match: reformat `syntaxes` dictionary for better maintainability

match: provide and use a quick way to escape a single byte The previous function has a lot of overhead (including being a function). In the `_globre` case, we always escape a single byte. So we provide a dictionary dedicated to this use case. We directly use the dictionary to avoid a function call, these are expensive in Python. Again, this raise a very significant performance gain: Before: ! wall 0.059793 comb 0.060000 user 0.060000 sys 0.000000 (median of 100) After: ! wall 0.020390 comb 0.020000 user 0.020000 sys 0.000000 (median of 146) Total improvement for the full series: Before: ! wall 0.153153 comb 0.150000 user 0.150000 sys 0.000000 (median of 66) After: ! wall 0.020390 comb 0.020000 user 0.020000 sys 0.000000 (median of 146)

perf: make `clearfilecache` helper work with any object If the object is not a localrepo, it won't have an `unfiltered` method (and won't need one).

perf: move some of the perftags benchmark to the setup function Creating fresh objects and clearing the cache should not be part of the timing. before: ! wall 0.020851 comb 0.020000 user 0.020000 sys 0.000000 (median of 138) after: ! wall 0.018740 comb 0.020000 user 0.020000 sys 0.000000 (median of 141)

perf: use the new setup function in "perfbookmarks" This command was picked arbitrarily to display the usefulness of the new feature. In my Mercurial repository (with very few bookmarks), moving cache cleanup in the dedicated setup function has a visible and stable effect on the benchmark number. before: ! wall 0.000061 comb 0.000000 user 0.000000 sys 0.000000 (median of 40837) after: ! wall 0.000058 comb 0.000000 user 0.000000 sys 0.000000 (median of 40500)

perf: add a `setup` argument to run code outside of the timed section With this new argument, it is possible to perform special setup and cleanup outside of code actually timed. This is useful to provide more accurate benchmark.

perf: explicitly pass title as a keyword argument in `perfdiffwd` This will help to update the timer function arguments in a later changeset.

ui: unify argument name of ui.log() It's called an "event" in both blackbox and logtoprocess.

logtoprocess: extract logger class from ui wrapper It provides the same interface as the blackboxlogger. The ui wrapper will be removed shortly.

merge with stable

py3: use node.hex(m.digest()) instead of m.hexdigest() hashlib.sha1.hexdigest() returns str on Python 3. Differential Revision: https://phab.mercurial-scm.org/D5287

tests: stabilize the recent checkexec changes on Windows This goes with bd0874977a5e.

tests: add Balto configuration file I have been developing a Mercurial test runner plugin for being able to run Mercurial tests with Balto (https://bitbucket.org/lothiraldan/balto/src/default/). Balto requires a configuration file so let's include it, I have added the required information in the configuration file as comments. I hope Balto would be an helpful tool for other people than me. Differential Revision: https://phab.mercurial-scm.org/D5283

tests: make test-alias.t pass with re2 Locally, these "non-ASCII character in alias" errors don't show up, though I get them when the alias is defined at the command line rather than in an hgrc. The brokenness comes from the fact that hgrcs are parsed with regexes, and re/re2 differ in this way: $ python -c 'import re; print(re.compile("(.*)").match("aaa\xc0bbbb").groups())' ('aaa\xc0bbbb',) $ python -c 'import re2; print(re2.compile("(.*)").match("aaa\xc0bbbb").groups())' ('aaa',) Apparently re2 stops when it encounters invalid utf8 (which I suppose makes sense given that '.' matches what appears to be a codepoint rather than a byte). This is presumably a bug in hg, but not very important, so just change the test to stick to valid utf8. Differential Revision: https://phab.mercurial-scm.org/D5288

context: remove seemingly impossible code branch I'm not a Python expert, but I can't think of a way that the following branch can ever be hit: def _changeid(self): if r'_changeid' in self.__dict__: return self._changeid It seems to me that if that condition is true, then this function would not have been called. The only exception I can think of is if a reference to the function had been stored beforehand, something like this: c = fctx.__dict__['_changeid'] fctx._changeid c() But that seems like very unlikely code to exist. The condition was added in 921b64e1f7b9 (filecontext: use 'is not None' to check for filelog existence, 2013-05-01) as a "bonus" change (in addition to what the patch was actually about) Differential Revision: https://phab.mercurial-scm.org/D5289

checkexec: create destination directory if necessary Since 460733327640, a "share" use the cache of the source repository. A side effect is that no `.hg/cache` directory exists in the "share" anymore. As a result, the checkexec logic can't use it to create its temporary file and have to use the working copy for that. This is suboptimal, it pollutes the working copy and prevents them to keep the file around in cache. We do not want to use the cache directory for the share target, it might be on a different file system. So instead, we (try to) create the directory if it is missing. This is a simple change that fixes the current behavior regression on stable. On default, we should probably ensure the proper directories are created when initializing the repository. We should also introduce a 'wcache' directory to hold cache file related to the working copy. This would clarify the cache situation regarding shares. The tests catch a couple of other affected cases.

py3: use pycompat.byteskwargs() to covert keys of kwargs to bytes Differential Revision: https://phab.mercurial-scm.org/D5286

py3: use '%d' for integers instead of '%s' Differential Revision: https://phab.mercurial-scm.org/D5285

py3: add 9 new passing tests caught by buildbot Differential Revision: https://phab.mercurial-scm.org/D5284

branch: allow changing branch of merge commits with --rev Tests show that changing branch of merge commits works fine with evolution and without, so let's allow it. Other safeguards should prevent users from shooting themselves in the foot.

lfs: ensure that the return of urlopener.open() is closed No problem observed, just an oversight noticed while reading documentation.

changegroup: avoid instantiating storage if we are not using it Differential Revision: https://phab.mercurial-scm.org/D5280

http: allow 'auth.prefix' to have a username consistent with the URI It may be a little weird to put a username in the prefix, but the documentation doesn't disallow it, and silently disallowing it has caused confusion[1]. The username must match what is passed in (which seems to be from the URI via a circuitous route), as well as 'auth.username' if it was specified. I thought about printing a warning for a mismatch, but we already don't print a warning if the 'auth.username' and URI username don't match. This change allows the first and second last new test cases to work as expected. It looks like this would have been a problem since at least 0593e8f81c71. [1] https://www.mercurial-scm.org/pipermail/mercurial/2018-November/051069.html

lfs: make the exception messages consistent I don't love that it repeats 'HTTP Error' in an already long message, but I doubt that we should assume that it will always say that on the original exception message.

lfs: handle URLErrors to add additional information Sometimes the blob server is hit first (e.g. on push), and sometimes it's hit last (e.g. pull). Throw in depth first subrepo operations, and things quickly get insane. It wasn't even mentioning LFS, so just saying "connection refused" can be confusing- especially if the blob server is a secondary server and connecting to the repo server works. The exception handler for the transfer handler will print the full path to the blob, but that seems fine given that it might be necessary to debug a second server. (We don't yet support a standalone blob server, so the handler for the Batch API will cover 99.9% of the current problems. But it might as well be handled now while I'm thinking about it.) The function for translating to a message was mostly borrowed from scmutil.catchall().

lfs: improve the hints for common errors in the Batch API The previous message was too debug-ish and less action oriented than a hint should be. The remaining errors that aren't handled are more along the lines of programming errors (not using POST, bad accept type, etc), so I'm not bothering with that. The friendly errors purposely use `self.baseurl` instead of the full Batch API endpoint because I'd expect some copy/paste/modify on the part of the user here, and it would be more confusing if '/objects/batch' magically appeared, but shouldn't be used in the config setting. It still seems like the right thing for debugging in the catchall case.

lfs: provide more Batch API error info via a hint in the raised exception A coworker had a typo in `lfs.url`, forgot it was even set because usually the blob server is inferred, and then got a 404. It would have been easier to debug with the failing URL printed.

scmutil: display the optional hint when handling StorageError in catchall() Other than CensoredNodeError (which is also a StorageError), it looks like all exceptions with a hint display them. I'm not sure that it makes sense to have a hint for censored nodes, so I'm not bothering with that. It looks like nobody is using this yet, as the tests don't change.

sparse-revlog: align endrevidx usages in the _slicechunktosize All "startrevidx..endrevidx" ranges in this function are now half-open.

graft: do not try to skip rev derived from ancestor more than once (issue6024) We check 'x in revs' in other cases, so let's do the same. The test case credits to Tom Prince.

