rebase: add support to output nodechanges This patch adds support to rebase to show the changes in node once the rebase is complete. This will be extremely helpful for automation purposes and editors such as Nuclide. The output is a dictionary of predecessor hash as key and a list of successors' hashes. The successors one is a list as there can be many successors for a single predecessor in case of split and it will good to have a generic output format. This patch adds tests for the same. A new file is created for the patch as existing files related to rebase has their own purpose and there will be more formatter support coming for rebase in next cycle. Thanks to Jun for suggesting to use fm.data(). Differential Revision: https://phab.mercurial-scm.org/D1173

ui: move request exit handlers to global state Since the ui objects can be created with the 'load' class method, it is possible to lose the exit handlers information from the old ui instance. For example, running 'test-bad-extension.t' leads to this situation where chg creates a new ui instance which does not copy the exit handlers from the earlier ui instance. For exit handlers, which are special cases anyways, it probably makes sense to have a global state of the handlers. This would ensure that the exit handlers registered once are definitely executed at the end of the request. Test Plan: Ran all the tests without '--chg' option. This also fixes the 'test-bad-extension.t' with the '--chg' option. Differential Revision: https://phab.mercurial-scm.org/D1166

sparse-read: skip gaps too small to be worth splitting Splitting at too small gaps might not be worthwhile. With this changeset, we stop considering splitting on too small gaps. The threshold is configurable. We arbitrarily pick 256K as a default value because it seems "okay". Further testing on various repositories and setups will be needed to tune it. The option name is 'experimental.sparse-read.min-gap-size`, and replaces `experimental.sparse-read.min-block-size` which is not used any more.

sparse-read: move from a recursive-based approach to a heap-based one The previous recursive approach was trying to optimise each read slice to have a good density. It had the tendency to over-optimize smaller slices while leaving larger hole in others. The new approach focuses on improving the combined density of all the reads, instead of the individual slices. It slices at the largest gaps first, as they reduce the total amount of read data the most efficiently. Another benefit of this approach is that we iterate over the delta chain only once, reducing the overhead of slicing long delta chains. On the repository we use for tests, the new approach shows similar or faster performance than the current default linear full read. The repository contains about 450,000 revisions with many concurrent topological branches. Tests have been run on two versions of the repository: one built with the current delta constraint, and the other with an unlimited delta span (using 'experimental.maxdeltachainspan=0') Below are timings for building 1% of all the revision in the manifest log using 'hg perfrevlogrevisions -m'. Times are given in seconds. They include the new couple of follow-up changeset in this series. delta-span standard unlimited linear-read 922s 632s sparse-read 814s 566s

subrepo: implement 'unshare' for Mercurial subrepos I think there's a slight hole here in that a subrepo could be shared, removed from .hgsub, and then it's not part of context.substate (so not iterated over). But the push command has the same hole IIRC, and I think removing a subrepo is an edge case. The import hack is a copy/paste of subrepo.subrepo().

share: move the implementation of 'unshare' to the 'hg' module This will be used to setup unsharing subrepos. Usually cmdutil is used for this purpose. But the implementation needs hg.copystore(), and the hg module already imports cmdutil.

show: use labelcset() template alias for work (and stack) views By reusing labelcset() template alias from map-cmdline.default we can now display obsolescence information in `hg show work/stack`.

phases: pass phase names to hooks instead of internal values

configitems: document the choice of using 'match' instead of 'search'

configitems: do not directly match generic items Before this changesets, a literal '.*:foo$' config would match a registered '.*:foo$' generic. This is wrong since generic should be matched through regular exception only. This changeset fixes this problem. Thanks for to Yuya Nishihara for spotting the issue.

obsfate: fix obsfate_printer with empty date list When the list of dates is empty, `min` and `max` would raises a ValueError. Protect against this case by checking that the date list is not empty. I didn't add a test because I couldn't find a reproducing test case.

