Handles PermissionError

src/gpu_tracker/_helper_classes.py

@@ -10,6 +10,7 @@
 import sqlalchemy.orm as sqlorm
 import enum
 import tqdm
+import logging as log
 
 _SUMMARY_STATS = ['min', 'max', 'mean', 'std']
 
@@ -36,6 +37,12 @@ def is_available(cls) -> bool | None:
             return False
         except FileNotFoundError:
             return None
+        except PermissionError:
+            log.warning(
+                f'gpu-tracker encountered a PermissionError when checking if "{cls.command}" is installed. '
+                'You might have a directory in your PATH environment variable that lacks execute permissions.'
+            )
+            return None
 
     @classmethod
     @abc.abstractmethod

tests/test_tracker.py

@@ -402,3 +402,13 @@ def test_formatting_before_tracking_stops():
         'Cannot display the tracker in string or JSON format before tracking completes. Exit the content manager or call the stop() '
         'method before calling to_json() or str()'
     )
+
+
+def test_is_available_permission_error(mocker, caplog):
+    mocker.patch('gpu_tracker._helper_classes.subp.check_output', side_effect=PermissionError)
+    # noinspection PyProtectedMember
+    from gpu_tracker._helper_classes import _NvidiaQuerier
+    result = _NvidiaQuerier.is_available()
+    assert result is None
+    assert 'PermissionError' in caplog.text
+    assert 'nvidia-smi' in caplog.text