Tony Breeds 8bc094cf9e Ignore empty requirements/constraints when building lower-constraints
Some constraints files[1] contain valid data but we want to ignore them
when generating a combined lower-constraints.txt, rather than erroring
out:

 [tony@thor requirements]$ time .tox/venv/bin/build-lower-constraints ../*/lower-constraints.txt > tjmaxx.txt
 Traceback (most recent call last):
   File ".tox/venv/bin/build-lower-constraints", line 10, in <module>
     sys.exit(main())
   File "/home/tony/projects/openstack/openstack/requirements/openstack_requirements/cmds/build_lower_constraints.py", line 71, in main
     merged = list(merge_constraints_sets(constraints_sets))
   File "/home/tony/projects/openstack/openstack/requirements/openstack_requirements/cmds/build_lower_constraints.py", line 53, in merge_constraints_sets
     val = max((c[0] for c in constraints), key=get_requirements_version)
   File "/home/tony/projects/openstack/openstack/requirements/openstack_requirements/cmds/build_lower_constraints.py", line 43, in get_requirements_version
     raise ValueError('could not find version for {}'.format(req))
 ValueError: could not find version for Requirement(package='', location='', specifiers='', markers='', comment='# flake8==2.5.5', extras=frozenset())

Let's just ignore comments in those files.

[1] http://git.openstack.org/cgit/openstack/zaqar/tree/lower-constraints.txt#n28

Change-Id: Ie347ab273a1b239d9d264704482d3202dc4e4c74
2018-07-05 09:48:55 +10:00
..
2015-06-29 15:27:25 +12:00
2017-10-26 13:56:11 +02:00
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