config: gather allowdivergence under the evolution namespace Grouping all evolution related-config under the experimental.evolution namespace would helps the future migration outside [experimental]. Differential Revision: https://phab.mercurial-scm.org/D1155

config: remove stabilization.* aliases Stabilization config items were never part of a release, remove them now that we cleaned up the evolution related configuration. Differential Revision: https://phab.mercurial-scm.org/D1154

config: rename stabilization.track-operation We want to get rid of stabilization.* configuration, back out to the old configuration 'evolution.track-operation'. Differential Revision: https://phab.mercurial-scm.org/D1153

config: rename stabilization.bundle-obsmarker We want to get rid of stabilization.* configuration, back out to the old configuration 'evolution.bundle-obsmarker'. Differential Revision: https://phab.mercurial-scm.org/D1152

config: use 'experimental.evolution.exchange' Extract 'experimental.evolution' = exchange as 'experimental.evolution.exchange'. We keep the new option in the 'experimental.evolution' namespace in order to stay coherent with other options ('experimental.evolution.bundle-obsmarker' and 'experimental.evolution.track-operation') ease the renaming as possibly 'evolution.exchange'. Differential Revision: https://phab.mercurial-scm.org/D1151

config: use 'experimental.evolution.allowunstable' Extract 'experimental.evolution' = allowunstable as 'experimental.evolution.allowunstable'. We keep the new option in the 'experimental.evolution' namespace in order to stay coherent with other options ('experimental.evolution.bundle-obsmarker' and 'experimental.evolution.track-operation') ease the renaming as possibly 'evolution.allowunstable'. Differential Revision: https://phab.mercurial-scm.org/D1150

config: use 'experimental.evolution.create-markers' Extract 'experimental.evolution' = createmarkers as 'experimental.evolution.createmarkers'. We keep the new option in the 'experimental.evolution' namespace in order to stay coherent with other options ('experimental.evolution.bundle-obsmarker' and 'experimental.evolution.track-operation') ease the renaming as possibly 'evolution.createmarkers'. Differential Revision: https://phab.mercurial-scm.org/D1149

config: replace experimental.stabilization by experimental.evolution We replace 'experimental.stabilization=all' by 'experimental.evolution=true' as we will extract individual config in their own config in later patches. Differential Revision: https://phab.mercurial-scm.org/D1148

config: update evolution-related config Update the evolution helpers function to support both old-style configuration and new-style configuration: experimental.evolution=all is renamed into experimental.evolution=true experimental.evolution=createmarkers is renamed into experimental.evolution.createmarkers=true experimental.evolution=allowunstable is renamed into experimental.evolution.allowunstable=true experimental.evolution=exchange is renamed into experimental.evolution.exchange=true We choose to not rename individual config options; keeping the same names would easy the transition for users but it's something that could be easily done in the future. Differential Revision: https://phab.mercurial-scm.org/D1147

config: invert evolution-related configuration aliases We want to split the evolution-related configuration and back-out the renaming from evolution.* to stabilization.*. First invert the configuration and aliases, so next changesets will be cleaner. Differential Revision: https://phab.mercurial-scm.org/D1146

parsers: allow clang-format here # skip-blame because parsers.c is mechanically rewritten by clang-format with no semantic change. Differential Revision: https://phab.mercurial-scm.org/D1170

cext: add /* header */ comment to all PyVarObject_HEAD_INIT() calls This gives clang-format the right notion about formatting these struct initializers, therefore allowing us to automatically format several additional files. # skip-blame because this is just a content-free comment addition Differential Revision: https://phab.mercurial-scm.org/D1169

parsers: protect some case-folding tables from clang-format We want a slightly weird format here so that it's easier to read, but in order to preserve that we need to disable clang-format. Differential Revision: https://phab.mercurial-scm.org/D1168

makefile: add target to apply clang-format in-place This makes it easy to reformat files after you finish editing them. Differential Revision: https://phab.mercurial-scm.org/D1167

configitems: adds a developer warning when accessing undeclared configuration Now that all known options are declared, we setup a warning to make sure it will stay this way. We disable the warning in two tests checking other behavior with random options.

