Diff converter v2 (#30868)

* current working example!

* commit regex and result file

* update

* nit

* push the conversion file

* oups

* roadmap and nits

* attempt diffs for 3 files

* persimmon

* nit

* add diff file that is the same as the modeling_llama.py

* fix rope nits

* updates

* updates with converted versions

* give some breathing space to the code

* delete

* update

* update

* push the actual result

* update regex patterns

* update regex patterns

* fix some issues

* fix some issues

* fix some issues

* updates

* updates

* updates

* updates

* updates

* revert changes done to llama

* updates

* update gemma

* updates

* oups

* current state

* current state

* update

* ouiiii

* nit

* clear diffs

* nit

* fixup

* update

* doc 🚀

* 🔥

* for now use gemma

* deal with comments

* style

* handle funtions

* deal with assigns

* todos

* process inheritage

* keep decorators?

* 🤗

* deal with duplicates

* fixup

* correctly remove duplicate code

* run ruff post script

* ruff deals pretty well with imports, let's leave it to him

* ah maybe not lol

* for now remove all imports from child.

* nit

* conversion of llama

* okay

* convert starcoder2

* synch with main

* update llama diff

* updates

* https://docs.astral.sh/ruff/rules/redefined-while-unused/ fixes the imports, bit needs later version of ruff

* updates

* okay actual state

* non zero exit

* update!

* revert unrelated

* remove other diff files

* updates

* cleanup

* update

* less diff!

* stash

* current updates

* updates

* No need for call

* finished fining deps

* update

* current changes

* current state

* current state

* new status

* nit

* finally

* fixes

* nits

* order is now expected

* use logger info instead of prints

* fixup

* up

* nit

* update

* nits

* update

* correct merge

* update

* update

* update

* add warning

* update caution message

* update

* better merging strategy

* copy class statements :wink

* fixups

* nits

* update

* Apply suggestions from code review

Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* nits

* smaller header

* do cleanup some stuff

* even simpler header?

* fixup

* updates

* ruff

* update examples

* nit

* TODO

* state

* OUUUUUUF

* current state

* nits

* final state

* add a readme

* fixup

* remove diff llama

* fix

* nit

* dummy noy funny

* ruff format tests src utils --check

* everless diffs

* less diffs and fix test

* fixes

* naming nit?

* update converter and add supper example

* nits

* updated for function signatures

* update

* update

* add converted dummies

* autoformat

* single target assign fix

* fixup

* fix some imports

* fixes

* don't push them

* `# noqa: F841`

---------

Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

examples/diff-conversion/diff_new_model.py

@@ -0,0 +1,30 @@
+# Example where we only want to overwrite the defaults of an init
+
+from transformers.models.gemma.configuration_gemma import GemmaConfig
+
+
+class NewModelConfig(GemmaConfig):
+    def __init__(
+        self,
+        vocab_size=256030,
+        hidden_size=64,
+        intermediate_size=90,
+        num_hidden_layers=28,
+        num_attention_heads=16,
+        num_key_value_heads=16,
+        head_dim=256,
+        hidden_act="gelu_pytorch_tanh",
+        hidden_activation=None,
+        max_position_embeddings=1500,
+        initializer_range=0.02,
+        rms_norm_eps=1e-6,
+        use_cache=True,
+        pad_token_id=0,
+        eos_token_id=1,
+        bos_token_id=2,
+        tie_word_embeddings=True,
+        rope_theta=10000.0,
+        attention_bias=False,
+        attention_dropout=0.0,
+    ):
+        super().__init__(self)