Issue 4341 - Make flake8-abp compatible with flake8 3.0

flake8-abp/setup.py

 # This file is part of Adblock Plus <https://adblockplus.org/>,
 # Copyright (C) 2006-2016 Eyeo GmbH
 #
 # Adblock Plus is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 3 as
 # published by the Free Software Foundation.
 #
 # Adblock Plus is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@@ skipping 62 matching lines @@
 
         return errors
 
     def initialize_options(self):
         pass
 
     def finalize_options(self):
         pass
 
     def run(self):
-        import flake8.engine
+        try:
+            import flake8.engine as api
+        except ImportError:
+            import flake8.api.legacy as api
 
         directory = os.path.dirname(__file__)
         filenames = glob.glob(os.path.join(directory, 'tests', '*.py'))
-        style_guide = flake8.engine.get_style_guide()
+        style_guide = api.get_style_guide()
         failed = False
 
         for filename in sorted(filenames):
             expected = self._get_expected_errors(filename)
             reported = self._get_reported_errors(filename, style_guide)
             failures = expected ^ reported
 
             if not failures:
                 print(filename + ': OK')
                 continue
@@ skipping 12 matching lines @@
         if failed:
             sys.exit(1)
 
 
 setup(
     name='flake8-abp',
     version='0.1',
     py_modules=['flake8_abp'],
     entry_points={
         'flake8.extension': [
-            'AXXX      = flake8_abp:ASTChecker',
-            'A109-A110 = flake8_abp:check_quotes',
-            'A111      = flake8_abp:check_redundant_parenthesis',
-            'A303      = flake8_abp:check_non_default_encoding',
+            'A    = flake8_abp:ASTChecker',
+            'A1   = flake8_abp:check_quotes',
+            'A111 = flake8_abp:check_redundant_parenthesis',
+            'A303 = flake8_abp:check_non_default_encoding',
         ],
     },
     cmdclass={'test': TestCommand}
 )