Major fixes and new features

venv/lib/python3.12/site-packages/mypy/test/config.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+import os.path
+
+provided_prefix = os.getenv("MYPY_TEST_PREFIX", None)
+if provided_prefix:
+    PREFIX = provided_prefix
+else:
+    this_file_dir = os.path.dirname(os.path.realpath(__file__))
+    PREFIX = os.path.dirname(os.path.dirname(this_file_dir))
+
+# Location of test data files such as test case descriptions.
+test_data_prefix = os.path.join(PREFIX, "test-data", "unit")
+package_path = os.path.join(PREFIX, "test-data", "packages")
+
+# Temp directory used for the temp files created when running test cases.
+# This is *within* the tempfile.TemporaryDirectory that is chroot'ed per testcase.
+# It is also hard-coded in numerous places, so don't change it.
+test_temp_dir = "tmp"
+
+# The PEP 561 tests do a bunch of pip installs which, even though they operate
+# on distinct temporary virtual environments, run into race conditions on shared
+# file-system state. To make this work reliably in parallel mode, we'll use a
+# FileLock courtesy of the tox-dev/py-filelock package.
+# Ref. https://github.com/python/mypy/issues/12615
+# Ref. mypy/test/testpep561.py
+pip_lock = os.path.join(package_path, ".pip_lock")
+pip_timeout = 60