[Pillow] Removed python symlink

[radarhere]

Pillow's oss-fuzz is currently failing, because Pillow main has dropped support for Python 3.8.

#12027 attempts to resolve this by upgrading the base builder to Python 3.10, but the latest status update over there says that Pillow fails in that branch with

Step 17: Step 6/11 : RUN ln -s /usr/local/bin/python3 /usr/local/bin/python && ln -s /bin/true /usr/local/bin/yum_install && ln -s /bin/true /usr/local/bin/yum && cd $SRC/Pillow && git submodule update --init wheels/multibuild && bash $SRC/build_depends.sh
Step 17: ---> Running in 932abd1dc89a
Step 17: �[91mln: failed to create symbolic link '/usr/local/bin/python': File exists

So this pull request removes the python symlink in order to try and help.

cc @hugovk

[github-actions]

radarhere has previously contributed to projects/pillow. The previous PR was #11267

[radarhere]

https://github.com/google/oss-fuzz/actions/runs/10331059544/job/28600812260?pr=12326#step:6:12

Changed files: projects/pillow/Dockerfile
Please add an "apt-get update" before "apt-get install". Otherwise, a cached and outdated RUN layer may lead to install failures.
Failed.

Hmm. I would have thought that is what is happening?

[DaveLak]

Hmm. I would have thought that is what is happening?

@radarhere I think that check is failing because of the install at the bottom of the file:

https://github.com/radarhere/oss-fuzz/blob/7832cf88a3085810ed2389183b85e42e68a2fc3e/projects/pillow/Dockerfile#L46

---

Also, thanks for investigating the failure in #12027!

Out of curiosity, did the changes here work for you locally?

Part of the changes I propose in that PR are aliasing the python3 and python executables in the base images and last I checked, only python3 was available in the currently deployed images.

If it turns out that this does depends on the unmerged changes:

I've been collecting patches that will be required after a Python 3.10 upgrade on a per broken project basis here: master...DaveLak:oss-fuzz:update-projects-after-python-10-upgrade and that includes Pillow's, dcd020c

[radarhere]

@radarhere I think that check is failing because of the install at the bottom of the file:

https://github.com/radarhere/oss-fuzz/blob/7832cf88a3085810ed2389183b85e42e68a2fc3e/projects/pillow/Dockerfile#L46

You're right, thanks - I've pushed a commit, and presubmit checks are satisfied now.

[DonggeLiu]

I reckon the CI failed due to incompatible python version?

ERROR: Package 'pillow' requires a different Python: 3.8.3 not in '>=3.9'
ERROR:__main__:Building fuzzers failed.

[radarhere]

Pillow dropped support for Python 3.8, so the error is already happening in master.

This PR isn't intended to fix Pillow's oss-fuzz completely, merely to try and help the final solution of #12027.

[DonggeLiu]

Yep, I will merge, then