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Previously, when a user or a command line tool (let's call it a "frontend")
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needed to make a request of setuptools to take a certain action, for
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example, generating a list of installation requirements, the frontend would
|
would call "setup.py egg_info" or "setup.py bdist_wheel" on the command line.
|
|
PEP 517 defines a different method of interfacing with setuptools. Rather
|
than calling "setup.py" directly, the frontend should:
|
|
1. Set the current directory to the directory with a setup.py file
|
2. Import this module into a safe python interpreter (one in which
|
setuptools can potentially set global variables or crash hard).
|
3. Call one of the functions defined in PEP 517.
|
|
What each function does is defined in PEP 517. However, here is a "casual"
|
definition of the functions (this definition should not be relied on for
|
bug reports or API stability):
|
|
- `build_wheel`: build a wheel in the folder and return the basename
|
- `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
|
- `get_requires_for_build_sdist`: get the `setup_requires` to build
|
|
Again, this is not a formal definition! Just a "taste" of the module.
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