feat mongo: add CMake support for mongo-c-driver 2.x.x

Tests: протестировано CI

---

Pull Request resolved: #1175
commit_hash:88404055d44e6643ddc912434617f36d8f288854

Author: botanegg

cmake/SetupMongoDeps.cmake

@@ -3,6 +3,21 @@ include_guard(GLOBAL)
 option(USERVER_MONGODB_USE_CMAKE_CONFIG "Use mongoc cmake configuration" ON)
 
 if(USERVER_MONGODB_USE_CMAKE_CONFIG)
+    # Try to find via modern mongo-c-driver 2.x.x way first
+    find_package(mongoc 2.0.0 QUIET CONFIG)
+    if(mongoc_FOUND)
+        message(STATUS "Mongoc: using config version: (bson: ${bson_VERSION}, mongoc: ${mongoc_VERSION})")
+
+        # prefer static libs here for compat
+        # https://github.com/mongodb/mongo-c-driver/blob/2.0.0/src/libmongoc/etc/mongocConfig.cmake.in#L7-L12
+        # mongoc::mongoc is mongoc::static first then mongoc::shared. Same for bson.
+        set(USERVER_MONGO_LIBMONGOC_NAME mongoc::mongoc)
+        set(USERVER_MONGO_LIBBSON_NAME bson::bson)
+
+        return()
+    endif()
+
+    # Go back to 1.x.x
     find_package(mongoc-1.0 QUIET CONFIG)
     if(mongoc-1.0_FOUND)
         message(STATUS "Mongoc: using config version: (bson: ${bson-1.0_VERSION}, mongoc: ${mongoc-1.0_VERSION})")

mongo/CMakeLists.txt

@@ -1,5 +1,8 @@
 project(userver-mongo CXX)
 
+set(USERVER_MONGO_LIBMONGOC_NAME mongo::mongoc_static)
+set(USERVER_MONGO_LIBBSON_NAME mongo::bson_static)
+
 if(USERVER_CONAN)
     find_package(mongoc-1.0 REQUIRED)
 else()
@@ -9,8 +12,8 @@ endif()
 userver_module(
     mongo
     SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}"
-    LINK_LIBRARIES mongo::bson_static
-    LINK_LIBRARIES_PRIVATE mongo::mongoc_static
+    LINK_LIBRARIES "${USERVER_MONGO_LIBBSON_NAME}"
+    LINK_LIBRARIES_PRIVATE "${USERVER_MONGO_LIBMONGOC_NAME}"
     UTEST_SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/src/*_test.cpp"
     DBTEST_SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/src/*_mongotest.cpp"
     DBTEST_DATABASES mongo