subrepo: print the status line before creating the peer for better diagnostics I ran into a problem where I tried updating to a different branch, and the process appeared to hang. It turned out that the subrepo revision wasn't available locally, and I must have originally cloned it from an `hg serve -S` on a machine that currently wasn't serving anything. It took 2+ minutes to timeout, and didn't mention what it was connecting to even then. There are a couple of other issues in this scenario too. - The repo is dirty after the failed checkout because the top level repo is updated first. We should probably make 2 passes- top down to pull everything needed, and then do an update once everything is in place. - Something must be reading .hgsubstate from wdir because if the same merge command is run after the timeout, a prompt is issued that the local and remote subrepo diverged, instead of hanging. But it lists the local version and remote version as having the same hash.

sparse-revlog: use `span` variable as intended The variable was planned to be used in the while condition but was not used yet.

tests: stabilize test-commandserver.t on Windows It looks like new test coverage in 054d0fcba2c4, rather than a code change.

histedit: conditionalize the imports of 'fcntl' and 'termios' The recent import of chistedit in c36175456350 made Windows sad. I'm not sure if there's other stuff that needs to be done here (e.g. change the default interface), but this makes the tests run again. It would have been nicer if the error message indicated these modules were the problem, but instead it said "*** failed to import extension histedit: No module named histedit". I'm not sure if there's anything we can do about that.

logtoprocess: update commandfinish options arguments d2c997b8001f changed the logtoprocess API with the effect of not exposing the positional arguments to the logtoprocess scripts anymore. We have some scripts that use the duration and return code of the "commandfinish" event to monitor hg calls. Update the logging of the "commandfinish" to expose those values as options argument, which will be accessible as `OPT_RETURN_CODE` and `OPT_DURATION` in logtoprocess arguments. The code has been formatted with Black. Differential Revision: https://phab.mercurial-scm.org/D5282

rebase: fix two ui.logs to actually have text when using default blackbox log Some implementations of ui.log record structured information along with the ui.log which can be used for metrics, but ui.log() as implemented by the blackbox logging does not do anything special with this, and we end up with a log line with no text (not even a line break) so it ends up looking something like: date time user @node (pid) [rebase]> date time user @node (pid) ... Differential Revision: https://phab.mercurial-scm.org/D5279

wireprotov2server: let repo.narrowmatch(match) do matcher intersection This is supported since 4fd0fac48922 (localrepo: allow narrowmatch() to accept matcher to intersect with, 2018-09-28). Differential Revision: https://phab.mercurial-scm.org/D5281

blackbox: extract function to test if log event is tracked This will be a required method of the logger interface.

blackbox: initialize inlog flag properly And ditch the "bb" prefix as it's no longer a ui extension class.

blackbox: initialize repo attribute properly And ditch the "bb" prefix as it's no longer a ui extension class.

blackbox: unindent "if True" block

blackbox: extract logger class from ui wrapper This moves most functions to new blackboxlogger class. The ui wrapper will be removed later.

blackbox: rename variables to prepare extracting core logic from ui wrapper I'm going to add ui.setlogger() function so that I can enable logging feature in command server without extending ui.__class__. This prepares for it. "self" will be a logger instance, so this patch renames some of them to "ui".

sparse-revlog: rework the way we enforce chunk size limit We move from a O(N) algorithm to a O(log(N)) algorithm. The previous algorithm was traversing the whole delta chain, looking for the exact point where it became too big. This would result in most of the delta chain to be traversed. Instead, we now use a "binary" approach, slicing the chain in two until we have a chunk of the appropriate size. We still keep the previous algorithm for the snapshots part. There are few of them and they are large bits of data distant from each other. So the previous algorithm should work well in that case. To take a practical example of restoring manifest revision '59547c40bc4c' for a reference NetBeans repository (using sparse-revlog). The media time of the step `slice-sparse-chain` of `perfrevlogrevision` improve from 1.109 ms to 0.660 ms.

doctest: add a `issnapshot` method to _testrevlog We'll need it soon.

tests: add `revlogutils.deltas` module to doctests The doctest in these module have been from `mercurial.revlog` but the module was not added to the doctests. Spotted by Yuya Nishihara.

merge with stable

mergetools: adjust Beyond Compare config on Mac/Linux Set the labels of the Linux and Mac versions of Beyond Compare from Mercurial's builtin variables, same as the Windows version. Differential Revision: https://phab.mercurial-scm.org/D5255