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c4e128a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | """File system utilities for the KDC project."""
from __future__ import annotations
import hashlib
from pathlib import Path
def ensure_dir(path: Path) -> Path:
"""Create *path* (and parents) if it does not exist. Returns *path*."""
path.mkdir(parents=True, exist_ok=True)
return path
def file_sha256(path: Path, chunk_size: int = 65_536) -> str:
"""Return the SHA-256 hex digest of a file without loading it fully into RAM."""
h = hashlib.sha256()
with path.open("rb") as f:
for chunk in iter(lambda: f.read(chunk_size), b""):
h.update(chunk)
return h.hexdigest()
def human_size(size_bytes: int) -> str:
"""Format a byte count as a human-readable string (e.g. '2.3 MB')."""
for unit in ("B", "KB", "MB", "GB", "TB"):
if abs(size_bytes) < 1024.0:
return f"{size_bytes:.1f} {unit}"
size_bytes = int(size_bytes / 1024.0)
return f"{size_bytes:.1f} PB"
def iter_pdfs(root: Path, recursive: bool = True) -> list[Path]:
"""Return all .pdf files under *root*, optionally recursive."""
pattern = "**/*.pdf" if recursive else "*.pdf"
return sorted(root.glob(pattern))
def safe_stem(path: Path) -> str:
"""Return the filename stem, safe for use as a directory name."""
return path.stem.replace(" ", "_").lower()
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