spanset: directly use __contains__ instead of a lambda Spanset are massively used in revset. First because the initial subset itself is a repo wide spanset. We speed up the __and__ operation by getting rid of a gratuitous lambda call. A more long terms solution would be to: 1. speed up operation between spansets, 2. have a special smartset for `all` revisions. In the mean time, this is a very simple fix that buyback some of the performance regression. Below is performance benchmark for trival `and` operation between two spansets. (Run on an unspecified fairly large repository.) revset tip:0 2.9.2) wall 0.282543 comb 0.280000 user 0.260000 sys 0.020000 (best of 35) before) wall 0.819181 comb 0.820000 user 0.820000 sys 0.000000 (best of 12) after) wall 0.645358 comb 0.650000 user 0.650000 sys 0.000000 (best of 16) Proof of concept implementation of an `all` smartset brings this to 0.10 but it's too invasive for stable.

transaction: fix file descriptor leak for journal.backupfiles The journal.backupfiles descriptor wasn't being closed. This resulted in hgsubversion test runs having a bagillion descriptors open, which crashed on platforms with low open file limits (like OSX).

revset: also inline spanset._contained in __len__ For consistency with what happen in `__contains__`, we inline the range test into `__len__` too.

revset: inline spanset containment check (fix perf regression) Calling a function is super expensive in python. We inline the trivial range comparison to get back to more sensible performance on common revset operation. Benchmark result below: Revision mapping: 0) 3f83fc5cfe71 2.9.2 release 1) bcfd44abad93 current @ 2) This revision revset #0: public() 0) wall 0.010890 comb 0.010000 user 0.010000 sys 0.000000 (best of 201) 1) wall 0.012109 comb 0.010000 user 0.010000 sys 0.000000 (best of 199) 2) wall 0.012211 comb 0.020000 user 0.020000 sys 0.000000 (best of 197) revset #1: :10000 and public() 0) wall 0.007141 comb 0.010000 user 0.010000 sys 0.000000 (best of 361) 1) wall 0.014139 comb 0.010000 user 0.010000 sys 0.000000 (best of 186) 2) wall 0.008334 comb 0.010000 user 0.010000 sys 0.000000 (best of 308) revset #2: draft() 0) wall 0.009610 comb 0.010000 user 0.010000 sys 0.000000 (best of 279) 1) wall 0.010942 comb 0.010000 user 0.010000 sys 0.000000 (best of 243) 2) wall 0.011036 comb 0.010000 user 0.010000 sys 0.000000 (best of 239) revset #3: :10000 and draft() 0) wall 0.006852 comb 0.010000 user 0.010000 sys 0.000000 (best of 383) 1) wall 0.014641 comb 0.010000 user 0.010000 sys 0.000000 (best of 183) 2) wall 0.008314 comb 0.010000 user 0.010000 sys 0.000000 (best of 299) We can see this changeset gains back the regression for `and` operation on spanset. We are still a bit slowerfor the `public()` and `draft()`. Predicates not touched by this changeset.

ancestor: silence multiple ancestor warning outside of merge (issue4234) The current situation is a bit of a layering violation as merge-specific knowledge is pushed down to lower layers and leaks merge assumptions into other code paths. Here, we simply silence the warning with a hack. Both the warning and the hack will probably go away in the near future when bid merge is made the default.

revsetbenchmark: fix error raising We want to display the commands, not all arguments of the function. (The old code actually crash, failing to joining a list of lists.)

revset: fix revision filtering in spanset.contains (regression) The argument is `x` but the variable tested for filtering is `rev`. `rev` happens to be a revset methods, ... never part of the filtered revs. This method is now using `rev` for everything.

graft: do not use `.remove` on a smart set (regression) Revset calls use to return a list. Graft use to mutate that list. We cannot do this anymore leading to a crash when grafting multiple changeset with a revset. File ".../mercurial/commands.py", line 3117, in graft revs.remove(rev) AttributeError: '_addset' object has no attribute 'remove' We are late in code-freeze so we make the shortest possible fix by turning it back to a list.

help: clarify distinction among `contains`/`file`/`filelog` For a Mercurial new-comer, the distinction between `contains(x)`, `file(x)`, and `filelog(x)` in the "revsets" help page may not be obvious. This commit tries to make things more obvious (text based on an explanation from Matt in an FB group thread).

discovery: don't report all "unsynced" remote heads (issue4230) 8a9e0b523d2d made discovery more helpful - too helpful for some extreme use cases. Instead, we arbitrarily limit the list it at 4 and add 'or more'.

rebase: don't abort if we're asked to rebase an empty revset The documentation says we exit 1 if we have nothing to do, so avoid breaking that contract when we're passed an empty revset. This was changed in http://www.selenic.com/hg/rev/a259f7b488ab to improve the error message; keep the improved message, just not the abort.

largefiles: remove directories emptied after their files are moved (issue3515)

cmdserver: forcibly use L channel to read password input (issue3161) Command server is designed to use the channel protocol even if the server process is accessible to tty, whereas vanilla hg should be able to read password from tty in that case. So it isn't enough to swap sys.stdin: # works only if the server process is detached from the console sys.stdin = self.fin getpass.getpass('') sys.stdin = oldin or test isatty: # vanilla hg can't talk to tty if stdin is redirected if self._isatty(self.fin): return getpass.getpass('') else: ... Since ui.nontty flag is undocumented and command-server channels don't provide isatty(), this change won't affect the other uses of ui._isatty(). issue3161 also suggests to provide some context of messages. I think it can be implemented by using the generic templating function.

killdaemons: correct typo of _check() function caught by pyflakes

win32: add missing definition of _ERROR_NO_MORE_FILES caught by pyflakes

exchange: fix invalid reference to bundle2.UnknownPartError caught by pyflakes

match: fix NameError 'pat' on overflow of regex pattern length 'pat' was renamed to 'regex' in 9d28fd795215.

color: add missing handling of stderr capture introduced by 350dc24a553d It wouldn't raise exception without this change, but _bufferstates was wrong because of missing _bufferstates.pop() in colorui.popbuffer().

hgweb: replace excanvas.js with a newer version The current version of excanvas is unknown. Substitute it with the latest version from the excanvas website: http://code.google.com/p/explorercanvas/ Instead of using the "compiled" version, just use the readable one.

httppeer: reintroduce _abort that accidentally was removed in 167047ba3cfa Including the missing test coverage that would have caught it.

bundle2: gracefully handle hook abort We make sure any exceptions raised during the whole span of handling bundle2 processing are decorated. This let us catch exceptions raised by hooks prior to transaction commit.

bundle2: gracefully handle PushRaced error during unbundle Same drill again. We catch the PushRaced error, check if it cames from a bundle2 processing, if so we turn it into a bundle2 with a part transporting error information to be reraised client side.

bundle2: add an error message to push race error Errors with no explanations makes my uncle Bob sad.

bundle2: fix raising errors during heads checking If the heads on the server differ from the ones reported seen by the client at bundle time, we raise a PushRaced exception. However, the part raising the exception was broken. To fix it, we move the PushRaced class in the error module so it can be accessible everywhere without an import cycle. A test is also added to prevent regression.

bundle2: gracefully handle UnknownPartError during unbundle Same as for Abort error, we catch the error, encode it into a bundle2 reply (expected by the client) and stream this reply. The client processing of the error will raise the exception again.

bundle2: catch UnknownPartError during local push When doing local push, UnknownPartError from the server will be raised directly to the client. We need to catch them too.

bundle2: catch UnknownPartError during pull We narrow the exception catching while pulling.

bundle2: catch UnknownPartError during push We narrow the exception catching while unbundling the push reply.

bundle2: use a more specific UnknownPartError when no handler is found KeyError is very generic, we need something more specific for proper error handling.

bundle2: make error testing more modular We have more than Abort to test.

bundle2: gracefully handle abort during unbundle Clients expect a bundle2 reply to their bundle2 submission. So we catch the Abort error and turn it into a bundle2 containing a part transporting the exception data. The unbundling of this reply will raise the error again.

bundle2: decorate exception raised during bundle processing This is a small hack to help us do some graceful error handling in bundle2 without major refactoring. See embedded comment for details.