Improve error messages in extensions/docs/build.py .

chrome/common/extensions/docs/build/build.py

Index: chrome/common/extensions/docs/build/build.py
===================================================================
--- chrome/common/extensions/docs/build/build.py	(revision 30409)
+++ chrome/common/extensions/docs/build/build.py	(working copy)
@@ -130,10 +130,20 @@
                    "To specify a path to test_shell use --test-shell-path")
 
 def GetAPIModuleNames():
-  contents = open(_extension_api_json, 'r').read();
-  extension_api = json.loads(contents, encoding="ASCII")
-  return set( module['namespace'].encode() for module in extension_api)
+  try:
+    contents = open(_extension_api_json, 'r').read()
+  except IOError, msg:
+    raise Exception("Failed to read the file that defines the extensions API.  "
+                    "The specific error was: %s." % msg)
 
+  try:
+    extension_api = json.loads(contents, encoding="ASCII")
+  except ValueError, msg:
+    raise Exception("File %s has a syntax error: %s" %
+                    (_extension_api_json, msg))
+
+  return set(module['namespace'].encode() for module in extension_api)
+
 def GetStaticFileNames():
   static_files = os.listdir(_static_dir)
   return set(os.path.splitext(file)[0]
Property changes on: chrome/common/extensions/docs/build/build.py
___________________________________________________________________
Name: svn:eol-style
   + LF