Merge https://github.com/firebase/firebase-unity-sdk into version_workflow

Author: Cynthia Jiang

CMakeLists.txt

@@ -41,7 +41,7 @@ option(FIREBASE_INCLUDE_AUTH
        ${FIREBASE_INCLUDE_LIBRARY_DEFAULT})
 option(FIREBASE_INCLUDE_CRASHLYTICS
        "Include the Firebase Crashlytics library."
-       OFF)
+       ${FIREBASE_INCLUDE_LIBRARY_DEFAULT})
 option(FIREBASE_INCLUDE_DATABASE
        "Include the Firebase Realtime Database library."
        ${FIREBASE_INCLUDE_LIBRARY_DEFAULT})

build_android.sh

@@ -80,7 +80,7 @@ mkdir -p android_build
 pushd android_build
 
 # Configure cmake with option value
-cmake .. ${CMAKE_OPTIONS}
+cmake .. ${CMAKE_OPTIONS} "$@"
 check_exit_code $?
 
 # Build the SDK

crashlytics/CMakeLists.txt

@@ -14,6 +14,8 @@
 
 # CMake file for the firebase crashlytics library
 
+include(build_shared)
+
 # Only for unity builds
 if(NOT FIREBASE_INCLUDE_UNITY)
   return()

crashlytics/src/cpp/CMakeLists.txt

@@ -67,6 +67,28 @@ target_compile_definitions(firebase_crashlytics
     -DINTERNAL_EXPERIMENTAL=1
 )
 
+# Generate the Proguard file
+if(ANDROID)
+  set(FIREBASE_CPP_CRASHLYTICS_PROGUARD ${CMAKE_CURRENT_BINARY_DIR}/crashlytics.pro
+      CACHE FILEPATH "Proguard file for Crashlytics" FORCE)
+
+  add_custom_command(
+    OUTPUT ${FIREBASE_CPP_CRASHLYTICS_PROGUARD}
+    COMMAND strings $<TARGET_FILE:firebase_crashlytics> |
+            grep %PG% |
+            sed -r 'sI/I.Ig' |
+            sed -r 's/%PG%/-keep,includedescriptorclasses public class /g'
+            > ${FIREBASE_CPP_CRASHLYTICS_PROGUARD}
+    DEPENDS firebase_crashlytics
+    COMMENT "Generating Crashlytics Proguard file."
+  )
+
+  add_custom_target(
+    FIREBASE_CPP_CRASHLYTICS_PROGUARD
+    DEPENDS ${FIREBASE_CPP_CRASHLYTICS_PROGUARD}
+  )
+endif()
+
 if(IOS)
  # Enable Automatic Reference Counting (ARC).
   set_property(