASE_BUILD_CMAKE
+
+@interface FIRHeartbeatLogger ()
+#ifndef FIREBASE_BUILD_CMAKE
+@property(nonatomic, readonly) FIRHeartbeatController *heartbeatController;
+#endif  // FIREBASE_BUILD_CMAKE
+@property(copy, readonly) NSString * (^userAgentProvider)(void);
+@end
+
+@implementation FIRHeartbeatLogger
+
+- (instancetype)initWithAppID:(NSString *)appID {
+  return [self initWithAppID:appID userAgentProvider:[[self class] currentUserAgentProvider]];
+}
+
+- (instancetype)initWithAppID:(NSString *)appID
+            userAgentProvider:(NSString * (^)(void))userAgentProvider {
+  self = [super init];
+  if (self) {
+#ifndef FIREBASE_BUILD_CMAKE
+    _heartbeatController = [[FIRHeartbeatController alloc] initWithId:[appID copy]];
+#endif  // FIREBASE_BUILD_CMAKE
+    _userAgentProvider = [userAgentProvider copy];
+  }
+  return self;
+}
+
++ (NSString * (^)(void))currentUserAgentProvider {
+  return ^NSString * {
+    return [FIRApp firebaseUserAgent];
+  };
+}
+
+- (void)log {
+  NSString *userAgent = _userAgentProvider();
+#ifndef FIREBASE_BUILD_CMAKE
+  [_heartbeatController log:userAgent];
+#endif  // FIREBASE_BUILD_CMAKE
+}
+
+#ifndef FIREBASE_BUILD_CMAKE
+- (NSString *_Nullable)headerValue {
+  return FIRHeaderValueFromHeartbeatsPayload([self flushHeartbeatsIntoPayload]);
+}
+
+- (FIRHeartbeatsPayload *)flushHeartbeatsIntoPayload {
+  FIRHeartbeatsPayload *payload = [_heartbeatController flush];
+  return payload;
+}
+#endif  // FIREBASE_BUILD_CMAKE
+
+- (FIRDailyHeartbeatCode)heartbeatCodeForToday {
+#ifndef FIREBASE_BUILD_CMAKE
+  FIRHeartbeatsPayload *todaysHeartbeatPayload = [_heartbeatController flushHeartbeatFromToday];
+
+  if ([todaysHeartbeatPayload isEmpty]) {
+    return FIRDailyHeartbeatCodeNone;
+  } else {
+    return FIRDailyHeartbeatCodeSome;
+  }
+#else
+  return FIRDailyHeartbeatCodeNone;
+#endif  // FIREBASE_BUILD_CMAKE
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRLogger.m

@@ -0,0 +1,173 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "FirebaseCore/Extension/FIRLogger.h"
+
+#import <GoogleUtilities/GULAppEnvironmentUtil.h>
+#import <GoogleUtilities/GULLogger.h>
+#import "FirebaseCore/Sources/Public/FirebaseCore/FIRLoggerLevel.h"
+
+#import "FirebaseCore/Sources/Public/FirebaseCore/FIRVersion.h"
+
+NSString *const kFIRLoggerSubsystem = @"com.google.firebase";
+
+NSString *const kFIRLoggerCore = @"[FirebaseCore]";
+
+// All the FIRLoggerService definitions should be migrated to clients. Do not add new ones!
+NSString *const kFIRLoggerAnalytics = @"[FirebaseAnalytics]";
+NSString *const kFIRLoggerCrash = @"[FirebaseCrash]";
+NSString *const kFIRLoggerRemoteConfig = @"[FirebaseRemoteConfig]";
+
+/// Arguments passed on launch.
+NSString *const kFIRDisableDebugModeApplicationArgument = @"-FIRDebugDisabled";
+NSString *const kFIREnableDebugModeApplicationArgument = @"-FIRDebugEnabled";
+
+/// Key for the debug mode bit in NSUserDefaults.
+NSString *const kFIRPersistedDebugModeKey = @"/google/firebase/debug_mode";
+
+/// NSUserDefaults that should be used to store and read variables. If nil, `standardUserDefaults`
+/// will be used.
+static NSUserDefaults *sFIRLoggerUserDefaults;
+
+static dispatch_once_t sFIRLoggerOnceToken;
+
+// The sFIRAnalyticsDebugMode flag is here to support the -FIRDebugEnabled/-FIRDebugDisabled
+// flags used by Analytics. Users who use those flags expect Analytics to log verbosely,
+// while the rest of Firebase logs at the default level. This flag is introduced to support
+// that behavior.
+static BOOL sFIRAnalyticsDebugMode;
+
+#ifdef DEBUG
+/// The regex pattern for the message code.
+static NSString *const kMessageCodePattern = @"^I-[A-Z]{3}[0-9]{6}$";
+static NSRegularExpression *sMessageCodeRegex;
+#endif
+
+void FIRLoggerInitialize(void) {
+  dispatch_once(&sFIRLoggerOnceToken, ^{
+    // Register Firebase Version with GULLogger.
+    GULLoggerRegisterVersion(FIRFirebaseVersion());
+
+    NSArray *arguments = [NSProcessInfo processInfo].arguments;
+
+    // Use the standard NSUserDefaults if it hasn't been explicitly set.
+    if (sFIRLoggerUserDefaults == nil) {
+      sFIRLoggerUserDefaults = [NSUserDefaults standardUserDefaults];
+    }
+
+    BOOL forceDebugMode = NO;
+    BOOL debugMode = [sFIRLoggerUserDefaults boolForKey:kFIRPersistedDebugModeKey];
+    if ([arguments containsObject:kFIRDisableDebugModeApplicationArgument]) {  // Default mode
+      [sFIRLoggerUserDefaults removeObjectForKey:kFIRPersistedDebugModeKey];
+    } else if ([arguments containsObject:kFIREnableDebugModeApplicationArgument] ||
+               debugMode) {  // Debug mode
+      [sFIRLoggerUserDefaults setBool:YES forKey:kFIRPersistedDebugModeKey];
+      forceDebugMode = YES;
+    }
+    GULLoggerInitialize();
+    if (forceDebugMode) {
+      GULLoggerForceDebug();
+    }
+  });
+}
+
+__attribute__((no_sanitize("thread"))) void FIRSetAnalyticsDebugMode(BOOL analyticsDebugMode) {
+  sFIRAnalyticsDebugMode = analyticsDebugMode;
+}
+
+FIRLoggerLevel FIRGetLoggerLevel(void) {
+  return (FIRLoggerLevel)GULGetLoggerLevel();
+}
+
+void FIRSetLoggerLevel(FIRLoggerLevel loggerLevel) {
+  FIRLoggerInitialize();
+  GULSetLoggerLevel((GULLoggerLevel)loggerLevel);
+}
+
+#ifdef DEBUG
+void FIRResetLogger(void) {
+  extern void GULResetLogger(void);
+  sFIRLoggerOnceToken = 0;
+  [sFIRLoggerUserDefaults removeObjectForKey:kFIRPersistedDebugModeKey];
+  sFIRLoggerUserDefaults = nil;
+  GULResetLogger();
+}
+
+void FIRSetLoggerUserDefaults(NSUserDefaults *defaults) {
+  sFIRLoggerUserDefaults = defaults;
+}
+#endif
+
+/**
+ * Check if the level is high enough to be loggable.
+ *
+ * Analytics can override the log level with an intentional race condition.
+ * Add the attribute to get a clean thread sanitizer run.
+ */
+__attribute__((no_sanitize("thread"))) BOOL FIRIsLoggableLevel(FIRLoggerLevel loggerLevel,
+                                                               BOOL analyticsComponent) {
+  FIRLoggerInitialize();
+  if (sFIRAnalyticsDebugMode && analyticsComponent) {
+    return YES;
+  }
+  return GULIsLoggableLevel((GULLoggerLevel)loggerLevel);
+}
+
+void FIRLogBasic(FIRLoggerLevel level,
+                 NSString *category,
+                 NSString *messageCode,
+                 NSString *message,
+                 va_list args_ptr) {
+  FIRLoggerInitialize();
+  GULOSLogBasic((GULLoggerLevel)level, kFIRLoggerSubsystem, category,
+                sFIRAnalyticsDebugMode && [kFIRLoggerAnalytics isEqualToString:category],
+                messageCode, message, args_ptr);
+}
+
+/**
+ * Generates the logging functions using macros.
