convert extension: Add support for username mapping Allows mapping usernames to new ones during conversion process. - Use -A option for first import - Then at the end of the conversion process and if the destination repo supports authorfile attribute, author map content is copied to the file pointed by the authorfile call. - On incremental conversions w/o any -A option specified, the destination authorfile, if any, gets read automatically. EG: This allows mapping unix system usernames used in CVS accounts to a more typical "Firstname Lastname <address@server.org>" pair.

--- a/hgext/convert/common.py
+++ b/hgext/convert/common.py
@@ -62,6 +62,12 @@ class converter_sink(object):
         mapping equivalent revision identifiers for each system."""
         raise NotImplementedError()
 
+    def authorfile(self):
+        """Path to a file that will contain lines
+        srcauthor=dstauthor
+        mapping equivalent authors identifiers for each system."""
+        raise NotImplementedError()
+
     def putfile(self, f, e, data):
         """Put file for next putcommit().
         f: path to file