diff -r 5ac0e6f19eb4 -r 1864efbe90d9 mercurial/commands.py
--- a/mercurial/commands.py	Sun Dec 29 20:51:44 2019 -0500
+++ b/mercurial/commands.py	Sun Dec 29 21:06:34 2019 -0500
@@ -2223,6 +2223,8 @@
     for t, f in rcutil.rccomponents():
         if t == b'path':
             ui.debug(b'read config from: %s\n' % f)
+        elif t == b'resource':
+            ui.debug(b'read config from: resource:%s.%s\n' % (f[0], f[1]))
         elif t == b'items':
             # Don't print anything for 'items'.
             pass