refactor: Simplify huggingface hub api implementation

gguf-py/gguf/huggingface_hub.py

@@ -7,7 +7,15 @@ from hashlib import sha256
 import requests
 from transformers import AutoTokenizer
 
-from .constants import HF_MODEL_MAP, LLaMaModelType, LLaMaVocabType
+from .constants import (
+    GPT_PRE_TOKENIZER_DEFAULT,
+    HF_TOKENIZER_BPE_FILES,
+    HF_TOKENIZER_SPM_FILES,
+    MODEL_FILE_TYPE_NAMES,
+    VOCAB_TYPE_NAMES,
+    ModelFileType,
+    VocabType,
+)
 
 
 class HFHubRequest:
@@ -81,16 +89,11 @@ class HFHubBase:
         self.logger = logger
 
         self._hub = HFHubRequest(auth_token, logger)
-        self._models = list(HF_MODEL_MAP)
 
     @property
     def hub(self) -> HFHubRequest:
         return self._hub
 
-    @property
-    def models(self) -> list[dict[str, object]]:
-        return self._models
-
     @property
     def model_path(self) -> pathlib.Path:
         return self._model_path
@@ -103,45 +106,52 @@ class HFHubBase:
 class HFVocabRequest(HFHubBase):
     def __init__(
         self,
-        model_path: None | str | pathlib.Path,
         auth_token: str,
+        model_path: None | str | pathlib.Path,
         logger: None | logging.Logger
     ):
         super().__init__(model_path, auth_token, logger)
 
     @property
-    def tokenizer_type(self) -> LLaMaVocabType:
-        return LLaMaVocabType
+    def tokenizer_type(self) -> VocabType:
+        return VocabType
 
-    def resolve_filenames(self, tokt: LLaMaVocabType) -> tuple[str]:
-        filenames = ["config.json", "tokenizer_config.json", "tokenizer.json"]
-        if tokt == self.tokenizer_type.SPM:
-            filenames.append("tokenizer.model")
-        return tuple(filenames)
+    def get_vocab_name(self, vocab_type: VocabType) -> str:
+        return VOCAB_TYPE_NAMES.get(vocab_type)
 
-    def resolve_tokenizer_model(
-        self,
-        filename: str,
-        filepath: pathlib.Path,
-        model: dict[str, object]
-    ) -> None:
-        try:  # NOTE: Do not use bare exceptions! They mask issues!
-            resolve_url = self.hub.resolve_url(model['repo'], filename)
-            response = self.hub.download_file(resolve_url)
-            self.hub.write_file(response.content, filepath)
-        except requests.exceptions.HTTPError as e:
-            self.logger.error(f"Failed to download tokenizer {model['repo']}: {e}")
+    def get_vocab_enum(self, vocab_name: str) -> VocabType:
+        return {
+            "SPM": VocabType.SPM,
+            "BPE": VocabType.BPE,
+            "WPM": VocabType.WPM,
+        }.get(vocab_name, VocabType.NON)
 
-    def download_models(self) -> None:
-        for model in self.models:
-            os.makedirs(f"{self.model_path}/{model['repo']}", exist_ok=True)
-            filenames = self.resolve_filenames(model['tokt'])
-            for filename in filenames:
-                filepath = pathlib.Path(f"{self.model_path}/{model['repo']}/{filename}")
-                if filepath.is_file():
-                    self.logger.info(f"skipped pre-existing tokenizer {model['repo']} in {filepath}")
-                    continue
-                self.resolve_tokenizer_model(filename, filepath, model)
+    def get_vocab_filenames(self, vocab_type: VocabType) -> tuple[str]:
+        if vocab_type == self.tokenizer_type.SPM:
+            return HF_TOKENIZER_SPM_FILES
+        # NOTE: WPM and BPE are equivalent
+        return HF_TOKENIZER_BPE_FILES
+
+    def get_vocab_file(
+        self, model_repo: str, file_name: str, file_path: pathlib.Path,
+    ) -> bool:
+        # NOTE: Do not use bare exceptions! They mask issues!
+        # Allow the exception to occur or handle it explicitly.
+        resolve_url = self.hub.resolve_url(model_repo, file_name)
+        response = self.hub.download_file(resolve_url)
+        self.hub.write_file(response.content, file_path)
+        self.logger.info(f"Downloaded tokenizer {file_name} from {model_repo}")
+
+    def get_all_vocab_files(self, model_repo: str, vocab_type: VocabType) -> None:
+        vocab_list = self.get_vocab_filenames(vocab_type)
+        for vocab_file in vocab_list:
+            self.get_vocab_file(model_repo, vocab_file, self.model_path)
+
+    def extract_normalizer(self) -> dict[str, object]:
+        pass
+
+    def extract_pre_tokenizers(self) -> dict[str, object]:
+        pass
 
     def generate_checksums(self) -> None:
         checksums = []
@@ -191,5 +201,5 @@ class HFModelRequest(HFHubBase):
         super().__init__(model_path, auth_token, logger)
 
     @property
-    def model_type(self) -> LLaMaModelType:
-        return LLaMaModelType
+    def model_type(self) -> ModelFileType:
+        return ModelFileType