revset: remove redundant condition and change to else from elif Before going to this piece of code, we already check whether n is in [0, 1, 2], so dropping the redundant condition.

tests: add tests for predicates and operators which works with wdir() This one is cluttering up the test file though.

revset: add support for "wdir()^n" This patch catches the WdirUnsupported exception raised, and adds support for wdir^n which will give us the nth parent of the working directory.

revset: add parentheses after wdir since its a function wdir was shown in help rather than wdir().

cmdutil: avoid redefining write() function in export if possible Doing less work inside the loop just feels better to me.

cmdutil: extract closure that performs the actual export formatting This simplifies things a little by making the actual act of turning a revision into patch data a single function. After this, adding formatter support to `hg export` should be much simpler.

cmdutil: use a generator expression instead of a list comprehension

cmdutil: rename template param to export to fntemplate It's actually a template for the filename, not a formatter template.

cmdutil: comprehensively document the interface of export I want to make some improvements here, but in order to make future patches easier to review I want to document the current state of the world.

tests: hide warning from test-xdg.t The test-xdg.t test uses the system hgrc because it unsets HGRCPATH. If the system has an extension enabled that doesn't work with the development version of Mercurial it prints an 'extension failed to load' warning. Let's just hide that by piping stderr to /dev/null.

policy: define C module versions individually This allows us to bump the version for a single module without changing all of them.

repoview: rename '_getdynamicblockers' to 'revealedrevs' (API) Recent mailing list discussion made me realised we could clarify these. We make the function "public" to encourage extensions to wrap it and we use a more explicit name that mirror "hideablerevs".

repoview: move '_getdynamicblock' next to 'hideablerevs' There are the two functions that extensions should use to augment the hidding logic. It seem better to have them together at the top of the file.

python3: allow hgloader to work with lazy loaders Don't clobber the loader returned from find_spec. This brings `hg version` down from 0.27 seconds to 0.17.

init: turn on demandimport for Python 3.6 and above This uses the new demandimport implementation for Python 3 introduced in previous patches. This doesn't yet enhance performance because it isn't integrated with the custom source file loader we use on Python 3. We'll integrate the two in upcoming patches.

demandimport: add python 3 implementation This implementation uses the new importlib finder/loader functionality available in Python 3.5 and up. # no-check-commit

demandimport: move ignore list to __init__.py We're going to use the same ignore list for Python 3.

check: check modules in hgdemandimport A few places only check modules in mercurial and hgext. Add hgdemandimport to the list in those places.

demandimport: move to separate package In Python 3, demand loading is per-package. Keeping demandimport in the mercurial package would disable demand loading for any modules in mercurial.

import-checker: add a way to directly import certain symbols We'll use this for the 'demandimport' symbol in an upcoming patch.

check-code: allow skipping hasattr check in py3-only code hasattr is safe in Python 3, and in an upcoming patch we can't use util.safehasattr.

profiling: allow loading profiling extension before everything else 6d642ecf1a89 makes profiler start early without loading extensions. That makes it impossible for an extension to add customized profilers. This patch adds a special case: if a profiler is not found but an extension with the same name could be loaded, load that extension first, and expect it to have a "profile" contextmanager method. This allows customized profilers and extension setup time is still profiled.

extensions: allow loading a whitelisted subset of extensions This feature will be used by the next patch.

match: catch attempts to create case-insenstive exact matchers Exact matchers are only created internally (as opposed to from user input) based on a set of files that the caller collected before, so they should always match the list exactly (i.e. case-sensitively).

test: remove aliases forcing date, use default-date Now that we have the default-date by default and all code have been updated, remove the old commands alias that forced the date as they are not longer useful. Writing tests now should be easier for everyone now that all dates should be stable.

test: prepare tests for removing date aliases In the next patch, I'm gonna removing the global command aliases that force the epoch date but some tests either fail or their output change after that. Instead I'm copying the needed aliases in the test files that will otherwise change. Update test-rebase-obsolete.t because a revision hash is based on the epoch date after a 'commit --amend' and the output will change after removing date aliases. Update test-subrepo-git.t as the git subrepo doesn't use traditional date mechanisms. I'm not sure that updating the git subrepo to support default-date make sense. Add the commit alias to the test in order for making it pass after removing the date aliases globally.

devel: update blackbox to use default-date Blackbox now obeys the 'devel.default-date' option. As a side effect we can delete the mock for blackblox related tests.

devel: use default-date config field when creating obsmarkers Also use the default-date when creating obsmarkers. Currently they are created with the current date and without any option to force their value. To test the feature, we remove some of the many 'glob' used to match obsmarker date in the tests.

devel: activate default-date in tests It will make writing future tests more easier for everyone as we won't need to glob dates anymore in tests.

devel: add a config field to force dates to timestamp 0 Add a new config field named default-date under the devel section to force all implicits date to a specific value. If a explicit date is passed, it will override the default. This patch only affect changesets. Other usages (blackbox, obsmarkers) are updated in later patchs. The test runner is setting a bunch of alias to force the '--date' argument. We will replace theses aliases in a later patch.