Remove tidy blacklist for 'script/dom/bindings/*'

Recently, I found myself reading through the Python codegen scripts that
live in 'components/script/dom/bindings/*' and noticed that there were
many tidy violations: unnecessary semicolons, weird spacing, unused
variables, lack of license headers, etc. Considering these files are now
living in our tree and mostly maintained directly by contributors of
Servo (as opposed to being from upstream), I feel these files should not
be excluded from our normal tidy process. This commit removes the
blacklist on these files and fixes all tidy violations.

I added these subdirectories to the blacklist because they appear to be
maintained upstream somewhere else:

* "components/script/dom/bindings/codegen/parser/*",
* "components/script/dom/bindings/codegen/ply/*",

Also, I added a '# noqa' comment which tells us to ignore the
flake8 errors for that line. I chose to ignore this (instead of fixing
it) to make the work for this commit simpler for me.

1 files changed, 23 insertions, 11 deletions

diff --git a/components/script/dom/bindings/codegen/Configuration.py b/components/script/dom/bindings/codegen/Configuration.py
index 6e4bcbed34c..436823a9329 100644
--- a/components/script/dom/bindings/codegen/Configuration.py
+++ b/components/script/dom/bindings/codegen/Configuration.py
@@ -1,11 +1,12 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this file,
-# You can obtain one at http://mozilla.org/MPL/2.0/.
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 from WebIDL import IDLInterface
 
 autogenerated_comment = "/* THIS FILE IS AUTOGENERATED - DO NOT EDIT */\n"
 
+
 class Configuration:
     """
     Represents global configuration state based on IDL parse data and
@@ -22,7 +23,7 @@ class Configuration:
         # |parseData|.
         self.descriptors = []
         self.interfaces = {}
-        self.maxProtoChainLength = 0;
+        self.maxProtoChainLength = 0
         for thing in parseData:
             # Some toplevel things are sadly types, and those have an
             # isInterface that doesn't mean the same thing as IDLObject's
@@ -44,7 +45,8 @@ class Configuration:
             if not isinstance(entry, list):
                 assert isinstance(entry, dict)
                 entry = [entry]
-            self.descriptors.extend([Descriptor(self, iface, x) for x in entry])
+            self.descriptors.extend(
+                [Descriptor(self, iface, x) for x in entry])
 
         # Mark the descriptors for which only a single nativeType implements
         # an interface.
@@ -60,10 +62,11 @@ class Configuration:
                           c.isCallback() and not c.isInterface()]
 
         # Keep the descriptor list sorted for determinism.
-        self.descriptors.sort(lambda x,y: cmp(x.name, y.name))
+        self.descriptors.sort(lambda x, y: cmp(x.name, y.name))
 
     def getInterface(self, ifname):
         return self.interfaces[ifname]
+
     def getDescriptors(self, **filters):
         """Gets the descriptors that match the given filters."""
         curr = self.descriptors
@@ -80,6 +83,7 @@ class Configuration:
                 getter = lambda x: getattr(x, key)
             curr = filter(lambda x: getter(x) == val, curr)
         return curr
+
     def getEnums(self, webIDLFile):
         return filter(lambda e: e.filename() == webIDLFile, self.enums)
 
@@ -93,6 +97,7 @@ class Configuration:
 
     def getDictionaries(self, webIDLFile=""):
         return self._filterForFile(self.dictionaries, webIDLFile=webIDLFile)
+
     def getCallbacks(self, webIDLFile=""):
         return self._filterForFile(self.callbacks, webIDLFile=webIDLFile)
 
@@ -104,20 +109,23 @@ class Configuration:
         descriptors = self.getDescriptors(interface=iface)
 
         # We should have exactly one result.
-        if len(descriptors) is not 1:
+        if len(descriptors) != 1:
             raise NoSuchDescriptorError("For " + interfaceName + " found " +
-                                        str(len(matches)) + " matches");
+                                        str(len(descriptors)) + " matches")
         return descriptors[0]
+
     def getDescriptorProvider(self):
         """
         Gets a descriptor provider that can provide descriptors as needed.
         """
         return DescriptorProvider(self)
 
+
 class NoSuchDescriptorError(TypeError):
     def __init__(self, str):
         TypeError.__init__(self, str)
 
+
 class DescriptorProvider:
     """
     A way of getting descriptors for interface names
@@ -132,6 +140,7 @@ class DescriptorProvider:
         """
         return self.config.getDescriptor(interfaceName)
 
+
 class Descriptor(DescriptorProvider):
     """
     Represents a single descriptor for an interface. See Bindings.conf.
@@ -148,7 +157,7 @@ class Descriptor(DescriptorProvider):
         if self.interface.isCallback():
             self.needsRooting = False
             ty = "%sBinding::%s" % (ifaceName, ifaceName)
-            self.returnType = "Rc<%s>"% ty
+            self.returnType = "Rc<%s>" % ty
             self.argumentType = "???"
             self.memberType = "???"
             self.nativeType = ty
@@ -230,7 +239,7 @@ class Descriptor(DescriptorProvider):
         # self.extendedAttributes is a dict of dicts, keyed on
         # all/getterOnly/setterOnly and then on member name. Values are an
         # array of extended attributes.
-        self.extendedAttributes = { 'all': {}, 'getterOnly': {}, 'setterOnly': {} }
+        self.extendedAttributes = {'all': {}, 'getterOnly': {}, 'setterOnly': {}}
 
         def addExtendedAttribute(attribute, config):
             def add(key, members, attribute):
@@ -334,6 +343,7 @@ def getTypesFromDescriptor(descriptor):
     types.extend(a.type for a in members if a.isAttr())
     return types
 
+
 def getFlatTypes(types):
     retval = set()
     for type in types:
@@ -344,6 +354,7 @@ def getFlatTypes(types):
             retval.add(type)
     return retval
 
+
 def getTypesFromDictionary(dictionary):
     """
     Get all member types for this dictionary
@@ -355,12 +366,13 @@ def getTypesFromDictionary(dictionary):
         curDict = curDict.parent
     return types
 
+
 def getTypesFromCallback(callback):
     """
     Get the types this callback depends on: its return type and the
     types of its arguments.
     """
     sig = callback.signatures()[0]
-    types = [sig[0]] # Return type
-    types.extend(arg.type for arg in sig[1]) # Arguments
+    types = [sig[0]]  # Return type
+    types.extend(arg.type for arg in sig[1])  # Arguments
     return types