Refactor vLLM generation [1/N]: Extract vLLM generation

trl/generation/__init__.py

@@ -0,0 +1,25 @@
+# Copyright 2020-2026 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Generation backends for TRL trainers."""
+
+from ..import_utils import is_vllm_available
+
+
+__all__ = []
+
+if is_vllm_available():
+    from .vllm_generation import VLLMGeneration
+
+    __all__.append("VLLMGeneration")