localrepo: make _applyrequirements more specific

Localrepo's _applyrequirements function isn't very straightforward about what
it does. Its purpose is to both act as a setter for the requirements attribute,
and to apply appropriate requirements to the opener's configuration.

This change makes the function just focus on the latter responsibility. We
rename it as such, and make setting the requirements attribute the
responsibility of the caller.

mercurial/localrepo.py

@@ -291,7 +291,8 b' class localrepository(object):'
         self.sopener = self.svfs
         self.sjoin = self.store.join
         self.vfs.createmode = self.store.createmode
-        self._applyrequirements(requirements)
+        self.requirements = requirements
+        self._applyopenerreqs()
         if create:
             self._writerequirements()
 
@@ -334,9 +335,8 b' class localrepository(object):'
             caps.add('bundle2=' + urllib.quote(capsblob))
         return caps
 
-    def _applyrequirements(self, requirements):
-        self.requirements = requirements
-        self.svfs.options = dict((r, 1) for r in requirements
+    def _applyopenerreqs(self):
+        self.svfs.options = dict((r, 1) for r in self.requirements
                                            if r in self.openerreqs)
         chunkcachesize = self.ui.configint('format', 'chunkcachesize')
         if chunkcachesize is not None:
@@ -1828,7 +1828,8 b' class localrepository(object):'
             #                    new format-related
             # requirements from the streamed-in repository
             requirements.update(self.requirements - self.supportedformats)
-            self._applyrequirements(requirements)
+            self.requirements = requirements
+            self._applyopenerreqs()
             self._writerequirements()
 
             if rbranchmap: