releasenotes: extract helper for checking for incompatible arguments

This patch extracts a new check_incompatible_arguments() function
similar to check_at_most_one_arg(). The difference is that the new
function is for checking for arguments that are disallowed together
with some other argument but not mutually exclusive among themselves.

Differential Revision: https://phab.mercurial-scm.org/D7639

hgext/releasenotes.py

@@ -20,6 +20,7 b' import re'
 from mercurial.i18n import _
 from mercurial.pycompat import open
 from mercurial import (
+    cmdutil,
     config,
     error,
     minirst,
@@ -653,14 +654,9 b' def releasenotes(ui, repo, file_=None, *'
     opts = pycompat.byteskwargs(opts)
     sections = releasenotessections(ui, repo)
 
-    listflag = opts.get(b'list')
+    cmdutil.check_incompatible_arguments(opts, b'list', b'rev', b'check')
 
-    if listflag and opts.get(b'rev'):
-        raise error.Abort(_(b'cannot use both \'--list\' and \'--rev\''))
-    if listflag and opts.get(b'check'):
-        raise error.Abort(_(b'cannot use both \'--list\' and \'--check\''))
-
-    if listflag:
+    if opts.get(b'list'):
         return _getadmonitionlist(ui, sections)
 
     rev = opts.get(b'rev')

mercurial/cmdutil.py

@@ -272,6 +272,16 b' def check_at_most_one_arg(opts, *args):'
             previous = x
 
 
+def check_incompatible_arguments(opts, first, *others):
+    """abort if the first argument is given along with any of the others
+
+    Unlike check_at_most_one_arg(), `others` are not mutually exclusive
+    among themselves.
+    """
+    for other in others:
+        check_at_most_one_arg(opts, first, other)
+
+
 def resolvecommitoptions(ui, opts):
     """modify commit options dict to handle related options