IsADirectoryError for namespace packages when using --linecoverage-report #18128
Description
Crash Report
This is similar to #15979:
For namespace packages, e.g., when a package contains a data directory without any Python files, IsADirectoryError is raised when using the --linecoverage-report option. This happens when using the --package option, but not when passing the directory path.
Traceback
version: 1.13.0
Traceback (most recent call last):
File "/Users/home/mambaforge/envs/test-mypy/bin/mypy", line 8, in <module>
sys.exit(console_entry())
~~~~~~~~~~~~~^^
File "/Users/home/mambaforge/envs/test-mypy/lib/python3.13/site-packages/mypy/__main__.py", line 15, in console_entry
main()
~~~~^^
File "mypy/main.py", line 102, in main
File "mypy/main.py", line 186, in run_build
File "mypy/build.py", line 194, in build
File "mypy/build.py", line 269, in _build
File "mypy/build.py", line 2935, in dispatch
File "mypy/build.py", line 3333, in process_graph
File "mypy/build.py", line 3438, in process_stale_scc
File "mypy/build.py", line 2397, in finish_passes
File "mypy/build.py", line 873, in report_file
File "mypy/report.py", line 91, in file
File "mypy/report.py", line 426, in on_file
IsADirectoryError: [Errno 21] Is a directory: '/Users/home/mambaforge/envs/test-mypy/lib/python3.13/site-packages/test_package/data'
To Reproduce
- Create a package:
.
├── src/
│ └── test_package/
│ ├── data/
│ │ └── test.txt
│ ├── __init__.py
│ └── py.typed
└── pyproject.toml
with pyproject.toml:
[project]
name = "test_package"
version = "0.0.0"
[build-system]
requires = ["setuptools >= 72.1.0"]
build-backend = "setuptools.build_meta"
[tool]
[tool.setuptools]
include-package-data = true
[tool.setuptools.packages.find]
where = ["src"]
namespaces = true- Install the package:
pip install . - Run mypy:
mypy --package test_package --linecoverage-report . --raise-exceptions
Your Environment
- Mypy version used: mypy 1.13.0 (compiled: yes)
- Mypy command-line flags:
--package,--linecoverage-report,--raise-exceptions - Python version used: 3.13.0
- Operating system and version: macOS 13.7