mercurial/packagescan.py
author Matt Mackall <mpm@selenic.com>
Wed, 02 Nov 2005 20:09:19 -0800
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child 1841 7f12a63568ae
permissions -rw-r--r--
Handle empty logs in repo.checksize
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# packagescan.py - Helper module for identifing used modules.
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# Used for the py2exe distutil.
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#
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# Copyright 2005 Volker Kleinfeld <Volker.Kleinfeld@gmx.de>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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import glob
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import os
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import sys
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import demandload
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import ihooks
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requiredmodules = {} # Will contain the modules imported by demandload
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def demandload(scope, modules):
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    """ fake demandload function that collects the required modules """
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    for m in modules.split():
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        mod = None
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        mod = __import__(m,scope,scope)
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        scope[m] = mod
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        requiredmodules[mod.__name__] = 1
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def getmodules(libpath,packagename):
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    """ helper for finding all required modules of package <packagename> """
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    # Use the package in the build directory
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    libpath = os.path.abspath(libpath)
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    sys.path.insert(0,libpath)
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    packdir = os.path.join(libpath,packagename)
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    # A normal import would not find the package in
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    # the build directory. ihook is used to force the import.
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    # After the package is imported the import scope for
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    # the following imports is settled.
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    p = importfrom(packdir)
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    globals()[packagename] = p
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    sys.modules[packagename] = p
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    # Fetch the python modules in the package
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    cwd = os.getcwd()
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    os.chdir(packdir)
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    pymodulefiles = glob.glob('*.py')
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    extmodulefiles = glob.glob('*.pyd')
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    os.chdir(cwd)
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    # Install a fake demandload module
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    sys.modules['mercurial.demandload'] = sys.modules['mercurial.packagescan']
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    # Import all python modules and by that run the fake demandload
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    for m in pymodulefiles:
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        if m == '__init__.py': continue
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        tmp = {}
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        mname,ext = os.path.splitext(m)
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        fullname = packagename+'.'+mname
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        __import__(fullname,tmp,tmp)
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        requiredmodules[fullname] = 1
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    # Import all extension modules and by that run the fake demandload
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    for m in extmodulefiles:
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        tmp = {}
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        mname,ext = os.path.splitext(m)
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        fullname = packagename+'.'+mname
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        __import__(fullname,tmp,tmp)
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        requiredmodules[fullname] = 1
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    includes = requiredmodules.keys()
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    return includes
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def importfrom(filename):
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    """
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    import module/package from a named file and returns the module.
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    It does not check on sys.modules or includes the module in the scope.
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    """
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    loader = ihooks.BasicModuleLoader()
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    path, file = os.path.split(filename)
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    name, ext  = os.path.splitext(file)
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    m = loader.find_module_in_dir(name, path)
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    if not m:
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        raise ImportError, name
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    m = loader.load_module(name, m)
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    return m