Update idlsync.py to pull in dependencies required for chrome api generation.

third_party/chrome/ppapi/generators/idl_lint.py

Index: third_party/chrome/ppapi/generators/idl_lint.py
diff --git a/third_party/chrome/ppapi/generators/idl_lint.py b/third_party/chrome/ppapi/generators/idl_lint.py
new file mode 100644
index 0000000000000000000000000000000000000000..d60f7e32b8e6e39bc97de0e8edab0689c56d6e98
--- /dev/null
+++ b/third_party/chrome/ppapi/generators/idl_lint.py
@@ -0,0 +1,122 @@
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+""" Lint for IDL """
+
+import os
+import sys
+
+from idl_log import ErrOut, InfoOut, WarnOut
+from idl_node import IDLAttribute, IDLNode
+from idl_ast import IDLAst
+from idl_option import GetOption, Option, ParseOptions
+from idl_outfile import IDLOutFile
+from idl_visitor import IDLVisitor
+
+
+Option('wcomment', 'Disable warning for missing comment.')
+Option('wenum', 'Disable warning for missing enum value.')
+Option('winline', 'Disable warning for inline blocks.')
+Option('wname', 'Disable warning for inconsistent interface name.')
+Option('wnone', 'Disable all warnings.')
+Option('wparam', 'Disable warning for missing [in|out|inout] on param.')
+Option('wpass', 'Disable warning for mixed passByValue and returnByValue.')
+
+#
+# IDLLinter
+#
+# Once the AST is build, we need to resolve the namespace and version
+# information.
+#
+class IDLLinter(IDLVisitor):
+  def VisitFilter(self, node, data):
+    __pychecker__ = 'unusednames=node,data'
+    return not node.IsA('Comment', 'Copyright')
+
+  def Arrive(self, node, errors):
+    __pychecker__ = 'unusednames=node,errors'
+    warnings = 0
+    if node.IsA('Interface', 'Member', 'Struct', 'Enum', 'EnumItem', 'Typedef'):
+      comments = node.GetListOf('Comment')
+      if not comments and not node.GetProperty('wcomment'):
+        node.Warning('Expecting a comment.')
+        warnings += 1
+
+    if node.IsA('File'):
+      labels = node.GetListOf('Label')
+      interfaces = node.GetListOf('Interface')
+      if interfaces and not labels:
+        node.Warning('Expecting a label in a file containing interfaces.')
+
+    if node.IsA('Struct', 'Typedef') and not node.GetProperty('wpass'):
+      if node.GetProperty('passByValue'):
+        pbv = 'is'
+      else:
+        pbv = 'is not'
+      if node.GetProperty('returnByValue'):
+        ret = 'is'
+      else:
+        ret = 'is not'
+      if pbv != ret:
+        node.Warning('%s passByValue but %s returnByValue.' % (pbv, ret))
+        warnings += 1
+
+    if node.IsA('EnumItem'):
+      if not node.GetProperty('VALUE') and not node.GetProperty('wenum'):
+        node.Warning('Expecting value for enumeration.')
+        warnings += 1
+
+    if node.IsA('Interface'):
+      macro = node.GetProperty('macro')
+      if macro and not node.GetProperty('wname'):
+        node.Warning('Interface name inconsistent: %s' % macro)
+        warnings += 1
+
+    if node.IsA('Inline') and not node.GetProperty('winline'):
+      inline_type = node.GetProperty('NAME')
+      node.parent.Warning('Requires an inline %s block.' % inline_type)
+      warnings += 1
+
+    if node.IsA('Callspec') and not node.GetProperty('wparam'):
+      out = False
+      for arg in node.GetListOf('Param'):
+        if arg.GetProperty('out'):
+          out = True
+        if arg.GetProperty('in') and out:
+          arg.Warning('[in] parameter after [out] parameter')
+          warnings += 1
+
+    if node.IsA('Param') and not node.GetProperty('wparam'):
+      found = False;
+      for form in ['in', 'inout', 'out']:
+        if node.GetProperty(form): found = True
+      if not found:
+        node.Warning('Missing argument type: [in|out|inout]')
+        warnings += 1
+
+    return warnings
+
+  def Depart(self, node, warnings, childdata):
+    __pychecker__ = 'unusednames=node'
+    for child in childdata:
+      warnings += child
+    return warnings
+
+def Lint(ast):
+  options = ['wcomment', 'wenum', 'winline', 'wparam', 'wpass', 'wname']
+  wnone = GetOption('wnone')
+  for opt in options:
+    if wnone or GetOption(opt): ast.SetProperty(opt, True)
+
+  skipList = []
+  for filenode in ast.GetListOf('File'):
+    name = filenode.GetProperty('NAME')
+    if filenode.GetProperty('ERRORS') > 0:
+      ErrOut.Log('%s : Skipped due to errors.' % name)
+      skipList.append(filenode)
+      continue
+    warnings = IDLLinter().Visit(filenode, 0)
+    if warnings:
+      WarnOut.Log('%s warning(s) for %s\n' % (warnings, name))
+  return skipList