Hello all,
The last SWIG release (3.0.10, release in June) introduced an
incompatibility in the way the Python wrapper loads its C module, as
described in SWIG ChangeLog [1]. This breaks "import selinux" on systems
running Arch Linux:
$ python
Python 3.5.2 (default, Jun 28 2016, 08:46:01)
[GCC 6.1.1 20160602] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import selinux
Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/selinux/__init__.py", line
18, in swig_import_helper
return importlib.import_module(mname)
File "/usr/lib/python3.5/importlib/__init__.py", line 126, in
import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 986, in _gcd_import
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 956, in
_find_and_load_unlocked
ImportError: No module named '_selinux'
As far as I understand, SWIG no longer supports that its generated
Python module is renamed "__init__.py": the generated function
swig_import_helper() tries to import _selinux right outside of the
selinux module instead of importing "selinux._selinux" (cf. [2] for the
code of this function). When I replace "return
importlib.import_module(mname)" with "return
importlib.import_module('selinux._selinux')" it works as expected.
In short, renaming selinux.py to __init__.py in install-pywrap target
[3] no longer works. The most simple way to fix this seems to be to keep
the SWIG-generated selinux.py named selinux.py and to create a new
__init__.py file in $(PYLIBDIR)/site-packages/selinux/ with "from
selinux.selinux import *" in it. Would such a fix be acceptable?
Thanks,
Nicolas
[1] https://github.com/swig/swig/blob/rel-3.0.10/CHANGES.current
[2]
https://github.com/swig/swig/blob/rel-3.0.10/Source/Modules/python.cxx#L822-L873
[3]
https://github.com/SELinuxProject/selinux/blob/libselinux-2.5/libselinux/src/Makefile#L160
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