Function prepend_sys_path_once

src/python/runner.cpp:202–237

        }

        bool prepend_sys_path_once(PyObject* const sys_path,
                                   const std::filesystem::path& path,
                                   const char* label) {
            if (!sys_path || path.empty()) {
                return false;
            }

            const auto path_utf8 = lfs::core::path_to_utf8(path);
            PyObject* const py_path = PyUnicode_FromString(path_utf8.c_str());
            if (!py_path) {
                LOG_WARN("Failed to create Python path string for {}: {}", label, path_utf8);
                PyErr_Clear();
                return false;
            }

            const int contains = PySequence_Contains(sys_path, py_path);
            if (contains < 0) {
                LOG_WARN("Failed to inspect sys.path while adding {}: {}", label, path_utf8);
                PyErr_Clear();
                Py_DECREF(py_path);
                return false;
            }

            if (contains == 0) {
                if (PyList_Insert(sys_path, 0, py_path) != 0) {
                    LOG_WARN("Failed to prepend {} to sys.path: {}", label, path_utf8);
                    PyErr_Clear();
                    Py_DECREF(py_path);
                    return false;
                }
                LOG_INFO("Added {} to Python path: {}", label, path_utf8);
            }

            Py_DECREF(py_path);
            return true;
        }

#ifdef LFS_DEV_PYTHON_SOURCE_DIR
        void prepend_dev_python_source_path(PyObject* const sys_path) {