SNOW-1825673 use tmdir in case of Permission error

src/snowflake/connector/sf_dirs.py

@@ -7,7 +7,9 @@
 import os
 import pathlib
 from functools import cached_property
+from tempfile import TemporaryDirectory
 from typing import Protocol
+from warnings import warn
 
 from platformdirs import PlatformDirs
 
@@ -34,17 +36,30 @@ def _resolve_platform_dirs() -> PlatformDirsProto:
     snowflake_home = pathlib.Path(
         os.environ.get("SNOWFLAKE_HOME", "~/.snowflake/"),
     ).expanduser()
-    if snowflake_home.exists():
+    try:
+        if snowflake_home.exists():
+            return SFPlatformDirs(
+                str(snowflake_home),
+                **platformdir_kwargs,
+            )
+        else:
+            # In case SNOWFLAKE_HOME does not exist we fall back to using
+            # platformdirs to determine where system files should be placed. Please
+            # see docs for all the directories defined in the module at
+            # https://platformdirs.readthedocs.io/
+            return PlatformDirs(**platformdir_kwargs)
+    except PermissionError as pe:
+        tmp_dir = TemporaryDirectory(
+            suffix="_snowflake", ignore_cleanup_errors=True
+        )
+        warn(
+            f"Received permission error while checking if {snowflake_home} exists. Continue with temporary direcoty `{tmp_dir.name}`.\n"
+            f"Original Error: {pe}"
+        )
         return SFPlatformDirs(
-            str(snowflake_home),
+            str(tmp_dir.name),
             **platformdir_kwargs,
         )
-    else:
-        # In case SNOWFLAKE_HOME does not exist we fall back to using
-        # platformdirs to determine where system files should be placed. Please
-        # see docs for all the directories defined in the module at
-        # https://platformdirs.readthedocs.io/
-        return PlatformDirs(**platformdir_kwargs)
 
 
 class SFPlatformDirs:

test/unit/test_connector_sf_dirs.py

@@ -0,0 +1,11 @@
+from unittest import mock
+
+from snowflake.connector.sf_dirs import SFPlatformDirs, _resolve_platform_dirs
+
+
+@mock.patch("pathlib.Path.exists", side_effect=PermissionError)
+def test_snowflake_home_permission_error(self):
+    platform_dirs = _resolve_platform_dirs()
+    assert isinstance(platform_dirs, SFPlatformDirs)
+    assert platform_dirs.user_config_path.name.endswith("_snowflake")
+    assert platform_dirs.user_config_path.name.startswith("tmp")