revlog: fix revlogio.packentry corner case
We want to store version information about the revlog in the first
entry of its index. The code in packentry was using some heuristics
to detect whether this was the first entry, but these heuristics could
fail in some cases (e.g. rev 0 was empty; rev 1 descends directly from
the nullid and is stored as a delta).
We now give the revision number to packentry to avoid heuristics.
# extensions.py - extension handling for mercurial
#
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import imp, os
import util, sys
from i18n import _
_extensions = {}
_order = []
def extensions():
for name in _order:
module = _extensions[name]
if module:
yield name, module
def find(name):
'''return module with given extension name'''
try:
return _extensions[name]
except KeyError:
for k, v in _extensions.iteritems():
if k.endswith('.' + name) or k.endswith('/' + name):
return v
raise KeyError(name)
def load(ui, name, path):
if name.startswith('hgext.'):
shortname = name[6:]
else:
shortname = name
if shortname in _extensions:
return
_extensions[shortname] = None
if path:
# the module will be loaded in sys.modules
# choose an unique name so that it doesn't
# conflicts with other modules
module_name = "hgext_%s" % name.replace('.', '_')
if os.path.isdir(path):
# module/__init__.py style
d, f = os.path.split(path)
fd, fpath, desc = imp.find_module(f, [d])
mod = imp.load_module(module_name, fd, fpath, desc)
else:
mod = imp.load_source(module_name, path)
else:
def importh(name):
mod = __import__(name)
components = name.split('.')
for comp in components[1:]:
mod = getattr(mod, comp)
return mod
try:
mod = importh("hgext.%s" % name)
except ImportError:
mod = importh(name)
_extensions[shortname] = mod
_order.append(shortname)
uisetup = getattr(mod, 'uisetup', None)
if uisetup:
uisetup(ui)
def loadall(ui):
result = ui.configitems("extensions")
for i, (name, path) in enumerate(result):
if path:
path = os.path.expanduser(path)
try:
load(ui, name, path)
except (util.SignalInterrupt, KeyboardInterrupt):
raise
except Exception, inst:
ui.warn(_("*** failed to import extension %s: %s\n") %
(name, inst))
if ui.print_exc():
return 1