How to install Pillow for PyPy on Travis CI?

[hugovk]

I understand Pillow should be supported for Pypy (e.g. see #67 and https://bitbucket.org/pypy/compatibility/wiki/Home).

See this build of Pillow. Python 2.x and 3.x pass, but PyPy errors:
https://travis-ci.org/hugovk/Pillow/builds/21429853

The only change is adding "pypy" to .travis.yml as an allowed failure:
hugovk@2bbc7f0

All 98 tests fail with PyPy because of a failing python setup.py clean (see https://travis-ci.org/hugovk/Pillow/jobs/21429858):

$ pip install cffi
Requirement already satisfied (use --upgrade to upgrade): cffi in /usr/local/pypy/lib_pypy
Cleaning up...
$ python setup.py clean
Traceback (most recent call last):
  File "app_main.py", line 72, in run_toplevel
  File "setup.py", line 82, in <module>
    import _tkinter
  File "/usr/local/pypy/lib_pypy/_tkinter/__init__.py", line 13, in <module>
    from .tklib import tklib, tkffi
  File "/usr/local/pypy/lib_pypy/_tkinter/tklib.py", line 137, in <module>
    library_dirs = libdirs
  File "/usr/local/pypy/lib_pypy/cffi/api.py", line 339, in verify
    lib = self.verifier.load_library()
  File "/usr/local/pypy/lib_pypy/cffi/verifier.py", line 75, in load_library
    return self._load_library()
  File "/usr/local/pypy/lib_pypy/cffi/verifier.py", line 151, in _load_library
    return self._vengine.load_library()
  File "/usr/local/pypy/lib_pypy/cffi/vengine_gen.py", line 66, in load_library
    module = backend.load_library(filename)
OSError: Cannot load library /usr/local/pypy/lib_pypy/_tkinter/__pycache__/_cffi__g23e32416x3547cfed.pypy-22.so: libtcl8.5.so.0: cannot open shared object file: No such file or directory
The command "python setup.py clean" exited with 1.
$ python setup.py build_ext --inplace
Traceback (most recent call last):
  File "app_main.py", line 72, in run_toplevel
  File "setup.py", line 82, in <module>
    import _tkinter
  File "/usr/local/pypy/lib_pypy/_tkinter/__init__.py", line 13, in <module>
    from .tklib import tklib, tkffi
  File "/usr/local/pypy/lib_pypy/_tkinter/tklib.py", line 137, in <module>
    library_dirs = libdirs
  File "/usr/local/pypy/lib_pypy/cffi/api.py", line 339, in verify
    lib = self.verifier.load_library()
  File "/usr/local/pypy/lib_pypy/cffi/verifier.py", line 75, in load_library
    return self._load_library()
  File "/usr/local/pypy/lib_pypy/cffi/verifier.py", line 151, in _load_library
    return self._vengine.load_library()
  File "/usr/local/pypy/lib_pypy/cffi/vengine_gen.py", line 66, in load_library
    module = backend.load_library(filename)
OSError: Cannot load library /usr/local/pypy/lib_pypy/_tkinter/__pycache__/_cffi__g23e32416x3547cfed.pypy-22.so: libtcl8.5.so.0: cannot open shared object file: No such file or directory

The command "python setup.py build_ext --inplace" exited with 1.

The command "python setup.py build_ext --inplace" exited with 1.
$ python selftest.py
Traceback (most recent call last):
  File "app_main.py", line 72, in run_toplevel
  File "selftest.py", line 11, in <module>
    from PIL import Image, ImageDraw, ImageFilter, ImageMath
  File "/home/travis/build/hugovk/Pillow/PIL/Image.py", line 53, in <module>
    from PIL import _imaging as core
ImportError: cannot import name '_imaging'
The command "python selftest.py" exited with 1.

Is the problem with Pillow's setup, Pillow's Travis config, Travis CI itself or PyPy?

This isn't a priority for me, I just noticed Pypy is available on Travis so added it to my build. Here's a failing pip install Pillow with PyPy:
https://travis-ci.org/hugovk/pixel-tools/jobs/21493553

[wiredfool]

I think it's a Travis thing. There's a bit in the do somewhere that mentions that installing or building c extensions on pypy will fail. (http://docs.travis-ci.com/user/languages/python/#PyPy-Support)

The tests all pass on pypy on my local machine ( or at least they did a month ago)

[hugovk]

I just found this issue on the Travis CI repo travis-ci/travis-ci#1654 and they think it's a PyPy issue.

But I've just tried some things and Pillow installed for PyPy on Travis and all the tests passed:
https://travis-ci.org/hugovk/Pillow/builds/21522757

All that was needed was a "sudo apt-get install python-tk" in the .travis.yml. I'll make a PR.

But perhaps the install should only happen for the PyPy build, what do you think? And should PyPy be an allowed failure or would you prefer a normal build?

[squeaky-pl]

AFAIK there is pypy-tk package if you want to use tkinter under PyPy. Tk support package is separated to follow CPython packaging practices since it is rarely used.