eups distrib permissions problem with SELinux

[jdswinbank]

I'm trying to use eups distrib on a system which is running SELinux (for reasons outside my control).

My eups distrib install commands always fail with an error like:

eups distrib: Failed to build apr_util-1.5.4.eupspkg: [Errno 13] Permission denied: '/tigress/HSC/LSST/stack_perseus_2017-10-21/stack/miniconda3-4.3.21-10a4fa6/Linux64/apr_util/1.5.4/ups/build.log'

This is arising from the use of shutil.copy2() to copy the log file. This is trying to copy particular SELinux attributes, which apparently the system takes issue with. In particular, the origin of the above boils down to this call which is made by copy2():

(Pdb) os.setxattr("/tigress/HSC/LSST/stack_perseus_2017-10-21/stack/miniconda3-4.3.21-10a4fa6/Linux64/apr_util/1.5.4/ups/build.log", "security.selinux", b'unconfined_u:object_r:unlabeled_t:s0\x00')
*** PermissionError: [Errno 13] Permission denied: '/tigress/HSC/LSST/stack_perseus_2017-10-21/stack/miniconda3-4.3.21-10a4fa6/Linux64/apr_util/1.5.4/ups/build.log'

I don't think the use of copy2() here is actually buying us anything: the metadata is of no obvious value. Any objections to simply turning this into a copy() instead?