--- a/kallithea/lib/helpers.py	Mon Nov 09 16:48:34 2020 +0100
+++ b/kallithea/lib/helpers.py	Mon Nov 09 16:42:43 2020 +0100
@@ -38,17 +38,17 @@
 from kallithea.lib.diffs import BIN_FILENODE, CHMOD_FILENODE, DEL_FILENODE, MOD_FILENODE, NEW_FILENODE, RENAMED_FILENODE
 from kallithea.lib.markup_renderer import url_re
 from kallithea.lib.pygmentsutils import get_custom_lexer
-from kallithea.lib.utils2 import (MENTIONS_REGEX, AttributeDict, age, asbool, credentials_filter, fmt_date, link_to_ref, safe_bytes, safe_int, safe_str,
-                                  shorter, time_to_datetime)
+from kallithea.lib.utils2 import (AttributeDict, age, asbool, credentials_filter, fmt_date, link_to_ref, safe_bytes, safe_int, safe_str, shorter,
+                                  time_to_datetime)
 from kallithea.lib.vcs.backends.base import BaseChangeset, EmptyChangeset
 from kallithea.lib.vcs.exceptions import ChangesetDoesNotExistError
 #==============================================================================
 # SCM FILTERS available via h.
 #==============================================================================
 from kallithea.lib.vcs.utils import author_email, author_name
-from kallithea.lib.webutils import (HTML, Option, canonical_url, checkbox, chop_at, end_form, escape, form, format_byte_size, hidden, html_escape, js, jshtml,
-                                    link_to, literal, password, pop_flash_messages, radio, reset, safeid, select, session_csrf_secret_name,
-                                    session_csrf_secret_token, submit, text, textarea, truncate, url, wrap_paragraphs)
+from kallithea.lib.webutils import (HTML, MENTIONS_REGEX, Option, canonical_url, checkbox, chop_at, end_form, escape, form, format_byte_size, hidden,
+                                    html_escape, js, jshtml, link_to, literal, password, pop_flash_messages, radio, reset, safeid, select,
+                                    session_csrf_secret_name, session_csrf_secret_token, submit, text, textarea, truncate, url, wrap_paragraphs)
 from kallithea.model import db
 from kallithea.model.changeset_status import ChangesetStatusModel
 

--- a/kallithea/lib/markup_renderer.py	Mon Nov 09 16:48:34 2020 +0100
+++ b/kallithea/lib/markup_renderer.py	Mon Nov 09 16:42:43 2020 +0100
@@ -36,7 +36,7 @@
 from docutils.core import publish_parts
 from docutils.parsers.rst import directives
 
-from kallithea.lib.utils2 import MENTIONS_REGEX
+from kallithea.lib import webutils
 
 
 log = logging.getLogger(__name__)
@@ -242,5 +242,5 @@
         def wrapp(match_obj):
             uname = match_obj.groups()[0]
             return r'\ **@%(uname)s**\ ' % {'uname': uname}
-        mention_hl = MENTIONS_REGEX.sub(wrapp, source).strip()
+        mention_hl = webutils.MENTIONS_REGEX.sub(wrapp, source).strip()
         return cls.rst(mention_hl)

--- a/kallithea/lib/utils.py	Mon Nov 09 16:48:34 2020 +0100
+++ b/kallithea/lib/utils.py	Mon Nov 09 16:42:43 2020 +0100
@@ -36,8 +36,9 @@
 import mercurial.ui
 
 import kallithea.lib.conf
+from kallithea.lib import webutils
 from kallithea.lib.exceptions import InvalidCloneUriException
-from kallithea.lib.utils2 import ascii_bytes, aslist, extract_mentioned_usernames, safe_bytes, safe_str
+from kallithea.lib.utils2 import ascii_bytes, aslist, safe_bytes, safe_str
 from kallithea.lib.vcs.backends.git.repository import GitRepository
 from kallithea.lib.vcs.backends.hg.repository import MercurialRepository
 from kallithea.lib.vcs.conf import settings
@@ -494,7 +495,7 @@
 def extract_mentioned_users(text):
     """ Returns set of actual database Users @mentioned in given text. """
     result = set()
-    for name in extract_mentioned_usernames(text):
+    for name in webutils.extract_mentioned_usernames(text):
         user = db.User.get_by_username(name, case_insensitive=True)
         if user is not None and not user.is_default_user:
             result.add(user)

