diff options
| -rw-r--r-- | synapse/push/push_rule_evaluator.py | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py index 172c27c137..65f9a63fd8 100644 --- a/synapse/push/push_rule_evaluator.py +++ b/synapse/push/push_rule_evaluator.py @@ -183,7 +183,7 @@ def _glob_to_re(glob, word_boundary): r, ) if word_boundary: - r = r"\b%s\b" % (r,) + r = _re_word_boundary(r) return re.compile(r, flags=re.IGNORECASE) else: @@ -192,7 +192,7 @@ def _glob_to_re(glob, word_boundary): return re.compile(r, flags=re.IGNORECASE) elif word_boundary: r = re.escape(glob) - r = r"\b%s\b" % (r,) + r = _re_word_boundary(r) return re.compile(r, flags=re.IGNORECASE) else: @@ -200,6 +200,18 @@ def _glob_to_re(glob, word_boundary): return re.compile(r, flags=re.IGNORECASE) +def _re_word_boundary(r): + """ + Adds word boundary characters to the start and end of an + expression to require that the match occur as a whole word, + but do so respecting the fact that strings starting or ending + with non-word characters will change word boundaries. + """ + # we can't use \b as it chokes on unicode. however \W seems to be okay + # as shorthand for [^0-9A-Za-z_]. + return r"(^|\W)%s(\W|$)" % (r,) + + def _flatten_dict(d, prefix=[], result=None): if result is None: result = {} |