strip: introduce a soft strip option
This is the first user-accessible way to use the archived phase introduced in
4.8. This implements a feature discussed during the Stockholm sprint, using
the archived phase for hiding changesets.
The archived phase behaves exactly as stripping: changesets are no longer
visible, but pulling/unbundling them will make then reappear. The only notable
difference is that unlike hard stripping, soft stripping does not affect
obsmarkers.
The next changeset will make use of the archived phase for history rewriting
command. However, having a way to manually trigger the feature first seems a
necessary step before exposing users to this phase; there is a way to
un-archived changesets (unbundling), so there must be a way to archive them
again.
Adding a flag to strip is a good way to provide access to the feature without
taking a too big risk on the final UI we want. The flag is experimental so it
won't be exposed by default.
Using the archived phase is faster and less traumatic for the repository than
actually stripping changesets.
# hgdemandimport - global demand-loading of modules for Mercurial
#
# Copyright 2017 Facebook Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
'''demandimport - automatic demand-loading of modules'''
# This is in a separate package from mercurial because in Python 3,
# demand loading is per-package. Keeping demandimport in the mercurial package
# would disable demand loading for any modules in mercurial.
from __future__ import absolute_import
import os
import sys
if sys.version_info[0] >= 3:
from . import demandimportpy3 as demandimport
else:
from . import demandimportpy2 as demandimport
# Full module names which can't be lazy imported.
# Extensions can add to this set.
IGNORES = {
'__future__',
'_hashlib',
# ImportError during pkg_resources/__init__.py:fixup_namespace_package
'_imp',
'_xmlplus',
'fcntl',
'nt', # pathlib2 tests the existence of built-in 'nt' module
'win32com.gen_py',
'win32com.shell', # 'appdirs' tries to import win32com.shell
'_winreg', # 2.7 mimetypes needs immediate ImportError
'pythoncom',
# imported by tarfile, not available under Windows
'pwd',
'grp',
# imported by profile, itself imported by hotshot.stats,
# not available under Windows
'resource',
# this trips up many extension authors
'gtk',
# setuptools' pkg_resources.py expects "from __main__ import x" to
# raise ImportError if x not defined
'__main__',
'_ssl', # conditional imports in the stdlib, issue1964
'_sre', # issue4920
'rfc822',
'mimetools',
'sqlalchemy.events', # has import-time side effects (issue5085)
# setuptools 8 expects this module to explode early when not on windows
'distutils.msvc9compiler',
'__builtin__',
'builtins',
'urwid.command_map', # for pudb
}
_pypy = '__pypy__' in sys.builtin_module_names
if _pypy:
# _ctypes.pointer is shadowed by "from ... import pointer" (PyPy 5)
IGNORES.add('_ctypes.pointer')
demandimport.init(IGNORES)
# Re-export.
isenabled = demandimport.isenabled
disable = demandimport.disable
deactivated = demandimport.deactivated
def enable():
# chg pre-imports modules so do not enable demandimport for it
if ('CHGINTERNALMARK' not in os.environ
and os.environ.get('HGDEMANDIMPORT') != 'disable'):
demandimport.enable()