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from pathlib import Path
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from shutil import copytree
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from huggingface_hub import hf_hub_download
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def ensure_eagle_cache_ready(vendor_dir: Path, cache_dir: Path, assets_repo: str) -> None:
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"""Populate the Eagle processor directory in cache and ensure tokenizer assets exist.
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- Copies the vendored Eagle files into cache_dir (overwriting when needed).
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- Downloads vocab.json and merges.txt into the same cache_dir if missing.
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"""
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cache_dir = Path(cache_dir)
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vendor_dir = Path(vendor_dir)
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try:
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print(f"[GROOT] Copying vendor Eagle files to cache: {vendor_dir} -> {cache_dir}")
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copytree(vendor_dir, cache_dir, dirs_exist_ok=True)
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except Exception as exc:
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print(f"[GROOT] Warning: Failed to copy vendor Eagle files to cache: {exc}")
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required_assets = [
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"vocab.json",
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"merges.txt",
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"added_tokens.json",
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"chat_template.json",
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"special_tokens_map.json",
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"config.json",
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"generation_config.json",
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"preprocessor_config.json",
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"processor_config.json",
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"tokenizer_config.json",
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]
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print(f"[GROOT] Assets repo: {assets_repo} \n Cache dir: {cache_dir}")
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for fname in required_assets:
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dst = cache_dir / fname
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if not dst.exists():
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print(f"[GROOT] Fetching {fname}")
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hf_hub_download(
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repo_id=assets_repo,
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filename=fname,
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repo_type="model",
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local_dir=str(cache_dir),
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)
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