demandimport: stop overriding __getattribute__() Proxy __dict__ and __doc__ explicitly instead. I'm not sure which is less evil, but this seems slightly simpler than hooking all attribute accesses.

demandimport: look for 'mod' suffix as alternative name for module reference It's widely used in our codebase.

demandimport: insert empty line per method _demandmod class is getting bigger, and I don't want to put more things in a dense form.

demandimport: strictly compare identity of proxy object This looks better, and __eq__() may be overridden in an undesired way.

match: use ProgrammingError where appropriate

revlog: raise error.WdirUnsupported from revlog.node() if wdirrev is passed When we try to run, 'hg debugrevspec 'branch(wdir())'', it throws an index error and blows up. Lets raise the WdirUnsupported if wdir() is passed so that we can catch that later.

revset: add support for ancestors(wdir()) This is a part of extending support for wdir() predicate.

revset: add support for using ~ operator on wdir() predicate We catch the WdirUnsupported exception and handles the wdir() case here.

revset: add support for p2(wdir()) to get second parent of working directory This adds support for finding the second parent of working directory using the p2 predicate.

revset: use try-except instead of if-else because of perf For wdir(), we now raises an exception which will be raised when wdir() will be passed, so catching that exception is better checking for wdir() using if-else.

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.