Pillow setup.py find_library_file logic issue

[tao12345666333]

What did you do?

Install Pillow by source code

What did you expect to happen?

Install successfully.

What actually happened?

Build error.

  During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-req-build-_pl57v2h/setup.py", line 807, in <module>
    raise RequiredDependencyException(msg)
__main__.RequiredDependencyException:

The headers or library files could not be found for zlib,
a required dependency when compiling Pillow from source.

What versions of Pillow and Python are you using?

Pillow：
Pillow-5.2.0
Python:
Python 3.7.0

detail see: docker-library/python#305

Because the library_dirs lose /usr/lib/x86_64-linux-gnu or /lib/x86_64-linux-gnu

[tao12345666333]

The https://github.com/python-pillow/Pillow/blob/5.2.x/setup.py#L736 dpkg-architecture tool need install dpkg-dev to use.

[pslacerda]

The following warn/todo happened: https://github.com/python-pillow/Pillow/blob/5.2.x/setup.py#L340

[radarhere]

@tao12345666333 so to be clear, if you install dpkg-dev, installation works fine, and you're just interested in Pillow installation working without that requirement?

[tao12345666333]

@radarhere yes. I want to find a way install Pillow without dpkg-dev requirement.

[hugovk]

docker-library/python#305 (comment) says:

dpkg-dev has not existed in the python:3 image since docker-library/python@cd1f11a. This is an oversight on our part and we will look to change the build dependency installation to be more like docker-library/php#556 so that this won't happen in the future.

It was added back in docker-library/python#310.

Does that fix it?

[tao12345666333]

@hugovk Thanks. It has fixed.

(Tao) ➜  docker git:(master) ✗ docker run -it --rm python:3.7.0-stretch /bin/bash
root@f1eb0b20daa2:/# cd /tmp/
root@f1eb0b20daa2:/tmp# 
root@f1eb0b20daa2:/tmp# wget https://files.pythonhosted.org/packages/d3/c4/b45b9c0d549f482dd072055e2d3ced88f3b977f7b87c7a990228b20e7da1/Pillow-5.2.0.tar.gz 
--2018-09-18 03:07:52--  https://files.pythonhosted.org/packages/d3/c4/b45b9c0d549f482dd072055e2d3ced88f3b977f7b87c7a990228b20e7da1/Pillow-5.2.0.tar.gz
Resolving files.pythonhosted.org (files.pythonhosted.org)... 151.101.65.63, 151.101.193.63, 151.101.1.63, ...
Connecting to files.pythonhosted.org (files.pythonhosted.org)|151.101.65.63|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 14499068 (14M) [binary/octet-stream]
Saving to: ‘Pillow-5.2.0.tar.gz’

Pillow-5.2.0.tar.gz            100%[===================================================>]  13.83M  8.53MB/s    in 1.6s    

2018-09-18 03:07:55 (8.53 MB/s) - ‘Pillow-5.2.0.tar.gz’ saved [14499068/14499068]

root@f1eb0b20daa2:/tmp# pip install Pillow-5.2.0.tar.gz 
Processing ./Pillow-5.2.0.tar.gz
Building wheels for collected packages: Pillow
  Running setup.py bdist_wheel for Pillow ... done
  Stored in directory: /root/.cache/pip/wheels/19/4b/f9/db70c6f140d97dc73399e3b03ce2c748c2b09f8e507d325f27
Successfully built Pillow
Installing collected packages: Pillow
Successfully installed Pillow-5.2.0
root@f1eb0b20daa2:/tmp# 
root@f1eb0b20daa2:/tmp#