🚸 Improve checks for offline cache directory specification

Author: kzscisoft

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Improves handling of Conda based environments in metadata collection.
 - Adds additional options to `Client.get_runs`.
 - Added ability to include environment variables within metadata for runs.
+- Improves checks on `offline.cache` directory specification in config file.
 
 ## [v2.1.2](https://github.com/simvue-io/client/releases/tag/v2.1.2) - 2025-06-25
 

simvue/config/parameters.py

@@ -7,7 +7,7 @@
 """
 
 import logging
-import re
+import os
 import time
 import pydantic
 import typing
@@ -53,10 +53,12 @@ class OfflineSpecifications(pydantic.BaseModel):
     @pydantic.field_validator("cache")
     @classmethod
     def check_valid_cache_path(cls, cache: pathlib.Path) -> pathlib.Path:
-        if not re.fullmatch(
-            r"^(\/|([a-zA-Z]:\\))?([\w\s.-]+[\\/])*[\w\s.-]*$", f"{cache}"
-        ):
-            raise AssertionError(f"Value '{cache}' is not a valid cache path.")
+        if not cache.parent.exists():
+            raise FileNotFoundError(f"No such directory '{cache.parent}'.")
+        if not cache.parent.is_dir():
+            raise FileNotFoundError(f"'{cache.parent}' is not a directory.")
+        if not os.access(cache.parent, os.W_OK):
+            raise AssertionError(f"'{cache.parent}' is not a writable location.")
         return cache