Merge branch 'master' into 'master'

Fix issue #39

Only raise SystemExit if there is an error.

See merge request !23

CONTRIBUTORS.txt

@@ -19,4 +19,5 @@ Contributors (by order of appearance) :
 - Marc Labbé
 - Bruno Miguel Custódio
 - Florent Xicluna
-- Austin Morton
+- Austin Morton
+- Michael McNeil Forbes

flake8/main.py

@@ -134,4 +134,5 @@ class Flake8Command(setuptools.Command):
         # Run the checkers
         report = flake8_style.check_files()
         exit_code = print_report(report, flake8_style)
-        raise SystemExit(exit_code > 0)
+        if exit_code > 0:
+            raise SystemExit(exit_code > 0)

flake8/tests/test_main.py

@@ -0,0 +1,18 @@
+from __future__ import with_statement
+
+import unittest
+
+import setuptools
+from flake8 import main
+
+
+class TestMain(unittest.TestCase):
+    def test_issue_39_regression(self):
+        distribution = setuptools.Distribution()
+        cmd = main.Flake8Command(distribution)
+        cmd.options_dict = {}
+        cmd.run()
+
+
+if __name__ == '__main__':
+    unittest.main()