--- trac-post-commit-hook.bak	2012-02-28 14:50:46.000000000 +0900
+++ trac-post-commit-hook	2012-02-28 15:03:51.000000000 +0900
@@ -111,6 +111,7 @@
 from trac.util.text import to_unicode
 from trac.util.datefmt import utc
 from trac.versioncontrol.api import NoSuchChangeset
+from trac.ticket import Milestone
 
 ticket_prefix = '(?:#|(?:ticket|issue|bug)[: ]?)'
 ticket_reference = ticket_prefix + '[0-9]+'
@@ -136,7 +137,9 @@
                        're':         '_cmdRefs',
                        'references': '_cmdRefs',
                        'refs':       '_cmdRefs',
-                       'see':        '_cmdRefs'}
+                       'see':        '_cmdRefs',
+                       'milestone':     '_cmdMilestoneClose',
+                       }
 
     def __init__(self, project=options.project, author=options.user,
                  rev=options.rev, url=options.url):
@@ -170,6 +173,7 @@
                 db = self.env.get_db_cnx()
                 
                 ticket = Ticket(self.env, int(tkt_id), db)
+                self.milestone = Milestone(self.env, ticket['milestone'], db)
                 for cmd in cmds:
                     cmd(ticket)
 
@@ -181,6 +185,7 @@
                         cnum += 1
                 
                 ticket.save_changes(self.author, self.msg, self.now, db, cnum+1)
+                self.milestone.update()
                 db.commit()
                 
                 tn = TicketNotifyEmail(self.env)
@@ -199,6 +204,9 @@
     def _cmdRefs(self, ticket):
         pass
 
+    def _cmdMilestoneClose(self, ticket):
+       self.milestone.completed = self.now
+
 
 if __name__ == "__main__":
     if len(sys.argv) < 5: