Merge pull request #6 from sot/Ska.quatutil

Implementation of setuptools_scm usage as described in sot/skare3/issues/240

.git_archival.txt

@@ -0,0 +1 @@
+ref-names: $Format:%D$

.gitattributes

@@ -0,0 +1 @@
+.git_archival.txt  export-subst

Ska/quatutil/quatutil.py

@@ -3,6 +3,10 @@
 from numpy import sin, cos, tan, arctan2, radians, degrees, sqrt
 from Quaternion import Quat
 
+import ska_helpers
+
+__version__ = ska_helpers.get_version(__package__)
+
 
 def radec2eci(ra, dec):
     """

setup.py

@@ -1,8 +1,6 @@
 # Licensed under a 3-clause BSD style license - see LICENSE.rst
 from setuptools import setup
 
-from Ska.quatutil import __version__
-
 try:
     from testr.setup_helper import cmdclass
 except ImportError:
@@ -13,7 +11,8 @@
       description='ACA quaternion utilities',
       author_email='taldcroft@cfa.harvard.edu',
       url='http://cxc.harvard.edu/mta/ASPECT/tool_doc/pydocs/Ska.quatutil.html',
-      version=__version__,
+      use_scm_version=True,
+      setup_requires=['setuptools_scm', 'setuptools_scm_git_archive'],
       zip_safe=False,
       packages=['Ska', 'Ska.quatutil', 'Ska.quatutil.tests'],
       tests_require=['pytest'],