prepare contrib directory which holds third party library

- create ryu/contrib directory
- adjust module load path for third party library and prioritize our own copy
  than system's
- teach ryu-manager ryu/contrib
- run_tests.sh: exclude contrib dir for pep8
  third party files will be included under ryu/contrib.
  Third party files aren't suitable to our pep8 check because they aren't under
  our control.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>

bin/ryu-manager

@@ -33,6 +33,12 @@ from ryu.app import wsgi
 from ryu.base.app_manager import AppManager
 from ryu.controller import controller
 
+# TODO:
+#   Right now, we have our own patched copy of ovs python bindings
+#   Once our modification is upstreamed and widely deployed,
+#   use it
+import ryu.contrib
+
 
 FLAGS = gflags.FLAGS
 gflags.DEFINE_bool('version', False, 'output version information and exit')

run_tests.sh

@@ -99,7 +99,7 @@ function run_pylint {
 function run_pep8 {
   echo "Running pep8 ..."
 
-  PEP8_EXCLUDE="vcsversion.py,*.pyc"
+  PEP8_EXCLUDE="vcsversion.py,*.pyc,contrib"
   PEP8_OPTIONS="--exclude=$PEP8_EXCLUDE --repeat --show-source"
   PEP8_INCLUDE="bin/* ryu setup*.py"
   PEP8_LOG=pep8.log

ryu/contrib/__init__.py

@@ -0,0 +1,11 @@
+# Ajust module loading path for third party library
+import os
+import sys
+
+for path in __path__:
+    if path in sys.path:
+        sys.path.remove(path)
+    path = os.path.abspath(path)
+    if path in sys.path:
+        sys.path.remove(path)
+    sys.path.insert(0, path)  # prioritize our own copy than system's