extend network protocol to stop clients from locking servers
now all repositories have capabilities slot, tuple with list of names.
if 'unbundle' capability present, repo supports push where client does
not need to lock server. repository classes that have unbundle capability
also have unbundle method.
implemented for ssh now, will be base for push over http.
unbundle protocol acts this way. server tells client what heads it
has during normal negotiate step. client starts unbundle by repeat
server's heads back to it. if server has new heads, abort immediately.
otherwise, transfer changes to server. once data transferred, server
locks and checks heads again. if heads same, changes can be added.
else someone else added heads, and server aborts.
if client wants to force server to add heads, sends special heads list of
'force'.
# packagescan.py - Helper module for identifing used modules.
# Used for the py2exe distutil.
# This module must be the first mercurial module imported in setup.py
#
# Copyright 2005 Volker Kleinfeld <Volker.Kleinfeld@gmx.de>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import glob
import os
import sys
import ihooks
import types
import string
# Install this module as fake demandload module
sys.modules['mercurial.demandload'] = sys.modules[__name__]
# Requiredmodules contains the modules imported by demandload.
# Please note that demandload can be invoked before the
# mercurial.packagescan.scan method is invoked in case a mercurial
# module is imported.
requiredmodules = {}
def demandload(scope, modules):
""" fake demandload function that collects the required modules
foo import foo
foo bar import foo, bar
foo.bar import foo.bar
foo:bar from foo import bar
foo:bar,quux from foo import bar, quux
foo.bar:quux from foo.bar import quux"""
for m in modules.split():
mod = None
try:
module, fromlist = m.split(':')
fromlist = fromlist.split(',')
except:
module = m
fromlist = []
mod = __import__(module, scope, scope, fromlist)
if fromlist == []:
# mod is only the top package, but we need all packages
comp = module.split('.')
i = 1
mn = comp[0]
while True:
# mn and mod.__name__ might not be the same
scope[mn] = mod
requiredmodules[mod.__name__] = 1
if len(comp) == i: break
mod = getattr(mod,comp[i])
mn = string.join(comp[:i+1],'.')
i += 1
else:
# mod is the last package in the component list
requiredmodules[mod.__name__] = 1
for f in fromlist:
scope[f] = getattr(mod,f)
if type(scope[f]) == types.ModuleType:
requiredmodules[scope[f].__name__] = 1
def scan(libpath,packagename):
""" helper for finding all required modules of package <packagename> """
# Use the package in the build directory
libpath = os.path.abspath(libpath)
sys.path.insert(0,libpath)
packdir = os.path.join(libpath,packagename.replace('.', '/'))
# A normal import would not find the package in
# the build directory. ihook is used to force the import.
# After the package is imported the import scope for
# the following imports is settled.
p = importfrom(packdir)
globals()[packagename] = p
sys.modules[packagename] = p
# Fetch the python modules in the package
cwd = os.getcwd()
os.chdir(packdir)
pymodulefiles = glob.glob('*.py')
extmodulefiles = glob.glob('*.pyd')
os.chdir(cwd)
# Import all python modules and by that run the fake demandload
for m in pymodulefiles:
if m == '__init__.py': continue
tmp = {}
mname,ext = os.path.splitext(m)
fullname = packagename+'.'+mname
__import__(fullname,tmp,tmp)
requiredmodules[fullname] = 1
# Import all extension modules and by that run the fake demandload
for m in extmodulefiles:
tmp = {}
mname,ext = os.path.splitext(m)
fullname = packagename+'.'+mname
__import__(fullname,tmp,tmp)
requiredmodules[fullname] = 1
def getmodules():
return requiredmodules.keys()
def importfrom(filename):
"""
import module/package from a named file and returns the module.
It does not check on sys.modules or includes the module in the scope.
"""
loader = ihooks.BasicModuleLoader()
path, file = os.path.split(filename)
name, ext = os.path.splitext(file)
m = loader.find_module_in_dir(name, path)
if not m:
raise ImportError, name
m = loader.load_module(name, m)
return m