refactor: switch to pathlib.Path in cvedb.py (#1751)

* refactor: switch to pathlib.Path in cvedb.py

* fix: windows tests

cve_bin_tool/cvedb.py

@@ -9,9 +9,9 @@
 import asyncio
 import datetime
 import logging
-import os
 import shutil
 import sqlite3
+from pathlib import Path
 from typing import Any
 
 import requests
@@ -26,12 +26,10 @@
 logging.basicConfig(level=logging.DEBUG)
 
 # database defaults
-DISK_LOCATION_DEFAULT = os.path.join(os.path.expanduser("~"), ".cache", "cve-bin-tool")
-DISK_LOCATION_BACKUP = os.path.join(
-    os.path.expanduser("~"), ".cache", "cve-bin-tool-backup"
-)
+DISK_LOCATION_DEFAULT = Path("~").expanduser() / ".cache" / "cve-bin-tool"
+DISK_LOCATION_BACKUP = Path("~").expanduser() / ".cache" / "cve-bin-tool-backup"
 DBNAME = "cve.db"
-OLD_CACHE_DIR = os.path.join(os.path.expanduser("~"), ".cache", "cvedb")
+OLD_CACHE_DIR = Path("~") / ".cache" / "cvedb"
 
 
 class CVEDB:
@@ -58,9 +56,11 @@ def __init__(
             if sources is not None
             else [x(error_mode=error_mode) for x in self.SOURCES]
         )
-        self.cachedir = cachedir if cachedir is not None else self.CACHEDIR
+        self.cachedir = Path(cachedir) if cachedir is not None else self.CACHEDIR
         self.backup_cachedir = (
-            backup_cachedir if backup_cachedir is not None else self.BACKUPCACHEDIR
+            Path(backup_cachedir)
+            if backup_cachedir is not None
+            else self.BACKUPCACHEDIR
         )
         self.error_mode = error_mode
 
@@ -71,7 +71,7 @@ def __init__(
         self.version_check = version_check
 
         # set up the db if needed
-        self.dbpath = os.path.join(self.cachedir, DBNAME)
+        self.dbpath = self.cachedir / DBNAME
         self.connection: sqlite3.Connection | None = None
 
         self.data = []
@@ -81,7 +81,7 @@ def __init__(
         self.exploits_list = []
         self.exploit_count = 0
 
-        if not os.path.exists(self.dbpath):
+        if not self.dbpath.exists():
             self.rollback_cache_backup()
 
     def get_cve_count(self) -> int:
@@ -91,20 +91,20 @@ def get_cve_count(self) -> int:
         return self.cve_count
 
     def check_db_exists(self) -> bool:
-        return os.path.isfile(self.dbpath)
+        return self.dbpath.is_file()
 
     def get_db_update_date(self) -> float:
         # last time when CVE data was updated
         self.time_of_last_update = datetime.datetime.fromtimestamp(
-            os.path.getmtime(self.dbpath)
+            self.dbpath.stat().st_mtime
         )
-        return os.path.getmtime(self.dbpath)
+        return self.dbpath.stat().st_mtime
 
     async def refresh(self) -> None:
         """Refresh the cve database and check for new version."""
         # refresh the database
-        if not os.path.isdir(self.cachedir):
-            os.makedirs(self.cachedir)
+        if not self.cachedir.is_dir():
+            self.cachedir.mkdir(parents=True)
 
         # check for the latest version
         if self.version_check:
@@ -125,15 +125,15 @@ def get_cvelist_if_stale(self) -> None:
         """Update if the local db is more than one day old.
         This avoids the full slow update with every execution.
         """
-        if not os.path.isfile(self.dbpath) or (
+        if not self.dbpath.is_file() or (
             datetime.datetime.today()
-            - datetime.datetime.fromtimestamp(os.path.getmtime(self.dbpath))
+            - datetime.datetime.fromtimestamp(self.dbpath.stat().st_mtime)
         ) > datetime.timedelta(hours=24):
             self.refresh_cache_and_update_db()
             self.time_of_last_update = datetime.datetime.today()
         else:
             self.time_of_last_update = datetime.datetime.fromtimestamp(
-                os.path.getmtime(self.dbpath)
+                self.dbpath.stat().st_mtime
             )
             self.LOGGER.info(
                 "Using cached CVE data (<24h old). Use -u now to update immediately."
@@ -315,11 +315,11 @@ def populate_affected(self, affected_data, cursor):
 
     def clear_cached_data(self) -> None:
         self.create_cache_backup()
-        if os.path.exists(self.cachedir):
+        if self.cachedir.exists():
             self.LOGGER.warning(f"Updating cachedir {self.cachedir}")
             shutil.rmtree(self.cachedir)
         # Remove files associated with pre-1.0 development tree
-        if os.path.exists(OLD_CACHE_DIR):
+        if OLD_CACHE_DIR.exists():
             self.LOGGER.warning(f"Deleting old cachedir {OLD_CACHE_DIR}")
             shutil.rmtree(OLD_CACHE_DIR)
 
@@ -381,7 +381,7 @@ def db_close(self) -> None:
 
     def create_cache_backup(self) -> None:
         """Creates a backup of the cachedir in case anything fails"""
-        if os.path.exists(self.cachedir):
+        if self.cachedir.exists():
             self.LOGGER.debug(
                 f"Creating backup of cachedir {self.cachedir} at {self.backup_cachedir}"
             )
@@ -397,15 +397,15 @@ def copy_db(self, filename, export=True):
 
     def remove_cache_backup(self) -> None:
         """Removes the backup if database was successfully loaded"""
-        if os.path.exists(self.backup_cachedir):
+        if self.backup_cachedir.exists():
             self.LOGGER.debug(f"Removing backup cache from {self.backup_cachedir}")
             shutil.rmtree(self.backup_cachedir)
 
     def rollback_cache_backup(self) -> None:
         """Rollback the cachedir backup in case anything fails"""
-        if os.path.exists(os.path.join(self.backup_cachedir, DBNAME)):
+        if (self.backup_cachedir / DBNAME).exists():
             self.LOGGER.info("Rolling back the cache to its previous state")
-            if os.path.exists(self.cachedir):
+            if self.cachedir.exists():
                 shutil.rmtree(self.cachedir)
             shutil.move(self.backup_cachedir, self.cachedir)