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81 lines
3.2 KiB
81 lines
3.2 KiB
#
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# startup.py - code used during early startup with minimal dependencies
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#
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# Copyright (C) 2014 Red Hat, Inc.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions of
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# the GNU General Public License v.2, or (at your option) any later version.
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY expressed or implied, including the implied warranties of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details. You should have received a copy of the
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# GNU General Public License along with this program; if not, write to the
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# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
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# source code or documentation are not subject to the GNU General Public
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# License and may only be used or replicated with the express permission of
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# Red Hat, Inc.
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#
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# Red Hat Author(s): Martin Kolman <mkolman@redhat.com>
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#
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import imp
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def module_exists(module_path):
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"""Report is a given module exists in the current module import pth or not.
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Supports checking bot modules ("foo") os submodules ("foo.bar.baz")
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:param str module_path: (sub)module identifier
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:returns: True if (sub)module exists in path, False if not
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:rtype: bool
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"""
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module_path_components = module_path.split(".")
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module_name = module_path_components.pop()
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parent_module_path = None
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if module_path_components:
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# the path specifies a submodule ("bar.foo")
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# we need to chain-import all the modules in the submodule path before
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# we can check if the submodule itself exists
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for name in module_path_components:
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module_info = imp.find_module(name, parent_module_path)
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module = imp.load_module(name, *module_info)
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if module:
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parent_module_path = module.__path__
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else:
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# one of the parents was not found, abort search
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return False
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# if we got this far we should have either some path or the module is
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# not a submodule and the default set of paths will be used (path=None)
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try:
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# if the module is not found imp raises an ImportError
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imp.find_module(module_name, parent_module_path)
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return True
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except ImportError:
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return False
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def get_anaconda_version_string():
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"""Return a string describing current Anaconda version.
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If the current version can't be determined the string
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"unknown" will be returned.
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:returns: string describing Anaconda version
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:rtype: str
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"""
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# we are importing the version module directly so that we don't drag in any
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# non-necessary stuff; we also need to handle the possibility of the
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# import itself failing
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if module_exists("pyanaconda.version"):
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# Ignore pylint not finding the version module, since thanks to automake
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# there's a good chance that version.py is not in the same directory as
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# the rest of pyanaconda.
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from pyanaconda import version # pylint: disable=no-name-in-module
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return version.__version__
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else:
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return "unknown"
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