narrow: drop server support for widening using the getbundle command (BC) The client still supports widening using the getbundle, which we (Google) still depend on a for a little while more (we've started the migration to the new narrow_widen command, but we're not done yet). Differential Revision: https://phab.mercurial-scm.org/D7093

widening: duplicate generateellipsesbundle2() for widening The widening and the non-widening code are quite different. It will be clearer to have them as sepearate functions. To start with, I've just copied it exactly, so it's clearer over the next few patches how they're different. The new function should gradually become more similar to bundle2.widen_bundle(), and should perhaps eventually be merged with that function. However, I've left it in narrowbundle2.py for now since it still depends on constants like _KILLNODESIGNAL there. Differential Revision: https://phab.mercurial-scm.org/D7092

tests: show graph log before and after widening in more cases I'm about to make some changes to which revisions get sent during widening. Some more tests will make it clearer what changes. I've also switched to graph log so we easily notice if the graph shape changes. Differential Revision: https://phab.mercurial-scm.org/D7091

tracing: add a couple of trace points on obsolete and repoview I was seeing weird stalls in some fast commands, and these trace events help explain them. Differential Revision: https://phab.mercurial-scm.org/D6550

dirstate: add some traces on listdir calls I'm starting to spend some time trying to make `hg status` do less work, and knowing what's happening in here and what's expensive is an important start. Differential Revision: https://phab.mercurial-scm.org/D7109

cleanup: hgdemandimport.tracing accepts strings, not bytes This does mean that the resulting traces will have some b'' goo in them on Python 3, but I think that's a worthwile price to pay since it doesn't break any tests. Differential Revision: https://phab.mercurial-scm.org/D7108

tests: fix formatting test after move of black config Differential Revision: https://phab.mercurial-scm.org/D7102

rust-dependencies: pin the dependencies of hg-core to prevent breakage A new version of the `rand` crate broke two discovery tests. We should upgrade our dependencies periodically manually. Differential Revision: https://phab.mercurial-scm.org/D7115

automation: install Python 3.8.0 Python 3.8 has been released. Let's install it instead of the RC / development version. Differential Revision: https://phab.mercurial-scm.org/D7114

automation: schedule an EC2Launch run on next boot Without this, launching EC2 instances constructed from the AMI won't go through the normal EC2 instance launch machinery. This missing machinery does important things like set up network routes to use the instance metadata service and process any UserData. Since EC2Launch now runs on subsequent boots and UserData is processed, we needed to make setting of UserData conditional on bootstrapping mode. Differential Revision: https://phab.mercurial-scm.org/D7113

dirs: give formatting oversight to clang-format Differential Revision: https://phab.mercurial-scm.org/D7104

dirs: tag a struct as not being formattable Differential Revision: https://phab.mercurial-scm.org/D7103

sidedatacopies: only store an entry if it has values This will make for a shorter storage and help use to write faster code in simple case. This change already provided a speed boost for copy tracing. For example here is combined time of running copies tracing on a 6989 pairs of revision on the pypy repos: before: 771s after: 631s - 18% This also has a very positive impact on changelog size. For example here are the number for the `00changelog.d` file of pypy. before: 30449712 Bytes after: 24973718 Bytes - 18% This give an overall quite acceptable overhead for storing copies into the changelog: filelog-only: 23370586 sidedata: 24973718 Bytes + 7% Differential Revision: https://phab.mercurial-scm.org/D7068

sidedatacopies: only read from copies when in this mode If we know we expect data from sidedata, we read them from sidedata and nothing else. This avoid looking into extra for revision without sidedata entries. Such revision will be introduced in the next changesets. Differential Revision: https://phab.mercurial-scm.org/D7067

dirs: remove mutable string optimization at all As far as I can see, the optimization trick has been dead since 42e89b87ca79 "dirs: speed up by storing number of direct children per dir". After 42e89b87ca79, the key variable is cleared to NULL at each iteration.

py3: prevent comparison with None in curses histedit (issue6196)

fix: match patterns relative to root I was surprised fixer patterns (used to determine which fixers to run) are applies to the parent directory, not the repo root directory. Danny Hooper (the author of the extension) seemed to agree that it's better to apply them to the repo root, so that's what this patch does. Differential Revision: https://phab.mercurial-scm.org/D7101

tests: add test showing that fixer patterns are currently relative to $PWD Differential Revision: https://phab.mercurial-scm.org/D7100

black: also ignore grey.py Differential Revision: https://phab.mercurial-scm.org/D7090

black: use multiline exclude definition Our excludes list is pretty complicated, so let's give ourselves some readability. Black treats multiline exclude definitions as verbse regular expressions, so we can split this up and make it easier to consume. Differential Revision: https://phab.mercurial-scm.org/D7089

black: move remaining config knobs into toml file Differential Revision: https://phab.mercurial-scm.org/D7088

black: rename pyproject.toml to black.toml Black won't read this automatically (you'll have to specify --config), but having a pyproject.toml *at all* puts pip in PEP 517/518 mode which breaks us for obscure reasons I don't understand. Rather than waste a ton of time fighting with pip, let's just do this. Differential Revision: https://phab.mercurial-scm.org/D7087

fix: remove a never-true check for unset pattern in Fixer.affects() We don't create an instance of a Fixer if the pattern is None, so we don't need to check that in affects(). Differential Revision: https://phab.mercurial-scm.org/D7086

fix: warn when a fixer doesn't have a configured command It seems we currently produce an empty command line and then decide to not run it, but it seems better to skip that part too. Differential Revision: https://phab.mercurial-scm.org/D7085

fix: make Fixer initialization more explicit for clarity I found it quite confusing that Fixer accessed fields that seemed like they didn't exist. Differential Revision: https://phab.mercurial-scm.org/D7084

fix: don't pass in default value when looking up config The defaults are now registered correctly so we don't need to pass in the default value when we look up a config value. Differential Revision: https://phab.mercurial-scm.org/D7083

fix: fix registration of config item defaults Before this patch, because of the "(:<name>)?", all registered patterns would match and the default value would not be the one we thought we had registered (maybe it just took the default value for the first match?). This didn't matter because we didn't care about the default value; we used our own, intended default value in getfixers() anyway. We also have to look up each config item individually in order to not get developer warnings. Differential Revision: https://phab.mercurial-scm.org/D7082

automation: capture additional exception when formatting I started encountering this for some reason. Differential Revision: https://phab.mercurial-scm.org/D7078

contrib: update to latest Windows package versions Let's keep modern. Differential Revision: https://phab.mercurial-scm.org/D7077

rust-cpython: drop direct dependency on python(27|3)_sys We no longer use it.