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Isolate mypy cache per pytest-xdist worker #196

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Merged
sobolevn merged 1 commit into from
Jul 3, 2026
Merged

Isolate mypy cache per pytest-xdist worker #196

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5 changes: 5 additions & 0 deletions pytest_mypy_plugins/item.py
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Original file line number Diff line number Diff line change
Expand Up @@ -365,6 +365,11 @@ def __init__(
self.base_pyproject_toml_fpath = None
self.incremental_cache_dir = os.path.join(self.root_directory, ".mypy_cache")

# The mypy cache is not safe for concurrent use;
# give each `pytest-xdist` worker its own cache directory.
if xdist_worker := os.environ.get("PYTEST_XDIST_WORKER"):
self.incremental_cache_dir = os.path.join(self.incremental_cache_dir, xdist_worker)

def remove_cache_files(self, fpath_no_suffix: Path) -> None:
cache_dir = os.path.join(
self.incremental_cache_dir,
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