+ *
+ * Calling FIRLogError(kFIRLoggerCore, @"I-COR000001", @"Configure %@ failed.", @"blah") shows:
+ * yyyy-mm-dd hh:mm:ss.SSS sender[PID] <Error> [Firebase/Core][I-COR000001] Configure blah failed.
+ * Calling FIRLogDebug(kFIRLoggerCore, @"I-COR000001", @"Configure succeed.") shows:
+ * yyyy-mm-dd hh:mm:ss.SSS sender[PID] <Debug> [Firebase/Core][I-COR000001] Configure succeed.
+ */
+#define FIR_LOGGING_FUNCTION(level)                                                       \
+  void FIRLog##level(NSString *category, NSString *messageCode, NSString *message, ...) { \
+    va_list args_ptr;                                                                     \
+    va_start(args_ptr, message);                                                          \
+    FIRLogBasic(FIRLoggerLevel##level, category, messageCode, message, args_ptr);         \
+    va_end(args_ptr);                                                                     \
+  }
+
+FIR_LOGGING_FUNCTION(Error)
+FIR_LOGGING_FUNCTION(Warning)
+FIR_LOGGING_FUNCTION(Notice)
+FIR_LOGGING_FUNCTION(Info)
+FIR_LOGGING_FUNCTION(Debug)
+
+#undef FIR_LOGGING_FUNCTION
+
+#pragma mark - FIRLoggerWrapper
+
+@implementation FIRLoggerWrapper
+
++ (void)logWithLevel:(FIRLoggerLevel)level
+             service:(NSString *)service
+                code:(NSString *)code
+             message:(NSString *)message {
+  FIRLogBasic(level, service, code, message, NULL);
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIROptions.m

@@ -0,0 +1,487 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "FirebaseCore/Extension/FIRAppInternal.h"
+#import "FirebaseCore/Extension/FIRLogger.h"
+#import "FirebaseCore/Extension/FIROptionsInternal.h"
+#import "FirebaseCore/Sources/FIRBundleUtil.h"
+#import "FirebaseCore/Sources/Public/FirebaseCore/FIRVersion.h"
+
+// Keys for the strings in the plist file.
+NSString *const kFIRAPIKey = @"API_KEY";
+NSString *const kFIRTrackingID = @"TRACKING_ID";
+NSString *const kFIRGoogleAppID = @"GOOGLE_APP_ID";
+NSString *const kFIRClientID = @"CLIENT_ID";
+NSString *const kFIRGCMSenderID = @"GCM_SENDER_ID";
+NSString *const kFIRAndroidClientID = @"ANDROID_CLIENT_ID";
+NSString *const kFIRDatabaseURL = @"DATABASE_URL";
+NSString *const kFIRStorageBucket = @"STORAGE_BUCKET";
+// The key to locate the expected bundle identifier in the plist file.
+NSString *const kFIRBundleID = @"BUNDLE_ID";
+// The key to locate the project identifier in the plist file.
+NSString *const kFIRProjectID = @"PROJECT_ID";
+
+NSString *const kFIRIsMeasurementEnabled = @"IS_MEASUREMENT_ENABLED";
+NSString *const kFIRIsAnalyticsCollectionEnabled = @"FIREBASE_ANALYTICS_COLLECTION_ENABLED";
+NSString *const kFIRIsAnalyticsCollectionDeactivated = @"FIREBASE_ANALYTICS_COLLECTION_DEACTIVATED";
+
+// Library version ID formatted like:
+// @"5"     // Major version (one or more digits)
+// @"04"    // Minor version (exactly 2 digits)
+// @"01"    // Build number (exactly 2 digits)
+// @"000";  // Fixed "000"
+NSString *kFIRLibraryVersionID;
+
+// Plist file name.
+NSString *const kServiceInfoFileName = @"GoogleService-Info";
+// Plist file type.
+NSString *const kServiceInfoFileType = @"plist";
+
+// Exception raised from attempting to modify a FIROptions after it's been copied to a FIRApp.
+NSString *const kFIRExceptionBadModification =
+    @"Attempted to modify options after it's set on FIRApp. Please modify all properties before "
+    @"initializing FIRApp.";
+
+@interface FIROptions ()
+
+/**
+ * This property maintains the actual configuration key-value pairs.
+ */
+@property(nonatomic, readwrite) NSMutableDictionary *optionsDictionary;
+
+/**
+ * Calls `analyticsOptionsDictionaryWithInfoDictionary:` using [NSBundle mainBundle].infoDictionary.
+ * It combines analytics options from both the infoDictionary and the GoogleService-Info.plist.
+ * Values which are present in the main plist override values from the GoogleService-Info.plist.
+ */
+@property(nonatomic, readonly) NSDictionary *analyticsOptionsDictionary;
+
+/**
+ * Combination of analytics options from both the infoDictionary and the GoogleService-Info.plist.
+ * Values which are present in the infoDictionary override values from the GoogleService-Info.plist.
+ */
+- (NSDictionary *)analyticsOptionsDictionaryWithInfoDictionary:(NSDictionary *)infoDictionary;
+
+/**
+ * Throw exception if editing is locked when attempting to modify an option.
+ */
+- (void)checkEditingLocked;
+
+@end
+
+@implementation FIROptions {
+  /// Backing variable for self.analyticsOptionsDictionary.
+  NSDictionary *_analyticsOptionsDictionary;
+}
+
+static FIROptions *sDefaultOptions = nil;
+static NSDictionary *sDefaultOptionsDictionary = nil;
+static dispatch_once_t sDefaultOptionsOnceToken;
+static dispatch_once_t sDefaultOptionsDictionaryOnceToken;
+
+#pragma mark - Public only for internal class methods
+
++ (FIROptions *)defaultOptions {
+  dispatch_once(&sDefaultOptionsOnceToken, ^{
+    NSDictionary *defaultOptionsDictionary = [self defaultOptionsDictionary];
+    if (defaultOptionsDictionary != nil) {
+      sDefaultOptions =
+          [[FIROptions alloc] initInternalWithOptionsDictionary:defaultOptionsDictionary];
+    }
+  });
+
+  return sDefaultOptions;
+}
+
+#pragma mark - Private class methods
+
++ (NSDictionary *)defaultOptionsDictionary {
+  dispatch_once(&sDefaultOptionsDictionaryOnceToken, ^{
+    NSString *plistFilePath = [FIROptions plistFilePathWithName:kServiceInfoFileName];
+    if (plistFilePath == nil) {
+      return;
+    }
+    sDefaultOptionsDictionary = [NSDictionary dictionaryWithContentsOfFile:plistFilePath];
+    if (sDefaultOptionsDictionary == nil) {
+      FIRLogError(kFIRLoggerCore, @"I-COR000011",
+                  @"The configuration file is not a dictionary: "
+                  @"'%@.%@'.",
+                  kServiceInfoFileName, kServiceInfoFileType);
+    }
+  });
+
+  return sDefaultOptionsDictionary;
+}
+
+// Returns the path of the plist file with a given file name.
