feat: add cut_cross_entropy (#2091)

* feat: add cut_cross_entropy

* fix: add to input

* fix: remove from setup.py

* feat: refactor into an integration

* chore: ignore lint

* feat: add test for cce

* fix: set max_steps for liger test

* chore: Update base model following suggestion

Co-authored-by: Wing Lian <wing.lian@gmail.com>

* chore: update special_tokens following suggestion

Co-authored-by: Wing Lian <wing.lian@gmail.com>

* chore: remove with_temp_dir following comments

* fix: plugins aren't loaded

* chore: update quotes in error message

* chore: lint

* chore: lint

* feat: enable FA on test

* chore: refactor get_pytorch_version

* fix: lock cce commit version

* fix: remove subclassing UT

* fix: downcast even if not using FA and config check

* feat: add test to check different attentions

* feat: add install to CI

* chore: refactor to use parametrize for attention

* fix: pytest not detecting test

* feat: handle torch lower than 2.4

* fix args/kwargs to match docs

* use release version cut-cross-entropy==24.11.4

* fix quotes

* fix: use named params for clarity for modal builder

* fix: handle install from pip

* fix: test check only top level module install

* fix: re-add import check

* uninstall existing version if no transformers submodule in cce

* more dataset fixtures into the cache

---------

Co-authored-by: Wing Lian <wing.lian@gmail.com>
Co-authored-by: Wing Lian <wing@axolotl.ai>

scripts/cutcrossentropy_install.py

@@ -0,0 +1,28 @@
+"""Script to output the correct installation command for cut-cross-entropy."""
+import importlib.util
+import sys
+
+try:
+    import torch
+except ImportError as exc:
+    raise ImportError("Install torch via `pip install torch`") from exc
+from packaging.version import Version as V
+
+v = V(torch.__version__)
+
+# no cut-cross-entropy support for torch < 2.4.0
+if v < V("2.4.0"):
+    print("")
+    sys.exit(0)
+
+cce_spec = importlib.util.find_spec("cut_cross_entropy")
+cce_spec_transformers = importlib.util.find_spec("cut_cross_entropy.transformers")
+
+UNINSTALL_PREFIX = ""
+if cce_spec and not cce_spec_transformers:
+    UNINSTALL_PREFIX = "pip uninstall -y cut-cross-entropy && "
+
+print(
+    UNINSTALL_PREFIX
+    + 'pip install "cut-cross-entropy @ git+https://github.com/apple/ml-cross-entropy.git@9c297c905f55b73594b5d650722d1e78183b77bd"'
+)