Release Pillow 8.3.0 on July 1, 2021

[hugovk]

Add release notes

• Allow getexif() to access TIFF tag_v2 data #5416
• Improved getxmp() #5455
• Add DDS saving #5402

Main Release

Released quarterly on January 2nd, April 1st, July 1st and October 15th.

• Open a release ticket e.g. Release Pillow 5.2.0 on July 1, 2018 #3154
• Develop and prepare release in master branch.
• Check GitHub Actions and AppVeyor to confirm passing tests in master branch.
• Check that all of the wheel builds Pillow Wheel Builder pass the tests in Travis CI and GitHub Actions.
• In compliance with PEP 440, update version identifier in src/PIL/_version.py
• Update CHANGES.rst.
• Run pre-release check via make release-test in a freshly cloned repo.
• Create branch and tag for release e.g.:

  git branch 8.3.x
  git tag 8.3.0
  git push --all
  git push --tags

• Create and check source distribution:

  make sdist
  twine check dist/*

• Create binary distributions
• Check and upload all binaries and source distributions e.g.:

  twine check dist/*
  twine upload dist/Pillow-8.3.0*

• Publish the release on GitHub
• In compliance with PEP 440, increment and append .dev0 to version identifier in src/PIL/_version.py

Binary Distributions

Windows

• Contact @cgohlke for Windows binaries via release ticket e.g. Release 2.9.0 on July 1, 2015 #1174.
• Download and extract tarball from @cgohlke and copy into dist/

Mac and Linux

• Use the Pillow Wheel Builder:

  git clone https://github.com/python-pillow/pillow-wheels
  cd pillow-wheels
  ./update-pillow-tag.sh [[release tag]]

• Download wheels from the Pillow Wheel Builder release
  and copy into dist/

Publicize Release

• Announce release availability via Twitter e.g. https://twitter.com/PythonPillow/status/1013789184354603010

Documentation

• Make sure the default version for Read the Docs is up-to-date with the release changes

Docker Images

• Update Pillow in the Docker Images repository

  git clone https://github.com/python-pillow/docker-images
  cd docker-images
  ./update-pillow-tag.sh [[release tag]]

[radarhere]

Hi @cgohlke, could we have Windows binaries for 8.3.0?

[nulano]

I had to disable feature.raqm, otherwise _imagingft.pyd would depend on raqm.dll on my system.

To solve some runtime linking issues with wheels on Linux, in #5062 I proposed some changes that turned out to be difficult to compile from source with pip (because Raqm is C99, which is incompatible with GCC defaults on some systems). So these changes should only be enabled when building release wheels, which requires building with the new --global-option --vendor-raqm --global-option --vendor-fribidi flags as seen here: python-pillow/pillow-wheels#181 (comment) Those prevent _imagingft.pyd from having a dependency on raqm.dll, and it should instead link fribidi.dll at runtime.

[radarhere]

Thanks @cgohlke!

Released, and announced!

[aclark4life]

And pinned!

[hugovk]

Looks like we need an 8.3.1 patch release: #5571 is affecting lots who use NumPy either directly or indirectly (like torchvision), and there's a PR at #5572.

And separately, Windows wheels would benefit from a new dependency, so a patch release would help there: #5573 (comment)

Is there anything else urgent that warrants inclusion in 8.3.1?

[radarhere]

There are some flags in #5413 (comment) that cgohlke needs to apply to releases to resolve #4859. Not urgent, but something to flag for the next release.

[wiredfool]

On the bright side, I'm about 1.5 core months into a fuzzing run on a 8.3 near prerelease and nothing has come up.

[radarhere]

It would be good to include fixes for #5580 and #5583

[hugovk]

It would be good to include fixes for #5580 and #5583

Agreed, let's include those regression fixes. Thanks for the PRs, I've merged them to master.

I think we're ready to do 8.3.1? @radarhere Can you do it? If not, I can do it this evening (Europe time).

[radarhere]

Sure, I can do it. Closing. Future discussion can be in #5578