Replace 'setup.py sdist' with '-m build --sdist'

[hugovk]

Direct invocation of setup.py has been deprecated by setuptools, and there's a multi-year effort ongoing to replace its commands with other tools.

The long version:

• https://blog.ganssle.io/articles/2021/10/setup-py-deprecated.html

Direct calling isn't going away any time soon, but we should start to replace those that we can. Here's one of the simpler replacements.

I compared the generated Pillow-9.0.0.dev0.tar.gz with the old and new commands, and the contents were identical (except for this change to the Makefile).

---

We currently use these:

setup.py --long-description | markdown2 > .long-description.html && open .long-description.html
setup.py build --build-base=/tmp/build install
setup.py build_ext --enable-[feature] install
setup.py build_ext --inplace
setup.py build_ext --vendor-raqm --vendor-fribidi %*
setup.py build_ext install
setup.py clean
setup.py develop
setup.py develop build_ext --inplace
setup.py install
setup.py sdist --format=gztar

[radarhere]

https://docs.python.org/3/distutils/sourcedist.html

The default format is a gzip’ed tar file (.tar.gz) on Unix, and ZIP file on Windows.

So I think by removing the format argument, you're changing the Windows behaviour. I'm guessing that wasn't your intention though, and you just thought it wasn't necessary?

[hugovk]

build doesn't have a --format option and defaults to .tar.gz for all platforms:

• Docs: Use code formatting pypa/build#387 (comment)

Because PEP 517 only supports .tar.gz:

• https://www.python.org/dev/peps/pep-0517/#build-sdist

Which suits us fine.

[hugovk]

Direct invocation of setup.py has been deprecated by setuptools, and there's a multi-year effort ongoing to replace its commands with other tools.

setuptools v58.3.0 has now officially deprecated setup.py install https://setuptools.pypa.io/en/latest/history.html#v58-3-0

$ make install
python3 setup.py install
running install
/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
  warnings.warn(
/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/setuptools/command/easy_install.py:156: EasyInstallDeprecationWarning: easy_install command is deprecated. Use build and pip and other standards-based tools.
  warnings.warn(
running bdist_egg
running egg_info
writing src/Pillow.egg-info/PKG-INFO
...