log: add -L/--line-range option to follow file history by line range We add an experimental -L/--line-range option to 'hg log' taking file patterns along with a line range using the (new) FILE,FROMLINE-TOLINE syntax where FILE may be a pattern (matching exactly one file). The resulting history is similar to what the "followlines" revset except that, if --patch is specified, only diff hunks within specified line range are shown. Basically, this brings the CLI on par with what currently only exists in hgweb through line selection in "file" and "annotate" views resulting in a file log with filtered patch to only display followed line range. The option may be specified multiple times and can be combined with --rev and regular file patterns to further restrict revisions. Usage of this option requires --follow; revisions are shown in descending order and renames are followed. Only the --graph option is currently not supported. The UI is the result of a consensus from review feedback at: https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-October/106749.html The implementation spreads between commands.log() and cmdutil module. In commands.log(), the main loop may now use a "hunksfilter" factory (similar to "filematcher") that, for a given "rev", produces a filtering function for diff hunks for a given file context object. The logic to build revisions from -L/--line-range options lives in cmdutil.getloglinerangerevs() which produces "revs", "filematcher" and "hunksfilter" information. Revisions obtained by following files' line range are filtered if they do not match the revset specified by --rev option. If regular FILE arguments are passed along with -L options, both filematchers are combined into a new matcher. .. feature:: Add an experimental -L/--line-range FILE,FROMLINE-TOLINE option to 'hg log' command to follow the history of files by line range. In combination with -p/--patch option, only diff hunks within specified line range will be displayed. Feedback, especially on UX aspects, is welcome.

diff: pass a diff hunks filter function from changeset_printer to patch.diff() We add a 'hunksfilterfn' keyword argument in all functions of the call stack from changeset_printer.show() to patch.diff(). This is a callable that will be used to filter out hunks by line range and will be used in the "-L/--line-range" option of "hg log" command introduced in the following changesets.

diff: also yield file context objects in patch.trydiff() (API) And retrieve them in patch.diffhunks(). We'll use these in forthcoming changesets to filter diff hunks by line range.

revset: extract a parsefollowlinespattern helper function We'll need the same logic in forthcoming changeset to handle --line-range option in 'hg log' command. The function lives in scmutil.py (rather than util.py) as it uses match and pathutil modules.

obsfate: add obsfate to default mapfile Use the verbosity aware template keyword introduced earlier. It has the nice property of being verbosity dependent but in order to customize the obsfate part, users will need to replace the lobsfate definition from default mapfile with the one using template functions (by copying the one from test-obsmarker- template.t for example). As it's a more advanced use-case, I'm more inclined to have the same code for the {obsfate} keyword, in the changeset printer and in the default mapfile for consistency. But, the definition in default mapfile could be replaced with one based on template filter to obsfate output customization if it is a big need for users.

log: add obsfate by default in changeset printer Having an obsfate by default in log will be useful for users to understand why they have obsolete and unstable changesets. Obsfate will only be shown for obsolete changesets, which only happens if people opt-in to experimental feature. But when obsolete changeset are visible, it is very useful to understand where they are. Having it in log could be sufficient for most people, so they don't have to learn a new command (like obslog which is itself useful in case of divergences). For example, when pulling and working directory parent become obsolete: $ hg pull ... working directory parent is obsolete! (f936c1697205) This message comes from the Evolve extension. Obsfate would comes handy: $ hg log -G o changeset: 2:6f91013c5136 | tag: tip | parent: 0:4ef7b558f3ec | user: Boris Feld <boris.feld@octobus.net> | date: Mon Oct 09 16:00:27 2017 +0200 | summary: A | | @ changeset: 1:f936c1697205 |/ user: Boris Feld <boris.feld@octobus.net> | date: Mon Oct 09 16:00:27 2017 +0200 | obsfate: rewritten using amend as 2:6f91013c5136 | summary: -A | o changeset: 0:feb4dd822b8c user: Boris Feld <boris.feld@octobus.net> date: Tue Oct 09 16:00:00 2017 +0200 summary: ROOT And once we update, we don't have an obsolete changeset in the log anymore so we don't show obsfate anymore, most users won't see obsfate often if they don't have obsolete changeset often: @ changeset: 2:6f91013c5136 | tag: tip | parent: 0:4ef7b558f3ec | user: Boris Feld <boris.feld@octobus.net> | date: Mon Oct 09 16:00:27 2017 +0200 | summary: A | o changeset: 0:feb4dd822b8c user: Boris Feld <boris.feld@octobus.net> date: Tue Oct 09 16:00:00 2017 +0200 summary: ROOT

