Fix condition where no author would be retrieved (revert on a branch for

something that was on trunk, svn info only knows about it when it's ref by trunk
url).

Also added an author override, useful for webkit merges or double reverts

Review URL: http://codereview.chromium.org/551137

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@37024 0039d316-1c4b-4281-b951-d872f2087c98

drover.py

@@ -477,7 +477,12 @@ def main(options, args):
     revertExportRevision(url, revision)
 
   # Check the base url so we actually find the author who made the change
-  author = getAuthor(url, revision)
+  if options.auditor:
+    author = options.auditor
+  else:
+    author = getAuthor(url, revision)
+    if not author:
+      author = getAuthor(TRUNK_URL, revision)
 
   filename = str(revision)+".txt"
   out = open(filename,"w")
@@ -532,6 +537,8 @@ if __name__ == "__main__":
                            help='Revision to revert')
   option_parser.add_option('-w', '--workdir',
                            help='subdir to use for the revert')
+  option_parser.add_option('-a', '--auditor',
+                           help='overrides the author for reviewer')                           
   option_parser.add_option('', '--revertbot', action='store_true',
                            default=False)
   option_parser.add_option('', '--revertbot-commit', action='store_true',
@@ -547,4 +554,4 @@ if __name__ == "__main__":
     option_parser.error("--merge requires a --branch")
     sys.exit(1)
 
-  sys.exit(main(options, args))
+  sys.exit(main(options, args))