policy: remove unused policynoc and policynocffi constants

cffi: remove superfluous "if True" blocks

cffi: split modules from pure The copyright lines are updated per change history. cffi/osutil.py isn't tested since I have no access to OS X machine right now, sorry.

policy: extend API version checks for cffi This is just a stub for future extension. I could add a version constant to CFFI modules by putting it to both ffi.set_source() and ffi.cdef(), but that doesn't seem right. So for now, cffi modules will be explicitly unversioned (i.e. version constant must be undefined or set to None.) We can revisit it later when we need to consider CFFI support more seriously.

filterpyflakes: allow reexporting pure symbols from cffi modules cffi modules will do 'from ..pure.<module> import *'.

import-checker: guess names of C extension modules Since extension modules aren't included in the list of source files, they need to be populated somehow. Otherwise the import from cext/cffi would be treated as a global one.

import-checker: convert localmods to a set of module names This makes it easy to add a source-less module name to the set.

import-checker: allow importing symbols from pure modules This allows us to re-export pure functions from cffi modules: # mercurial/cffi/base85.py from ..pure.base85 import *

cffi: put compiled modules into mercurial.cffi package Don't pollute the top-level namespace.

cffi: rename build scripts This frees up cffi package for modules to be split from pure.

match: remove support for includes from patternmatcher Includes (and excludes) are now delegated to the includematcher.

match: simplify includematcher a bit The "include" we have in symbols is redundant and the double negative in visitdir() can be removed.

match: remove support for non-include patterns from includematcher The includematcher will always get at least one include pattern and will never get any non-include patterns, so we can remove most of the code in it. This patch does mostly straight-forward deletions of code. We will clean up further later.

match: split up main matcher into patternmatcher and includematcher At this point the includematcher is an exact copy of the main matcher class. We will specialize and simplify both classes in the following patches. This initial unmodified copy is just to make the differences clearer. We also rename the main matcher to "patternmatcher" for consistency. I may eventually merge this new includematcher back into the main matcher, but I think doing it this way makes the intermediate steps clearer regardless.

match: remove support for exact matching from main matcher class Exact matching is now handled by the exactmatcher class. We can safely remove _files from the __repr__() implementation, because even though the field is set, the patternspat field is enough for the representation to be unambiguous (which was not the case when the matcher could handle exact matches).

match: handle exact matching using new exactmatcher