Change the way versioning is included in setup.py #127

Using regular expressions should work so long as the pattern in
glymur/version.py does not change.

glymur/version.py

@@ -13,6 +13,8 @@ from distutils.version import LooseVersion
 from .lib import openjpeg as opj
 from .lib import openjp2 as opj2
 
+# Do not change the format of this next line!  Doing so risks breaking
+# setup.py
 version = "0.5.4"
 _sv = LooseVersion(version)
 version_tuple = _sv.version

setup.py

@@ -1,4 +1,6 @@
 from setuptools import setup, find_packages
+import os
+import re
 import sys
 
 kwargs = {'name': 'Glymur',
@@ -12,8 +14,7 @@ kwargs = {'name': 'Glymur',
           'package_data': {'glymur': ['data/*.jp2', 'data/*.j2k']},
           'scripts': ['bin/jp2dump'],
           'license': 'MIT',
-          'test_suite': 'glymur.test',
-          'version':  '0.5.4'}
+          'test_suite': 'glymur.test'}
 
 instllrqrs = ['numpy>=1.4.1']
 if sys.hexversion < 0x03030000:
@@ -39,4 +40,11 @@ clssfrs = ["Programming Language :: Python",
            "Topic :: Software Development :: