[BUILD] Fixing CMake to build GTest on Windows

CMakeLists.txt

@@ -213,9 +213,14 @@ function(install_windows_deps)
   set(ENV{ARCH} ${ARCH})
   execute_process(
     COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/tools/setup-buildtools.cmd)
-  set(CMAKE_TOOLCHAIN_FILE
+  # set(CMAKE_TOOLCHAIN_FILE
+  #     ${CMAKE_CURRENT_SOURCE_DIR}/tools/vcpkg/scripts/buildsystems/vcpkg.cmake
+  #     PARENT_SCOPE)
+  include(
       ${CMAKE_CURRENT_SOURCE_DIR}/tools/vcpkg/scripts/buildsystems/vcpkg.cmake
-      PARENT_SCOPE)
+      PARENT_SCOPE
+  )
+
 endfunction()
 
 if(WITH_JAEGER)
@@ -467,7 +472,7 @@ if(BUILD_TESTING)
         ${CMAKE_BINARY_DIR}/lib/libgmock.a)
   elseif(WIN32)
     # Make sure we are always bootsrapped with vcpkg on Windows
-    find_package(GTest REQUIRED)
+    find_package(GTest)
     if(NOT (GTEST_FOUND OR GTest_FOUND))
       install_windows_deps()
       find_package(GTest REQUIRED)

test_common/src/http/client/nosend/CMakeLists.txt

@@ -25,7 +25,7 @@ if(${BUILD_TESTING})
   endif()
 
   target_link_libraries(
-    opentelemetry_http_client_nosend ${GTEST_BOTH_LIBRARIES} ${GMOCK_LIB}
+    opentelemetry_http_client_nosend ${GTEST_BOTH_LIBRARIES} 
     opentelemetry_ext opentelemetry_test_common)
 
 endif()

tools/setup-buildtools.cmd

@@ -58,6 +58,7 @@ if %ERRORLEVEL% == 1 (
   popd
 ) else (
   echo Using existing vcpkg installation...
+  set "VCPKG_ROOT=%~dp0\vcpkg"
 )
 
 REM Install dependencies