localrepo: make _refreshfilecachestats unfiltered method to refresh correctly
Before this patch, if transaction is started via "filtered repo"
object, _refreshfilecachestats() at closing transaction doesn't
refresh file stat of any @filecache properties correctly, because:
- _refreshfilecachestats() omits refreshing file stat of a
@filecache property, if it doesn't appear in self.__dict__
- if transaction is started via "filtered repo",
_refreshfilecachestats() is applied on "filtered repo"
because repo.transaction() adds "self._refreshfilecachestats" to
post close procedures. repo.transaction() isn't unfiltered method,
and "self" in it means "filtered repo" in this case.
Transactions started by explicit repo.transaction() easily causes
this situation.
- _refreshfilecachestats() applied on "filtered repo" omits whole
refreshing
because @filecache properties are stored into "unfiltered repo",
and appear only in self.__dict__ of "unfiltered repo".
This incorrect refreshing causes unnecessary reloading from files.
To refresh file stat of @filecache properties at closing transaction
correctly, this patch makes _refreshfilecachestats() unfiltered
method.
This patch chooses making _refreshfilecachestats() unfiltered method
instead of making transaction() unfiltered method, to reduce
unexpected side effect.
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