rebase: fix bug that prevented dry-run rebases from printing failures As far as I can tell it should be fine to unconditionally skip _prepareabortorcontinue if we're in the process of raising an Abort here. Differential Revision: https://phab.mercurial-scm.org/D6226

rebase: demonstrate bug in dry-run mode which causes cycles to not be reported Differential Revision: https://phab.mercurial-scm.org/D6225

test: minor cleanup to test-server-view.t While looking into adding error output in this test, I did some cleanup.

repoview: improve documentation for `repo.filtered` method I am sitting next to Joerg Sonnenberger and we are discussion his experience with repoview. This first effect of this discussion is this documentation clarification.

revset: short docstring for checkstatus This is where all the action happens for the status-related revsets, and a little documentation doesn't hurt.

discovery: stop direct use of attribute of partialdiscovery Instead of accessing `undecided` directly for ui display purposes, we introduce a `stats()` method that could be extended in the future with more interesting information. This is in preparation for a forthcoming Rust version of this object. Indeed, attributes and furthermore properties are a bit complicated for classes in native code. We could go further and rename `undecided` to mark it private, but `_undecided` is already taken as support for `_undecided` lazyness.

overlayworkingctx: remove misleading trailing slash from directory pattern The paths passed into the matcher are normalized (this applies to include patterns and regular patterns, and to both glob kind and path kind), so the regex for input "foo/" ended up being "foo(?:/|$)". Once we have a (recursive) pattern kind only for directories, we could switch to that here and remove the "mfiles[0] == path" check. Until then, let's at least make it not misleading. Differential Revision: https://phab.mercurial-scm.org/D6224

overlayworkingctx: fix file/dir audit to be repo-relative Before this patch, test-rebase-inmemory.t would stop erroring out about the conflict if you added a "cd a" before line 252. That was because a glob matcher (which are relative) was unintentionally used. That happened because the matcher was given "include" patterns (not regular patterns), and "include" patterns are always glob by default (i.e. unless you write them including the kind prefix). IOW, the "default='path'" argument passed to ctx.match() was ignored. Differential Revision: https://phab.mercurial-scm.org/D6223

messages: replace some instances of "folder" by "directory" I'm pretty sure this is our preferred term. Differential Revision: https://phab.mercurial-scm.org/D6222

match: fix re2 compability broken in 2e2699af5649 When using re2, we call test_match() instead of match() on the compiled regex object. While match() returns a matcher object or None, test_match() returns True or False. So since 2e2699af5649 running test on a machine with a re2 install fails in many places. Instead we make the code a bit more general and everything goes back to normal.

py3: add b'' prefixes to new doctests in match.py # skip-blame as just b'' prefixes Differential Revision: https://phab.mercurial-scm.org/D6221

py3: add one new passing test found by buildbot Differential Revision: https://phab.mercurial-scm.org/D6220

cext: cast s# arguments of Py_BuildValue() to Py_ssize_t The doc doesn't state that "s#" of Py_BuildValue() is controlled by PY_SSIZE_T_CLEAN (unlike the one for PyArg_ParseTuple()), but actually it's switched to Py_ssize_t. https://docs.python.org/2/c-api/arg.html#c.Py_BuildValue https://github.com/python/cpython/blob/2.7/Python/modsupport.c#L432 Follow up for b01bbb8ff1f2 and 896b19d12c08.

remotefilelog: correctly reject wdir filenodes This fixes `hg grep -r 'wdir()'` when remotefilelog is enabled and the working directory contains uncommitted modifications. Differential Revision: https://phab.mercurial-scm.org/D6217

remotefilelog: add tests of `hg grep -r 'wdir()'` This demonstrates how remotefilelog breaks grepping dirtied working directories. A future change will introduce a fix. Differential Revision: https://phab.mercurial-scm.org/D6216

config: read configs from directories in lexicographical order Mercurial currently reads the .rc files specified in HGRCPATH (and the system-default paths) in directory order, which is unspecified. My team at work maintains a set of .rc files. So far there has been no overlap between them, so we had not noticed this behavior. However, we would now like to release some common .rc files and then have another one per plaform with platform-specific overrides. It would be nice if we can determine the load order by choosing names carefully. This patch enables that by loading the .rc files in lexicographical order. Before this patch, the added test case would consistently say "30" on my file system (whatever I have -- some Linux FS). Differential Revision: https://phab.mercurial-scm.org/D6193

remotefilelog: fix crash on `hg addremove` of added-but-deleted file If you `hg add` a file and then delete it from disk, and then run `hg addremove`, the file ends up in the "removed" set that gets passed to the findrenames() override. We then crash because the file is not in the working copy parent. This patch fixes that. Differential Revision: https://phab.mercurial-scm.org/D6194

packaging: ensure that --python is an absolute path when building on Windows For whatever reason, even though only python2 is on PATH, passing `python.exe` causes the later check that it's not py3 to bail out.

packaging: don't crash building wix with python3.6 and earlier `capture_output` was added in 3.7. I was tempted to just check and abort in build.py, since Windows doesn't have the Linux problem where some distros only ship an older python. But this is in a library that could be used elsewhere in the future.

chistedit: add basic colours to diff view This isn't complete, and it would be nice to show the exact same colours that `hg diff` would show. That goal is too lofty, so this just shows some basic colours, on the premise that a little is better than nothing.

chistedit: use default curses colours Terminals will define default colours (for example, white text on black background), but curses doesn't obey those default colours unless told to do so. Calling `curses.use_default_colors` makes curses obey the default terminal colours. One of the most obvious effects is that this allows transparency on terminals that support it. This also brings chistedit closer in appearance to crecord, which also uses default colours. The call may error out if the terminal doesn't support colors, but as far as I can tell, everything still works. If we need a more careful handling of lack of colours, blame me for not doing it now.

match: let regex match function return a boolean Match function for regex pattern kind is built through _buildregexmatch() and _buildmatch() using _rematcher() that returns a re.match function, which either returns a match object or None. This does not conform to Mercurial's matcher interface for __call__() or exact(), which are expected to return a boolean value. We fix this by building a lambda around _rematcher() in _buildregexmatch(). Accordingly, we update doctest examples to remove bool() calls that are now useless.

match: make arguments of _expandsets() optional Arguments 'ctx', 'listsubrepos' and 'badfn' are optional in function body.

match: make _donormalize's auditor and warn arguments optional Argument 'warn' is actually non-required, since there's a 'if warn:' check before usage. Argument 'auditor' is passed to pathutil.canonpath(), in which it is optional.

match: add doctest examples in match() Make the docstring raw, as it now includes escape characters.

match: complete documentation of match() parameters

match: add doctest examples for patkind()

match: add a docstring with doctest examples to patternmatcher Doctest examples aim at illustrating how __call__() and exact() are different, depending on the pattern kind.

match: add doctest examples for exactmatcher Make the docstring raw, since it now includes escape characters.

localrepo: don't allow lookup of working directory revision It seems that repo.lookup(), which is what supports the "lookup" wire protocol command, should not allow the working copy revision input. This fixes both the pull test and the convert test I just added. Differential Revision: https://phab.mercurial-scm.org/D6215

tests: demonstrate broken pull of "ffffffffffff" revision Differential Revision: https://phab.mercurial-scm.org/D6214

tests: demonstrate broken `hg convert` if "ffffffffffff" is in description Differential Revision: https://phab.mercurial-scm.org/D6213

tests: add test of for hash reference translation by `hg convert` The convert extension translates commit references in the commit message. We didn't have any explicit testing of this before, so let's add a test. Differential Revision: https://phab.mercurial-scm.org/D6212

py3: write out hgextindex as bytes in setup.py I hit this trying to build the py2exe target using python3, just to see what would happen. After commenting out `py2exe.Distribution` in setup.py and pointing to a local copy of py2exe that supports python3[1], it complained that `out` was bytes, not str. [1] https://github.com/albertosottile/py2exe/releases/tag/v0.9.3.0

setup: fix a possible NameError on rust build File "setup.py", line 975, in rustbuild "command: %r, environment: %r" % (self.rustsrcdir, cmd, env)) NameError: global name 'cmd' is not defined

crecord: new keys g & G to navigate to the top and bottom respectively This patch introduces two new keys 'g' and 'G' that helps to navigate to the top and bottom of the file/hunk/line respectively. This is inline with the shortcuts used in man, less, more and such tools that makes it convenient to navigate swiftly. 'g' or HOME navigates to the top most file in the ncurses window. 'G' or END navigates to the bottom most file/hunk/line depending on the whether the fold is active or not. If the bottom most file is folded, it navigates to that file and stops there. If the bottom most file is unfolded, it navigates to the bottom most hunk in that file and stops there. If the bottom most hunk is unfolded, it navigates to the bottom most line in that hunk. Differential Revision: https://phab.mercurial-scm.org/D6178

chistedit: properly show verbose diffs I'm not sure if that ever worked and it's an internal API breakage, but `"verbose": True` is not correctly parsed, as most of these options are parsed by diffopts, whereas verbose is a global option. Setting the UI to verbose instead does work and does show a verbose patch, with full commit message. It also shows all files, which unfortunately are a bit hard to read on a single line in the default verbose template. Thus, we also change the default template to use the status template, which shows one file per line as well as its modification state.

