diff -r e7dbccabc982 -r 10f8f20e0137 mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Oct 11 03:49:04 2017 +0200
+++ b/mercurial/configitems.py	Wed Oct 11 03:49:21 2017 +0200
@@ -371,6 +371,9 @@
 coreconfigitem('logtoprocess', 'commandexception',
     default=None,
 )
+coreconfigitem('logtoprocess', 'commandfinish',
+    default=None,
+)
 coreconfigitem('merge', 'checkunknown',
     default='abort',
 )