189 lines
6.6 KiB
Python
189 lines
6.6 KiB
Python
"""統一轉換入口：依副檔名/URL 分派轉換器，登記 SHA-256 至 raw/manifest.json。
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流程（AGENTS.md §6.1、§9）：
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原始檔存入 raw/originals/ 並登記 hash → 轉換 → Markdown 存入 raw/converted/
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並登記 hash 與原始檔對應 → 之後攝入管線只讀 converted 層。
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用法：python tools/convert/convert.py <檔案路徑或URL>... [--dry-run] [--root DIR]
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"""
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import argparse
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import datetime
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import hashlib
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import json
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import pathlib
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import re
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import sys
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import urllib.parse
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sys.path.insert(0, str(pathlib.Path(__file__).parent))
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import from_docx
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import from_pdf
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import from_pptx
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import from_web
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import from_xlsx
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ROOT = pathlib.Path(__file__).resolve().parents[2]
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CONVERTERS = {
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".docx": (from_docx.convert, "from_docx", "docx"),
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".xlsx": (from_xlsx.convert, "from_xlsx", "xlsx"),
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".pdf": (from_pdf.convert, "from_pdf", "pdf"),
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".pptx": (from_pptx.convert, "from_pptx", "pptx"),
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}
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def _now():
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return datetime.datetime.now().astimezone().isoformat(timespec="seconds")
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def _slug(s):
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s = re.sub(r"[^a-z0-9一-鿿]+", "-", s.lower()).strip("-")
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return s or "page"
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def load_manifest(root):
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p = root / "raw" / "manifest.json"
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m = json.loads(p.read_text(encoding="utf-8"))
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if m.get("version") != 1 or "files" not in m:
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raise SystemExit(f"manifest 結構不符：{p}")
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return m
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def save_manifest(root, m):
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p = root / "raw" / "manifest.json"
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tmp = p.with_suffix(".json.tmp")
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tmp.write_text(json.dumps(m, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
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tmp.replace(p) # 原子替換，避免寫壞 manifest
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def _find_by_sha(m, sha):
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for path, e in m["files"].items():
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if e["kind"] == "original" and e["sha256"] == sha:
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return path
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return None
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def _dest_name(dir_, name, sha):
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"""既有同名檔且內容不同時，附 hash 前 8 碼避免覆蓋（raw 不可變）。"""
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p = dir_ / name
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if p.exists() and hashlib.sha256(p.read_bytes()).hexdigest() != sha:
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stem, ext = pathlib.Path(name).stem, pathlib.Path(name).suffix
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return f"{stem}-{sha[:8]}{ext}"
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return name
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def _register_pair(m, root, orig_rel, orig_entry, md_rel, md_text, converter, dry):
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if not dry:
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md_path = root / md_rel
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md_path.write_text(md_text, encoding="utf-8")
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m["files"][orig_rel] = orig_entry
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m["files"][md_rel] = {
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"kind": "converted",
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"sha256": hashlib.sha256(md_text.encode("utf-8")).hexdigest(),
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"original_path": orig_rel,
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"original_sha256": orig_entry["sha256"],
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"converter": converter,
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"converted_at": _now(),
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}
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print(f"converted: {orig_rel} -> {md_rel}" + (" [dry-run]" if dry else ""))
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def process_local(root, m, path, dry):
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src = pathlib.Path(path).resolve()
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if not src.is_file():
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raise FileNotFoundError(src)
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ext = src.suffix.lower()
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if ext in (".html", ".htm"):
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conv, conv_name, media = (
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lambda p, assets_dir=None, md_dir=None: from_web.extract(
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pathlib.Path(p).read_text(encoding="utf-8", errors="replace")),
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"from_web", "html")
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elif ext in CONVERTERS:
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conv, conv_name, media = CONVERTERS[ext]
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else:
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raise ValueError(f"不支援的格式：{src.name}")
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sha = hashlib.sha256(src.read_bytes()).hexdigest()
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if _find_by_sha(m, sha):
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print(f"skip: {src.name} 已登記（hash 相同）")
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return
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originals = root / "raw" / "originals"
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if src.parent == originals.resolve():
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dest = src
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else:
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dest = originals / _dest_name(originals, src.name, sha)
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if not dry and not dest.exists():
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dest.write_bytes(src.read_bytes())
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orig_rel = f"raw/originals/{dest.name}"
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orig_entry = {"kind": "original", "sha256": sha, "media_type": media,
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"added_at": _now(), "status": "converted"}
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md_name = f"{dest.stem}-{sha[:8]}.md"
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assets = None if dry else root / "raw" / "converted" / "assets" / f"{dest.stem}-{sha[:8]}"
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md_text, status = conv(str(src), assets_dir=assets, md_dir=root / "raw" / "converted")
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if status == "needs_ocr":
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orig_entry["status"] = "needs_ocr"
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if not dry:
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m["files"][orig_rel] = orig_entry
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print(f"needs_ocr: {orig_rel} 無文字層，已登記並跳過（不擅自 OCR）"
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+ (" [dry-run]" if dry else ""))
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return
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_register_pair(m, root, orig_rel, orig_entry, f"raw/converted/{md_name}",
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md_text, conv_name, dry)
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def process_url(root, m, url, dry):
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html = from_web.fetch(url)
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sha = hashlib.sha256(html.encode("utf-8")).hexdigest()
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if _find_by_sha(m, sha):
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print(f"skip: {url} 已登記（快照 hash 相同）")
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return
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u = urllib.parse.urlparse(url)
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slug = _slug(f"{u.netloc}{u.path}")[:80]
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originals = root / "raw" / "originals"
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name = _dest_name(originals, f"{slug}.html", sha)
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orig_rel = f"raw/originals/{name}"
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orig_entry = {"kind": "original", "sha256": sha, "media_type": "html",
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"added_at": _now(), "status": "converted",
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"source_url": url, "fetched_at": _now()}
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if not dry:
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(originals / name).write_text(html, encoding="utf-8") # 完整快照（來源可能消失）
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md_text, status = from_web.extract(html)
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if status != "ok":
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orig_entry["status"] = "pending"
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if not dry:
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m["files"][orig_rel] = orig_entry
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print(f"pending: {url} 萃取不到正文，僅保存快照" + (" [dry-run]" if dry else ""))
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return
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md_name = f"{pathlib.Path(name).stem}-{sha[:8]}.md"
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_register_pair(m, root, orig_rel, orig_entry, f"raw/converted/{md_name}",
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md_text, "from_web", dry)
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def main(argv=None):
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ap = argparse.ArgumentParser(description=__doc__)
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ap.add_argument("inputs", nargs="+", help="檔案路徑或 http(s) URL")
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ap.add_argument("--dry-run", action="store_true")
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ap.add_argument("--root", default=str(ROOT), help="專案根目錄（測試用）")
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a = ap.parse_args(argv)
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root = pathlib.Path(a.root).resolve()
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m = load_manifest(root)
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failed = []
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for item in a.inputs:
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try:
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if item.startswith(("http://", "https://")):
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process_url(root, m, item, a.dry_run)
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else:
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process_local(root, m, item, a.dry_run)
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except Exception as e: # 單檔失敗不中斷批次，最後彙總報錯
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failed.append((item, e))
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print(f"error: {item}: {e}", file=sys.stderr)
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if not a.dry_run:
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save_manifest(root, m)
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if failed:
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raise SystemExit(1)
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if __name__ == "__main__":
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main()
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