interactive: do not prompt about files given in command line For commit and revert commands with --interactive and explicit files given in the command line, we now skip the invite to "examine changes to <file> ? [Ynesfdaq?]". The reason for this is that, if <file> is specified by the user, asking for confirmation is redundant. In patch.filterpatch(), we now use an optional "match" argument to conditionally call the prompt() function when entering a new "header" item. We use .exact() method to compare with files from the "header" in order to only consider (rel)path patterns. Add tests with glob patterns for commit and revert, to make sure we still ask to examine files in these cases.

zstandard: vendor python-zstandard 0.11 The upstream source distribution from PyPI was extracted. Unwanted files were removed. The clang-format ignore list was updated to reflect the new source of files. The project contains a vendored copy of zstandard 1.3.8. The old version was 1.3.6. This should result in some minor performance wins. test-check-py3-compat.t was updated to reflect now-passing tests on Python 3.8. Some HTTP tests were updated to reflect new zstd compression output. # no-check-commit because 3rd party code has different style guidelines Differential Revision: https://phab.mercurial-scm.org/D6199

cext: make osutil.c PY_SSIZE_T_CLEAN This is needed to avoid a deprecation warning on Python 3.8. With this change, we no longer see deprecation warnings for this issue on Python 3.8. Differential Revision: https://phab.mercurial-scm.org/D6198

cext: make parsers.c PY_SSIZE_T_CLEAN This is needed to avoid a deprecation warning in Python 3.8. I believe the conversion of int to Py_ssize_t is harmless in the changed locations. But this being C code, it should be audited with care. Differential Revision: https://phab.mercurial-scm.org/D6197

cext: make revlog.c PY_SSIZE_T_CLEAN Without this, Python 3.8 emits a deprecation warning, as using int for # values is deprecated. Many existing modules use PY_SSIZE_T_CLEAN, so this shouldn't be contentious. I audited the file for all # formatters and verified we are using Py_ssize_t everywhere now. Differential Revision: https://phab.mercurial-scm.org/D6196

tests: add optional output for Python 2.7 deprecation We already had one of these a few lines above. We need it here as well. Differential Revision: https://phab.mercurial-scm.org/D6203

setup: use raw string for regular expression Otherwise Python 3.8 complains about the backslash. Differential Revision: https://phab.mercurial-scm.org/D6202

automation: use raw strings when there are backslashes Otherwise Python 3.8 complains. Differential Revision: https://phab.mercurial-scm.org/D6201

perf: make perf.run-limits code work with Python 3 We need b'' because perf.py isn't run through the source transformer. We need to cast the exception to bytes using pycompat.bytestr() because ValueError can't be %s formatted due to built-in exceptions lacking __bytes__. We need to pycompat.sysstr() before the float() and int() cast so the ValueError message doesn't have b'' in it. Even with that, it looks like the error message for the ValueError for float casts added quotes, so we need to account for that in test output. Differential Revision: https://phab.mercurial-scm.org/D6200

localrepo: rename crev in _filecommit() to cnode, since it's a node I know we often use "rev" generically, but here's it always a node, so it helps to be specific. Differential Revision: https://phab.mercurial-scm.org/D6181

tests: unset environment variable P in test-revset2.t (issue6109) The test tests/test-revset2.t fails the test case "Test repo.anyrevs with customized revset overrides" (line 1609) if the environment variable P is set. The test implicitly expects that the environment, in which it is started, does not export the variable 'P'. To solve this issue, unset 'P' right before the test commands are run. Differential Revision: https://phab.mercurial-scm.org/D6195

hgmanpage: use a py2 and py3 compatible iterable protocol

hgmanpage: use range instead of xrange

packaging: allow to run make with python3 Use "?=", otherwise the variable cannot be set from environment.

cleanup: use set literals where possible Differential Revision: https://phab.mercurial-scm.org/D6192

tests: rename "u" to more usual "ui" in test-context.py Differential Revision: https://phab.mercurial-scm.org/D6191

tests: better document the graft copy case Differential Revision: https://phab.mercurial-scm.org/D6190

py2exe: add workaround to allow bundling of hgext3rd.* extensions py2exe doesn't know how to handle namespace packages *at all*, so it treats them like normal packages. As a result, if we try and bundle hgext3rd.evolve in a py2exe build, it won't work if we install evolve into the virtualenv. In order to work around this, tortoisehg installs hgext3rd.evolve etc into its staged hg directory, since it doesn't use a virtualenv. As a workaround for us, we'll just allow any extra packages users want bundled are part of hg during the pseudo-install phase that py2exe uses. I'm not happy about this, but it *works*. As a sample of how you'd make an MSI with evolve bundled: import os import shutil import subprocess import tempfile def stage_evolve(version): """Stage evolve for inclusion in py2exe binary.""" with tempfile.TemporaryDirectory() as temp: evolve = os.path.join(temp, "evolve") subprocess.check_call([ "hg.exe", "clone", "https://www.mercurial-scm.org/repo/evolve/", "--update", version, evolve, ]) dest = os.path.join('..', 'hgext3rd', 'evolve') if os.path.exists(dest): shutil.rmtree(dest) shutil.copytree(os.path.join(evolve, "hgext3rd", "evolve"), dest) def main(): stage_evolve('tip') print("\0") print("hgext3rd") print("hgext3rd.evolve") print("hgext3rd.evolve.hack") print("hgext3rd.evolve.thirdparty") if __name__ == "__main__": main() is a script you can pass to the wix/build.py as --extra-packages-script, and the resulting .msi will have an hg binary with evolve baked in. users will still need to enable evolve in their hgrc, so you'd probably also want to bundle configs in your msi for an enterprise environment, but that's already easy to do with the support for extra features and wxs files in the wix build process. Differential Revision: https://phab.mercurial-scm.org/D6189

wix: fix the package build when not adding features Should have used ifdef, not if. Sigh. Differential Revision: https://phab.mercurial-scm.org/D6187

histedit: narrow the scope of discarded ui output In 34165875fa5df813bec3a0cd348932b304d44efb, a lot of the output from histedit was excluded. This slightly adjusts the scope of that exclusion, to both discard more uninsteresting messages, and ensure that pre-merge-tool output gets shown before the external merge tool is executed. Differential Revision: https://phab.mercurial-scm.org/D6177

uncommit: abort if an explicitly given file cannot be uncommitted (BC) I've gotten burned several times by this in the last few days. The former tests look simple enough, but if a good file and a bad file are given, the bad files are silently ignored. Some commands like `forget` will warn about bogus files, but that would likely get lost in the noise of an interactive uncommit. The commit command aborts if a bad file is given, so this seems more consistent for commands that alter the repository.

unshelve: disable unshelve during merge (issue5123) As stated in the issue5123, unshelve can destroy the second parent of the context when tried to unshelve with an uncommitted merge. This patch makes unshelve to abort when called with an uncommitted merge. See how shelve.mergefiles works. Commit structure looks like this: ``` ... -> pctx -> tmpwctx -> shelvectx / / second merge parent pctx = parent before merging working context(first merge parent) tmpwctx = commited working directory after merge(with two parents) shelvectx = shelved context ``` shelve.mergefiles first updates to pctx then it reverts shelvectx to pctx with: ``` cmdutil.revert(ui, repo, shelvectx, repo.dirstate.parents(), *pathtofiles(repo, files), **{'no_backup': True}) ``` Reverting tmpwctx files that were merged from second parent to pctx makes them added because they are not in pctx. Changing this revert operation is crucial to restore parents after unshelve. This is a complicated issue as this is not fixing a regression. Thus, for the time being, unshelve during an uncommitted merge can be aborted. (Details taken from http://mercurial.808500.n3.nabble.com/PATCH-V3-shelve-restore-parents-after-unshelve-issue5123-tt4036858.html#a4037408) Differential Revision: https://phab.mercurial-scm.org/D6169

wix: add functionality to inject additional Features into installer This is the last bit required to be able to glue extra configs etc into the installer. Differential Revision: https://phab.mercurial-scm.org/D6180

wix: add support for additional wxs files As with my previous change for an --extra-prebuiild-script, I'm assuming this is predominantly useful in an enterprise environment and am only adding this to wix and not also to inno install scripts. Differential Revision: https://phab.mercurial-scm.org/D6179

wix: add a hook for a prebuild script to inject extra libraries I need this to build packages for Google so we can bundle some extensions in the installed image. My assumption is that this is most interesting for the .msi images so I only wired it up there. I'm not thrilled with the interface this provides, but it was an easy way to retain debug messages on Windows while also having enough structure to know what lines are actually module names for py2exe. Still pending on my end: I need to bundle a couple of config files, and at least one data file. I'm open to advice on how to do those things, and how to do this better. Differential Revision: https://phab.mercurial-scm.org/D6164

compression: introduce an official `format.revlog-compression` option This option supersedes the `experiment.format.compression` option. The value currently supported are zlib (default) and zstd (if Mercurial was compiled with zstd support). The option gained an explicit reference to `revlog` since this is the target usage here. Different storage methods might require different compression strategies. In our tests, using zstd give a significant CPU usage improvement (both compression and decompressing) while keeping similar repository size. Zstd as other interresting mode (dictionnary, pre-text, etc…) that are probably worth exploring. However, just plain switching from zlib to zstd provide a large benefit.

compression: display compression level in debugformat Now that we have options to control the compression level, we teach `hg debugformat` about them. This is a useful information when comparing repositories. Note that we have no trace of the compression level used to store existing deltas. Actually, it would even varies from one delta to another. So we display the currently set value.