obsfate: only display date in verbose mode The date is also not that helpful in most cases but we show it in verbose mode.

obsfate: filter out current user if not in verbose Obsolescence is sometimes used only locally so the obs-marker users is always the same. Showing the user in this case does not bring much values. In the case where multiple users rewrite the commit, display the full list of users. Also show all users in verbose mode.

ui: add the possibility to returns None as username in ui In a later patch we want to retrieve the current username or None if it isn't defined. Add the acceptempty parameter instead of catching Abort.

test: test obfate template keyword in test-obsmarker-template.t These test updates are pretty big by themselves so put it in a separate patch for easing the review process.

templatekw: introduce obsfate keyword Introduce an obsfate printer that uses all helpers functions defined in obsutil to get all the obsfate-related data and format a string according to the current format in test-obsmarker-template.t. Then, introduce an obsfate templatekw that uses the obsfateprinter to return a list of strings. The goal is not to replace existing obsfate template functions but to propose a default, good-enough and easily usable obsfate definition for end-users that don't want to customize it. Such output would ultimately get included in the default log output. Here are some output examples for a commit amended: rewritten using amend as 5:a9b1f8652753 by test (at 1970-01-01 00:00 +0000) Next patches will make the output dependent on the verbosity. Exemple of use-cases: For having the obsfate on a single-line between brackets: {if(obsfate, " [{join(obsfate, "; ")}]")} For having the obsfate in several lines: {if(obsfate, "{obsfate % " Obsfate: {fate}\n"}")}

copies: add a config to limit the number of candidates to check in heuristics The heuristics algorithm find possible candidates for move/copy and then check whether they are actually a copy or move. In some cases, there can be lot of candidates possible which can actually slow down the algorithm. This patch introduces a config option `experimental.copytrace.movecandidateslimit` using which one can limit the candidates to check. The limit defaults to 100. Thanks to Yuya for suggesting to skip copytracing for that file with a warning. Differential Revision: https://phab.mercurial-scm.org/D987

extensions: always include traceback when extension setup fails I have spent a lot of time debugging extensions that failed to load because we don't include a traceback and I didn't realize I could get traceback for the extension failure with --traceback. Let's just turn them on by default, since it should be rare that the user sees these tracebacks anyway (and if they do, it's not so bad if the extra traceback pushes them a little harder to report the problem). Since we already had a test case with --traceback and one without, I just removed the one with the flag. Differential Revision: https://phab.mercurial-scm.org/D1164

tests: move baduisetup() test out of "#if demandimport" It no longer depends on demandimport. Differential Revision: https://phab.mercurial-scm.org/D1163

tests: make test-extension.t's baduisetup.py test fail even if bdiff exists A mercurial.bdiff module has existed at some point and when I have built at an old version, some .pyc file or something seems to stick around and test-extension.t fails. Let's remove the reference to bdiff and simplify the test. Differential Revision: https://phab.mercurial-scm.org/D1162

run-tests: move newline out of colorized message The leading newline before "ERROR:" led to an incorrect lexing of the message and the newline got lost. The fixed formatting can be seen in the test case. The reason we didn't notice before was that the bad formatting just led to the loss of a blank line in the test. However, there are other cases where it would be joined with a line saying "Accept this change? [n]" or "Reference output has changed (run again to prompt changes)". Differential Revision: https://phab.mercurial-scm.org/D1159

test-extension: make the test compatible with chg This test fails when run with chg. This commit just makes the test chg aware by fixing the output of some of the tests. Test Plan: Ran the test 'test-extension.t' with and without '--chg' option. Differential Revision: https://phab.mercurial-scm.org/D1160

hghave: disable demandimport when chg is running Chg disables demandimport on purpose for performance wins and therefore, it probably makes sense to indicate that demandimport is disabled when chg is running. Test Plan: Ran all the tests. Differential Revision: https://phab.mercurial-scm.org/D1161

test-show: make it compatible with chg The show extension reads `commands.show.aliasprefix` config in its `extsetup` and that causes issues with chg. This patch adds that config item to chg confighash to solve the issue. Test Plan: `run-tests.py -l --chg test-show.t` Differential Revision: https://phab.mercurial-scm.org/D1158

templater: use pycompat.sysbytes to bytes-ify some __name__ attrs Spotted by yuya in review of e87e62b7fc0b. Differential Revision: https://phab.mercurial-scm.org/D1145

templatefilters: defend against evil unicode strs in json filter We only want to do I/O in terms of bytes, so lets explode early instead of recursing forever. Differential Revision: https://phab.mercurial-scm.org/D1136

phase: use a binary phase part to push through bundle2 (BC) The part we are using for pull is now used for push too. As we no longer use pushkey, pushkey hooks are no longer triggered. This is an obvious backward incompatible change. We could artificially trigger the pushkey hook within the bundle2 part, but this seemed too hacky to me. An option would be to disable by default this new mechanism for a couple of versions to help people migrate to `txnclose-phase`. I took the liberal and optimistic path to just turn it on by default directly. .. bc:: Push no longer triggers a pushkey hook when updating phases. Use the new `txnclose-phase` and `txnclose-phase` hooks instead. (Applies when both server and client use version 4.4 or above).

arbitraryfilecontext: skip the cmp fast path if any side is a symlink `filecmp` follows symlinks by default, which a `filectx.cmp()` call should not be doing as it should only compare the requested entry. After this patch, only the contexts' data are compared, which is the correct contract. This is a corrected version of D1122. Differential Revision: https://phab.mercurial-scm.org/D1165

test-clang-format: new test to verify that files stay clang-formatted For now all .c and .h files are blacklisted. As they become clang-formatted, we'll remove them from the blacklist,and then this test will produce output if there are diffs. Differential Revision: https://phab.mercurial-scm.org/D1133

context: audit paths before clearing unknown files and dirs Fix regression introduced in D785. In some circumstances, context.clearunknown can be called before the path is audited. Audit the path before deleting any conflicting files. Differential Revision: https://phab.mercurial-scm.org/D1157

tests: add test demonstrating regression in path audit D785 regressed behavior in path auditing: files can be deleted if they have a path that conflicts with a filename from a malicious remote or bundle. This test demonstrates the problem - the file should not have been deleted. Differential Revision: https://phab.mercurial-scm.org/D1156

configitems: move rebase config into core The shelve extensions import and call rebase content without loading the extension. This is problematic as the config items rebase uses are not declared and the default value are not set, etc... The shelve extension should be using core utilities only and the necessary bit should be moved from rebase into core. In the meantime, I'm taking a small step to get config registration completed with minimal overhead. The rebase extension is shipped with core so registering its config option within core is not a big issue. This is the last step needed before we can install a warning that enforces all config to be registered.

eol: ensure the eol extensions is loaded when hooks run Similar to the change we did to the 'acl' extensions, we want to make sure the config items are registered before we run the hooks.

acl: make sure the extensions is enabled when the acl-hooks run The acl extension is usually setup through hooks and never directly activated. This means the config item declared in the extension are not loaded. We add the necessary logic to make sure the extensions are loaded before the hook run.

