check-code: prohibit `if False` antipattern
Differential Revision: https://phab.mercurial-scm.org/D20
--- a/contrib/check-code.py Fri Jul 07 15:08:23 2017 -0400
+++ b/contrib/check-code.py Fri Jul 07 15:11:11 2017 -0400
@@ -301,6 +301,7 @@
"comparison with singleton, use 'is' or 'is not' instead"),
(r'^\s*(while|if) [01]:',
"use True/False for constant Boolean expression"),
+ (r'^\s*if False(:| +and)', 'Remove code instead of using `if False`'),
(r'(?:(?<!def)\s+|\()hasattr\(',
'hasattr(foo, bar) is broken on py2, use util.safehasattr(foo, bar) '
'instead', r'#.*hasattr-py3-only'),