revlog: list older-but-still-around file in `files`

These older files will eventually be removed, but we have to take them in account until they are. So we update `files` to keep fncache happy.

Differential Revision: https://phab.mercurial-scm.org/D10868

mercurial/revlog.py

@@ -2821,10 +2821,13 b' class revlog(object):'
                 res.append(self._datafile)
         else:
             res.append(self._docket_file)
+            res.extend(self._docket.old_index_filepaths(include_empty=False))
             if self._docket.data_end:
                 res.append(self._datafile)
+            res.extend(self._docket.old_data_filepaths(include_empty=False))
             if self._docket.sidedata_end:
                 res.append(self._sidedatafile)
+            res.extend(self._docket.old_sidedata_filepaths(include_empty=False))
         return res
 
     def emitrevisions(

mercurial/revlogutils/docket.py

@@ -182,6 +182,13 b' class RevlogDocket(object):'
         self._index_uuid = make_uid()
         return self.index_filepath()
 
+    def old_index_filepaths(self, include_empty=True):
+        """yield file path to older index files associated to this docket"""
+        # very simplistic version at first
+        for uuid, size in self._older_index_uuids:
+            if include_empty or size > 0:
+                yield b"%s-%s.idx" % (self._radix, uuid)
+
     def data_filepath(self):
         """file path to the current data file associated to this docket"""
         # very simplistic version at first
@@ -198,6 +205,13 b' class RevlogDocket(object):'
         self._data_uuid = make_uid()
         return self.data_filepath()
 
+    def old_data_filepaths(self, include_empty=True):
+        """yield file path to older data files associated to this docket"""
+        # very simplistic version at first
+        for uuid, size in self._older_data_uuids:
+            if include_empty or size > 0:
+                yield b"%s-%s.dat" % (self._radix, uuid)
+
     def sidedata_filepath(self):
         """file path to the current sidedata file associated to this docket"""
         # very simplistic version at first
@@ -214,6 +228,13 b' class RevlogDocket(object):'
         self._sidedata_uuid = make_uid()
         return self.sidedata_filepath()
 
+    def old_sidedata_filepaths(self, include_empty=True):
+        """yield file path to older sidedata files associated to this docket"""
+        # very simplistic version at first
+        for uuid, size in self._older_sidedata_uuids:
+            if include_empty or size > 0:
+                yield b"%s-%s.sda" % (self._radix, uuid)
+
     @property
     def index_end(self):
         return self._index_end