# HG changeset patch
# User Anton Shestakov <av6@dwimlabs.net>
# Date 1710781300 10800
# Node ID 0674b56d352669dec226993eb4c1dcc9e2b2c117
# Parent  9638df99836ff44a2c4296dc82c408d7d9a2461c
topic: drop oldbranchmap context manager, _topiccache is now a mixin

I think this hack was needed back then in d49f75eab6a3 because _topiccache was
a subclass of branchmap.branchcache directly, but now it's a mixin. In any
case, I didn't see any failures in the tests, so it should be fine.

diff -r 9638df99836f -r 0674b56d3526 hgext3rd/topic/topicmap.py
--- a/hgext3rd/topic/topicmap.py	Tue Jun 25 17:10:03 2024 +0400
+++ b/hgext3rd/topic/topicmap.py	Mon Mar 18 14:01:40 2024 -0300
@@ -1,4 +1,3 @@
-import contextlib
 import hashlib
 
 from mercurial.i18n import _
@@ -151,29 +150,15 @@
     finally:
         repo._autobranchmaptopic = previous
 
-# needed to prevent reference used for 'super()' call using in branchmap.py to
-# no go into cycle. (yes, URG)
-_oldbranchmap = branchmap.branchcache
-
-@contextlib.contextmanager
-def oldbranchmap():
-    previous = branchmap.branchcache
-    try:
-        branchmap.branchcache = _oldbranchmap
-        yield
-    finally:
-        branchmap.branchcache = previous
-
 class _topiccache(object): # combine me with branchmap.branchcache
 
     def __init__(self, *args, **kwargs):
-        # super() call may fail otherwise
-        with oldbranchmap():
-            super(_topiccache, self).__init__(*args, **kwargs)
+        super(_topiccache, self).__init__(*args, **kwargs)
         self.phaseshash = None
 
     def copy(self):
         """return an deep copy of the branchcache object"""
+        assert isinstance(self, (branchmap.branchcache, branchmap.remotebranchcache))  # help pytype
         entries = compat.bcentries(self)
         args = (entries, self.tipnode, self.tiprev, self.filteredhash,
                 self._closednodes)
@@ -188,6 +173,7 @@
         """call branchmap.load(), and then transform branch names to be in the
         new "//" format
         """
+        assert isinstance(self, branchmap.branchcache)  # help pytype
         super(_topiccache, self).load(repo, lineiter)
         entries = compat.bcentries(self)
 
@@ -201,6 +187,7 @@
 
         - False when cached tipnode is unknown or if we detect a strip.
         - True when cache is up to date or a subset of current repo."""
+        assert isinstance(self, (branchmap.branchcache, branchmap.remotebranchcache))  # help pytype
         valid = super(_topiccache, self).validfor(repo)
         if not valid:
             return False
@@ -237,6 +224,7 @@
         missing heads, and a generator of nodes that are strictly a superset of
         heads missing, this function updates self to be correct.
         """
+        assert isinstance(self, (branchmap.branchcache, branchmap.remotebranchcache))  # help pytype
         if not istopicfilter(repo.filtername):
             return super(_topiccache, self).update(repo, revgen)