configitems: register the 'web.archivesubrepos' config

configitems: register the 'experimental.effect-flags' config

configitems: register the full 'merge-tools' config and sub-options We register the merge-tools config section (which has an arbitrary base config value) and the possible sub-attribute. The sub-attribute has to be registered first or at the same time otherwise the '.*' item would shadow them. Merge tools could include "." in their name so we can't constrain any more than just ".*".

revlog-sparse-read: add a lower-threshold for read block size The option experimental.sparse-read.min-block-size specifies the minimal size of a deltachain span, under which it won't be split by _slicechunk.

revlog: introduce an experimental flag to slice chunks reads when too sparse Delta chains can become quite sparse if there is a lot of unrelated data between relevant pieces. Right now, revlog always reads all the necessary data for the delta chain in one single read. This can lead to a lot of unrelated data to be read (see issue5482 for more details). One can use the `experimental.maxdeltachainspan` option with a large value (or -1) to easily produce a very sparse delta chain. This change introduces the ability to slice the chunks retrieval into multiple reads, skipping large sections of unrelated data. Preliminary testing shows interesting results. For example the peak memory consumption to read a manifest on a large repository is reduced from 600MB to 250MB (200MB without maxdeltachainspan). However, the slicing itself and the multiple reads can have an negative impact on performance. This is why the new feature is hidden behind an experimental flag. Future changesets will add various parameters to control the slicing heuristics. We hope to experiment a wide variety of repositories during 4.4 and hopefully turn the feature on by default in 4.5. As a first try, the algorithm itself is prone to deep changes. However, we wish to define APIs and have a baseline to work on.

revlog: ignore empty trailing chunks when reading segments When a merge commit creates an empty diff in the revlog, its offset may still be quite far from the end of the previous chunk. Skipping these empty chunks may reduce read size significantly. In most cases, there is no gain, and in some cases, little gain. On my clone of pypy, `hg manifest` reads 65% less bytes (96140 i/o 275943) for revision 4260 by ignoring the only empty trailing diff. For revision 2229, 35% (34557 i/o 53435) Sadly, this is difficult to reproduce, as hg clone can make its own different structure every time.

phase: isolate logic to update remote phrase through bundle2 pushkey Move the logic to build bundle2 pushkey part into its dedicated function. It will help to keep the logic clear when adding support for sending phases change using 'phase-heads' part.

phase: generate a push-race detection part on push We are about to switch phase pushing from using pushkey to using a the new dedicated binary part. We introduce the push race detection on its own to help detect potential impact.

phase: introduce a new 'check:phases' part This part checks if revisions are still in the same phase as when the bundle was generated. This is similar to what 'check:heads' or 'check:updated-heads' bundle2 part achieves for changesets. We needs seems before we can move away from pushkey usage from phase since pushkey has it own built-in push-race detection.

phase: gather remote phase information in a summary object We keep useful phase information around. The data will be reused with detecting push-race in later changesets.

phase: simplify the check for issue3781 shortcut in discovery We'll rework the code around this check. Limiting the entanglement will help with later changesets

exchange: fix issue3781 reference in the comment This comment is about: issue3781: Courtesy Phases synchronisation to publishing server prevent subrepo push Not about: issue3871: Slow hg log when template contains {file_adds}, {file_mods} and {file_dels}

phase: filter out non-draft item in "draft root" The on-disk file can contain draft root that are descendants of secret root. The resulting phase computation is correct, but the phases root content is not. I will send another series to introduce code that remove some of the cases where this can happens, but we first need to damage control the existing case. After this changeset, we can no longer advertise secret changeset as draft root.

