Move noop flag to provider base-class

Moving this flag makes it easier to implement additional functions
which work differently depending on noop mode being set, vs passing
it into every function like apply()

Change-Id: I796792aece3e40322523e910a3b87f7ab9a451dd

os_net_config/__init__.py

@@ -24,6 +24,9 @@ class NotImplemented(Exception):
 class NetConfig(object):
     """Configure network interfaces using the ifcfg format."""
 
+    def __init__(self, noop=False):
+        self.noop = noop
+
     def add_object(self, obj):
         """Convenience method to add any type of object to the network config.
            See objects.py.
@@ -71,10 +74,9 @@ class NetConfig(object):
         """
         raise NotImplemented("add_bond is not implemented.")
 
-    def apply(self, noop=False, cleanup=False):
+    def apply(self, cleanup=False):
         """Apply the network configuration.
 
-        :param noop: A boolean which indicates whether this is a no-op.
         :param cleanup: A boolean which indicates whether any undefined
             (existing but not present in the object model) interfaces
             should be disabled and deleted.

os_net_config/cli.py

@@ -112,19 +112,19 @@ def main(argv=sys.argv):
     provider = None
     if opts.provider:
         if opts.provider == 'ifcfg':
-            provider = impl_ifcfg.IfcfgNetConfig()
+            provider = impl_ifcfg.IfcfgNetConfig(noop=opts.noop)
         elif opts.provider == 'eni':
-            provider = impl_eni.ENINetConfig()
+            provider = impl_eni.ENINetConfig(noop=opts.noop)
         elif opts.provider == 'iproute':
-            provider = impl_iproute.IPRouteNetConfig()
+            provider = impl_iproute.IPRouteNetConfig(noop=opts.noop)
         else:
             logger.error('Invalid provider specified.')
             return 1
     else:
         if os.path.exists('/etc/sysconfig/network-scripts/'):
-            provider = impl_ifcfg.IfcfgNetConfig()
+            provider = impl_ifcfg.IfcfgNetConfig(noop=opts.noop)
         elif os.path.exists('/etc/network/'):
-            provider = impl_eni.ENINetConfig()
+            provider = impl_eni.ENINetConfig(noop=opts.noop)
         else:
             logger.error('Unable to set provider for this operating system.')
             return 1
@@ -161,7 +161,7 @@ def main(argv=sys.argv):
         iface_json.update({'persist_mapping': persist_mapping})
         obj = objects.object_from_json(iface_json)
         provider.add_object(obj)
-    files_changed = provider.apply(noop=opts.noop, cleanup=opts.cleanup)
+    files_changed = provider.apply(cleanup=opts.cleanup)
     if opts.noop:
         for location, data in files_changed.iteritems():
             print "File: %s\n" % location

os_net_config/impl_eni.py

@@ -39,7 +39,8 @@ class ENINetConfig(os_net_config.NetConfig):
        /etc/network/interfaces format.
     """
 
-    def __init__(self):
+    def __init__(self, noop=False):
+        super(ENINetConfig, self).__init__(noop)
         self.interfaces = {}
         self.routes = {}
         self.bridges = {}
@@ -188,13 +189,13 @@ class ENINetConfig(os_net_config.NetConfig):
         self.routes[interface_name] = data
         logger.debug('route data: %s' % self.routes[interface_name])
 
-    def apply(self, noop=False, cleanup=False):
+    def apply(self, cleanup=False):
         """Apply the network configuration.
 
-        :param noop: A boolean which indicates whether this is a no-op.
         :returns: a dict of the format: filename/data which contains info
             for each file that was changed (or would be changed if in --noop
             mode).
+        Note the noop mode is set via the constructor noop boolean
         """
         new_config = ""
 
@@ -211,7 +212,7 @@ class ENINetConfig(os_net_config.NetConfig):
             new_config += iface_data
 
         if (utils.diff(_network_config_path(), new_config)):
-            if noop:
+            if self.noop:
                 return {"/etc/network/interfaces": new_config}
             for interface in self.interfaces.keys():
                 logger.info('running ifdown on interface: %s' % interface)

os_net_config/impl_ifcfg.py

@@ -49,7 +49,8 @@ def cleanup_pattern():
 class IfcfgNetConfig(os_net_config.NetConfig):
     """Configure network interfaces using the ifcfg format."""
 
-    def __init__(self):
+    def __init__(self, noop=False):
+        super(IfcfgNetConfig, self).__init__(noop)
         self.interface_data = {}
         self.route_data = {}
         self.bridge_data = {}
@@ -211,16 +212,16 @@ class IfcfgNetConfig(os_net_config.NetConfig):
         if bond.routes:
             self._add_routes(bond.name, bond.routes)
 
-    def apply(self, noop=False, cleanup=False):
+    def apply(self, cleanup=False):
         """Apply the network configuration.
 
-        :param noop: A boolean which indicates whether this is a no-op.
         :param cleanup: A boolean which indicates whether any undefined
             (existing but not present in the object model) interface
             should be disabled and deleted.
         :returns: a dict of the format: filename/data which contains info
             for each file that was changed (or would be changed if in --noop
             mode).
+        Note the noop mode is set via the constructor noop boolean
         """
         logger.info('applying network configs...')
         restart_interfaces = []
@@ -257,7 +258,7 @@ class IfcfgNetConfig(os_net_config.NetConfig):
                 update_files[bridge_route_path] = route_data
                 logger.info('No changes required for bridge: %s' % bridge_name)
 
-        if noop:
+        if self.noop:
             return update_files
 
         if cleanup: