# packagescan.py - Helper module for identifing used modules.

# Used for the py2exe distutil.

#

# 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 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

        mod = __import__(m,scope,scope)

        scope[m] = 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