add warning that sharegpt will be deprecated (#1957)

* add warning that sharegpt will be deprecated

* add helper script for chat_templates and document deprecation

* Update src/axolotl/prompt_strategies/sharegpt.py

Co-authored-by: NanoCode012 <nano@axolotl.ai>

---------

Co-authored-by: NanoCode012 <nano@axolotl.ai>

README.md

@@ -383,7 +383,7 @@ See [examples](examples) for quick start. It is recommended to duplicate and mod
         - typescript
       type: ... # unimplemented custom format
 
-      # fastchat conversation
+      # fastchat conversation (deprecation soon, use chat_template)
       # See 'conversation' options: https://github.com/lm-sys/FastChat/blob/main/fastchat/conversation.py
     - path: ...
       type: sharegpt

scripts/chat_datasets.py

@@ -0,0 +1,60 @@
+"""
+helper script to parse chat datasets into a usable yaml
+"""
+import click
+import yaml
+from datasets import load_dataset
+
+
+@click.command()
+@click.argument("dataset", type=str)
+@click.option("--split", type=str, default="train")
+def parse_dataset(dataset=None, split="train"):
+    ds_cfg = {}
+    ds_cfg["path"] = dataset
+    ds_cfg["split"] = split
+    ds_cfg["type"] = "chat_template"
+    ds_cfg["chat_template"] = "<<<Replace based on your model>>>"
+
+    dataset = load_dataset(dataset, split=split)
+    features = dataset.features
+    feature_keys = features.keys()
+    field_messages = None
+    for key in ["conversation", "conversations", "messages"]:
+        if key in feature_keys:
+            field_messages = key
+            break
+    if not field_messages:
+        raise ValueError(
+            f'No conversation field found in dataset: {", ".join(feature_keys)}'
+        )
+    ds_cfg["field_messages"] = field_messages
+
+    message_fields = features["conversations"][0].keys()
+    message_field_role = None
+    for key in ["from", "role"]:
+        if key in message_fields:
+            message_field_role = key
+            break
+    if not message_field_role:
+        raise ValueError(
+            f'No role field found in messages: {", ".join(message_fields)}'
+        )
+    ds_cfg["message_field_role"] = message_field_role
+
+    message_field_content = None
+    for key in ["content", "text", "value"]:
+        if key in message_fields:
+            message_field_content = key
+            break
+    if not message_field_content:
+        raise ValueError(
+            f'No content field found in messages: {", ".join(message_fields)}'
+        )
+    ds_cfg["message_field_content"] = message_field_content
+
+    print(yaml.dump({"datasets": [ds_cfg]}))
+
+
+if __name__ == "__main__":
+    parse_dataset()

src/axolotl/prompt_strategies/sharegpt.py

@@ -61,6 +61,9 @@ def build_loader(
     default_conversation: Optional[str] = None,
 ):
     def _load(tokenizer, cfg, ds_cfg: Optional[Dict[str, Any]] = None):
+        LOG.warning(
+            "sharegpt type support will be deprecated in the next release of Axolotl. Please use chat_template instead.",
+        )
         conversation = (
             ds_cfg["conversation"]
             if ds_cfg and "conversation" in ds_cfg