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"""Convert a PEFT adapter checkpoint to `adapter.gguf`. |
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|
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llama.cpp's `convert_lora_to_gguf.py` takes the adapter directory as |
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a **positional** argument and reads `adapter_config.json` to discover |
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the base model. Earlier drafts (pre-audit F09) invented a `--base` |
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flag; the upstream CLI does not have one. This module assembles the |
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exact upstream signature so a snapshot test against `--help` catches |
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drift. |
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""" |
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|
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from __future__ import annotations |
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|
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import sys |
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from pathlib import Path |
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|
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from dlm.export import vendoring |
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|
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|
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def build_convert_lora_args( |
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adapter_dir: Path, |
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*, |
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out_gguf: Path, |
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outtype: str = "f16", |
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script_override: Path | None = None, |
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python_exe: str | None = None, |
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) -> list[str]: |
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"""Assemble the `python convert_lora_to_gguf.py <adapter> ...` argv. |
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|
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Audit F09: the signature must match the pinned upstream CLI. A |
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snapshot test under `tests/unit/export/test_subprocess_args.py` |
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diffs this against the expected form and fails on drift. |
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""" |
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script = vendoring.convert_lora_to_gguf_py(script_override) |
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return [ |
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python_exe or sys.executable, |
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str(script), |
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str(adapter_dir), |
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"--outfile", |
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str(out_gguf), |
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"--outtype", |
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outtype, |
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] |