comparison hgdemandimport/demandimportpy3.py @ 43076:2372284d9457

formatting: blacken the codebase

This is using my patch to black
(https://github.com/psf/black/pull/826) so we don't un-wrap collection
literals.

Done with:

  hg files 'set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"' | xargs black -S

# skip-blame mass-reformatting only

# no-check-commit reformats foo_bar functions

Differential Revision: https://phab.mercurial-scm.org/D6971

43075:57875cf423c9

from . import tracing

_deactivated = False

class _lazyloaderex(importlib.util.LazyLoader):
    """This is a LazyLoader except it also follows the _deactivated global and
    the ignore list.
    """
    def exec_module(self, module):
        """Make the module load lazily."""
        with tracing.log('demandimport %s', module):
            if _deactivated or module.__name__ in ignores:
                self.loader.exec_module(module)
            else:
                super().exec_module(module)

# This is 3.6+ because with Python 3.5 it isn't possible to lazily load
# extensions. See the discussion in https://bugs.python.org/issue26186 for more.
_extensions_loader = _lazyloaderex.factory(
    importlib.machinery.ExtensionFileLoader)
_bytecode_loader = _lazyloaderex.factory(
    importlib.machinery.SourcelessFileLoader)
_source_loader = _lazyloaderex.factory(importlib.machinery.SourceFileLoader)

def _makefinder(path):
    return importlib.machinery.FileFinder(
        path,
        # This is the order in which loaders are passed in in core Python.
        (_extensions_loader, importlib.machinery.EXTENSION_SUFFIXES),
        (_source_loader, importlib.machinery.SOURCE_SUFFIXES),
        (_bytecode_loader, importlib.machinery.BYTECODE_SUFFIXES),
    )

ignores = set()

def init(ignoreset):
    global ignores
    ignores = ignoreset

def isenabled():
    return _makefinder in sys.path_hooks and not _deactivated

def disable():
    try:
        while True:
            sys.path_hooks.remove(_makefinder)
    except ValueError:
        pass

def enable():
    sys.path_hooks.insert(0, _makefinder)

@contextlib.contextmanager
def deactivated():
    # This implementation is a bit different from Python 2's. Python 3
    # maintains a per-package finder cache in sys.path_importer_cache (see

43076:2372284d9457

from . import tracing

_deactivated = False


class _lazyloaderex(importlib.util.LazyLoader):
    """This is a LazyLoader except it also follows the _deactivated global and
    the ignore list.
    """

    def exec_module(self, module):
        """Make the module load lazily."""
        with tracing.log('demandimport %s', module):
            if _deactivated or module.__name__ in ignores:
                self.loader.exec_module(module)
            else:
                super().exec_module(module)


# This is 3.6+ because with Python 3.5 it isn't possible to lazily load
# extensions. See the discussion in https://bugs.python.org/issue26186 for more.
_extensions_loader = _lazyloaderex.factory(
    importlib.machinery.ExtensionFileLoader
)
_bytecode_loader = _lazyloaderex.factory(
    importlib.machinery.SourcelessFileLoader
)
_source_loader = _lazyloaderex.factory(importlib.machinery.SourceFileLoader)


def _makefinder(path):
    return importlib.machinery.FileFinder(
        path,
        # This is the order in which loaders are passed in in core Python.
        (_extensions_loader, importlib.machinery.EXTENSION_SUFFIXES),
        (_source_loader, importlib.machinery.SOURCE_SUFFIXES),
        (_bytecode_loader, importlib.machinery.BYTECODE_SUFFIXES),
    )


ignores = set()


def init(ignoreset):
    global ignores
    ignores = ignoreset


def isenabled():
    return _makefinder in sys.path_hooks and not _deactivated


def disable():
    try:
        while True:
            sys.path_hooks.remove(_makefinder)
    except ValueError:
        pass


def enable():
    sys.path_hooks.insert(0, _makefinder)


@contextlib.contextmanager
def deactivated():
    # This implementation is a bit different from Python 2's. Python 3
    # maintains a per-package finder cache in sys.path_importer_cache (see