++ (NSString *)plistFilePathWithName:(NSString *)fileName {
+  NSArray *bundles = [FIRBundleUtil relevantBundles];
+  NSString *plistFilePath =
+      [FIRBundleUtil optionsDictionaryPathWithResourceName:fileName
+                                               andFileType:kServiceInfoFileType
+                                                 inBundles:bundles];
+  if (plistFilePath == nil) {
+    FIRLogError(kFIRLoggerCore, @"I-COR000012", @"Could not locate configuration file: '%@.%@'.",
+                fileName, kServiceInfoFileType);
+  }
+  return plistFilePath;
+}
+
++ (void)resetDefaultOptions {
+  sDefaultOptions = nil;
+  sDefaultOptionsDictionary = nil;
+  sDefaultOptionsOnceToken = 0;
+  sDefaultOptionsDictionaryOnceToken = 0;
+}
+
+#pragma mark - Private instance methods
+
+- (instancetype)initInternalWithOptionsDictionary:(NSDictionary *)optionsDictionary {
+  self = [super init];
+  if (self) {
+    _optionsDictionary = [optionsDictionary mutableCopy];
+    _usingOptionsFromDefaultPlist = YES;
+  }
+  return self;
+}
+
+- (id)copyWithZone:(NSZone *)zone {
+  FIROptions *newOptions = [(FIROptions *)[[self class] allocWithZone:zone]
+      initInternalWithOptionsDictionary:self.optionsDictionary];
+  if (newOptions) {
+    newOptions.deepLinkURLScheme = self.deepLinkURLScheme;
+    newOptions.appGroupID = self.appGroupID;
+    newOptions.editingLocked = self.isEditingLocked;
+    newOptions.usingOptionsFromDefaultPlist = self.usingOptionsFromDefaultPlist;
+  }
+  return newOptions;
+}
+
+#pragma mark - Public instance methods
+
+- (instancetype)init {
+  // Unavailable.
+  [self doesNotRecognizeSelector:_cmd];
+  return nil;
+}
+
+- (instancetype)initWithContentsOfFile:(NSString *)plistPath {
+  self = [super init];
+  if (self) {
+    if (plistPath == nil) {
+      FIRLogError(kFIRLoggerCore, @"I-COR000013", @"The plist file path is nil.");
+      return nil;
+    }
+    _optionsDictionary = [[NSDictionary dictionaryWithContentsOfFile:plistPath] mutableCopy];
+    if (_optionsDictionary == nil) {
+      FIRLogError(kFIRLoggerCore, @"I-COR000014",
+                  @"The configuration file at %@ does not exist or "
+                  @"is not a well-formed plist file.",
+                  plistPath);
+      return nil;
+    }
+    // TODO: Do we want to validate the dictionary here? It says we do that already in
+    // the public header.
+  }
+  return self;
+}
+
+- (instancetype)initWithGoogleAppID:(NSString *)googleAppID GCMSenderID:(NSString *)GCMSenderID {
+  self = [super init];
+  if (self) {
+    NSMutableDictionary *mutableOptionsDict = [NSMutableDictionary dictionary];
+    [mutableOptionsDict setValue:googleAppID forKey:kFIRGoogleAppID];
+    [mutableOptionsDict setValue:GCMSenderID forKey:kFIRGCMSenderID];
+    [mutableOptionsDict setValue:[[NSBundle mainBundle] bundleIdentifier] forKey:kFIRBundleID];
+    self.optionsDictionary = mutableOptionsDict;
+  }
+  return self;
+}
+
+- (NSString *)APIKey {
+  return self.optionsDictionary[kFIRAPIKey];
+}
+
+- (void)checkEditingLocked {
+  if (self.isEditingLocked) {
+    [NSException raise:kFirebaseCoreErrorDomain format:kFIRExceptionBadModification];
+  }
+}
+
+- (void)setAPIKey:(NSString *)APIKey {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRAPIKey] = [APIKey copy];
+}
+
+- (NSString *)clientID {
+  return self.optionsDictionary[kFIRClientID];
+}
+
+- (void)setClientID:(NSString *)clientID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRClientID] = [clientID copy];
+}
+
+- (NSString *)trackingID {
+  return self.optionsDictionary[kFIRTrackingID];
+}
+
+- (void)setTrackingID:(NSString *)trackingID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRTrackingID] = [trackingID copy];
+}
+
+- (NSString *)GCMSenderID {
+  return self.optionsDictionary[kFIRGCMSenderID];
+}
+
+- (void)setGCMSenderID:(NSString *)GCMSenderID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRGCMSenderID] = [GCMSenderID copy];
+}
+
+- (NSString *)projectID {
+  return self.optionsDictionary[kFIRProjectID];
+}
+
+- (void)setProjectID:(NSString *)projectID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRProjectID] = [projectID copy];
+}
+
+- (NSString *)androidClientID {
+  return self.optionsDictionary[kFIRAndroidClientID];
+}
+
+- (void)setAndroidClientID:(NSString *)androidClientID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRAndroidClientID] = [androidClientID copy];
+}
+
+- (NSString *)googleAppID {
+  return self.optionsDictionary[kFIRGoogleAppID];
+}
+
+- (void)setGoogleAppID:(NSString *)googleAppID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRGoogleAppID] = [googleAppID copy];
+}
+
+- (NSString *)libraryVersionID {
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    // The unit tests are set up to catch anything that does not properly convert.
+    NSString *version = FIRFirebaseVersion();
+    NSArray *components = [version componentsSeparatedByString:@"."];
+    NSString *major = [NSString stringWithFormat:@"%02d", [[components objectAtIndex:0] intValue]];
+    NSString *minor = [NSString stringWithFormat:@"%02d", [[components objectAtIndex:1] intValue]];
+    NSString *patch = [NSString stringWithFormat:@"%02d", [[components objectAtIndex:2] intValue]];
+    kFIRLibraryVersionID = [NSString stringWithFormat:@"%@%@%@000", major, minor, patch];
+  });
+  return kFIRLibraryVersionID;
+}
+
+- (void)setLibraryVersionID:(NSString *)libraryVersionID {
+  _optionsDictionary[kFIRLibraryVersionID] = [libraryVersionID copy];
+}
+
+- (NSString *)databaseURL {
+  return self.optionsDictionary[kFIRDatabaseURL];
+}
+
+- (void)setDatabaseURL:(NSString *)databaseURL {
+  [self checkEditingLocked];
+
+  _optionsDictionary[kFIRDatabaseURL] = [databaseURL copy];
+}
+
+- (NSString *)storageBucket {
+  return self.optionsDictionary[kFIRStorageBucket];
+}
+
+- (void)setStorageBucket:(NSString *)storageBucket {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRStorageBucket] = [storageBucket copy];
+}
+
+- (void)setDeepLinkURLScheme:(NSString *)deepLinkURLScheme {
+  [self checkEditingLocked];
+  _deepLinkURLScheme = [deepLinkURLScheme copy];
+}
+
+- (NSString *)bundleID {
+  return self.optionsDictionary[kFIRBundleID];
+}
+
+- (void)setBundleID:(NSString *)bundleID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRBundleID] = [bundleID copy];
+}
+
+- (void)setAppGroupID:(NSString *)appGroupID {
+  [self checkEditingLocked];
+  _appGroupID = [appGroupID copy];
+}
+
+#pragma mark - Equality
+
+- (BOOL)isEqual:(id)object {
+  if (!object || ![object isKindOfClass:[FIROptions class]]) {
+    return NO;
+  }
+
+  return [self isEqualToOptions:(FIROptions *)object];
+}
+
+- (BOOL)isEqualToOptions:(FIROptions *)options {
+  // Skip any non-FIROptions classes.
+  if (![options isKindOfClass:[FIROptions class]]) {
+    return NO;
+  }
+
+  // Check the internal dictionary and custom properties for differences.
+  if (![options.optionsDictionary isEqualToDictionary:self.optionsDictionary]) {
+    return NO;
+  }
+
+  // Validate extra properties not contained in the dictionary. Only validate it if one of the
+  // objects has the property set.
+  if ((options.deepLinkURLScheme != nil || self.deepLinkURLScheme != nil) &&
+      ![options.deepLinkURLScheme isEqualToString:self.deepLinkURLScheme]) {
+    return NO;
+  }
+
+  if ((options.appGroupID != nil || self.appGroupID != nil) &&
+      ![options.appGroupID isEqualToString:self.appGroupID]) {
+    return NO;
+  }
+
+  // Validate the Analytics options haven't changed with the Info.plist.
