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112 lines
3.3 KiB
Python
112 lines
3.3 KiB
Python
# -*- Mode: Python -*-
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# vi:si:et:sw=4:sts=4:ts=4
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#
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# gst-python
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# Copyright (C) 2009 Alessandro Decina <alessandro.decina@collbora.co.uk>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Library General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Library General Public License for more details.
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#
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# You should have received a copy of the GNU Library General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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#
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# Author: Alessandro Decina <alessandro.decina@collabora.co.uk>
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# importer for uninstalled setup, see PEP
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# http://www.python.org/dev/peps/pep-0302/
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import os
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import sys
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import imp
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class Loader(object):
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def __init__(self, fileobj, filename, description):
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self.fileobj = fileobj
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self.filename = filename
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self.description = description
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def find_real_filename(self):
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dlname = None
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installed = False
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for line in self.fileobj:
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if len(line) > 7 and line[:7] == 'dlname=':
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dlname = line[8:-2]
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elif len(line) > 10 and line[:10] == 'installed=':
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installed = line[10:-1] == 'yes'
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if not dlname:
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return None
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if installed or os.path.dirname(self.filename).endswith('.libs'):
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filename = os.path.join(os.path.dirname(self.filename), dlname)
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else:
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filename = os.path.join(os.path.dirname(self.filename), '.libs', dlname)
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return filename
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def load_module(self, name):
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try:
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module = sys.modules[name]
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self.fileobj.close()
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return module
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except KeyError:
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pass
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filename = self.find_real_filename()
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self.fileobj.close()
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if filename is None:
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raise ImportError("No module named %s" % name)
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fileobj = file(filename, 'rb')
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module = imp.new_module(name)
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sys.modules[name] = module
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imp.load_module(name, fileobj, filename, self.description)
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fileobj.close()
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return module
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class Importer(object):
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def find_module(self, name, path=None):
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if path is None:
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path = sys.path
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for directory in path:
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fileobj, filename, description = self.find_libtool_module(name, directory)
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if fileobj is not None:
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return Loader(fileobj, filename, description)
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return None
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def find_libtool_module(self, name, directory):
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name = name.split(".")[-1]
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absname = os.path.join(directory, name)
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for suffix in ('.la', '.module.la'):
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filename = absname + suffix
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try:
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fileobj = file(filename, 'rb')
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except IOError:
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continue
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return fileobj, filename, (suffix, 'rb', imp.C_EXTENSION)
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return None, None, None
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importer = Importer()
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def install():
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sys.meta_path.append(importer)
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def uninstall():
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sys.meta_path.remove(importer)
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