view mercurial/packagescan.py @ 2002:4aab906517c6

Calling revlog.addgroup with an empty changegroup now raises RevlogError.
The empty changegroup can be caused by remote servers dying soon after
findincoming, and further code in pull assumes (correctly) that there are
new changesets.

# packagescan.py - Helper module for identifing used modules.
# Used for the py2exe distutil.
#
# Copyright 2005 Volker Kleinfeld <[e-mail]>
#
# 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 demandload
import ihooks

requiredmodules = {} # Will contain the modules imported by demandload
def demandload(scope, modules):
    """ fake demandload function that collects the required modules """
    for m in modules.split():
        mod = None
        try:
            module, submodules = m.split(':')
            submodules = submodules.split(',')
        except:
            module = m
            submodules = []
        mod = __import__(module, scope, scope, submodules)
        scope[module] = mod
        requiredmodules[mod.__name__] = 1

def getmodules(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)
    # 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)
    # Install a fake demandload module
    sys.modules['mercurial.demandload'] = sys.modules['mercurial.packagescan']
    # 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
    includes = requiredmodules.keys()
    return includes

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