Add globbing to codestyle_exclude (#43)

Sometimes a specific directory might include files that follow
different style conventions (e.g., code generated using grpc) - before
this change, any such files would need to be excluded individually.

This commit makes specifying excluded files more flexible by allowing
globbing in file paths.

codestyle_exclude will now accept paths like `embedded_lib/**/*.py`,
which will match any file in any subdirectory of `embedded_lib` that
has a `.py` extension.

Close #42

pytest_codestyle.py

@@ -20,14 +20,15 @@ def pytest_addoption(parser):
                       ignored=pycodestyle.DEFAULT_IGNORE.replace(',', ' ')))
     parser.addini('codestyle_show_source', type="bool", default=True,
                   help='show source code for each error (default: True)')
-    parser.addini('codestyle_exclude', type="pathlist",
+    parser.addini('codestyle_exclude', type="args",
                   help='source files to be excluded from codestyle')
 
 
 def pytest_collect_file(parent, path):
     config = parent.config
-    if config.getoption('codestyle') and path.ext == '.py' and path not in config.getini('codestyle_exclude'):
-        return Item(path, parent)
+    if config.getoption('codestyle') and path.ext == '.py':
+        if not any(path.fnmatch(pattern) for pattern in config.getini('codestyle_exclude')):
+            return Item(path, parent)
 
 
 class Item(pytest.Item, pytest.File):

test_pytest_codestyle.py

@@ -46,9 +46,9 @@ def test_ini(request):
             ignore = ['d', 'e', 'f']
             assert config.getini('codestyle_ignore') == ignore
             assert config.getini('codestyle_show_source') is True
-            exclude = ['{dirname}/{base}/exclude.py', '{dirname}/{base}/path/to/another/exclude.py']
+            exclude = ['exclude.py', 'path/to/another/exclude.py']
             assert config.getini('codestyle_exclude') == exclude
-    """.format(dirname=testdir.tmpdir.dirname, base=testdir.tmpdir.basename))
+    """)
     p = p.write(p.read() + "\n")
     result = testdir.runpytest('--codestyle')
     result.assert_outcomes(passed=2)
@@ -65,13 +65,14 @@ def test_pytest_collect_file(testdir):
 def test_pytest_collect_file_with_exclude(testdir):
     testdir.makeini("""
         [pytest]
-        codestyle_exclude = a.py path/to/c.py
+        codestyle_exclude = a.py path/**/?.py
     """)
     testdir.tmpdir.ensure('a.py')
     testdir.tmpdir.ensure('b.py')
     testdir.tmpdir.ensure('path/to/c.py')
+    testdir.tmpdir.ensure('path/to/hoge/foo.py')
     result = testdir.runpytest('--codestyle')
-    result.assert_outcomes(passed=1)
+    result.assert_outcomes(passed=2)
 
 
 def test_cache(testdir):