revset: handle error of string unescaping

parser: move unescape helper from templater revset and fileset have a similar problem, so let's make it a common helper function.

unionrepo: take delta base in account with building unified revlog When general delta is enabled, the base is actually meaningful and should be used. With general delta is enabled, test-unionrepo.t crash without this fix.

extdiff: enable -I/-X with --patch Not sure how useful this really is, but it's trivial to add and ignoring the existing arguments supported seems like a bad UI.

extdiff: add a --patch argument for diffing changeset deltas One of the things I missed the most when transitioning from versioned MQ to evolve was the loss of being able to check that rebase conflicts were properly resolved by: $ hg ci --mq -m "before" $ hg rebase -s qbase -d tip $ hg bcompare --mq The old csets stay in the tree with evolve, but a straight diff includes all of the other changes that were pulled in, obscuring the code that was rebased. Diffing deltas can be confusing, but unless radical changes were made during the resolve, it is very clear when individual hunks are added, dropped or modified. Unlike the MQ technique, this can only compare a single pair of csets/patches at a time. Like the MQ method, this also highlights changes in the commit comment and other metadata. I originally tried monkey patching from the evolve extension, but that is too complicated given that it depends on the order the two different extensions are loaded. This functionality is also useful when comparing grafts however, so implementing it in the core is more than just convenience. The --change argument doesn't make much sense for this, but it isn't harmful so I didn't bother blocking it. The -I/-X options are ignored because of a limitation of cmdutil.export(). We'll fix that next.

extdiff: prepare sections of dodiff() for conditionalizing This is purely indenting under an unconditional branch, so that the actual changes in the next patch are clear. Feel free to fold them if desired.

hgweb: drop unused import

help/config: back out 5f2a1ebd6e78 This breaks building manpages, and by association breaks building debs. timeless has a fix coming, but it turns out we'll need to back out 5f2a1ebd6e78 anyway, so just back it out now to fix building packages.

filemerge: add non-interactive :merge-local and :merge-other There are two non-interactive internal merge tools, :other and :local, but they don't really merge, they just pick all changes from the local or other version of the file. In some situations, it is known that we want a merge and also know that all merge conflicts should be resolved in one direction. Although external merge tools can do this, sometimes it can be convenient to do so from within hg, without invoking a merge tool. These new :merge-local and :merge-other tools can do just that.

simplemerge: enable option to resolve conflicts one way With this change, the simplemerge algorithm grows an option to only return the local or the other hunk in a conflicting region.

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

import-checker: use modern .endswith for multiple suffixes Suggested by Anton Shestakov <engored@ya.ru> on the list. Thanks!

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.

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.

hgweb: create function to perform actions on new repo We perform some common tasks when a new repo instance is obtained. In preparation for changing how we obtain repo instances, factor this functionality into a standalone function.

hgweb: remove proxy to hgweb instance We were temporarily routing attributes until all request-specific attributes from hgweb were moved to requestcontext. We have finally reached that juncture and we can remove the proxy. At this point, only the repo instance is prone to race conditions between threads. This will be dealt with shortly.

dispatch: disable demandimport when invoking the debugger Turns out that demandimport confuses pudb, which does some pretty complicated imports. I think it's reasonable to disable demandimport here.

templater: create string unescape helper (issue4798) This gives us a unified place to do error-handling of string-escaping syntax errors

parsers: use PyTuple_New and SET_ITEM to construct metadata pair of markers With these 2 patches, fm1readmarkers() gets slightly faster: obsolete._fm1readmarkers() for 78644 entries 58.0 -> 56.2msec

parsers: use PyTuple_SET_ITEM() to fill new marker tuples Because we know these tuples have no member yet, PyTuple_SetItem() isn't necessary.

revset: uncache filteredset.__contains__ Since 96b6b3d78697, condition function returns a cached value, so there's little benefit to cache __contains__. No measurable difference found in contrib/base-revsets.txt.

hgweb: assign ctype to requestcontext The very existence of ctype is a bit hacky. But we roll with it. Before this patch, there was possibly a race condition between 2 threads handling file requests: 1 thread could set the ctype and another serving a different file would read and use that potentially wrong ctype.

hgweb: add reponame to requestcontext We have to use object.__setattr__ until the app proxy is gone.

hgweb: don't access self.repo during request processing We want all repository accesses to go through requestcontext.repo so the request is isolated from the application.