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would call "setup.py egg_info" or "setup.py bdist_wheel" on the command line.
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2. Import this module into a safe python interpreter (one in which
setuptools can potentially set global variables or crash hard).
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- `get_requires_for_build_wheel`: get the `setup_requires` to build
- `prepare_metadata_for_build_wheel`: get the `install_requires`
- `build_sdist`: build an sdist in the folder and return the basename
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