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# -*- Mode: Python; py-indent-offset: 4 -*-
# pygtk - Python bindings for the GTK+ widget set.
# Copyright (C) 1998-2002 James Henstridge
#
# pygtk.py: pygtk version selection code.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
import sys, os, re
__all__ = ['require']
_pygtk_dir_pat = re.compile(r'^gtk-([\d]+[\d\.]+)$')
def _get_available_versions():
versions = {}
for dir in sys.path:
if not dir: dir = os.getcwd()
if _pygtk_dir_pat.match(os.path.basename(dir)):
continue # if the dir is a pygtk dir, skip it
for filename in os.listdir(dir):
pathname = os.path.join(dir, filename)
if not os.path.isdir(pathname):
continue # skip non directories
match = _pygtk_dir_pat.match(filename)
if match and not versions.has_key(match.group(1)):
versions[match.group(1)] = pathname
return versions
def require(version):
assert not sys.modules.has_key('gtk'), \
"pygtk.require() must be called before importing gtk"
versions = _get_available_versions()
assert versions.has_key(version), \
"required version '%s' not found on system" % version
# remove any pygtk dirs first ...
for dir in sys.path:
if _pygtk_dir_pat.match(os.path.basename(dir)):
sys.path.remove(dir)
# prepend the pygtk path ...
sys.path.insert(0, versions[version])
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