--- a/kallithea/lib/utils2.py	Mon Nov 09 16:48:34 2020 +0100
+++ b/kallithea/lib/utils2.py	Mon Nov 09 16:42:43 2020 +0100
@@ -422,22 +422,6 @@
         return datetime.datetime.fromtimestamp(tm)
 
 
-# Must match regexp in kallithea/public/js/base.js MentionsAutoComplete()
-# Check char before @ - it must not look like we are in an email addresses.
-# Matching is greedy so we don't have to look beyond the end.
-MENTIONS_REGEX = re.compile(r'(?:^|(?<=[^a-zA-Z0-9]))@([a-zA-Z0-9][-_.a-zA-Z0-9]*[a-zA-Z0-9])')
-
-
-def extract_mentioned_usernames(text):
-    r"""
-    Returns list of (possible) usernames @mentioned in given text.
-
-    >>> extract_mentioned_usernames('@1-2.a_X,@1234 not@not @ddd@not @n @ee @ff @gg, @gg;@hh @n\n@zz,')
-    ['1-2.a_X', '1234', 'ddd', 'ee', 'ff', 'gg', 'gg', 'hh', 'zz']
-    """
-    return MENTIONS_REGEX.findall(text)
-
-
 class AttributeDict(dict):
     def __getattr__(self, attr):
         return self.get(attr, None)

--- a/kallithea/lib/webutils.py	Mon Nov 09 16:48:34 2020 +0100
+++ b/kallithea/lib/webutils.py	Mon Nov 09 16:42:43 2020 +0100
@@ -23,6 +23,7 @@
 import json
 import logging
 import random
+import re
 
 from tg import request, session
 from webhelpers2.html import HTML, escape, literal
@@ -306,3 +307,19 @@
     better to escape too much than too little.
     """
     return js(escape(val))
+
+
+# Must match regexp in kallithea/public/js/base.js MentionsAutoComplete()
+# Check char before @ - it must not look like we are in an email addresses.
+# Matching is greedy so we don't have to look beyond the end.
+MENTIONS_REGEX = re.compile(r'(?:^|(?<=[^a-zA-Z0-9]))@([a-zA-Z0-9][-_.a-zA-Z0-9]*[a-zA-Z0-9])')
+
+
+def extract_mentioned_usernames(text):
+    r"""
+    Returns list of (possible) usernames @mentioned in given text.
+
+    >>> extract_mentioned_usernames('@1-2.a_X,@1234 not@not @ddd@not @n @ee @ff @gg, @gg;@hh @n\n@zz,')
+    ['1-2.a_X', '1234', 'ddd', 'ee', 'ff', 'gg', 'gg', 'hh', 'zz']
+    """
+    return MENTIONS_REGEX.findall(text)

--- a/kallithea/tests/other/test_libs.py	Mon Nov 09 16:48:34 2020 +0100
+++ b/kallithea/tests/other/test_libs.py	Mon Nov 09 16:42:43 2020 +0100
@@ -111,7 +111,7 @@
         assert asbool(str_bool) == expected
 
     def test_mention_extractor(self):
-        from kallithea.lib.utils2 import extract_mentioned_usernames
+        from kallithea.lib.webutils import extract_mentioned_usernames
         sample = (
             "@first hi there @world here's my email username@example.com "
             "@lukaszb check @one_more22 it pls @ ttwelve @D[] @one@two@three "