Fix project config file discovery

Flake8 3.0 was stopping once it found the current directory but the
historical behaviour (that we didn't intend to break) searched past
that (towards root) until it found one of the project/local config
file names that could be read.

Closes #181

5 files changed, 22 insertions, 27 deletions

diff --git a/docs/source/release-notes/3.0.1.rst b/docs/source/release-notes/3.0.1.rst
index 0092dc8..20f6783 100644
--- a/docs/source/release-notes/3.0.1.rst
+++ b/docs/source/release-notes/3.0.1.rst
@@ -1,5 +1,5 @@
-3.0.1 -- 2016-07-25
--------------------
+3.0.1 -- 2016-07-25 (unreleased)
+--------------------------------
 
 - Fix regression in handling of ``# noqa`` for multiline strings.
   (See also `GitLab#177`_)
diff --git a/docs/source/release-notes/3.0.2.rst b/docs/source/release-notes/3.0.2.rst
new file mode 100644
index 0000000..8605ce9
--- /dev/null
+++ b/docs/source/release-notes/3.0.2.rst
@@ -0,0 +1,9 @@
+3.0.2 -- 2016-07-26
+-------------------
+
+- Fix local config file discovery.  (See also `GitLab#181`_)
+
+
+.. links
+.. _GitLab#181:
+    https://gitlab.com/pycqa/flake8/issues/181
diff --git a/docs/source/release-notes/index.rst b/docs/source/release-notes/index.rst
index 8056b76..440079b 100644
--- a/docs/source/release-notes/index.rst
+++ b/docs/source/release-notes/index.rst
@@ -6,6 +6,7 @@ All of the release notes that have been recorded for Flake8 are organized here
 with the newest releases first.
 
 .. toctree::
+    3.0.2
     3.0.1
     3.0.0
     2.6.2
diff --git a/src/flake8/options/config.py b/src/flake8/options/config.py
index ec5023b..d1408fe 100644
--- a/src/flake8/options/config.py
+++ b/src/flake8/options/config.py
@@ -43,8 +43,6 @@ class ConfigFileFinder(object):
         # List of filenames to find in the local/project directory
         self.project_filenames = ('setup.cfg', 'tox.ini', self.program_config)
 
-        self.local_directory = os.path.abspath(os.curdir)
-
         if not args:
             args = ['.']
         self.parent = self.tail = os.path.abspath(os.path.commonprefix(args))
@@ -72,14 +70,14 @@ class ConfigFileFinder(object):
         """Find and generate all local config files."""
         tail = self.tail
         parent = self.parent
-        local_dir = self.local_directory
-        while tail:
+        found_config_files = False
+        while tail and not found_config_files:
             for project_filename in self.project_filenames:
                 filename = os.path.abspath(os.path.join(parent,
                                                         project_filename))
-                yield filename
-            if parent == local_dir:
-                break
+                if os.path.exists(filename):
+                    yield filename
+                    found_config_files = True
             (parent, tail) = os.path.split(parent)
 
     def local_config_files(self):
@@ -99,7 +97,6 @@ class ConfigFileFinder(object):
         return [
             filename
             for filename in self.generate_possible_local_files()
-            if os.path.exists(filename)
         ] + [f for f in self.extra_config_files if exists(f)]
 
     def local_configs(self):
diff --git a/tests/unit/test_config_file_finder.py b/tests/unit/test_config_file_finder.py
index 2e1a1e5..3f321da 100644
--- a/tests/unit/test_config_file_finder.py
+++ b/tests/unit/test_config_file_finder.py
@@ -43,27 +43,15 @@ def test_cli_config():
     # No arguments, common prefix of abspath('.')
     ([],
         [os.path.abspath('setup.cfg'),
-            os.path.abspath('tox.ini'),
-            os.path.abspath('.flake8')]),
+            os.path.abspath('tox.ini')]),
     # Common prefix of "flake8/"
     (['flake8/options', 'flake8/'],
-        [os.path.abspath('flake8/setup.cfg'),
-            os.path.abspath('flake8/tox.ini'),
-            os.path.abspath('flake8/.flake8'),
-            os.path.abspath('setup.cfg'),
-            os.path.abspath('tox.ini'),
-            os.path.abspath('.flake8')]),
+        [os.path.abspath('setup.cfg'),
+            os.path.abspath('tox.ini')]),
     # Common prefix of "flake8/options"
     (['flake8/options', 'flake8/options/sub'],
-        [os.path.abspath('flake8/options/setup.cfg'),
-            os.path.abspath('flake8/options/tox.ini'),
-            os.path.abspath('flake8/options/.flake8'),
-            os.path.abspath('flake8/setup.cfg'),
-            os.path.abspath('flake8/tox.ini'),
-            os.path.abspath('flake8/.flake8'),
-            os.path.abspath('setup.cfg'),
-            os.path.abspath('tox.ini'),
-            os.path.abspath('.flake8')]),
+        [os.path.abspath('setup.cfg'),
+            os.path.abspath('tox.ini')]),
 ])
 def test_generate_possible_local_files(args, expected):
     """Verify generation of all possible config paths."""