compression: introduce a `storage.revlog.zstd.level` configuration This option control the zstd compression level used when compressing revlog chunk. The usage of zstd for revlog compression has not graduated from experimental yet, but we intend to fix that soon. The option name for the compression level is more straight forward to pick, so this changesets comes first. Having a dedicated option for each compression engine is useful because they don't support the same range of values. I ran the same measurement as for the zlib compression level (in the parent changesets). The variation in repository size is stay mostly in the same (small) range. The "read/write" performance see smallish variation, but are overall much better than zlib. Write performance show the same tend of having better write performance for when reaching high-end compression. Again, we don't intend to change the default zstd compression level (currently: 3) in this series. However this is worth investigating in the future. The Performance comparison of zlib vs zstd is quite impressive. The repository size stay in the same range, but the performance are much better in all situations. Comparison summary ================== We are looking at: - performance range for zlib - performance range for zstd - comparison of default zstd (level-3) to default zlib (level 6) - comparison of the slowest zstd time to the fastest zlib time Read performance: ----------------- | zlib | zstd | cmp | f2s mercurial | 0.170159 - 0.189219 | 0.144127 - 0.149624 | 80% | 88% pypy | 2.679217 - 2.768691 | 1.532317 - 1.705044 | 60% | 63% netbeans | 122.477027 - 141.620281 | 72.996346 - 89.731560 | 58% | 73% mozilla | 147.867662 - 170.572118 | 91.700995 - 105.853099 | 56% | 71% Write performance: ------------------ | zlib | zstd | cmp | f2s mercurial | 53.250304 - 56.2936129 | 40.877025 - 45.677286 | 75% | 86% pypy | 460.721984 - 476.589918 | 270.545409 - 301.002219 | 63% | 65% netbeans | 520.560316 - 715.930400 | 370.356311 - 428.329652 | 55% | 82% mozilla | 739.803002 - 987.056093 | 505.152906 - 591.930683 | 57% | 80% Raw data -------- repo alg lvl .hg/store size 00manifest.d read write mercurial zlib 1 49,402,813 5,963,475 0.170159 53.250304 mercurial zlib 6 47,197,397 5,875,730 0.182820 56.264320 mercurial zlib 9 47,121,596 5,849,781 0.189219 56.293612 mercurial zstd 1 49,737,084 5,966,355 0.144127 40.877025 mercurial zstd 3 48,961,867 5,895,208 0.146376 42.268142 mercurial zstd 5 48,200,592 5,938,676 0.149624 43.162875 mercurial zstd 10 47,833,520 5,913,353 0.145185 44.012489 mercurial zstd 15 47,314,604 5,728,679 0.147686 45.677286 mercurial zstd 20 47,330,502 5,830,539 0.145789 45.025407 mercurial zstd 22 47,330,076 5,830,539 0.143996 44.690460 pypy zlib 1 370,830,572 28,462,425 2.679217 460.721984 pypy zlib 6 340,112,317 27,648,747 2.768691 467.537158 pypy zlib 9 338,360,736 27,639,003 2.763495 476.589918 pypy zstd 1 362,377,479 27,916,214 1.532317 270.545409 pypy zstd 3 354,137,693 27,905,988 1.686718 294.951509 pypy zstd 5 342,640,043 27,655,774 1.705044 301.002219 pypy zstd 10 334,224,327 27,164,493 1.567287 285.186239 pypy zstd 15 329,000,363 26,645,965 1.637729 299.561332 pypy zstd 20 324,534,039 26,199,547 1.526813 302.149827 pypy zstd 22 324,530,595 26,198,932 1.525718 307.821218 netbeans zlib 1 1,281,847,810 165,495,457 122.477027 520.560316 netbeans zlib 6 1,205,284,353 159,161,207 139.876147 715.930400 netbeans zlib 9 1,197,135,671 155,034,586 141.620281 678.297064 netbeans zstd 1 1,259,581,737 160,840,613 72.996346 370.356311 netbeans zstd 3 1,232,978,122 157,691,551 81.622317 396.733087 netbeans zstd 5 1,208,034,075 160,246,880 83.080549 364.342626 netbeans zstd 10 1,188,624,176 156,083,417 79.323935 403.594602 netbeans zstd 15 1,176,973,589 153,859,477 89.731560 428.329652 netbeans zstd 20 1,162,958,258 151,147,535 82.842667 392.335349 netbeans zstd 22 1,162,707,029 151,150,220 82.565695 402.840655 mozilla zlib 1 2,775,497,186 298,527,987 147.867662 751.263721 mozilla zlib 6 2,596,856,420 286,597,671 170.572118 987.056093 mozilla zlib 9 2,587,542,494 287,018,264 163.622338 739.803002 mozilla zstd 1 2,723,159,348 286,617,532 91.700995 570.042751 mozilla zstd 3 2,665,055,001 286,152,013 95.240155 561.412805 mozilla zstd 5 2,607,819,817 288,060,030 101.978048 505.152906 mozilla zstd 10 2,558,761,085 283,967,648 104.113481 497.771202 mozilla zstd 15 2,526,216,060 275,581,300 105.853099 591.930683 mozilla zstd 20 2,485,114,806 266,478,859 95.268795 576.515389 mozilla zstd 22 2,484,869,080 266,456,505 94.429282 572.785537

compression: introduce a `storage.revlog.zlib.level` configuration This option control the zlib compression level used when compression revlog chunk. This is also a good excuse to pave the way for a similar configuration option for the zstd compression engine. Having a dedicated option for each compression algorithm is useful because they don't support the same range of values. Using a higher zlib compression impact CPU consumption at compression time, but does not directly affected decompression time. However dealing with small compressed chunk can directly help decompression and indirectly help other revlog logic. I ran some basic test on repositories using different level. I am using the mercurial, pypy, netbeans and mozilla-central clone from our benchmark suite. All tested repository use sparse-revlog and got all their delta recomputed. The different compression level has a small effect on the repository size (about 10% variation in the total range). My quick analysis is that revlog mostly store small delta, that are not affected by the compression level much. So the variation probably mostly comes from better compression of the snapshots revisions, and snapshot revision only represent a small portion of the repository content. I also made some basic timings measurements. The "read" timings are gathered using simple run of `hg perfrevlogrevisions`, the "write" timings using `hg perfrevlogwrite` (restricted to the last 5000 revisions for netbeans and mozilla central). The timings are gathered on a generic machine, (not one of our performance locked machine), so small variation might not be meaningful. However large trend remains relevant. Keep in mind that these numbers are not pure compression/decompression time. They also involve the full revlog logic. In particular the difference in chunk size has an impact on the delta chain structure, affecting performance when writing or reading them. On read/write performance, the compression level has a bigger impact. Counter-intuitively, the higher compression levels improve "write" performance for the large repositories in our tested setting. Maybe because the last 5000 delta chain end up having a very different shape in this specific spot? Or maybe because of a more general trend of better delta chains thanks to the smaller chunk and snapshot. This series does not intend to change the default compression level. However, these result call for a deeper analysis of this performance difference in the future. Full data ========= repo level .hg/store size 00manifest.d read write ---------------------------------------------------------------- mercurial 1 49,402,813 5,963,475 0.170159 53.250304 mercurial 6 47,197,397 5,875,730 0.182820 56.264320 mercurial 9 47,121,596 5,849,781 0.189219 56.293612 pypy 1 370,830,572 28,462,425 2.679217 460.721984 pypy 6 340,112,317 27,648,747 2.768691 467.537158 pypy 9 338,360,736 27,639,003 2.763495 476.589918 netbeans 1 1,281,847,810 165,495,457 122.477027 520.560316 netbeans 6 1,205,284,353 159,161,207 139.876147 715.930400 netbeans 9 1,197,135,671 155,034,586 141.620281 678.297064 mozilla 1 2,775,497,186 298,527,987 147.867662 751.263721 mozilla 6 2,596,856,420 286,597,671 170.572118 987.056093 mozilla 9 2,587,542,494 287,018,264 163.622338 739.803002

compression: accept level management for zlib compression We update the zlib related class to be support setting the compression level. This changeset focus on updating the internal only. A way to configure this level will be introduced in the next changeset.

util: extract compression code in `mercurial.utils.compression` The code seems large enough to be worth extracting. This is similar to what was done for various module in `mercurial/utils/`. Since None of the compression logic takes a `ui` objet, issuing deprecation warning is tricky. Luckly the logic does not seems to have many external users.