+  if (![options.analyticsOptionsDictionary isEqualToDictionary:self.analyticsOptionsDictionary]) {
+    return NO;
+  }
+
+  // We don't care about the `editingLocked` or `usingOptionsFromDefaultPlist` properties since
+  // those relate to lifecycle and construction, we only care if the contents of the options
+  // themselves are equal.
+  return YES;
+}
+
+- (NSUInteger)hash {
+  // This is strongly recommended for any object that implements a custom `isEqual:` method to
+  // ensure that dictionary and set behavior matches other `isEqual:` checks.
+  // Note: `self.analyticsOptionsDictionary` was left out here since it solely relies on the
+  // contents of the main bundle's `Info.plist`. We should avoid reading that file and the contents
+  // should be identical.
+  return self.optionsDictionary.hash ^ self.deepLinkURLScheme.hash ^ self.appGroupID.hash;
+}
+
+#pragma mark - Internal instance methods
+
+- (NSDictionary *)analyticsOptionsDictionaryWithInfoDictionary:(NSDictionary *)infoDictionary {
+  if (_analyticsOptionsDictionary == nil) {
+    NSMutableDictionary *tempAnalyticsOptions = [[NSMutableDictionary alloc] init];
+    NSArray *measurementKeys = @[
+      kFIRIsMeasurementEnabled, kFIRIsAnalyticsCollectionEnabled,
+      kFIRIsAnalyticsCollectionDeactivated
+    ];
+    for (NSString *key in measurementKeys) {
+      id value = infoDictionary[key] ?: self.optionsDictionary[key] ?: nil;
+      if (!value) {
+        continue;
+      }
+      tempAnalyticsOptions[key] = value;
+    }
+    _analyticsOptionsDictionary = tempAnalyticsOptions;
+  }
+  return _analyticsOptionsDictionary;
+}
+
+- (NSDictionary *)analyticsOptionsDictionary {
+  return [self analyticsOptionsDictionaryWithInfoDictionary:[NSBundle mainBundle].infoDictionary];
+}
+
+/**
+ * Whether or not Measurement was enabled. Measurement is enabled unless explicitly disabled in
+ * GoogleService-Info.plist. This uses the old plist flag IS_MEASUREMENT_ENABLED, which should still
+ * be supported.
+ */
+- (BOOL)isMeasurementEnabled {
+  if (self.isAnalyticsCollectionDeactivated) {
+    return NO;
+  }
+  NSNumber *value = self.analyticsOptionsDictionary[kFIRIsMeasurementEnabled];
+  if (value == nil) {
+    // TODO: This could probably be cleaned up since FIROptions shouldn't know about FIRApp or have
+    //       to check if it's the default app. The FIROptions instance can't be modified after
+    //       `+configure` is called, so it's not a good place to copy it either in case the flag is
+    //       changed at runtime.
+
+    // If no values are set for Analytics, fall back to the global collection switch in FIRApp.
+    // Analytics only supports the default FIRApp, so check that first.
+    if (![FIRApp isDefaultAppConfigured]) {
+      return NO;
+    }
+
+    // Fall back to the default app's collection switch when the key is not in the dictionary.
+    return [FIRApp defaultApp].isDataCollectionDefaultEnabled;
+  }
+  return [value boolValue];
+}
+
+- (BOOL)isAnalyticsCollectionExplicitlySet {
+  // If it's de-activated, it classifies as explicitly set. If not, it's not a good enough
+  // indication that the developer wants FirebaseAnalytics enabled so continue checking.
+  if (self.isAnalyticsCollectionDeactivated) {
+    return YES;
+  }
+
+  // Check if the current Analytics flag is set.
+  id collectionEnabledObject = self.analyticsOptionsDictionary[kFIRIsAnalyticsCollectionEnabled];
+  if (collectionEnabledObject && [collectionEnabledObject isKindOfClass:[NSNumber class]]) {
+    // It doesn't matter what the value is, it's explicitly set.
+    return YES;
+  }
+
+  // Check if the old measurement flag is set.
+  id measurementEnabledObject = self.analyticsOptionsDictionary[kFIRIsMeasurementEnabled];
+  if (measurementEnabledObject && [measurementEnabledObject isKindOfClass:[NSNumber class]]) {
+    // It doesn't matter what the value is, it's explicitly set.
+    return YES;
+  }
+
+  // No flags are set to explicitly enable or disable FirebaseAnalytics.
+  return NO;
+}
+
+- (BOOL)isAnalyticsCollectionEnabled {
+  if (self.isAnalyticsCollectionDeactivated) {
+    return NO;
+  }
+  NSNumber *value = self.analyticsOptionsDictionary[kFIRIsAnalyticsCollectionEnabled];
+  if (value == nil) {
+    return self.isMeasurementEnabled;  // Fall back to older plist flag.
+  }
+  return [value boolValue];
+}
+
+- (BOOL)isAnalyticsCollectionDeactivated {
+  NSNumber *value = self.analyticsOptionsDictionary[kFIRIsAnalyticsCollectionDeactivated];
+  if (value == nil) {
+    return NO;  // Analytics Collection is not deactivated when the key is not in the dictionary.
+  }
+  return [value boolValue];
+}
+
+@end

Pods/FirebaseCore/FirebaseCore/Sources/FIRTimestamp.m

@@ -0,0 +1,152 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FirebaseCore/Sources/FIRTimestampInternal.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+static const int kNanosPerSecond = 1000000000;
+
+@implementation FIRTimestamp (Internal)
+
+#pragma mark - Internal public methods
+
+- (NSString *)ISO8601String {
+  NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+  formatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ss";
+  formatter.timeZone = [NSTimeZone timeZoneWithName:@"UTC"];
+  NSDate *secondsDate = [NSDate dateWithTimeIntervalSince1970:self.seconds];
+  NSString *secondsString = [formatter stringFromDate:secondsDate];
+  if (secondsString.length != 19) {
+    [NSException raise:@"Invalid ISO string" format:@"Invalid ISO string: %@", secondsString];
+  }
+
+  NSString *nanosString = [NSString stringWithFormat:@"%09d", self.nanoseconds];
+  return [NSString stringWithFormat:@"%@.%@Z", secondsString, nanosString];
+}
+
+@end
+
+@implementation FIRTimestamp
+
+#pragma mark - Constructors
+
++ (instancetype)timestampWithDate:(NSDate *)date {
+  double secondsDouble;
+  double fraction = modf(date.timeIntervalSince1970, &secondsDouble);
+  // GCP Timestamps always have non-negative nanos.
+  if (fraction < 0) {
+    fraction += 1.0;
+    secondsDouble -= 1.0;
+  }
+  int64_t seconds = (int64_t)secondsDouble;
+  int32_t nanos = (int32_t)(fraction * kNanosPerSecond);
+  return [[FIRTimestamp alloc] initWithSeconds:seconds nanoseconds:nanos];
+}
+
++ (instancetype)timestampWithSeconds:(int64_t)seconds nanoseconds:(int32_t)nanoseconds {
+  return [[FIRTimestamp alloc] initWithSeconds:seconds nanoseconds:nanoseconds];
+}
+
++ (instancetype)timestamp {
+  return [FIRTimestamp timestampWithDate:[NSDate date]];
+}
+
+- (instancetype)initWithSeconds:(int64_t)seconds nanoseconds:(int32_t)nanoseconds {
+  self = [super init];
+  if (self) {
+    if (nanoseconds < 0) {
+      [NSException raise:@"Invalid timestamp"
+                  format:@"Timestamp nanoseconds out of range: %d", nanoseconds];
+    }
+    if (nanoseconds >= 1e9) {
+      [NSException raise:@"Invalid timestamp"
+                  format:@"Timestamp nanoseconds out of range: %d", nanoseconds];
+    }
+    // Midnight at the beginning of 1/1/1 is the earliest timestamp supported.
