Change where the iOS header files are found, to support newer versions of Cocoapods

Newer versions of Cocoapods do not copy header files from Pods that use frameworks. In order to reference those header files, change the logic for those to reference the headers in the framework, or for AdMob, set up a symlink because the headers are expected to be in a subfolder (that older versions of Cocoapods do set up)

PiperOrigin-RevId: 273823051

Author: a-maurice

admob/CMakeLists.txt

@@ -129,6 +129,14 @@ if(IOS)
     PRIVATE
       ${base_header_dir}/Google-Mobile-Ads-SDK
   )
+  string(CONCAT google_mobile_ads_framework_path
+    "${pods_dir}/Pods/Google-Mobile-Ads-SDK/"
+    "Frameworks/GoogleMobileAdsFramework-Current/GoogleMobileAds.framework")
+  # AdMob expects the header files to be in a subfolder, so set up a symlink to
+  # accomplish that.
+  symlink_framework_headers(firebase_admob ${pod_target_name}
+    ${google_mobile_ads_framework_path} GoogleMobileAds
+  )
 
   # Add a dependency to downloading the headers onto admob.
   add_dependencies(firebase_admob ${pod_target_name})

analytics/CMakeLists.txt

@@ -139,10 +139,12 @@ if(IOS)
 
   # Add the Cocoapod headers to the include directories
   set(base_header_dir "${pods_dir}/Pods/Headers/Public")
+  set(analytics_framework_path
+    "${pods_dir}/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework")
   target_include_directories(firebase_analytics
     PRIVATE
       ${base_header_dir}/FirebaseCore
-      ${base_header_dir}/FirebaseAnalytics/FirebaseAnalytics
+      ${analytics_framework_path}/Headers
   )
 
   # Add a dependency to downloading the headers onto analytics.

cmake/download_pod_headers.cmake

@@ -77,3 +77,33 @@ function(setup_pod_headers_target TARGET_NAME POD_DIR POD_LIST)
   )
 
 endfunction()
+
+# Creates a symlink to the header files of the given framework. Used when
+# include paths are expecting the header files to be in a subdirectory, when
+# accessing the header files directly does not have them in the same structure.
+#
+# Args:
+#   LIBRARY_TARGET: The library to add the include directory to.
+#   DOWNLOAD_POD_TARGET: The target that downloads the pod files which will
+#                        contain the framework. From the above function.
+#   FRAMEWORK_PATH: The full path to the framework.
+#   SYMLINK_NAME: The name of the symlink to use. Usually the framework name.
+function(symlink_framework_headers LIBRARY_TARGET DOWNLOAD_POD_TARGET
+         FRAMEWORK_PATH SYMLINK_NAME)
+  # Guarantee the directory exists
+  set(HEADER_DIR "${PROJECT_BINARY_DIR}/FrameworkHeaders")
+  file(MAKE_DIRECTORY "${HEADER_DIR}")
+
+  # Create a symlink to the headers
+  add_custom_command(TARGET ${DOWNLOAD_POD_TARGET}
+    POST_BUILD
+    COMMAND ln -sf ${FRAMEWORK_PATH}/Headers ${HEADER_DIR}/${SYMLINK_NAME}
+    COMMENT "Setting up the framework header directory for ${SYMLINK_NAME}."
+  )
+
+  # Add the symlink directory to the list of includes
+  target_include_directories(${LIBRARY_TARGET}
+    PRIVATE
+      ${HEADER_DIR}
+  )
+endfunction()

remote_config/CMakeLists.txt

@@ -140,7 +140,7 @@ if(IOS)
   target_include_directories(firebase_remote_config
     PRIVATE
       ${base_header_dir}/FirebaseCore
-      ${base_header_dir}/FirebaseRemoteConfig/FirebaseRemoteConfig
+      ${base_header_dir}/FirebaseRemoteConfig
   )
 
   # Add a dependency to downloading the headers onto remote_config.