Handle os.path.devnull access issues (#2579)

Our release checking can fail because os.path.devnull is not there/is not properly accessible on some setups.

sentry_sdk/utils.py

@@ -21,7 +21,6 @@
     from urllib.parse import urlencode
     from urllib.parse import urlsplit
     from urllib.parse import urlunsplit
-
 except ImportError:
     # Python 2
     from cgi import parse_qs  # type: ignore
@@ -30,6 +29,13 @@
     from urlparse import urlsplit  # type: ignore
     from urlparse import urlunsplit  # type: ignore
 
+try:
+    # Python 3
+    FileNotFoundError
+except NameError:
+    # Python 2
+    FileNotFoundError = IOError
+
 try:
     # Python 3.11
     from builtins import BaseExceptionGroup
@@ -97,8 +103,8 @@ def _get_debug_hub():
 
 def get_git_revision():
     # type: () -> Optional[str]
-    with open(os.path.devnull, "w+") as null:
-        try:
+    try:
+        with open(os.path.devnull, "w+") as null:
             revision = (
                 subprocess.Popen(
                     ["git", "rev-parse", "HEAD"],
@@ -110,8 +116,8 @@ def get_git_revision():
                 .strip()
                 .decode("utf-8")
             )
-        except (OSError, IOError):
-            return None
+    except (OSError, IOError, FileNotFoundError):
+        return None
 
     return revision
 

tests/test_utils.py

@@ -6,6 +6,7 @@
     Components,
     Dsn,
     get_error_message,
+    get_git_revision,
     is_valid_sample_rate,
     logger,
     match_regex_list,
@@ -25,6 +26,13 @@
 except ImportError:
     import mock  # python < 3.3
 
+try:
+    # Python 3
+    FileNotFoundError
+except NameError:
+    # Python 2
+    FileNotFoundError = IOError
+
 
 def _normalize_distribution_name(name):
     # type: (str) -> str
@@ -557,3 +565,17 @@ def test_installed_modules_caching():
 
             _get_installed_modules()
             mock_generate_installed_modules.assert_not_called()
+
+
+def test_devnull_inaccessible():
+    with mock.patch("sentry_sdk.utils.open", side_effect=OSError("oh no")):
+        revision = get_git_revision()
+
+    assert revision is None
+
+
+def test_devnull_not_found():
+    with mock.patch("sentry_sdk.utils.open", side_effect=FileNotFoundError("oh no")):
+        revision = get_git_revision()
+
+    assert revision is None