merge: make "labels" argument to graft() optional, like it is for update() graft() just passes the argument on to update(), and update() doesn't require it, so graft() shouldn't either. Differential Revision: https://phab.mercurial-scm.org/D6175

revset: remove comment about linkrev workaround from user-facing docs I think the code is clear enough so we don't need to keep the comment at all (by now, most Mercurial developers are probably familiar with the linkrevs issues). Differential Revision: https://phab.mercurial-scm.org/D6176

shelve: let cmdutil.revert() take care of backing up untracked files cmdutil.revert() backs up untracked files, so I don't see a reason to do it shelve.mergefiles(). We have tests for this and they still pass. Differential Revision: https://phab.mercurial-scm.org/D6174

shelve: stop passing list of files to revert It seems to work just fine to not specify any files here. I suspect it looked the way it did for historical reasons. It apparently used to use merge instead of rebase until 1d7a36ff2615 (shelve: use rebase instead of merge (issue4068), 2013-10-23) and it makes sense to want to restrict the set of files then. I noticed this because of the files.extend(shelvectx.p1().files()). If the working copy was clean before, then shelvectx.p1() will be the working copy parent and that ended up adding all the files in that set. In our Google-internal Mercurial setup (including a FUSE) that was very noticeably slow when the working copy parent happened to have many files in large directories. This patch doesn't yet remove the call to shelvectx.p1().files(). We also use that set for deciding what to back up. I'm pretty sure it's safe to back up only the set of files we already back even if we no longer restrict the set of files to revert, so this patch should be safe on its own. Regardless, the next patch will delegate the backing-up to cmdutil.revert(). Incidentally, this also gets rid of a repo.pathto() that I had earlier wanted to get rid of. Differential Revision: https://phab.mercurial-scm.org/D6173

remotefilelog: prefetch files in deterministic order I have been troubleshooting some slowness in this area (it's unclear if it's the client or server that's to blame, but that's beside the point) and it's a lot easier to do troubleshoot if the files are prefetched in the same order each time. Differential Revision: https://phab.mercurial-scm.org/D6172

debugdiscovery: display time elapsed during the discovery step This is a useful information. Now that we perform more analysing after the discovery is done, it is worth have a more precise measurement. For serious timing analysis use `hg perfdiscovery`.

debugdiscovery: only list common heads on verbose The list of common heads is only part of the useful information. In addition on repository with many heads, the information is very not helpful (just fill a couple of screen with hash). As a result we hide it behind a --verbose flag.

debugdiscovery: drop duplicated information The old line informing about the local being a superset or subset of the remote is redundant with the newly introduced data. So we drop it.

debugdiscovery: display more statistic about the common set We display a lot more information now. Especially, we display the overlap between the common heads and the local/remote heads. There are various optimization geared toward heads, as a result, the less common the heads the more complex the discovery. Having this information easily accessible help when working on discovery.

debugdiscovery: small internal refactoring The part of the code displaying statistic is made independant from the one running the discovery. In the same do, the declaration of the discovery function is a bit simplified.

debugdiscovery: allow to select random seed during debugdiscovery run The randomness can lead to large timing difference, controling it is important.

discovery: move cl.hasnode outside of the for-loop IIUC, resolving attributes for changelog can lead to some overhead. So this patch moves that to outside of a for-loop. Differential Revision: https://phab.mercurial-scm.org/D6147

discovery: prevent deleting items from a dictionary Removing elements from Python dictionary is expensive. So let's prevent adding them instead. I added a newline to make code look a bit better. Differential Revision: https://phab.mercurial-scm.org/D6146

discovery: drop some unused sets Differential Revision: https://phab.mercurial-scm.org/D6145

discovery: prevent recomputing info about server and outgoing changesets We already iterate over the outgoing.missing above and lookup repo for them. So let's reuse info calculated at that time instead of recomputing that again. Also we calculate the set of remotebranches by doing set(remotemap), so let's reuse that again. Upcoming patches will clean things a bit more. Differential Revision: https://phab.mercurial-scm.org/D6144

crecord: draw on the whole screen When starting crecord, one can see that it has a small gap on the rightmost column which doesn't get used. This is in contrast to other interactive curses frontends such as chistedit. Disabling the displaying of the cursor allows drawing on the whole availabe area and thus some hacky code in align() could be removed. Differential Revision: https://phab.mercurial-scm.org/D6171

automation: perform tasks on remote machines Sometimes you don't have access to a machine in order to do something. For example, you may not have access to a Windows machine required to build Windows binaries or run tests on that platform. This commit introduces a pile of code intended to help "automate" common tasks, like building release artifacts. In its current form, the automation code provides functionality for performing tasks on Windows EC2 instances. The hgautomation.aws module provides functionality for integrating with AWS. It manages EC2 resources such as IAM roles, EC2 security groups, AMIs, and instances. The hgautomation.windows module provides a higher-level interface for performing tasks on remote Windows machines. The hgautomation.cli module provides a command-line interface to these higher-level primitives. I attempted to structure Windows remote machine interaction around Windows Remoting / PowerShell. This is kinda/sorta like SSH + shell, but for Windows. In theory, most of the functionality is cloud provider agnostic, as we should be able to use any established WinRM connection to interact with a remote. In reality, we're tightly coupled to AWS at the moment because I didn't want to prematurely add abstractions for a 2nd cloud provider. (1 was hard enough to implement.) In the aws module is code for creating an image with a fully functional Mercurial development environment. It contains VC9, VC2017, msys, and other dependencies. The image is fully capable of building all the existing Mercurial release artifacts and running tests. There are a few things that don't work. For example, running Windows tests with Python 3. But building the Windows release artifacts does work. And that was an impetus for this work. (Although we don't yet support code signing.) Getting this functionality to work was extremely time consuming. It took hours debugging permissions failures and other wonky behavior due to PowerShell Remoting. (The permissions model for PowerShell is crazy and you brush up against all kinds of issues because of the user/privileges of the user running the PowerShell and the permissions of the PowerShell session itself.) The functionality around AWS resource management could use some improving. In theory we support shared tenancy via resource name prefixing. In reality, we don't offer a way to configure this. Speaking of AWS resource management, I thought about using a tool like Terraform to manage resources. But at our scale, writing a few dozen lines of code to manage resources seemed acceptable. Maybe we should reconsider this if things grow out of control. Time will tell. Currently, emphasis is placed on Windows. But I only started there because it was likely to be the most difficult to implement. It should be relatively trivial to automate tasks on remote Linux machines. In fact, I have a ~1 year old script to run tests on a remote EC2 instance. I will likely be porting that to this new "framework" in the near future. # no-check-commit because foo_bar functions Differential Revision: https://phab.mercurial-scm.org/D6142

contrib: PowerShell script to install development dependencies Configuring a Windows machine to hack on Mercurial is a bit of work and it isn't documented very well. This commit introduces a PowerShell script to automate going from a fresh Windows install to an environment suitable for building Mercurial, its installers, and running tests. Differential Revision: https://phab.mercurial-scm.org/D6141

chistedit: change in-progress message Saying "running histedit" is an artifact of when chistedit was a separate thing from histedit. I found the message a bit confusing, since wasn't I running histedit from the beginning, just from the curses interface? The whole thing is now histedit, both the curses interface and the underlying procedure to apply a plan, so let's use a message that doesn't make a distinction.

perf: copyedit a few documentation strings Differential Revision: https://phab.mercurial-scm.org/D6170

shelve: add --keep to list of allowables

perf: introduce a `perf.run-limits` options This options make it possible to configure the number of run that the extensions will perform. This is useful for automated benchmark or for performance measurement that need better accuracy.

perf: pass limits as a function argument The function applying the limit has no access to the configuration. Therefore, some higher layer will have to pass it as argument. We do this in an independent change to clarify the next change.

perf: more flexible implementation for checking stop conditions We want to make this logic simpler to configure. The first step is to stop hard-coding every values.

perf: document perfparents

perf: document config options We have configuration, so we better document it.

tests: use "perf" as a the extension name in test-contrib-perf.t This is simpler and seems more "inline" with the name people usually use for this extensions.

shelve: do not update when keeping changes, just move the dirstate This is to leave the working directory unchanged. We reuse the match object as an optimisation.

shelve: refactor _shelvecreatedcommit's match object into calling site We might need to use this match object again to move the dirstate in case the user requested to `--keep` the changes.

shelve: new keep option Does nothing yet. The docstring describes what it will soon be doing.

diff: support diffing explicit files in subrepos Most other commands support implied recursion based on file names already.

fix: make the order of the work queue deterministic This makes any output generated during the parallel phase of execution stable if parallelism is disabled. This helps write tests like that in the future. Differential Revision: https://phab.mercurial-scm.org/D6166

fix: allow fixing untracked files when given as arguments It's more useful to fix the file than to silently avoid it when the user does this: hg fix --working-dir untracked-file We will still do nothing to ignored files, even if they are specified. This may be safer, given that such files can unexpectedly slip into the arguments via a shell glob or fileset. Differential Revision: https://phab.mercurial-scm.org/D6165

branchcache: have a hasnode function to validate nodes Upcoming patches will delay node validation until it's required. So we need to a way in branchcache class to check whether a node exists or node. Other options were making repo or changelog an attribute of branchcache object. But the branchcache depends on filters so I decided to pass a function object. Differential Revision: https://phab.mercurial-scm.org/D6157

branchcache: add attributes to track which nodes are verified Half of the cost of loading branchcache comes from verifiying all the nodes it has. We don't need to verify all the nodes in all the cases. Sometimes we need to verify only a set of nodes for a set of branches. We can ignore nodes of other branches as we are not going to read them. This patch introduces two attributes to branchcache class. _verifiedbranches is a set which will tell the branches for which it's head nodes are verified. _closedverified is a boolean which will tell whether all closednodes are verified or not. Another idea which I had was to keep a set of nodes which are verified, but it will be more ugly and difficult to track things on node level. Differential Revision: https://phab.mercurial-scm.org/D6156

branchcache: make entries a private attribute Differential Revision: https://phab.mercurial-scm.org/D6155

branchcache: introduce hasbranch() This will be used to check whether a branch exists or not. This will optimized in future. Differential Revision: https://phab.mercurial-scm.org/D6154

branchmap: drop branchcache.setdefault() (API) All the callers are updated to call setdefault of branchcache.entries Differential Revision: https://phab.mercurial-scm.org/D6153

branchcache: rename itervalues() to iterheads() The itervalues() exists because branchcache() had a dict interface. Since it no longer has a dict interface, it makes sense to have better function names. If a person does not understand how branchcache stores info, it will be hard for them to guess what itervalues() does. Differential Revision: https://phab.mercurial-scm.org/D6152

branchmap: remove the dict interface from the branchcache class (API) The current branchmap computation involves reading the whole branchmap from disk, validating all the nodes even if they are not required. This leads to a lot of time on repos which have large branchmap or a lot of branches. On large repos, this can validate around 1000's of nodes. On some operations, like finding whether a branch exists or not, we don't need to validate all the nodes. Or updating heads for a single branch. Before this patch, branchcache class was having dict interface and it was hard to keep track of reads. This patch removes the dict interface. Upcoming patches will implement lazy loading and validation of data and implement better API's. Differential Revision: https://phab.mercurial-scm.org/D6151

test-template: fix stdio mode on Windows Otherwise, CBOR data would be corrupted. Spotted by Matt Harbison.

samplehgrcs: update the list of suggested extensions Back in the day, this was color and pager, both of which are now default. Churn isn't that popular, but the other four below (obviously?) are.

samplehgrcs: clarify which lines should be uncommented The original wording has confused at least one person. Hopefully it's clearer this way. https://stackoverflow.com/questions/55288177/adding-hg-strip-to-hgrc-config-file

templatefilters: add {x|cbor} filter for custom CBOR output

template: add CBOR output format The whole output is wrapped as an array just like the other serialization formats. It's an indefinite-length array since the size is unknown while encoding. Maybe we can add 'cbor-stream' (and 'pickle-stream') as needed.

memfilectx: override copysource() instead of using dummy nodeid The "_copied" property in basefilectx is used by renamed() and copysource(). committablefilectx (which memfilectx subclasses) overrides renamed() and writes it in terms of copysource() instead of _copied. That means that the nodeid part of "_copied" is memfilectx is unused. Let's instead override copysource() too so we don't need the "_copied". Differential Revision: https://phab.mercurial-scm.org/D6159

memctx: rename constructor argument "copied" to "copysource" (API) It's just the path, not the nodeid, so "copysource" seems more appropriate. Differential Revision: https://phab.mercurial-scm.org/D6158

crecord: redraw the screen when starting up chunkselector Failure to do this can cause screen corruption like: <headerline> [X] filename.cc <several blank lines> <output from previous iteration of split that happened to be here> I believe this might only happen in some terminals, and maybe only when using the "alternate screen". Regardless of the exact conditions to reproduce, it should be safe to always clear it when starting up and is probably the correct thing to do anyway :) Differential Revision: https://phab.mercurial-scm.org/D6131

crecord: redraw the screen on ctrl-L This is the normal use of Ctrl-L, so I think this is going to be what most people expect it to do. We're keeping the adjustment of what line we're scrolled to as well. I believe both to be necessary to handle otherwise inescapable situations when we've got screen corruption or edge-cases during window resizing. Differential Revision: https://phab.mercurial-scm.org/D6130

crecord: completely redraw screen when coming back from editor Differential Revision: https://phab.mercurial-scm.org/D6129

tests: glob seconds in test-upgrade-repo.t I had the test failing locally for me with diff showing `1.4s` instead of 0.0s Differential Revision: https://phab.mercurial-scm.org/D6161

store: recommend using `hg debugrebuildfncache` is fncache is corrupted Differential Revision: https://phab.mercurial-scm.org/D6160

debugsparse: abort if the repository is not sparse instead of ui.status() This is similar to what narrow extension does. Differential Revision: https://phab.mercurial-scm.org/D6149

revert: option to choose what to keep, not what to discard I know the you (the reader) are probably tired of discussing how `hg revert -i -r .` should behave and so am I. And I know I'm one of the people who argued that showing the diff from the working copy to the parent was confusing. I think it is less confusing now that we show the diff from the parent to the working copy, but I still find it confusing. I think showing the diff of hunks to keep might make it easier to understand. So that's what this patch provides an option for. One argument doing it this way is that most people seem to find `hg split` natural. I suspect that is because it shows the forward diff (from parent commit to the commit) and asks you what to put in the first commit. I think the new "keep" mode for revert (this patch) matches that. In "keep" mode, all the changes are still selected by default. That means that `hg revert -i` followed by 'A' (keep all) (or 'c' in curses) will be different from `hg revert -a`. That's mostly because that was simplest. It can also be argued that it's safest. But it can also be argued that it should be consistent with `hg revert -a`. Note that in this mode, you can edit the hunks and it will do what you expect (e.g. add new lines to your file if you added a new lines when editing). The test case shows that that works. Differential Revision: https://phab.mercurial-scm.org/D6125

patch: include newline at EOF in help text for interactive patch The lack of a newline means that some "editors" that are useful in tests, such as `echo "+new line" >> "$1"` don't work. It's obviously easy to work around it, but newline at EOF seems like a good practice anyway. Differential Revision: https://phab.mercurial-scm.org/D6124

merge with stable

Added signature for changeset 4ea21df312ec

Added tag 4.9.1 for changeset 4ea21df312ec

patch: include flag-only file changes in "special" when filtering (issue5864) This patch fix the issue5864 (or maybe issue5865 too) which occurs during split (or I should say at the time of filtering the hunks in interactive mode) where user hits a not ending loop of "no changes to record". And it's not only the case for split it will happen in every interactive case for e.g. `hg commit -i` or `hg uncommit -i` After looking into code I found that when filtering we have some notation called "special" for the file headers which doesn't contain any hunk and just contain the header (for e.g. newly added empty file or deleted file) where the user cannot change the content of operation. And I think we can put this "flag-only" file change in that same bucket of "special". But I doubt a bit about the case when a file have flag change and atleast one hunk then user won't be able to separate the flag change from hunks. Changed test file reflect the fixed behaviour. Differential Revision: https://phab.mercurial-scm.org/D6058

store: error out if fncache does not ends with a newline If fncache does not ends with a newline, chunk will not be fully consumed. It should be a bug somewhere or the fncache is corrupted if that happens. Let's error out in such cases. Differential Revision: https://phab.mercurial-scm.org/D6148

tracked: add documentation about `--import-rules` flag The documentation is inspired from the `--import-rules` flag of hg debugsparse command. Differential Revision: https://phab.mercurial-scm.org/D6150

discovery: fix embarrassing typo in slice definition The code introduced in e514799e4e07 ended up having a silly bug. The indexing selected a single item slice picking only p1. The discovery result was still correct, but the sampling was hampered, sometime leading to much more round trips being performed. Fixing this issue restore the previous sampling behavior. This fix has a negative performance impact on the pathological case the previous test has been built. # parent of this changesets ! wall 5.313884 comb 5.310000 user 5.260000 sys 0.050000 (best of 5) ! wall 6.711860 comb 6.710000 user 6.670000 sys 0.040000 (max of 5) ! wall 5.844016 comb 5.842000 user 5.784000 sys 0.058000 (avg of 5) ! wall 5.778635 comb 5.780000 user 5.740000 sys 0.040000 (median of 5) # With this changesets. ! wall 6.350879 comb 6.350000 user 6.300000 sys 0.050000 (best of 5) ! wall 6.653647 comb 6.660000 user 6.480000 sys 0.180000 (max of 5) ! wall 6.492762 comb 6.494000 user 6.414000 sys 0.080000 (avg of 5) ! wall 6.547577 comb 6.550000 user 6.490000 sys 0.060000 (median of 5) Changeset e514799e4e07 raised the question of using the "_uncheckedparentrevs" instead of the current code. So I ran comparative timing: # old code: 55919b96c02a (e514799e4e07 parent) ! wall 64.078708 comb 64.080000 user 63.160000 sys 0.920000 (best of 5) ! wall 68.296300 comb 68.290000 user 67.410000 sys 0.880000 (max of 5) ! wall 65.899075 comb 65.894000 user 65.082000 sys 0.812000 (avg of 5) ! wall 66.140286 comb 66.130000 user 65.330000 sys 0.800000 (median of 5) # buggy code: e514799e4e07 ! wall 46.605362 comb 46.610000 user 45.880000 sys 0.730000 (best of 5) ! wall 48.619659 comb 48.620000 user 47.890000 sys 0.730000 (max of 5) ! wall 47.350247 comb 47.350000 user 46.672000 sys 0.678000 (avg of 5) ! wall 46.983224 comb 46.980000 user 46.350000 sys 0.630000 (median of 5) # fixed code: e514799e4e07 with this fix ! wall 55.858460 comb 55.850000 user 55.090000 sys 0.760000 (best of 5) ! wall 59.048805 comb 59.060000 user 58.110000 sys 0.950000 (max of 5) ! wall 57.192639 comb 57.192000 user 56.350000 sys 0.842000 (avg of 5) ! wall 57.056373 comb 57.060000 user 56.160000 sys 0.900000 (median of 5) # version using uncheckedparents ! wall 56.471916 comb 56.470000 user 55.630000 sys 0.840000 (best of 5) ! wall 58.228793 comb 58.230000 user 57.600000 sys 0.630000 (max of 5) ! wall 57.377583 comb 57.378000 user 56.674000 sys 0.704000 (avg of 5) ! wall 57.008843 comb 57.010000 user 56.330000 sys 0.680000 (median of 5) So it looks like the overhead from `_uncheckedparentrevs` is not that impactful. I'll investigate this shortly. I'm almost done updating our benchmark suite with more meaningful discovery cases.

store: don't read the whole fncache in memory In large repositories with lot of files, the fncache grows more than 100 MB and reading that whole thing into memory slows things down. Let's not read the whole thing into memory. This patch changes fncache loading code to read 1 MB at once. Loading 1 MB at once saves ~1 sec on perffncacheload for our internal repository. I tried various values such as 0.5 MB, 5 MB, 10 MB but best results were produced using 1 MB as the chunksize. On a narrow clone with fncache around 40 MB, this patch saves ~0.04 seconds on average on perffncacheload. To test the code, I have coded an extension in test-fncache.t which set chunksize to 1 byte, and the test passes with that. Differential Revision: https://phab.mercurial-scm.org/D5296

record: prevent commits that don't pick up dirty subrepo changes (issue6102) This path covers interactive mode for commit, amend, and shelve, as well as the deprecated record extension. Since shelf creation uses commit without -S in the non-interactive case, aborting here should be OK. (I didn't check what happens to non interactive shelve creation if `ui.commitsubrepos=True` is set.) subrepoutil.precommit() will abort on a dirty subrepo if the config option isn't set, but the hint recommends using --subrepos to commit. Since only the commit command currently supports that option, the error has to be raised here to omit the hint. Doing the check before asking about all of the hunks in the MQ test seems like an improvement on its own. There's probably an additional check on this path that can be removed.

wix: restore COPYING.rtf 8427fea04017 accidentally blew away the content of this file. As part of restoring the content, I updated the copyright year to 2019. Differential Revision: https://phab.mercurial-scm.org/D6098

test-https: add some more known failure messages of client certs (issue6030) I don't think the exact error message is important here. On Debian sid, ECONNRESET is raised, and "[SSL] tlsv13 alert certificate required" on NetBSD.

test-https: turn off system OpenSSL configuration This mostly fixes the test failure on Debian sid where TLS 1.0 and 1.1 are disabled by default. https://sources.debian.org/patches/openssl/1.1.1a-1/Set-systemwide-default-settings-for-libssl-users.patch/ $OPENSSL_CONF could be set by run-tests.py, but the other tests should work without a "legacy" TLS, so I decided to not.

store: move logic to check for invalid entry in fncache to own function This helps separate the original reading logic from the one which finds for an invalid entry. Differential Revision: https://phab.mercurial-scm.org/D6030

py3: add test-phabricator.py to python3-whitelist Differential Revision: https://phab.mercurial-scm.org/D6114

py3: convert to/from bytes/unicode for json.(dump|load)s in debugcallconduit Differential Revision: https://phab.mercurial-scm.org/D6113

py3: use pycompat.byteskwargs on opts in phabricator.py Differential Revision: https://phab.mercurial-scm.org/D6107

watchman: ignore some of watchman errors Don't display 'illegal_fstypes' errors. In environments with network filesystems, the error messages are quickly pilling up and polluting outputs. Differential Revision: https://phab.mercurial-scm.org/D5955

watchman: add the possibility to set the exact watchman binary location This is necessary to make rolling releases of new watchman versions across users. Differential Revision: https://phab.mercurial-scm.org/D5954

context: use wdirhex constant instead of calculating it Differential Revision: https://phab.mercurial-scm.org/D6143

split: use the new movedirstate() we now have in scmutil This avoids unnecessarily touching the working copy when splitting the parent of the working copy. That also makes the test-removeemptydirs.t case invalid, so we can just delete it. Differential Revision: https://phab.mercurial-scm.org/D6127

manifestcache: use `wcache` directory for manifest cache The manifest full text cache is tightly related to the working copy. We should use the `wcache` directory for it, instead of the `cache`. Otherwise, multiple shares would keep overwriting each other cache entry and we loose its benefit. This is also more consistent with the fact this cache file is protected by `wlock`.

manifestcache: protect write with `wlock` instead of `lock` The `wlock` is taken by both `update` and `commit` type operation. This would help persisting the cache more aggressively. An explicit test is introduced. However, we can already see the effect of this change on earlier test output.

manifestcache: clear the cache before testing the debug command Right now the cache is empty before this section of the test. However, we are about to improve the persistence of the cache (putting it under `wllock`, intead of `lock`). So we install the cleanup before.

manifestcache: abstract the filename in a class attribute This make the code clearer and simpler to update.

manifestcache: skip setup earlier if we don't have the lock There a no point preparing a closure if we are not going to use it.

manifestcache: test the cache is warm after a commit

manifestcache: stop altering the lru cache order while displaying it Accessing value with `.get` alter the iteration order and make the output of the debug command misbehave, showing multiple entry twice. We need more than 2 entry to see the bug, so there are not test change. Later test will introduce a third entry and would fail without this fix.

manifestcache: support multiple cache addition in one debug command run This is more practical.

wix: autogenerate wxs file for library files Currently, dist.wxs contains an enumeration of .pyd and .dll files staged to dist/lib by py2exe. Having a manual list of files is error prone, as things can easily get out of sync (as the previous commit demonstrates). This is especially an issue for TortoiseHG, which ships a number of custom modules, which may pull in additional dependencies. Let's prevent this problem from manifesting by dynamically generating a .wxs file containing the .pyd and .dll files staged by py2exe. Differential Revision: https://phab.mercurial-scm.org/D6139

wix: introduce variable to hold path to wix packaging directory For convenience. Differential Revision: https://phab.mercurial-scm.org/D6138

wix: package missing .dll and .pyd files dist.wxs is currently missing some .pyd and .dll files which are picked up and staged by py2exe. This means that the WiX installer is missing some Python extension modules and their dependencies which are referenced by Mercurial or a Python package distributed with it. This commit adds the missing files to the WiX installer. Differential Revision: https://phab.mercurial-scm.org/D6137

setup: exclude crypt32.dll in py2exe builds py2exe is picking up crypt32.dll as a dependency and is including the DLL in the dist/lib directory, where it can get picked up by an installer and distributed. crypt32.dll is a core Windows DLL since Windows XP. We don't need to distribute it. Differential Revision: https://phab.mercurial-scm.org/D6136

packaging: don't bundle DLLs in py2exe library.zip for x86 builds I had ported the x86/x64 behavior difference from the Inno Setup installer files. Why things were this way, I'm not sure. The WiX configuration files are expecting to have standalone DLL files for both configurations. And the 32-bit WiX installers were broken due to missing DLLs. Let's standardize on standalone DLL files on all configurations for consistency. I /think/ this will be faster, as I /think/ py2exe binaries would have to extract the DLL to a temporary file in order to load it. But I'm not 100% sure about that. Differential Revision: https://phab.mercurial-scm.org/D6135

packaging: convert files to LF My editor accidentally wrote CRLF line endings because I authored this code on Windows. Derp. I'm kinda surprised no linters caught this... # no-check-commit to avoid false positive for foo_bar names Differential Revision: https://phab.mercurial-scm.org/D6134

dirstate: remove obsolete reference to dirstate.beginparentchange The only valid API since 265e91da56fd (dirstate: drop deprecated methods (API), 2018-02-02) is the context manager returned from dirstate.parentchange(). Differential Revision: https://phab.mercurial-scm.org/D6126

py3: use pycompat.iterbytestr to convert memoryview slice to bytestring Otherwise ch is the int value of the byte in py3 rather than the actual character. Differential Revision: https://phab.mercurial-scm.org/D6103

rebase: fix crash with in-memory rebase and copies When using regular on-disk rebase, filectx.markcopies() calls to dirstate.copy(), which happily records the copy. Then it's simply ignored if it doesn't matter for the commit (as in the test case I added in the previous patch). Let's do the same for overlayworkingctx. Differential Revision: https://phab.mercurial-scm.org/D6133

test: demonstrate crash with in-memory rebase and copies In the added test case, there is a merge commit that has one obsolete parent with a rename. Since the rename is not in the other parent, pathcopies() from that other parent will include the copy. Then when we try to rebase this merge commit onto another commit that has the same content changes, but no tracking of the rename (because it was done with "hg remove; hg add" instead of "hg mv"), we try to propagate the copy information. That fails because overlayworkingctx expects a file to be modified if it's going to have copy information. Differential Revision: https://phab.mercurial-scm.org/D6132

manifestcache: actually honor --clear Before this change, the --clear flag was not clearing the on disk cache. (We also remove the extra verbosity when using --clear. Same as what we did for --add)

manifestcache: make sure the entry are ordered by access time This is an LRU cache, let us make sure of that.

manifestcache: adding a second distinct entry Let makes sure the cache can hold multiple value.

manifestcache: test that adding the same entry twice do not duplicates it Simple sanity check.

manifestcache: do not display data when using --add If the command invocation is about adding a new entry, we should remain terse (the same as we do for many commands).

manifestcache: only lock the repository if the debug command touch the cache Not doing so had two consequences: 1) the command cannot be run on read only repositories, 2) when using --add on an empty cache, the command crash prematurely trying to read the cache file on disk.

manifestcache: further fix to debug command output Removing more capital letters. The output will get a test once other issues get fixed.

manifestcache: test and fix some output of the debug command The message was lacking an end of line. In addition we do not capitalize output in Mercurial.

chunkselector: fix typos in instructions when user reviews patch Differential Revision: https://phab.mercurial-scm.org/D6121

scmutil: document matcher argument of movedirstate() Differential Revision: https://phab.mercurial-scm.org/D6120

uncommit: move _movedirstate() to scmutil for reuse The function should be applicable generically when moving from one commit to another. I'll try to add more callers when I find time. I'm not convinced it's handling all the cases correctly, but we should have a generic function for this kind of operation, so I think it belongs somewhere in core (not in the uncommit extension). Differential Revision: https://phab.mercurial-scm.org/D6119

copies: remove dependency on scmutil by directly using match.exact() I want to add a dependency from scmutil.copies(), so I need to remove this dependency first. Differential Revision: https://phab.mercurial-scm.org/D6118

uncommit: convert _fixdirstate() into _movedirstate() _fixdirstate() already also updates to the given commit, so let's rename it to _movedirstate(). Also update the documentation and drop the unnecessary "curctx" argument, since that should always be repo['.']. Differential Revision: https://phab.mercurial-scm.org/D6117

updatecaches: also warm the tags caches Resolving any name requires the tags cache to be warm. We make sure that `hg debugupdatecache` warm the tag cache entry too.

updatecaches: also warm revbranchcache for filtered revisions We are in the "full" case, so we better warm everything we can.

copies: handle a case when both merging csets are not descendant of merge base This patch fix the behaviour of fullcopytracing algorithm in the case when both the merging csets are not the descendant of merge base. Although it seems to be the rare case when both the csets are not descendant of merge base. But it can be seen in most of cases of content-divergence in evolve extension, where merge base is the common predecessor. Previous patch added a test where this algorithm can fail to continue because of an assumption that only one of the two csets can be dirty. This patch fix that error. For refrence I suggest you to look into the previous discussion held on a patch sent by Pulkit: https://phab.mercurial-scm.org/D3896 Differential Revision: https://phab.mercurial-scm.org/D5963

copies: add test that makes both the merging csets dirty and fails This patch is a part of series which is about the case when both the merging csets are not descendant of merge base. The existing code assumes if c1 is dirty there shouldn't be any partial copies from c2 i.e both2['incomplete'] and same for c2, if c2 is dirty both1['incomplete'] should be empty, but this is not the right assumption. Now as we know we can have both c1 and c2 dirty at the same time, it is possible that c1 is dirty and both2['incomplete'] has some value. Or if c2 is dirty and both1['incomplete'] has some value. Added test shows that because of this assumption it could fail. Differential Revision: https://phab.mercurial-scm.org/D5962

copies: add test that makes both the merging csets dirty and run w/o error This series of patches is to cover a case in fullcopytracing algorithms where both the merging csets are not descendant of merge base. In this algorithm we call a merging cset "dirty" if that cset is not the descendant of merge base. That said, added test in this patch cover case when both the merging csets are "dirty". Actually this case of "both dirty" was encountered by Pulkit when he was working on content-divergence where it is possible that both the csets are not descendant of merging base. For reference you can look into: https://phab.mercurial-scm.org/D3896 As this test run fine without any error and correctly traced the copies, I added this test to make sure that it doesn't break even after I will modify some code in next patches to fix an error. Next patch adds the tests where this algorithm throws an error for the same case of "both dirty". Differential Revision: https://phab.mercurial-scm.org/D5961

tests: stabilize test-bundle.t on Windows Similar to 92055d539e49.

discovery-helper: use reflink copy if available A reflink copy will copy the files "as usual" but keep using the same data block underneath. This is only supported by "copy on write" file system like btrfs or zfs. This will achieve similar performance that the existing hardlink clone that Mercurial performs with the same initial space saving. However, it will behave better on revlogs start being touch by strip. Instead of duplicating all data in the touched revlogs, only the block actually affected by the strip will be duplicated. This save a lot of space when building many variants of large repositories. The --reflink=always flag make sure the `cp` call fails if reflink copies are not supported. Falling back to local clone.

discovery-helper: bail out if destination already exists

discovery-helper: move repository creation in a function This makes it easier to update this duplicated code. (we do a small output fix as we go)

discovery-helper: add an extra argument to generate only one repo This is useful to generate left and right in parallel when dealing with very large repositories.

wix: remove enum and future packages These were cargo culted from the THG installer code. I'm not sure what needs them in THG land. But the official MSIs certainly do not - at least not as direct dependencies. .. bc:: The Windows MSI installers no longer include the enum and future Python packages. Differential Revision: https://phab.mercurial-scm.org/D6101

wix: remove pywin32 This dependency was for ancient Mercurial versions. We recently removed it from the Inno Setup installers. So let's remove it from the WiX installers as well. .. bc:: The Windows MSI installers no longer include the pywin32 Python package. Differential Revision: https://phab.mercurial-scm.org/D6100

wix: remove sphinx and dependencies Sphinx was cargo culted into our install environment as part of emulating TortoiseHG's behavior. THG seems to install Sphinx in order to generate THG specific documentation. We don't appear to need Sphinx or any of its dependencies in the official WiX installers. So remove it. This shaves ~1MB off the size of the MSI installers. .. bc:: The Windows MSI installers no longer include the Python sphinx package and its various dependencies. Differential Revision: https://phab.mercurial-scm.org/D6099

wix: functionality to automate building WiX installers Like we did for Inno Setup, we want to make it easier to produce WiX installers. This commit does that. We introduce a new hgpackaging.wix module for performing all the high-level tasks required to produce WiX installers. This required miscellaneous enhancements to existing code in hgpackaging, including support for signing binaries. A new build.py script for calling into the module APIs has been created. It behaves very similarly to the Inno Setup build.py script. Unlike Inno Setup, we didn't have code in the repo previously to generate WiX installers. It appears that all existing automation for building WiX installers lives in the https://bitbucket.org/tortoisehg/thg-winbuild repository - most notably in its setup.py file. My strategy for inventing the code in this commit was to step through the code in that repo's setup.py and observe what it was doing. Despite the length of setup.py in that repository, the actual amount of steps required to produce a WiX installer is actually quite low. It consists of a basic py2exe build plus invocations of candle.exe and light.exe to produce the MSI. One rabbit hole that gave me fits was locating the Visual Studio 9 C Runtime merge modules. These merge modules are only present on your system if you have a full Visual Studio 2008 installation. Fortunately, I have a copy of Visual Studio 2008 and was able to install all the required updates. I then uploaded these merge modules to a personal repository on GitHub. That is where the added code references them from. We probably don't need to ship the merge modules. But that is for another day. The installs from the MSIs produced with the new automation differ from the last official MSI in the following ways: * Our HTML manual pages have UNIX line endings instead of Windows. * We ship modules in the mercurial.pure package. It appears the upstream packaging code is not including this package due to omission (they supply an explicit list of packages that has drifted out of sync with our setup.py). * We do not ship various distutils.* modules. This is because virtualenvs have a custom distutils/__init__.py that automagically imports distutils from its original location and py2exe gets confused by this. We don't use distutils in core Mercurial and don't provide a usable python.exe, so this omission should be acceptable. * The version of the enum package is different and we ship an enum.pyc instead of an enum/__init__.py. * The version of the docutils package is different and we ship a different set of files. * The version of Sphinx is drastically newer and we ship a number of files the old version did not. (I'm not sure why we ship Sphinx - I think it is a side-effect of the way the THG code was installing dependencies.) * We ship the idna package (dependent of requests which is a dependency of newer versions of Sphinx). * The version of imagesize is different and we ship an imagesize.pyc instead of an imagesize/__init__.pyc. * The version of the jinja2 package is different and the sets of files differs. * We ship the packaging package, which is a dependency for Sphinx. * The version of the pygments package is different and the sets of files differs. * We ship the requests package, which is a dependency for Sphinx. * We ship the snowballstemmer package, which is a dependency for Sphinx. * We ship the urllib3 package, which is a dependency for requests, which is a dependency for Sphinx. * We ship a newer version of the futures package, which includes a handful of extra modules that match Python 3 module names. # no-check-commit because foo_bar naming Differential Revision: https://phab.mercurial-scm.org/D6097

wix: move contrib/wix to contrib/packaging/wix We're trying to consolidate all our packaging code into contrib/packaging. Let's move the WiX files there. Differential Revision: https://phab.mercurial-scm.org/D6096

wix: remove hg.cmd This file is not referenced anywhere AFAICT. Differential Revision: https://phab.mercurial-scm.org/D6095

setup: include hgext3rd package in py2exe builds This is a core Mercurial package and we should always ship it. Differential Revision: https://phab.mercurial-scm.org/D6094

setup: properly install build_hgextindex for py2exe builds Because the hgbuild class has a private copy of build.sub_commands, modifying build.sub_commands from this code effectively resulted in a no-op. Registering the sub-command on hgbuild actually results in the sub-command running when building Mercurial. Differential Revision: https://phab.mercurial-scm.org/D6093

setup: configure py2exe config via environment variables The Inno Setup and WiX installers ship a different set of packages with py2exe builds. And there are multiple WiX installer variants (e.g. TortoiseHG). Since there are multiple variants of py2exe configs and they can be defined by entities not in our repository, let's provide a mechanism for setup.py to supplement behavior via environment variables. This is slighly less hacky than a setup.cfg file IMO since the caller doesn't need to worry about mutating global state of the source directory. Differential Revision: https://phab.mercurial-scm.org/D6092

packaging: extract py2exe functionality to own module py2exe builds are shared between Inno Setup and WIX. We'll want the logic for performing py2exe builds to be reusable across the code for both installers. This commit extracts the py2exe-specific functionality into its own module. There's definitely room to customize things further. This will be done in future commits, as necessary. (I'm not even sure what customizations WIX will require yet. Presumably a lot.) Differential Revision: https://phab.mercurial-scm.org/D6091

packaging: extract python exe info to own function This is generic functionality. We'll need it for WIX. As part of the port, we expose the full version and return the data as a dict. Differential Revision: https://phab.mercurial-scm.org/D6090

packaging: don't use temporary directory We were no longer doing anything with it after extracting virtualenv and py2exe to the build directory. Differential Revision: https://phab.mercurial-scm.org/D6089

packaging: extract virtualenv and py2exe to build directory The build directory is essentially a cache. We can extract the virtualenv and py2exe package sources to this directory. Differential Revision: https://phab.mercurial-scm.org/D6088

packaging: move Inno Setup core logic into a module Aspects of building the Inno Setup and WIX installers are shared. It will make sense for them to share code. Plus, having code in a reusable library (as opposed to a standalone script) is just a better approach. This commit moves the core logic to build the Inno Setup installer into the hgpackaging package. inno/build.py is now a simple frontend script that calls into a module to do the bulk of the work. As part of this change, I also found a typo in build() where it was referencing "iscc" instead of "iscc_exe." Because "iscc" was in the global scope via the only caller, things just happened to work before. Another benefit of always using functions and not putting global code for __main__ in the same file as library code. Differential Revision: https://phab.mercurial-scm.org/D6087

packaging: move find_vc_runtime_files() into hgpackaging.util In preparation for moving the bulk of the Inno Setup code into hgpackaging. Differential Revision: https://phab.mercurial-scm.org/D6086

packaging: move DOWNLOADS dict to hgpackaging.downloads We'll want to keep state in sync between multiple packaging tools. It makes sense to share a central data structure defining downloads. We also change the function to return the downloads entry so callers don't have to access the global DOWNLOADS in the new location. Differential Revision: https://phab.mercurial-scm.org/D6085

packaging: split downloading code into own module As we will introduce more code to support packaging, it will be useful to have download code in its own module. Differential Revision: https://phab.mercurial-scm.org/D6084

packaging: establish hgpackaging package Previously, contrib/packaging behaved as a root to a package directory and we had a "packagingutil" module. As I work more on packaging code, we'll want to have more code shared between different packaging tools. I think it makes sense to have a single package containing multiple modules than multiple top-level modules. This commit establishes an "hgpackaging" package by moving the existing packagingutil code to it. Differential Revision: https://phab.mercurial-scm.org/D6083

py3: use % instead of .format() on a bytestring Differential Revision: https://phab.mercurial-scm.org/D6112

py3: use r'' for group name arguments to MatchObjects in phabricator.py MatchObject group names are strings, not bytes. Using bytes in py3 leads to an IndexError. Differential Revision: https://phab.mercurial-scm.org/D6111

py3: use %d instead of %s when formatting an int into a byte string Differential Revision: https://phab.mercurial-scm.org/D6110

py3: only pass unicode to json.dumps in writediffproperties Differential Revision: https://phab.mercurial-scm.org/D6109

py3: fix a few "dict keys as str instead of bytes" issues in phabricator.py Differential Revision: https://phab.mercurial-scm.org/D6108

py3: convert URL to str before passing it to request Differential Revision: https://phab.mercurial-scm.org/D6106

py3: convert indexes into bytes when enumerating lists in urlencodenested Otherwise it'll try to insert them them into a %s slot in a b'' later and fail. Differential Revision: https://phab.mercurial-scm.org/D6105

py3: don't try and format a bare dict into a byte string in callconduit Differential Revision: https://phab.mercurial-scm.org/D6104

py3: use fsencode for vcr recording paths and strings for custom_patches args This fixes phabricator.py's vcrcommand under py3 Differential Revision: https://phab.mercurial-scm.org/D6102

phabricator: convert conduit response JSON unicode to bytes inside callconduit Previously the byte conversion was happening piecemeal in callers, and in the case of createdifferentialrevision not at all, leading to UnicodeEncodeErrors when trying to phabsend a commit with a description containing characters not representable in ascii. (issue6040) Remove all the scattered encoding.unitolocal calls and perform it once, inside callconduit, on the entire response dict recursively before returning it, in keeping with the strategy of converting at the earliest opportunity. Convert all keys used on returned object to bytes. Modify the phabsend tests to test this by adding a € to the commit message of alpha. Differential Revision: https://phab.mercurial-scm.org/D6044

transaction: include txnname in the hookargs dictionary There is no reason to not include the txnname alongside the txnid in all case. The python hooks already have them, so aligning the the shell hooks seems it could be useful in the future. (I don't have a strong opinion about this, we can also decide to never align the python and shell hooks and this and I'll drop this patch).

discovery-helper: reflect argument value in the name of the results It is common to create multiple pairs of repositories using different argument values. Recording the argument value in the results names has two main advantages: * It is easy to remember the value used to create a pair, * It get simpler to create multiple pair at the same time from the same source. Previously, running: `./discovery-helper.sh pypy 50 10` would create a `pypy-left` and `pypy-right` repository. Now it will create `pypy-50h-10d-left` and `pypy-50h-10d-right`.

discovery-helper: echo the stripped revsets early Having them printed early make it easy for a user to just grab the generated revset and directly uses them

contrib: move the `discovery-helper.sh` script in`perf-utils` directory The script appeared before the directory. However the directory exists for this kind of script. We move it there.

tests: stabilize test-split.t for Windows It looks like there will be additional problems beyond this trivial fix, but this should make the bot green again.

tests: stabilize test-share.t on Windows PYTHON was not getting mangled for MSYS style paths, and remote was spitting out remote: 'C' is not recognized as an internal or external command, remote: operable program or batch file. (once -q was removed). Additionally, this should fix a failure with py3 because of spaces in the path.

split: add tests which demonstrate the issue5864 Differential Revision: https://phab.mercurial-scm.org/D6057

discovery: clarify why the caching of children is valid Yuya Nishihara pointed out that the code looks wrong without this clarification. (And, unsurprisingly, Yuya is right)

tests: clarify test setup test in test-uncommit.t I assume the "hg uncommit b" is there to prove that the working copy is dirty before we try "hg uncommit --allow-dirty-working-copy b". It seems clearer to put that check just before we run the actual test. Differential Revision: https://phab.mercurial-scm.org/D6078

tests: fix a stale reference to experimental.uncommitondirtywdir These tests no longer test the config option, they test the command line flag. Differential Revision: https://phab.mercurial-scm.org/D6077

discovery: explicitly use `undecided` for the children mapping Recent performance achievements makes the assumption that the `undecided` set is used for sampling. That assumption is always true in practice. We stop pretending that taking anything else would make sense and we directly use the `undecided` set from the object. This provides a more honest API.

discovery: cache the children mapping used during each discovery During discovery, the `undecided` set keep shrinking. Therefore, the map computed for an iteration N will be valid for iteration N+1. Instead of computing the same data over and over we cache it the first time. Our private pathological case speed up from about 7.5 seconds to about 6.3 seconds. (starting from over 70s at the start of the full series)

discovery: move children computation in its own method This clarifies the main logic and starts to pave the way to some caching.

discovery: simplify the building of the children mapping Since we only care about the revisions inside the set we are sampling, we can use simpler code (and probably sightly faster).

discovery: simply walk the undecided revs when building the children mapping The sampling only care about revisions in the undecided set, so building children relationship within this set is sufficient. The set of undecided changesets can be much smaller than the full span from its smallest item to the tip of the repository. This restriction can significantly speed up operations in some cases. For example, on our private pathological case, this speeds things up from about 53 seconds to about 7.5 seconds.

discovery: use a lower level but faster way to retrieve parents We already know that no revision in the undecided set are filtered, so we can skip multiple checks and directly access lower level data. In a private pathological case, this improves the timing from about 70 seconds to about 50 seconds. There are other actions to be taken to improve that case, however this gives an idea of the general overhead.

discovery: avoid computing identical sets of heads twice The very same set of heads is computed in the previous statement, it seems more efficient to just copy that result.

discovery: moved sampling functions inside discovery object In this patch, we transform the sampling functions into methods of the `partialdiscovery` class in the Python case. This will provide multiple benefit. For example we can keep some cache from one sampling to another. In addition this will help the Oxidation work as all graph traversal related logic will be contained in a single object.

discovery: rename `srvheads` to `knownsrvheads` The `srvheads` variable only contains the known set of remove heads. Renaming the variable make it clearer.

verify: small refactoring and documentation in `_verifymanifest` Small changes to make this area of code clearer.

verify: document the `_verifymanifest` method

verify: document `_verifychangelog` We document the method input, output and checks.

verify: rename the `checklog` to `_checkrevlog` The method is for internal use only. In addition we make the method name explicitly contains `revlog` to make it clearer it is checking higher level revlog properties.

verify: document the `checklog` method Let us add details about what the function is expected to do.

revlog: add some documentation to the `checksize` method I had to look at it, so I figured I would leave some documentation for the next person seeking information.

verify: make `checkentry` a private method This method is for internal use only.

verify: document the `checkentry` method This method checks various core propertes of a revision. We document inputs, outputs and the checks performed.

verify: add some inline documentation to the top level `verify` method The goal is to clarify each section goal.