diff -r ff1ff2aae132 -r 66048f6b5d0d mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Sat Sep 07 13:44:29 2019 -0400
+++ b/mercurial/cmdutil.py	Sat Sep 07 23:20:11 2019 -0400
@@ -100,6 +100,13 @@
      _('record the specified user as committer'), _('USER')),
 ]
 
+commitopts3 = [
+    (b'D', b'current-date', None,
+     _(b'record the current date as commit date')),
+    (b'U', b'current-user', None,
+     _(b'record the current user as committer')),
+]
+
 formatteropts = [
     ('T', 'template', '',
      _('display with template'), _('TEMPLATE')),
@@ -175,6 +182,15 @@
 # editor text
 _linebelow = "^HG: ------------------------ >8 ------------------------$"
 
+def resolvecommitoptions(ui, opts):
+    """modify commit options dict to handle related options
+    """
+    # N.B. this is extremely similar to setupheaderopts() in mq.py
+    if not opts.get(b'date') and opts.get(b'current_date'):
+        opts[b'date'] = b'%d %d' % dateutil.makedate()
+    if not opts.get(b'user') and opts.get(b'current_user'):
+        opts[b'user'] = ui.username()
+
 def ishunk(x):
     hunkclasses = (crecordmod.uihunk, patch.recordhunk)
     return isinstance(x, hunkclasses)