Fixed compatibility with latest pep257.

pep257 significantly changed configuration handling from 0.6.0 to 0.7.0.
Looks like they support multiple config files that apply only to that
directory and its subdirectories. But the change impacting flake8-pep257
was that pep257 no longer exposes 'ignore' config settings.

Instead it reads the 'ignore' value in a private method and then
subtracts it from all valid error codes and exposes that. Flake8 doesn't
behave this way.

This fix implements my own config file reader using a couple of public
APIs, reading only the top-most (current working directory) config file
(same behavior as pep257 0.6.0).

Fixes #4

README.rst

@@ -62,6 +62,12 @@ Changelog
 
 This project adheres to `Semantic Versioning <http://semver.org/>`_.
 
+1.0.4 - 2015-11-14
+------------------
+
+Fixed
+    * pep257 v0.7.0 compatibility.
+
 1.0.3 - 2015-05-31
 ------------------
 

flake8_pep257.py

@@ -5,6 +5,7 @@
 """
 
 import codecs
+import os
 
 import pep257
 import pep8
@@ -78,11 +79,18 @@ def parse_options(cls, options):
         cls.options['ignore'] = options.ignore
 
         # Handle pep257 options.
-        opt_parser = pep257.get_option_parser()
-        setattr(opt_parser, '_get_args', lambda *_: list())
-        native_options = vars(pep257.get_options(['.'], opt_parser))
-        native_options.pop('match', None)
-        native_options.pop('match_dir', None)
+        config = pep257.RawConfigParser()
+        for file_name in pep257.ConfigurationParser.PROJECT_CONFIG_FILES:
+            if config.read(os.path.join(os.path.abspath('.'), file_name)):
+                break
+        if not config.has_section('pep257'):
+            return
+        native_options = dict()
+        for option in config.options('pep257'):
+            if option == 'ignore':
+                native_options['ignore'] = config.get('pep257', option)
+            if option in ('explain', 'source'):
+                native_options[option] = config.getboolean('pep257', option)
         native_options['show-source'] = native_options.pop('source', None)
         if native_options.get('ignore'):
             native_options['ignore'] = native_options['ignore'].split(',')

setup.py

@@ -50,13 +50,13 @@ def safe_read(path):
     ],
     description='Flake8 plugin for the pep257 Python utility.',
     entry_points={'flake8.extension': 'D = flake8_pep257:Main'},
-    install_requires=['flake8', 'pep257<0.7.0'],
+    install_requires=['flake8', 'pep257'],
     keywords='flake8 pep257 docstrings',
     license='MIT',
     long_description=safe_read('README.rst'),
     name='flake8-pep257',
     py_modules=['flake8_pep257'],
     url='https://github.com/Robpol86/flake8-pep257',
-    version='1.0.3',
+    version='1.0.4',
     zip_safe=True,
 )