Matt Mackall <mpm@selenic.com> [Wed, 26 Aug 2015 16:27:14 -0500] rev 26222
templater: add new docheader/footer components for XML (issue4135)
The existing header/footer components were templated per-changeset,
and thus couldn't be correctly printed for an empty log
Augie Fackler <augie@google.com> [Thu, 10 Sep 2015 09:52:17 -0400] rev 26221
import-checker: use modern .endswith for multiple suffixes
Suggested by Anton Shestakov <engored@ya.ru> on the list. Thanks!
Gregory Szorc <gregory.szorc@gmail.com> [Sat, 22 Aug 2015 18:43:24 -0700] rev 26220
hgweb: use separate repo instances per thread
Before this change, multiple threads/requests could share a
localrepository instance. This meant that all of localrepository needed
to be thread safe. Many bugs have been reported telling us that
localrepository isn't actually thread safe.
While making localrepository thread safe is a noble cause, it is a lot
of work. And there is little gain from doing so. Due to Python's GIL,
only 1 thread may be processing Python code at a time. The benefits
to multi-threaded servers are marginal.
Thread safety would be a lot of work for little gain. So, we're not
going to even attempt it.
This patch establishes a pool of repos in hgweb. When a request arrives,
we obtain the most recently used repository from the pool or create a
new one if none is available. When the request has finished, we put that
repo back in the pool.
We start with a pool size of 1. For servers using a single thread, the
pool will only ever be of size 1. For multi-threaded servers, the pool
size will grow to the max number of simultaneous requests the server
processes.
No logic for pruning the pool has been implemented. We assume server
operators either limit the number of threads to something they can
handle or restart the Mercurial process after a certain amount of
requests or time has passed.
Gregory Szorc <gregory.szorc@gmail.com> [Sat, 22 Aug 2015 18:54:34 -0700] rev 26219
hg: establish a cache for localrepository instances
hgweb contained code for determining whether a cached localrepository
instance was up to date. This code was way too low-level to be in
hgweb.
This functionality has been moved to a new "cachedlocalrepo" class
in hg.py. The code has been changed slightly to facilitate use
inside a class. hgweb has been refactored to use the new API.
As part of this refactor, hgweb.repo no longer exists! We're very close
to using a distinct repo instance per thread.
The new cache records state when it is created. This intelligence
prevents an extra localrepository from being created on the first
hgweb request. This is why some redundant output from test-extension.t
has gone away.