subrepo: share instead of clone if the parent repo is shared (issue5675) (BC) Previously, only the top level repo was shared, and then any subrepos were cloned on demand. This is problematic because commits to the parent repo would write an updated .hgsubstate to the share source, but the corresponding subrepo commit would be stuck in the local subrepo. That would prevent an update in the source repo. We already go to great lengths to avoid having inconsistent repos (e.g., `hg push -r rev` will push _everything_ in a subrepo, even if it isn't referenced in one of the parent's outgoing commits). Therefore, this seems like a bug fix, and there's no option to get the old behavior. I can't imagine the previous behavior was useful to anybody. There shouldn't be an issue with svn, since it is centralized. Maybe --git-dir can be used for git subrepos, but I'll leave that to someone more familiar with git. An integer was previously being implicitly returned from commands.share(), which caused dispatch() to start crashing when changing over to returning the shared repo. All error paths appear to raise, so this can be hardcoded to success. The clone command checks for 'is None' in a similar pattern, but since hg.clone() always returns a tuple, that seems wrong? .. fix:: Issue 5675 Creating a share of a repository with a Mercurial subrepository will now share the subrepository. and .. bc:: Mercurial subrepositories are now shared instead of cloned when the parent repository is shared. This prevents dangling subrepository references in the share source. Previously shared repositories with cloned subrepositories will continue to function unchanged.

tests: update output for no-symlink platforms This goes with eb586ed5d8ce.

releasenotes: show a warning if fuzzywuzzy is not present Differential Revision: https://phab.mercurial-scm.org/D1121

releasenotes: move import of fuzzywuzzy to import level This will help us in determining easily that whether fuzzywuzzy is loaded or not loaded in any of the function. Differential Revision: https://phab.mercurial-scm.org/D1120

releasenotes: don't abort is there is a bad formatted entry for releasenotes While producing releasenotes for (4.3::), releasenotes aborts with error because of some bad formatting of releasenotes in some commits. Instead of aborting, this adds warning message which will help us in skipping them and telling user about it. Differential Revision: https://phab.mercurial-scm.org/D1097

releasenotes: make the import of fuzzywuzzy optional If fuzzywuzzy is note present, we will not be having the capability to merge existing releasenotes with the new releasenotes on the similarity basis. The merging will still work good for exact same releasenotes entries. Differential Revision: https://phab.mercurial-scm.org/D1096

webcommands: replace str(ctx) etc with pycompat.bytestr(ctx) etc hgweb can now serve the graph view in Python 3. Differential Revision: https://phab.mercurial-scm.org/D1138

templater: don't blow up when trying to build an abort message __name__ is unicode, but we need bytes. For now, we'll make the (mostly-safe) assumption that template filter names will be ascii. Differential Revision: https://phab.mercurial-scm.org/D1137

webutil: use pycompat.bytestr() instead of str() Stops us from choking the templater on Python 3. With this patch applied, much of hgweb works correctly in Python 3. The notable exception is the graph page, which chokes because it gets node IDs as str instead of bytes. Differential Revision: https://phab.mercurial-scm.org/D1135

hgweb: correct an earlier error of mine - `start` should be bytes Gets hgweb very close to working with Python 3. Differential Revision: https://phab.mercurial-scm.org/D1134

config: simplify aliasing commands.update.check experimental.updatecheck was renamed into commands.update.check, use the config system to provides the fallback on the old config name instead of adding more code. Differential Revision: https://phab.mercurial-scm.org/D1117

run-tests: set HGPLAIN=1 when bisecting Otherwise a customized template may break the regex matching the bisect output. Differential Revision: https://phab.mercurial-scm.org/D949

run-tests: extract Popen logic to a single method This removes 3 lines in total LOC and makes the upcoming changes easier. Differential Revision: https://phab.mercurial-scm.org/D948

run-tests: move bisect logic to a separate method This removes 8 space indentation and makes upcoming changes easier. Differential Revision: https://phab.mercurial-scm.org/D947

mpatch: switch alignment of wrapped line from tab to spaces with clang-format I may be a weird person for liking this style, but our C style is historically nominally the Linux Kernel style, and when you configure clang-format to be kernel-ish, this is what you get. If we want to change it, we can do so by tweaking the formatter rules in the future. Differential Revision: https://phab.mercurial-scm.org/D1132

