Use OptionParser to read arguments

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk/utils/xupdate_processor@35582 20353a03-c40f-0410-a6d1-a30d3c3de9de

xupdate_processor/__init__.py

@@ -3,9 +3,19 @@ from xuproc import applyXUpdate
 from lxml import etree
 
 def main():
-  import sys
-  doc_xml_name = sys.argv[1]
-  xu_xml_name = sys.argv[2]
+  from optparse import OptionParser
+  usage = "usage: %prog xupdate_path document_path"
+  parser = OptionParser(usage=usage)
+
+  options, args = parser.parse_args()
+
+  if len(args) != 2:
+    print parser.print_help()
+    parser.error('incorrect number of arguments')
+
+  xu_xml_name = args[0]
+  doc_xml_name = args[1]
+
   print etree.tostring(applyXUpdate(xml_xu_filename=xu_xml_name,
                                     xml_doc_filename=doc_xml_name),
-                       pretty_print=True)
\ No newline at end of file
+                       pretty_print=True)