view mercurial/packagescan.py @ 1740:f95654385065

add --daemon option to serve command. for issue 45.
code looks odd because it is portable to windows. windows does not have
os.fork, so have to spawn and use pipe to tell parent ready instead.

# 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
        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