Dependency not satisfied even if pillow installed

[Ryan J Ollos]

In #11031 / [11730] the code was modified to support pillow in addition to pil. However, since [4181], the package PIL is required in setup.py. Installing Pillow doesn't seem to be sufficient to satisfy the dependency.

I don't see a simple way to specify Pillow or PIL in setup.py's extras_require. It might be easiest, since PIL doesn't seem to be maintained any longer, to just require Pillow.

# ./trac-hacks.org/pve/bin/python
Python 2.7.9 (default, Mar  1 2015, 12:57:24) 
[GCC 4.9.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pkg_resources
>>> pkg_resources.get_distribution('pillow').version
'2.9.0'

For now I just use the following in my install scripts:

sed -i -e 's/pil/pillow/g' $src/spam-filter/setup.py

[Ryan J Ollos]

Another consideration - when branching for Trac 1.2, support for Pillow < 2 can be dropped. See Pillow's ​supported python versions.

[Ryan J Ollos]

Note to update SpamFilter#Requirements if requirements are changed to use Pillow.

[Ryan J Ollos]

Found the following in the logs, possibly relevant:

2015-09-23 22:59:03,863 Trac[main] ERROR: Internal Server Error: <RequestWithSession "GET '/captcha/image'">, referrer 'https://trac-hacks.org/captcha'
Traceback (most recent call last):
  File "build/bdist.linux-i686/egg/trac/web/main.py", line 554, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.linux-i686/egg/trac/web/main.py", line 247, in dispatch
    resp = chosen_handler.process_request(req)
  File "/srv/trac-hacks.org/pve/lib/python2.6/site-packages/TracSpamFilter-1.0.6.dev0-py2.6.egg/tracspamfilter/captcha/image.py", line 80, in process_request
    self.font_size)
  File "/srv/trac-hacks.org/pve/lib/python2.6/site-packages/TracSpamFilter-1.0.6.dev0-py2.6.egg/tracspamfilter/captcha/image.py", line 108, in gen_captcha
    font = ImageFont.truetype(fnt,fnt_sz)
  File "/usr/lib/python2.6/dist-packages/PIL/ImageFont.py", line 218, in truetype
    return FreeTypeFont(filename, size, index, encoding)
  File "/usr/lib/python2.6/dist-packages/PIL/ImageFont.py", line 134, in __init__
    self.font = core.getfont(file, size, index, encoding)
IOError: cannot open resource