+    if (seconds < -62135596800L) {
+      [NSException raise:@"Invalid timestamp"
+                  format:@"Timestamp seconds out of range: %lld", seconds];
+    }
+    // This will break in the year 10,000.
+    if (seconds >= 253402300800L) {
+      [NSException raise:@"Invalid timestamp"
+                  format:@"Timestamp seconds out of range: %lld", seconds];
+    }
+
+    _seconds = seconds;
+    _nanoseconds = nanoseconds;
+  }
+  return self;
+}
+
+#pragma mark - NSObject methods
+
+- (BOOL)isEqual:(id)object {
+  if (self == object) {
+    return YES;
+  }
+  if (![object isKindOfClass:[FIRTimestamp class]]) {
+    return NO;
+  }
+  return [self isEqualToTimestamp:(FIRTimestamp *)object];
+}
+
+- (NSUInteger)hash {
+  return (NSUInteger)((self.seconds >> 32) ^ self.seconds ^ self.nanoseconds);
+}
+
+- (NSString *)description {
+  return [NSString stringWithFormat:@"<FIRTimestamp: seconds=%lld nanoseconds=%d>", self.seconds,
+                                    self.nanoseconds];
+}
+
+/** Implements NSCopying without actually copying because timestamps are immutable. */
+- (id)copyWithZone:(__unused NSZone *_Nullable)zone {
+  return self;
+}
+
+#pragma mark - Public methods
+
+- (NSDate *)dateValue {
+  NSTimeInterval interval = (NSTimeInterval)self.seconds + ((NSTimeInterval)self.nanoseconds) / 1e9;
+  return [NSDate dateWithTimeIntervalSince1970:interval];
+}
+
+- (NSComparisonResult)compare:(FIRTimestamp *)other {
+  if (self.seconds < other.seconds) {
+    return NSOrderedAscending;
+  } else if (self.seconds > other.seconds) {
+    return NSOrderedDescending;
+  }
+
+  if (self.nanoseconds < other.nanoseconds) {
+    return NSOrderedAscending;
+  } else if (self.nanoseconds > other.nanoseconds) {
+    return NSOrderedDescending;
+  }
+  return NSOrderedSame;
+}
+
+#pragma mark - Private methods
+
+- (BOOL)isEqualToTimestamp:(FIRTimestamp *)other {
+  return [self compare:other] == NSOrderedSame;
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/FIRTimestampInternal.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FirebaseCore/Sources/Public/FirebaseCore/FIRTimestamp.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** Internal FIRTimestamp API we don't want exposed in our public header files. */
+@interface FIRTimestamp (Internal)
+
+/**
+ * Converts the given date to an ISO 8601 timestamp string, useful for rendering in JSON.
+ *
+ * ISO 8601 dates times in UTC look like this: "1912-04-14T23:40:00.000000000Z".
+ *
+ * @see http://www.ecma-international.org/ecma-262/6.0/#sec-date-time-string-format
+ */
+- (NSString *)ISO8601String;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/FIRVersion.m

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FirebaseCore/Sources/Public/FirebaseCore/FIRVersion.h"
+
+#ifndef Firebase_VERSION
+#error "Firebase_VERSION is not defined: add -DFirebase_VERSION=... to the build invocation"
+#endif
+
+// The following two macros supply the incantation so that the C
+// preprocessor does not try to parse the version as a floating
+// point number. See
+// https://www.guyrutenberg.com/2008/12/20/expanding-macros-into-string-constants-in-c/
+#define STR(x) STR_EXPAND(x)
+#define STR_EXPAND(x) #x
+
+NSString* FIRFirebaseVersion(void) {
+  return @STR(Firebase_VERSION);
+}

Pods/FirebaseCore/FirebaseCore/Sources/Public/FirebaseCore/FIRApp.h

@@ -0,0 +1,129 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIROptions;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** A block that takes a BOOL and has no return value. */
+typedef void (^FIRAppVoidBoolCallback)(BOOL success)
+    NS_SWIFT_UNAVAILABLE("Use Swift's closure syntax instead.");
+
+/**
+ * The entry point of Firebase SDKs.
+ *
+ * Initialize and configure `FirebaseApp` using `FirebaseApp.configure()`
+ * or other customized ways as shown below.
+ *
+ * The logging system has two modes: default mode and debug mode. In default mode, only logs with
+ * log level Notice, Warning and Error will be sent to device. In debug mode, all logs will be sent
+ * to device. The log levels that Firebase uses are consistent with the ASL log levels.
+ *
+ * Enable debug mode by passing the `-FIRDebugEnabled` argument to the application. You can add this
+ * argument in the application's Xcode scheme. When debug mode is enabled via `-FIRDebugEnabled`,
+ * further executions of the application will also be in debug mode. In order to return to default
+ * mode, you must explicitly disable the debug mode with the application argument
+ * `-FIRDebugDisabled`.
+ *
+ * It is also possible to change the default logging level in code by calling
+ * `FirebaseConfiguration.shared.setLoggerLevel(_:)` with the desired level.
+ */
+NS_SWIFT_NAME(FirebaseApp)
+@interface FIRApp : NSObject
+
+/**
+ * Configures a default Firebase app. Raises an exception if any configuration step fails. The
+ * default app is named "__FIRAPP_DEFAULT". This method should be called after the app is launched
+ * and before using Firebase services. This method should be called from the main thread and
+ * contains synchronous file I/O (reading GoogleService-Info.plist from disk).
+ */
++ (void)configure;
+
+/**
+ * Configures the default Firebase app with the provided options. The default app is named
+ * "__FIRAPP_DEFAULT". Raises an exception if any configuration step fails. This method should be
+ * called from the main thread.
+ *
+ * @param options The Firebase application options used to configure the service.
+ */
++ (void)configureWithOptions:(FIROptions *)options NS_SWIFT_NAME(configure(options:));
+
+/**
+ * Configures a Firebase app with the given name and options. Raises an exception if any
+ * configuration step fails. This method should be called from the main thread.
+ *
+ * @param name The application's name given by the developer. The name should should only contain
+               Letters, Numbers and Underscore.
+ * @param options The Firebase application options used to configure the services.
+ */
+// clang-format off
++ (void)configureWithName:(NSString *)name
+                  options:(FIROptions *)options NS_SWIFT_NAME(configure(name:options:));
+// clang-format on
+
+/**
+ * Returns the default app, or `nil` if the default app does not exist.
+ */
++ (nullable FIRApp *)defaultApp NS_SWIFT_NAME(app());
+
+/**
+ * Returns a previously created `FirebaseApp` instance with the given name, or `nil` if no such app
+ * exists. This method is thread safe.
+ */
++ (nullable FIRApp *)appNamed:(NSString *)name NS_SWIFT_NAME(app(name:));
+
+/**
+ * Returns the set of all extant `FirebaseApp` instances, or `nil` if there are no `FirebaseApp`
+ * instances. This method is thread safe.
+ */
+@property(class, readonly, nullable) NSDictionary<NSString *, FIRApp *> *allApps;
+
+/**
+ * Cleans up the current `FirebaseApp`, freeing associated data and returning its name to the pool
+ * for future use. This method is thread safe.
+ */
+- (void)deleteApp:(void (^)(BOOL success))completion;
+
+/**
+ * `FirebaseApp` instances should not be initialized directly. Call `FirebaseApp.configure()`,
+ * `FirebaseApp.configure(options:)`, or `FirebaseApp.configure(name:options:)` directly.
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Gets the name of this app.
+ */
+@property(nonatomic, copy, readonly) NSString *name;
+
+/**
+ * Gets a copy of the options for this app. These are non-modifiable.
