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updater.py
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updater.py
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import os
import shutil
import pefile
from dlss_updater.config import LATEST_DLL_VERSIONS, LATEST_DLL_PATHS
from pathlib import Path
import stat
import time
import psutil
import asyncio
from packaging import version
from .logger import setup_logger
from .constants import DLL_TYPE_MAP
logger = setup_logger()
def parse_version(version_string):
# Replace commas with dots and remove any trailing zeros
cleaned_version = ".".join(version_string.replace(",", ".").split(".")[:3])
return version.parse(cleaned_version)
def get_dll_version(dll_path):
try:
with open(dll_path, "rb") as file:
pe = pefile.PE(data=file.read())
for fileinfo in pe.FileInfo:
for entry in fileinfo:
if hasattr(entry, "StringTable"):
for st in entry.StringTable:
for key, value in st.entries.items():
if key == b"FileVersion":
return value.decode("utf-8").strip()
except Exception as e:
logger.error(f"Error reading version from {dll_path}: {e}")
return None
def remove_read_only(file_path):
if not os.access(file_path, os.W_OK):
logger.info(f"Removing read-only attribute from {file_path}")
os.chmod(file_path, stat.S_IWRITE)
def restore_permissions(file_path, original_permissions):
os.chmod(file_path, original_permissions)
def is_file_in_use(file_path, timeout=5):
start_time = time.time()
while time.time() - start_time < timeout:
try:
with open(file_path, "rb"):
return False # File is not in use
except PermissionError:
for proc in psutil.process_iter(["pid", "name", "open_files"]):
try:
for file in proc.open_files():
if file.path == file_path:
logger.error(
f"File {file_path} is in use by process {proc.name()} (PID: {proc.pid})"
)
return True
except (psutil.NoSuchProcess, psutil.AccessDenied):
pass
time.sleep(0.1) # Short sleep to prevent CPU overuse
logger.info(f"Timeout reached while checking if file {file_path} is in use")
return True # Assume file is NOT in use if we can't determine otherwise to prevent hanging conditions
def normalize_path(path):
return os.path.normpath(path)
async def create_backup(dll_path):
backup_path = dll_path.with_suffix(".dlsss")
try:
await asyncio.to_thread(shutil.copy2, dll_path, backup_path)
logger.info(f"Created backup: {backup_path}")
return backup_path
except Exception as e:
logger.error(f"Failed to create backup for {dll_path}: {e}")
return None
async def update_dll(dll_path, latest_dll_path):
dll_path = Path(normalize_path(dll_path)).resolve()
latest_dll_path = Path(normalize_path(latest_dll_path)).resolve()
logger.info(f"Checking DLL at {dll_path}...")
# Determine DLL type
dll_type = DLL_TYPE_MAP.get(dll_path.name.lower(), "Unknown DLL type")
original_permissions = os.stat(dll_path).st_mode
try:
existing_version = get_dll_version(dll_path)
latest_version = get_dll_version(latest_dll_path)
if existing_version and latest_version:
existing_parsed = parse_version(existing_version)
latest_parsed = parse_version(latest_version)
logger.info(
f"Existing version: {existing_version}, Latest version: {latest_version}"
)
if existing_parsed < parse_version("2.0.0"):
logger.info(
f"Skipping update for {dll_path}: Version {existing_version} is less than 2.0.0 and cannot be updated."
)
return False, None, dll_type
if existing_parsed >= latest_parsed:
logger.info(
f"{dll_path} is already up-to-date (version {existing_version})."
)
return False, None, dll_type
else:
logger.info(f"Update needed: {existing_version} -> {latest_version}")
logger.info("Preparing to update...")
# Check if the target path exists
if not dll_path.exists():
logger.error(f"Error: Target DLL path does not exist: {dll_path}")
return False, None, dll_type
# Check if the latest DLL path exists
if not latest_dll_path.exists():
logger.error(f"Error: Latest DLL path does not exist: {latest_dll_path}")
return False, None, dll_type
# Ensure the target directory is writable
if not os.access(dll_path.parent, os.W_OK):
logger.error(
f"Error: No write permission to the directory: {dll_path.parent}"
)
return False, None, dll_type
# Create backup
logger.info("Creating backup...")
backup_path = await create_backup(dll_path)
if not backup_path:
logger.info(f"Skipping update for {dll_path} due to backup failure.")
return False, None, dll_type
logger.info("Checking file permissions...")
remove_read_only(dll_path)
logger.info("Checking if file is in use...")
retry_count = 3
while retry_count > 0:
if not await asyncio.to_thread(is_file_in_use, str(dll_path)):
break
logger.info(
f"File is in use. Retrying in 2 seconds... (Attempts left: {retry_count})"
)
await asyncio.sleep(2)
retry_count -= 1
if retry_count == 0:
logger.info(
f"File {dll_path} is still in use after multiple attempts. Cannot update."
)
restore_permissions(dll_path, original_permissions)
return False, None, dll_type
logger.info("Starting file copy...")
await asyncio.to_thread(shutil.copyfile, latest_dll_path, dll_path)
logger.info("File copy completed.")
# Restore original permissions
restore_permissions(dll_path, original_permissions)
logger.info(
f"Successfully updated {dll_path} from version {existing_version} to {latest_version}."
)
return True, backup_path, dll_type
except Exception as e:
logger.error(f"Error updating {dll_path}: {e}")
restore_permissions(dll_path, original_permissions)
return False, None, dll_type