# HG changeset patch
# User Simon Farnsworth <simonfar@fb.com>
# Date 2017-03-06 11:25:44
# Node ID 3a03264de3ebc9c0048bbddb45869684b396de9e
# Parent  71a6723c002946b70866228d102f485772c61cb1

dispatch: set a blockedtag when running an external alias

diff --git a/mercurial/dispatch.py b/mercurial/dispatch.py
--- a/mercurial/dispatch.py
+++ b/mercurial/dispatch.py
@@ -354,7 +354,8 @@ class cmdalias(object):
                         return ''
                 cmd = re.sub(r'\$(\d+|\$)', _checkvar, self.definition[1:])
                 cmd = aliasinterpolate(self.name, args, cmd)
-                return ui.system(cmd, environ=env)
+                return ui.system(cmd, environ=env,
+                                 blockedtag='alias_%s' % self.name)
             self.fn = fn
             return