+ */
+@property(nonatomic, copy, readonly) FIROptions *options;
+
+/**
+ * Gets or sets whether automatic data collection is enabled for all products. Defaults to `true`
+ * unless `FirebaseDataCollectionDefaultEnabled` is set to `NO` in your app's Info.plist. This value
+ * is persisted across runs of the app so that it can be set once when users have consented to
+ * collection.
+ */
+@property(nonatomic, readwrite, getter=isDataCollectionDefaultEnabled)
+    BOOL dataCollectionDefaultEnabled;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/Public/FirebaseCore/FIRConfiguration.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "FIRLoggerLevel.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * This interface provides global level properties that the developer can tweak.
+ */
+NS_SWIFT_NAME(FirebaseConfiguration)
+@interface FIRConfiguration : NSObject
+
+/** Returns the shared configuration object. */
+@property(class, nonatomic, readonly) FIRConfiguration *sharedInstance NS_SWIFT_NAME(shared);
+
+/**
+ * Sets the logging level for internal Firebase logging. Firebase will only log messages
+ * that are logged at or below `loggerLevel`. The messages are logged both to the Xcode
+ * console and to the device's log. Note that if an app is running from AppStore, it will
+ * never log above `.notice` even if `loggerLevel` is set to a higher (more verbose)
+ * setting.
+ *
+ * @param loggerLevel The maximum logging level. The default level is set to FIRLoggerLevelNotice.
+ */
+- (void)setLoggerLevel:(FIRLoggerLevel)loggerLevel;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/Public/FirebaseCore/FIRLoggerLevel.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Note that importing GULLoggerLevel.h will lead to a non-modular header
+// import error.
+
+/**
+ * The log levels used by internal logging.
+ */
+typedef NS_ENUM(NSInteger, FIRLoggerLevel) {
+  /** Error level, matches ASL_LEVEL_ERR. */
+  FIRLoggerLevelError = 3,
+  /** Warning level, matches ASL_LEVEL_WARNING. */
+  FIRLoggerLevelWarning = 4,
+  /** Notice level, matches ASL_LEVEL_NOTICE. */
+  FIRLoggerLevelNotice = 5,
+  /** Info level, matches ASL_LEVEL_INFO. */
+  FIRLoggerLevelInfo = 6,
+  /** Debug level, matches ASL_LEVEL_DEBUG. */
+  FIRLoggerLevelDebug = 7,
+  /** Minimum log level. */
+  FIRLoggerLevelMin = FIRLoggerLevelError,
+  /** Maximum log level. */
+  FIRLoggerLevelMax = FIRLoggerLevelDebug
+} NS_SWIFT_NAME(FirebaseLoggerLevel);

Pods/FirebaseCore/FirebaseCore/Sources/Public/FirebaseCore/FIROptions.h

@@ -0,0 +1,131 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * This class provides constant fields of Google APIs.
+ */
+NS_SWIFT_NAME(FirebaseOptions)
+@interface FIROptions : NSObject <NSCopying>
+
+/**
+ * Returns the default options. The first time this is called it synchronously reads
+ * GoogleService-Info.plist from disk.
+ */
++ (nullable FIROptions *)defaultOptions NS_SWIFT_NAME(defaultOptions());
+
+/**
+ * An API key used for authenticating requests from your Apple app, e.g.
+ * The key must begin with "A" and contain exactly 39 alphanumeric characters, used to identify your
+ * app to Google servers.
+ */
+@property(nonatomic, copy, nullable) NSString *APIKey NS_SWIFT_NAME(apiKey);
+
+/**
+ * The bundle ID for the application. Defaults to `Bundle.main.bundleIdentifier` when not set
+ * manually or in a plist.
+ */
+@property(nonatomic, copy) NSString *bundleID;
+
+/**
+ * The OAuth2 client ID for Apple applications used to authenticate Google users, for example
+ * @"12345.apps.googleusercontent.com", used for signing in with Google.
+ */
+@property(nonatomic, copy, nullable) NSString *clientID;
+
+/**
+ * Unused.
+ */
+@property(nonatomic, copy, nullable) NSString *trackingID DEPRECATED_ATTRIBUTE;
+
+/**
+ * The Project Number from the Google Developer's console, for example @"012345678901", used to
+ * configure Firebase Cloud Messaging.
+ */
+@property(nonatomic, copy) NSString *GCMSenderID NS_SWIFT_NAME(gcmSenderID);
+
+/**
+ * The Project ID from the Firebase console, for example @"abc-xyz-123".
+ */
+@property(nonatomic, copy, nullable) NSString *projectID;
+
+/**
+ * Unused.
+ */
+@property(nonatomic, copy, nullable) NSString *androidClientID DEPRECATED_ATTRIBUTE;
+
+/**
+ * The Google App ID that is used to uniquely identify an instance of an app.
+ */
+@property(nonatomic, copy) NSString *googleAppID;
+
+/**
+ * The database root URL, e.g. @"http://abc-xyz-123.firebaseio.com".
+ */
+@property(nonatomic, copy, nullable) NSString *databaseURL;
+
+/**
+ * The URL scheme used to set up Durable Deep Link service.
+ */
+@property(nonatomic, copy, nullable) NSString *deepLinkURLScheme;
+
+/**
+ * The Google Cloud Storage bucket name, e.g. @"abc-xyz-123.storage.firebase.com".
+ */
+@property(nonatomic, copy, nullable) NSString *storageBucket;
+
+/**
+ * The App Group identifier to share data between the application and the application extensions.
+ * The App Group must be configured in the application and on the Apple Developer Portal. Default
+ * value `nil`.
+ */
+@property(nonatomic, copy, nullable) NSString *appGroupID;
+
+/**
+ * Initializes a customized instance of FirebaseOptions from the file at the given plist file path.
+ * This will read the file synchronously from disk.
+ * For example:
+ * ```swift
+ *   if let path = Bundle.main.path(forResource:"GoogleServices-Info", ofType:"plist") {
+ *       let options = FirebaseOptions(contentsOfFile: path)
+ *   }
+ * ```
+ * Note that it is not possible to customize `FirebaseOptions` for Firebase Analytics which expects
+ * a static file named `GoogleServices-Info.plist` -
+ * https://github.com/firebase/firebase-ios-sdk/issues/230.
+ * Returns `nil` if the plist file does not exist or is invalid.
+ */
+- (nullable instancetype)initWithContentsOfFile:(NSString *)plistPath NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Initializes a customized instance of `FirebaseOptions` with required fields. Use the mutable
+ * properties to modify fields for configuring specific services. Note that it is not possible to
+ * customize `FirebaseOptions` for Firebase Analytics which expects a static file named
+ * `GoogleServices-Info.plist` - https://github.com/firebase/firebase-ios-sdk/issues/230.
+ */
+- (instancetype)initWithGoogleAppID:(NSString *)googleAppID
+                        GCMSenderID:(NSString *)GCMSenderID
+    NS_SWIFT_NAME(init(googleAppID:gcmSenderID:))NS_DESIGNATED_INITIALIZER;
+
+/** Unavailable. Please use `init(contentsOfFile:)` or `init(googleAppID:gcmSenderID:)` instead. */
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/Public/FirebaseCore/FIRTimestamp.h

@@ -0,0 +1,89 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * A Timestamp represents a point in time independent of any time zone or calendar, represented as
+ * seconds and fractions of seconds at nanosecond resolution in UTC Epoch time. It is encoded using
+ * the Proleptic Gregorian Calendar which extends the Gregorian calendar backwards to year one. It
+ * is encoded assuming all minutes are 60 seconds long, i.e. leap seconds are "smeared" so that no
+ * leap second table is needed for interpretation. Range is from 0001-01-01T00:00:00Z to
+ * 9999-12-31T23:59:59.999999999Z. By restricting to that range, we ensure that we can convert to
+ * and from  RFC 3339 date strings.
+ *
+ * @see https://github.com/google/protobuf/blob/main/src/google/protobuf/timestamp.proto for the
+ * reference timestamp definition.
+ */
+NS_SWIFT_NAME(Timestamp)
+@interface FIRTimestamp : NSObject <NSCopying>
+
+/** :nodoc: */
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Creates a new timestamp.
+ *
+ * @param seconds the number of seconds since epoch.
+ * @param nanoseconds the number of nanoseconds after the seconds.
+ */
+- (instancetype)initWithSeconds:(int64_t)seconds
+                    nanoseconds:(int32_t)nanoseconds NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Creates a new timestamp.
+ *
+ * @param seconds the number of seconds since epoch.
+ * @param nanoseconds the number of nanoseconds after the seconds.
+ */
++ (instancetype)timestampWithSeconds:(int64_t)seconds nanoseconds:(int32_t)nanoseconds;
+
+/** Creates a new timestamp from the given date. */
++ (instancetype)timestampWithDate:(NSDate *)date;
+
+/** Creates a new timestamp with the current date / time. */
++ (instancetype)timestamp;
+
+/** Returns a new `Date` corresponding to this timestamp. This may lose precision. */
+- (NSDate *)dateValue;
+
+/**
+ * Returns the result of comparing the receiver with another timestamp.
+ * @param other the other timestamp to compare.
+ * @return `orderedAscending` if `other` is chronologically following self,
+ *     `orderedDescending` if `other` is chronologically preceding self,
+ *     `orderedSame` otherwise.
+ */
+- (NSComparisonResult)compare:(FIRTimestamp *)other;
+
+/**
+ * Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z.
+ * Must be from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z inclusive.
+ */
+@property(nonatomic, assign, readonly) int64_t seconds;
+
+/**
+ * Non-negative fractions of a second at nanosecond resolution. Negative second values with
+ * fractions must still have non-negative nanos values that count forward in time.
+ * Must be from 0 to 999,999,999 inclusive.
+ */
+@property(nonatomic, assign, readonly) int32_t nanoseconds;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/Public/FirebaseCore/FIRVersion.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** Returns the current version of Firebase. */
+NS_SWIFT_NAME(FirebaseVersion())
+NSString* FIRFirebaseVersion(void);
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/FirebaseCore/Sources/Public/FirebaseCore/FirebaseCore.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRApp.h"
+#import "FIRConfiguration.h"
+#import "FIRLoggerLevel.h"
+#import "FIROptions.h"
+#import "FIRTimestamp.h"
+#import "FIRVersion.h"

Pods/FirebaseCore/FirebaseCore/Sources/Resources/PrivacyInfo.xcprivacy

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+        <key>NSPrivacyTracking</key>
+        <false/>
+        <key>NSPrivacyTrackingDomains</key>
+        <array>
+        </array>
+        <key>NSPrivacyCollectedDataTypes</key>
+        <array>
+        </array>
+        <key>NSPrivacyAccessedAPITypes</key>
+        <array>
+                <dict>
+                        <key>NSPrivacyAccessedAPIType</key>
+                        <string>NSPrivacyAccessedAPICategoryUserDefaults</string>
+                        <key>NSPrivacyAccessedAPITypeReasons</key>
+                        <array>
+                                <string>CA92.1</string>
+                        </array>
+                </dict>
+        </array>
+</dict>
+</plist>
+

Pods/FirebaseCore/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
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+      including but not limited to software source code, documentation
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+
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+      designated in writing by the copyright owner as "Not a Contribution."
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
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+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      copyright license to reproduce, prepare Derivative Works of,
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+      cross-claim or counterclaim in a lawsuit) alleging that the Work
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Pods/FirebaseCore/README.md

@@ -0,0 +1,302 @@
+<p align="center">
+  <a href="https://cocoapods.org/pods/Firebase">
+    <img src="https://img.shields.io/github/v/release/Firebase/firebase-ios-sdk?style=flat&label=CocoaPods"/>
+  </a>
+  <a href="https://swiftpackageindex.com/firebase/firebase-ios-sdk">
+    <img src="https://img.shields.io/github/v/release/Firebase/firebase-ios-sdk?style=flat&label=Swift%20Package%20Index&color=red"/>
+  </a>
+  <a href="https://cocoapods.org/pods/Firebase">
+    <img src="https://img.shields.io/github/license/Firebase/firebase-ios-sdk?style=flat"/>
+  </a><br/>
+  <a href="https://swiftpackageindex.com/firebase/firebase-ios-sdk">
+    <img src="https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ffirebase%2Ffirebase-ios-sdk%2Fbadge%3Ftype%3Dplatforms"/>
+  </a>
+  <a href="https://swiftpackageindex.com/firebase/firebase-ios-sdk">
+    <img src="https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ffirebase%2Ffirebase-ios-sdk%2Fbadge%3Ftype%3Dswift-versions"/>
+  </a>
+</p>
+
+# Firebase Apple Open Source Development
+
+This repository contains the source code for all Apple platform Firebase SDKs except FirebaseAnalytics.
+
+Firebase is an app development platform with tools to help you build, grow, and
+monetize your app. More information about Firebase can be found on the
+[official Firebase website](https://firebase.google.com).
+
+## Installation
+
+See the subsections below for details about the different installation methods. Where
+available, it's recommended to install any libraries with a `Swift` suffix to get the
+best experience when writing your app in Swift.
+
+1. [Standard pod install](#standard-pod-install)
+2. [Swift Package Manager](#swift-package-manager)
+3. [Installing from the GitHub repo](#installing-from-github)
+4. [Experimental Carthage](#carthage-ios-only)
+
+### Standard pod install
+
+For instructions on the standard pod install, visit:
+[https://firebase.google.com/docs/ios/setup](https://firebase.google.com/docs/ios/setup).
+
+### Swift Package Manager
+
+Instructions for [Swift Package Manager](https://swift.org/package-manager/) support can be
+found in the [SwiftPackageManager.md](SwiftPackageManager.md) Markdown file.
+
+### Installing from GitHub
+
+These instructions can be used to access the Firebase repo at other branches,
+tags, or commits.
+
+#### Background
+
+See [the Podfile Syntax Reference](https://guides.cocoapods.org/syntax/podfile.html#pod)
+for instructions and options about overriding pod source locations.
+
+#### Accessing Firebase Source Snapshots
+
+All official releases are tagged in this repo and available via CocoaPods. To access a local
+source snapshot or unreleased branch, use Podfile directives like the following:
+
+To access FirebaseFirestore via a branch:
+```ruby
+pod 'FirebaseCore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'main'
+pod 'FirebaseFirestore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'main'
+```
+
+To access FirebaseMessaging via a checked-out version of the firebase-ios-sdk repo:
+```ruby
+pod 'FirebaseCore', :path => '/path/to/firebase-ios-sdk'
+pod 'FirebaseMessaging', :path => '/path/to/firebase-ios-sdk'
+```
+
+### Carthage (iOS only)
+
+Instructions for the experimental Carthage distribution can be found at
+[Carthage.md](Carthage.md).
+
+### Using Firebase from a Framework or a library
+
+For details on using Firebase from a Framework or a library, refer to [firebase_in_libraries.md](docs/firebase_in_libraries.md).
+
+## Development
+
+To develop Firebase software in this repository, ensure that you have at least
+the following software:
+
+* Xcode 15.2 (or later)
+
+CocoaPods is still the canonical way to develop, but much of the repo now supports
+development with Swift Package Manager.
+
+### CocoaPods
+
+Install the following:
+* CocoaPods 1.12.0 (or later)
+* [CocoaPods generate](https://github.com/square/cocoapods-generate)
+
+For the pod that you want to develop:
+
+```ruby
+pod gen Firebase{name here}.podspec --local-sources=./ --auto-open --platforms=ios
+```
+
+Note: If the CocoaPods cache is out of date, you may need to run
+`pod repo update` before the `pod gen` command.
+
+Note: Set the `--platforms` option to `macos` or `tvos` to develop/test for
+those platforms. Since 10.2, Xcode does not properly handle multi-platform
+CocoaPods workspaces.