mpatch: reformat function prototypes with clang-format Differential Revision: https://phab.mercurial-scm.org/D1131

contrib: remove check-code rule about indentation We're moving towards a clang-format world, and clang-format is able to wrap argument lists with spaces reliably, while still enforcing tabs globally. Let's let clang-format do its job, and not do as much C-style enforcement with regular expressions. Differential Revision: https://phab.mercurial-scm.org/D1130

clang-format: configuration for the clang-format source formatter Differential Revision: https://phab.mercurial-scm.org/D1129

merge: allow user to halt merge on merge-tool failures Depends on D932. Call the new _onfilemergefailure function when a merge tool reports failure via a return code. Differential Revision: https://phab.mercurial-scm.org/D951

filemerge: introduce functions to halt merge flow Depends on D931. This patch introduces functions and a config option that will allow a user to halt the merge if there are failures during a file merge. These functions will be used in the next patch. Differential Revision: https://phab.mercurial-scm.org/D932

amend: add a flag `-n/--note` to store note with amend This patch utilises the functionality added in previous patches and adds a flag to amend command in hgext/amend to add a note to the amend. Since the note is stored in the obsmarker metadata, this will only be useful when obsmarker creation is enabled, otherwise this is no-op. Not adding releasenotes part as we yet don't have a functionality in core to show the note. Differential Revision: https://phab.mercurial-scm.org/D1095

cmdutil: pass metadata from amend() to cleanupnodes `commit --amend` and amend command in core and extensions rely on cmdutil.amend() for amending a commit. So the logic to add a note to amend must reside here. This patch assumes that note will be passed in opts dictionary to the function and it will be passed to cleanupnodes and then createmarkers to store the note in the obsmarker metadata. After this patch, note can be stored on an amend changeset by passing notes as a part of opts to cmdutil.amend(). Differential Revision: https://phab.mercurial-scm.org/D1094

scmutil: add capability to cleanupnodes to take obsmarker metadata This patch adds a metadata argument to cleanupnodes() which will be dict and can be passed to obsmarker.createmarkers() and can be stored on the obsmarker. In cases when obsolescence is not enabled, the metadata argument is useless. This is a step towards storing a note in amend. Differential Revision: https://phab.mercurial-scm.org/D1093

test-hgweb-annotate-whitespace: make test compatible with chg D946 fixed a bunch of tests which had the same root cause. Please see that for details. This seems to be one of the newer tests which fails because of the same reason. Test Plan: Ran the test 'test-hgweb-annotate-whitespace.t' with and without the '--chg' option. Differential Revision: https://phab.mercurial-scm.org/D1124

test-pager: make the test compatible with chg D911 tried to make this test compatible with chg but instead resulted in the test being flaky for chg. For now, disabling this test for chg because it seems difficult to fix the test. This will allow for the continuous build setup for chg. Test Plan: Ran the test 'test-pager.t' with and without the '--chg' option. Differential Revision: https://phab.mercurial-scm.org/D1128

test-obsolete-bounds-checking: make the test compatible with chg This test fails when run with chg because the error message starts with "ProgrammingError" instead of "mercurial.error.ProgrammingError". Therefore, globing the "mercurial.error." to ensure that the test is compatible with chg. Test Plan: Ran the test 'test-obsolete-bounds-checking.t' with and without the '--chg' option. Differential Revision: https://phab.mercurial-scm.org/D1127

test-dispatch: make the test compatible with chg The test is broken when run with chg because it prints a different error message when chg is running. This commit fixes the test by special casing for chg. Test Plan: Ran the test 'test-dispatch.t' with and without '--chg' option. Differential Revision: https://phab.mercurial-scm.org/D1126

histedit: remove the nonexistant config 'histeditng' D942 removed the experimental config 'histeditng'. This is a leftover which should have been removed in that commit. Therefore, this commit completes the cleanup. Test Plan: Ran all the tests. Differential Revision: https://phab.mercurial-scm.org/D1123