mirror of
https://github.com/basicmachines-co/basic-memory
synced 2026-06-21 13:47:35 +00:00
phernandez
137 lines
3.6 KiB
Python
137 lines
3.6 KiB
Python
"""Utilities for file operations."""
|
|
import hashlib
|
|
from pathlib import Path
|
|
from typing import Dict, Any, Tuple
|
|
|
|
import yaml
|
|
from loguru import logger
|
|
|
|
|
|
class FileError(Exception):
|
|
"""Base exception for file operations."""
|
|
pass
|
|
|
|
|
|
class FileWriteError(FileError):
|
|
"""Raised when file operations fail."""
|
|
pass
|
|
|
|
|
|
class ParseError(FileError):
|
|
"""Raised when parsing file content fails."""
|
|
pass
|
|
|
|
|
|
async def compute_checksum(content: str) -> str:
|
|
"""
|
|
Compute SHA-256 checksum of content.
|
|
|
|
Args:
|
|
content: Text content to hash
|
|
|
|
Returns:
|
|
SHA-256 hex digest
|
|
|
|
Raises:
|
|
FileError: If checksum computation fails
|
|
"""
|
|
try:
|
|
return hashlib.sha256(content.encode()).hexdigest()
|
|
except Exception as e:
|
|
logger.error(f"Failed to compute checksum: {e}")
|
|
raise FileError(f"Failed to compute checksum: {e}")
|
|
|
|
|
|
async def ensure_directory(path: Path) -> None:
|
|
"""
|
|
Ensure directory exists, creating if necessary.
|
|
|
|
Args:
|
|
path: Directory path to ensure
|
|
|
|
Raises:
|
|
FileWriteError: If directory creation fails
|
|
"""
|
|
try:
|
|
path.mkdir(parents=True, exist_ok=True)
|
|
except Exception as e:
|
|
logger.error(f"Failed to create directory: {path}: {e}")
|
|
raise FileWriteError(f"Failed to create directory {path}: {e}")
|
|
|
|
|
|
async def write_file_atomic(path: Path, content: str) -> None:
|
|
"""
|
|
Write file with atomic operation using temporary file.
|
|
|
|
Args:
|
|
path: Target file path
|
|
content: Content to write
|
|
|
|
Raises:
|
|
FileWriteError: If write operation fails
|
|
"""
|
|
temp_path = path.with_suffix(".tmp")
|
|
try:
|
|
temp_path.write_text(content)
|
|
temp_path.replace(path)
|
|
except Exception as e:
|
|
temp_path.unlink(missing_ok=True)
|
|
logger.error(f"Failed to write file: {path}: {e}")
|
|
raise FileWriteError(f"Failed to write file {path}: {e}")
|
|
|
|
|
|
async def add_frontmatter(content: str, metadata: Dict[str, Any]) -> str:
|
|
"""
|
|
Add YAML frontmatter to content.
|
|
|
|
Args:
|
|
content: Main content text
|
|
metadata: Key-value pairs for frontmatter
|
|
|
|
Returns:
|
|
Content with YAML frontmatter prepended
|
|
|
|
Raises:
|
|
ParseError: If YAML serialization fails
|
|
"""
|
|
try:
|
|
yaml_fm = yaml.dump(metadata, sort_keys=False)
|
|
return f"---\n{yaml_fm}---\n\n{content}"
|
|
except yaml.YAMLError as e:
|
|
logger.error(f"Failed to add frontmatter: {e}")
|
|
raise ParseError(f"Failed to add frontmatter: {e}")
|
|
|
|
|
|
async def parse_frontmatter(content: str) -> Tuple[Dict[str, Any], str]:
|
|
"""
|
|
Parse YAML frontmatter from content.
|
|
|
|
Args:
|
|
content: Text content with optional frontmatter
|
|
|
|
Returns:
|
|
Tuple of (frontmatter dict, remaining content)
|
|
|
|
Raises:
|
|
ParseError: If frontmatter parsing fails
|
|
"""
|
|
try:
|
|
if not content.startswith("---\n"):
|
|
return {}, content
|
|
|
|
try:
|
|
_, fm, content = content.split("---\n", 2)
|
|
except ValueError as e:
|
|
raise ParseError("Invalid frontmatter format") from e
|
|
|
|
try:
|
|
metadata = yaml.safe_load(fm)
|
|
return metadata or {}, content.strip()
|
|
except yaml.YAMLError as e:
|
|
raise ParseError(f"Invalid YAML in frontmatter: {e}") from e
|
|
|
|
except Exception as e:
|
|
if not isinstance(e, ParseError):
|
|
logger.error(f"Failed to parse frontmatter: {e}")
|
|
raise ParseError(f"Failed to parse frontmatter: {e}") from e
|
|
raise |