+
+Firestore has a self-contained Xcode project. See
+[Firestore/README](Firestore/README.md) Markdown file.
+
+#### Development for Catalyst
+* `pod gen {name here}.podspec --local-sources=./ --auto-open --platforms=ios`
+* Check the Mac box in the App-iOS Build Settings
+* Sign the App in the Settings Signing & Capabilities tab
+* Click Pods in the Project Manager
+* Add Signing to the iOS host app and unit test targets
+* Select the Unit-unit scheme
+* Run it to build and test
+
+Alternatively, disable signing in each target:
+* Go to Build Settings tab
+* Click `+`
+* Select `Add User-Defined Setting`
+* Add `CODE_SIGNING_REQUIRED` setting with a value of `NO`
+
+### Swift Package Manager
+* To enable test schemes: `./scripts/setup_spm_tests.sh`
+* `open Package.swift` or double click `Package.swift` in Finder.
+* Xcode will open the project
+  * Choose a scheme for a library to build or test suite to run
+  * Choose a target platform by selecting the run destination along with the scheme
+
+### Adding a New Firebase Pod
+
+Refer to [AddNewPod](AddNewPod.md) Markdown file for details.
+
+### Managing Headers and Imports
+
+For information about managing headers and imports, see [HeadersImports](HeadersImports.md) Markdown file.
+
+### Code Formatting
+
+To ensure that the code is formatted consistently, run the script
+[./scripts/check.sh](https://github.com/firebase/firebase-ios-sdk/blob/main/scripts/check.sh)
+before creating a pull request (PR).
+
+GitHub Actions will verify that any code changes are done in a style-compliant
+way. Install `clang-format` and `mint`:
+
+```console
+brew install clang-format@18
+brew install mint
+```
+
+### Running Unit Tests
+
+Select a scheme and press Command-u to build a component and run its unit tests.
+
+### Running Sample Apps
+To run the sample apps and integration tests, you'll need a valid
+`GoogleService-Info.plist
+` file. The Firebase Xcode project contains dummy plist
+files without real values, but they can be replaced with real plist files. To get your own
+`GoogleService-Info.plist` files:
+
+1. Go to the [Firebase Console](https://console.firebase.google.com/)
+2. Create a new Firebase project, if you don't already have one
+3. For each sample app you want to test, create a new Firebase app with the sample app's bundle
+identifier (e.g., `com.google.Database-Example`)
+4. Download the resulting `GoogleService-Info.plist` and add it to the Xcode project.
+
+### Coverage Report Generation
+
+For coverage report generation instructions, see [scripts/code_coverage_report/README](scripts/code_coverage_report/README.md) Markdown file.
+
+## Specific Component Instructions
+See the sections below for any special instructions for those components.
+
+### Firebase Auth
+
+For specific Firebase Auth development, refer to the [Auth Sample README](FirebaseAuth/Tests/Sample/README.md) for instructions about
+building and running the FirebaseAuth pod along with various samples and tests.
+
+### Firebase Database
+
+The Firebase Database Integration tests can be run against a locally running Database Emulator
+or against a production instance.
+
+To run against a local emulator instance, invoke `./scripts/run_database_emulator.sh start` before
+running the integration test.
+
+To run against a production instance, provide a valid `GoogleServices-Info.plist` and copy it to
+`FirebaseDatabase/Tests/Resources/GoogleService-Info.plist`. Your Security Rule must be set to
+[public](https://firebase.google.com/docs/database/security/quickstart) while your tests are
+running.
+
+### Firebase Dynamic Links
+
+Firebase Dynamic Links is **deprecated** and should not be used in new projects. The service will shut down on August 25, 2025.
+
+Please see our [Dynamic Links Deprecation FAQ documentation](https://firebase.google.com/support/dynamic-links-faq) for more guidance.
+
+### Firebase Performance Monitoring
+
+For specific Firebase Performance Monitoring development, see
+[the Performance README](FirebasePerformance/README.md) for instructions about building the SDK
+and [the Performance TestApp README](FirebasePerformance/Tests/TestApp/README.md) for instructions about
+integrating Performance with the dev test App.
+
+### Firebase Storage
+
+To run the Storage Integration tests, follow the instructions in
+[StorageIntegration.swift](FirebaseStorage/Tests/Integration/StorageIntegration.swift).
+
+#### Push Notifications
+
+Push notifications can only be delivered to specially provisioned App IDs in the developer portal.
+In order to test receiving push notifications, you will need to:
+
+1. Change the bundle identifier of the sample app to something you own in your Apple Developer
+account and enable that App ID for push notifications.
+2. You'll also need to
+[upload your APNs Provider Authentication Key or certificate to the
+Firebase Console](https://firebase.google.com/docs/cloud-messaging/ios/certs)
+at **Project Settings > Cloud Messaging > [Your Firebase App]**.
+3. Ensure your iOS device is added to your Apple Developer portal as a test device.
+
+#### iOS Simulator
+
+The iOS Simulator cannot register for remote notifications and will not receive push notifications.
+To receive push notifications, follow the steps above and run the app on a physical device.
+
+### Vertex AI for Firebase
+
+See the [Vertex AI for Firebase README](FirebaseVertexAI#development) for
+instructions about building and testing the SDK.
+
+## Building with Firebase on Apple platforms
+
+Firebase provides official beta support for macOS, Catalyst, and tvOS. visionOS and watchOS
+are community supported. Thanks to community contributions for many of the multi-platform PRs.
+
+At this time, most of Firebase's products are available across Apple platforms. There are still
+a few gaps, especially on visionOS and watchOS. For details about the current support matrix, see
+[this chart](https://firebase.google.com/docs/ios/learn-more#firebase_library_support_by_platform)
+in Firebase's documentation.
+
+### visionOS
+
+Where supported, visionOS works as expected with the exception of Firestore via Swift Package
+Manager where it is required to use the source distribution.
+
+To enable the Firestore source distribution, quit Xcode and open the desired
+project from the command line with the `FIREBASE_SOURCE_FIRESTORE` environment
+variable: `open --env FIREBASE_SOURCE_FIRESTORE /path/to/project.xcodeproj`.
+To go back to using the binary distribution of Firestore, quit Xcode and open
+Xcode like normal, without the environment variable.
+
+### watchOS
+Thanks to contributions from the community, many of Firebase SDKs now compile, run unit tests, and
+work on watchOS. See the [Independent Watch App Sample](Example/watchOSSample).
+
+Keep in mind that watchOS is not officially supported by Firebase. While we can catch basic unit
+test issues with GitHub Actions, there may be some changes where the SDK no longer works as expected
+on watchOS. If you encounter this, please
+[file an issue](https://github.com/firebase/firebase-ios-sdk/issues).
+
+During app setup in the console, you may get to a step that mentions something like "Checking if the
+app has communicated with our servers". This relies on Analytics and will not work on watchOS.
+**It's safe to ignore the message and continue**, the rest of the SDKs will work as expected.
+
+#### Additional Crashlytics Notes
+* watchOS has limited support. Due to watchOS restrictions, mach exceptions and signal crashes are
+not recorded. (Crashes in SwiftUI are generated as mach exceptions, so will not be recorded)
+
+## Combine
+Thanks to contributions from the community, _FirebaseCombineSwift_ contains support for Apple's Combine
+framework. This module is currently under development and not yet supported for use in production
+environments. For more details, please refer to the [docs](FirebaseCombineSwift/README.md).
+
+## Roadmap
+
+See [Roadmap](ROADMAP.md) for more about the Firebase Apple SDK Open Source
+plans and directions.
+
+## Contributing
+
+See [Contributing](CONTRIBUTING.md) for more information on contributing to the Firebase
+Apple SDK.
+
+## License
+
+The contents of this repository are licensed under the
+[Apache License, version 2.0](http://www.apache.org/licenses/LICENSE-2.0).
+
+Your use of Firebase is governed by the
+[Terms of Service for Firebase Services](https://firebase.google.com/terms/).