Fixed pyi file build when OpenVINO_DIR is externally defined

src/python/CMakeLists.txt

@@ -114,6 +114,15 @@ elseif(DEFINED PY_BUILD_CMAKE_PACKAGE_NAME AND NOT WIN32)
     # in case of wheel build, pybind11-stubgen is always available via pyproject.toml's build-system
     # except Win32 where we have issues with pybind11_stubgen executable which cannot import its own module
     set(pybind11_stubgen_AVAILABLE ON)
+
+    # by default, wheel build is performed with build-isolation, which means that some variables like PYTHONPATH
+    # are not available. But if user called setupvars.sh, then OpenVINO dir is available, while PYTHONPATH - no.
+    # In this case, we will have mismatch on Linux when OpenVINO can point on build dir / install dir, while
+    # PYTHONPATH points out to locally installed tmp OpenVINO wheel (build against wheel).
+    # We need to detect such case and disable it
+    if(LINUX AND NOT OpenVINO_DIR STREQUAL OpenVINO_DIR_PY)
+        set(pybind11_stubgen_AVAILABLE OFF)
+    endif()
 endif()
 
 # but we also need to check whether OpenVINO is installed
@@ -167,7 +176,7 @@ if(pybind11_stubgen_AVAILABLE)
     add_custom_command(OUTPUT ${output_file}
         COMMAND "${CMAKE_COMMAND}" -E rm -f "${CMAKE_BINARY_DIR}/openvino_genai/__init__.pyi"
                                             "${CMAKE_BINARY_DIR}/openvino_genai/py_openvino_genai.pyi"
-        COMMAND "${CMAKE_COMMAND}" -E env PYTHONPATH=${CMAKE_BINARY_DIR}:${openvino_pythonpath}:$ENV{PYTHONPATH}
+        COMMAND "${CMAKE_COMMAND}" -E env PYTHONPATH=${CMAKE_BINARY_DIR}:$ENV{PYTHONPATH}
                 ${pybind11_stubgen} --output-dir ${stub_files_location} openvino_genai
         ${validation_command}
         ${copy_to_source_command}

src/python/py_vlm_pipeline.cpp

@@ -28,7 +28,7 @@ auto vlm_generate_docstring = R"(
     :type images: List[ov.Tensor] or ov.Tensor
 
     :param generation_config: generation_config
-    :type generation_config: GenerationConfig or a Dict
+    :type generation_config: GenerationConfig or a  Dict
 
     :param streamer: streamer either as a lambda with a boolean returning flag whether generation should be stopped
     :type : Callable[[str], bool], ov.genai.StreamerBase