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78 lines
2.7 KiB
Python
78 lines
2.7 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the terms described in the LICENSE file in
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# the root directory of this source tree.
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from collections import namedtuple
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from typing import List, Optional
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from llama_models.sku_list import all_registered_models
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from llama_stack.providers.datatypes import Model, ModelsProtocolPrivate
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ModelAlias = namedtuple("ModelAlias", ["provider_model_id", "aliases", "llama_model"])
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def get_huggingface_repo(model_descriptor: str) -> Optional[str]:
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"""Get the Hugging Face repository for a given CoreModelId."""
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for model in all_registered_models():
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if model.descriptor() == model_descriptor:
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return model.huggingface_repo
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return None
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def build_model_alias(provider_model_id: str, model_descriptor: str) -> ModelAlias:
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return ModelAlias(
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provider_model_id=provider_model_id,
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aliases=[
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model_descriptor,
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get_huggingface_repo(model_descriptor),
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],
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llama_model=model_descriptor,
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)
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class ModelLookup:
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def __init__(
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self,
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model_aliases: List[ModelAlias],
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):
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self.alias_to_provider_id_map = {}
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self.provider_id_to_llama_model_map = {}
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for alias_obj in model_aliases:
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for alias in alias_obj.aliases:
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self.alias_to_provider_id_map[alias] = alias_obj.provider_model_id
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# also add a mapping from provider model id to itself for easy lookup
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self.alias_to_provider_id_map[alias_obj.provider_model_id] = (
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alias_obj.provider_model_id
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)
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self.provider_id_to_llama_model_map[alias_obj.provider_model_id] = (
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alias_obj.llama_model
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)
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def get_provider_model_id(self, identifier: str) -> str:
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if identifier in self.alias_to_provider_id_map:
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return self.alias_to_provider_id_map[identifier]
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else:
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raise ValueError(f"Unknown model: `{identifier}`")
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class ModelRegistryHelper(ModelsProtocolPrivate):
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def __init__(self, model_aliases: List[ModelAlias]):
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self.model_lookup = ModelLookup(model_aliases)
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def get_llama_model(self, provider_model_id: str) -> str:
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return self.model_lookup.provider_id_to_llama_model_map[provider_model_id]
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async def register_model(self, model: Model) -> Model:
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provider_model_id = self.model_lookup.get_provider_model_id(
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model.provider_resource_id
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)
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if not provider_model_id:
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raise ValueError(f"Unknown model: `{model.provider_resource_id}`")
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model.provider_resource_id = provider_model_id
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return model
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