fix ydb: implementation of using installed instance of ydb-cpp-sdk

cmake/install/Config.cmake.in

@@ -24,6 +24,19 @@ if(NOT userver_FIND_COMPONENTS)
     return()
 endif()
 
+include(CMakeFindDependencyMacro)
+
+set(USERVER_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR})
+
+if("ydb" IN_LIST userver_FIND_COMPONENTS)
+    set(USERVER_YDB_CONFIG_PHASE deps)
+    include("${USERVER_CMAKE_DIR}/userver-ydb-config.cmake")
+    unset(USERVER_YDB_CONFIG_PHASE)
+    if(NOT _USERVER_YDB_DEPS_LOADED)
+        return()
+    endif()
+endif()
+
 if(CMAKE_BUILD_TYPE MATCHES "^.*Rel.*$") # same as in UserverSetupEnvironment
     include("${CMAKE_CURRENT_LIST_DIR}/release/userver-targets.cmake")
 else()
@@ -32,10 +45,7 @@ endif()
 
 message(STATUS "Userver components: ${userver_FIND_COMPONENTS}")
 
-include(CMakeFindDependencyMacro)
-
 set(USERVER_DOWNLOAD_PACKAGES OFF)
-set(USERVER_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR})
 set(USERVER_TESTSUITE_DIR "${USERVER_CMAKE_DIR}/testsuite")
 set(USERVER_CONAN @USERVER_CONAN@)
 set(USERVER_IMPL_ORIGINAL_CXX_STANDARD @CMAKE_CXX_STANDARD@)

cmake/install/userver-ydb-config.cmake

@@ -1,14 +1,21 @@
-# TODO: not working yet
-include_guard(GLOBAL)
+if(USERVER_YDB_CONFIG_PHASE STREQUAL "deps")
+    if(_USERVER_YDB_DEPS_LOADED)
+        return()
+    endif()
+
+    find_dependency(googleapis CONFIG)
+    find_dependency(ydb-cpp-sdk CONFIG)
+
+    set(_USERVER_YDB_DEPS_LOADED TRUE)
+    return()
+endif()
 
 if(userver_ydb_FOUND)
     return()
 endif()
 
 find_package(userver REQUIRED COMPONENTS core)
 
-# include("${USERVER_CMAKE_DIR}/ydb-cpp-sdk.cmake")
-
 include("${USERVER_CMAKE_DIR}/UserverSql.cmake")
 
 set(userver_ydb_FOUND TRUE)

ydb/CMakeLists.txt

@@ -31,7 +31,7 @@ userver_module(
 
 _userver_directory_install(
     COMPONENT ydb
-    FILES "${USERVER_ROOT_DIR}/cmake/SetupYdbCPPSDK.cmake"
+    FILES "${USERVER_ROOT_DIR}/cmake/SetupYdbCppSDK.cmake"
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/userver"
 )