Allow configuration of line length

Add the ability to configure the maximum line length, but adding a
flake8-max-line-length configuration item to the [pytest] section
of a configuration file.

CHANGELOG

@@ -1,4 +1,9 @@
+0.2
+---
+
+- Added ability to override maximum line length
+
 0.1
-----------------------------------------------
+---
 
 - initial release

README.rst

@@ -33,6 +33,17 @@ flake8.
 Configuring FLAKE8 options per project and file
 -----------------------------------------------
 
+Maximum line length can be configured for the whole project
+by adding a ``flake8-max-line-length`` option to your ``setup.cfg``
+or ``tox.ini`` file like this::
+
+    # content of setup.cfg
+    [pytest]
+    flake8-max-line-length = 99
+
+Note that the default will be what naturally comes with flake8_
+(which it turn gets its default from pep8_).
+
 You may configure flake8-checking options for your project
 by adding an ``flake8-ignore`` entry to your ``setup.cfg``
 or ``tox.ini`` file like this::

pytest_flake8.py

@@ -1,12 +1,15 @@
 """py.test plugin to test with flake8."""
 
+import os
 import re
+
+from flake8.engine import get_style_guide
+
 import py
+
 import pytest
-import os
-from flake8.engine import get_style_guide
 
-__version__ = '0.1'
+__version__ = '0.2'
 
 HISTKEY = "flake8/mtimes"
 
@@ -22,13 +25,17 @@ def pytest_addoption(parser):
         help="each line specifies a glob pattern and whitespace "
              "separated FLAKE8 errors or warnings which will be ignored, "
              "example: *.py W293")
+    parser.addini(
+        "flake8-max-line-length",
+        help="maximum line length")
 
 
 def pytest_sessionstart(session):
     """Start a new session."""
     config = session.config
     if config.option.flake8:
         config._flake8ignore = Ignorer(config.getini("flake8-ignore"))
+        config._flake8maxlen = config.getini("flake8-max-line-length")
         config._flake8mtimes = config.cache.get(HISTKEY, {})
 
 
@@ -38,7 +45,7 @@ def pytest_collect_file(path, parent):
     if config.option.flake8 and path.ext == '.py':
         flake8ignore = config._flake8ignore(path)
         if flake8ignore is not None:
-            return Flake8Item(path, parent, flake8ignore)
+            return Flake8Item(path, parent, flake8ignore, config._flake8maxlen)
 
 
 def pytest_sessionfinish(session):
@@ -49,16 +56,16 @@ def pytest_sessionfinish(session):
 
 
 class Flake8Error(Exception):
-
     """ indicates an error during flake8 checks. """
 
 
 class Flake8Item(pytest.Item, pytest.File):
 
-    def __init__(self, path, parent, flake8ignore):
+    def __init__(self, path, parent, flake8ignore, maxlength):
         super(Flake8Item, self).__init__(path, parent)
         self.add_marker("flake8")
         self.flake8ignore = flake8ignore
+        self.maxlength = maxlength
 
     def setup(self):
         flake8mtimes = self.config._flake8mtimes
@@ -70,7 +77,7 @@ def setup(self):
     def runtest(self):
         call = py.io.StdCapture.call
         found_errors, out, err = call(
-            check_file, self.fspath, self.flake8ignore)
+            check_file, self.fspath, self.flake8ignore, self.maxlength)
         if found_errors:
             raise Flake8Error(out, err)
         # update mtime only if test passed
@@ -121,9 +128,13 @@ def __call__(self, path):
         return l
 
 
-def check_file(path, flake8ignore):
+def check_file(path, flake8ignore, maxlength):
     """Run flake8 over a single file, and return the number of failures."""
-    flake8_style = get_style_guide(parse_argv=False)
+    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:

setup.py

@@ -6,16 +6,20 @@
 
 setup(
     name='pytest-flake8',
-    version='0.1',
+    version='0.2',
     description='pytest plugin to check FLAKE8 requirements',
     long_description=open("README.rst").read(),
     classifiers=[
-        "Development Status :: 3 - Alpha",
+        "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "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",
+        "Programming Language :: Python :: 3.5",
         "Topic :: Software Development",
         "Topic :: Software Development :: Quality Assurance",
         "Topic :: Software Development :: Testing",
@@ -31,8 +35,8 @@
         'pytest11': ['flake8 = pytest_flake8'],
     },
     install_requires=[
-        'flake8>=2.3',
-        'pytest>=2.4.2',
+        'flake8>=2.5',
+        'pytest>=2.8',
         'pytest-cache',
     ],
 )

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist=py27,py27-pytesttrunk,py33,py-xdist,py34
+envlist=py27,py27-pytesttrunk,py33,py-xdist,py34,py35
 
 [testenv]
 deps=pytest