simplify haldning for newer multipack patches so they can be added in a single place (#1270)

src/axolotl/monkeypatch/multipack.py

@@ -0,0 +1,30 @@
+"""multipack patching for v2 of sample packing"""
+
+import transformers
+from transformers.integrations import is_deepspeed_zero3_enabled
+
+from axolotl.monkeypatch.mixtral import patch_mixtral_moe_forward_zero3
+from axolotl.monkeypatch.utils import get_unpad_data
+
+SUPPORTED_MULTIPACK_MODEL_TYPES = ["mixtral", "qwen2", "falcon", "phi"]
+
+
+def patch_for_multipack(model_type):
+    if model_type == "mixtral":
+        transformers.models.mixtral.modeling_mixtral._get_unpad_data = (  # pylint: disable=protected-access
+            get_unpad_data
+        )
+        if is_deepspeed_zero3_enabled():
+            patch_mixtral_moe_forward_zero3()
+    elif model_type == "qwen2":
+        transformers.models.qwen2.modeling_qwen2._get_unpad_data = (  # pylint: disable=protected-access
+            get_unpad_data
+        )
+    elif model_type == "falcon":
+        transformers.models.falcon.modeling_falcon._get_unpad_data = (  # pylint: disable=protected-access
+            get_unpad_data
+        )
+    elif model_type == "phi":
+        transformers.models.phi.modeling_phi._get_unpad_data = (  # pylint: disable=protected-access
+            get_unpad_data
+        )