Update for latest flake8 release

Update to use new API methods from flake8 3.x. Note that this does
change the minimum version of flake8 to 3.0.

Fixes #7

CHANGELOG

@@ -1,3 +1,8 @@
+0.6
+---
+
+- Update for flake8 3.x
+
 0.5
 ---
 

pytest_flake8.py

@@ -3,13 +3,13 @@
 import os
 import re
 
-from flake8.engine import get_style_guide
+from flake8.main import application
 
 import py
 
 import pytest
 
-__version__ = '0.5'
+__version__ = '0.6'
 
 HISTKEY = "flake8/mtimes"
 
@@ -132,15 +132,22 @@ def __call__(self, path):
 
 def check_file(path, flake8ignore, maxlength):
     """Run flake8 over a single file, and return the number of failures."""
+    args = []
     if maxlength:
-        flake8_style = get_style_guide(
-            parse_argv=False, paths=['--max-line-length', maxlength])
-    else:
-        flake8_style = get_style_guide(parse_argv=False)
-    options = flake8_style.options
-
-    if options.install_hook:
-        from flake8.hooks import install_hook
-        install_hook()
-
-    return flake8_style.input_file(str(path), expected=flake8ignore)
+        args = ['--max-line-length', maxlength]
+    app = application.Application()
+    app.find_plugins()
+    app.register_plugin_options()
+    app.parse_configuration_and_cli(args)
+    app.options.ignore = flake8ignore
+    app.make_formatter()  # fix this
+    app.make_notifier()
+    app.make_guide()
+    app.make_file_checker_manager()
+    app.run_checks([str(path)])
+    app.formatter.start()
+    app.report_errors()
+    # app.report_statistics()
+    # app.report_benchmarks()
+    app.formatter.stop()
+    return app.result_count

setup.py

@@ -6,7 +6,7 @@
 
 setup(
     name='pytest-flake8',
-    version='0.5',
+    version='0.6',
     description='pytest plugin to check FLAKE8 requirements',
     long_description=open("README.rst").read(),
     classifiers=[
@@ -15,7 +15,6 @@
         "License :: OSI Approved :: BSD License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.6",
         "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.4",
@@ -35,7 +34,7 @@
         'pytest11': ['flake8 = pytest_flake8'],
     },
     install_requires=[
-        'flake8>=2.5',
+        'flake8>=3.0',
         'pytest>=2.8',
     ],
 )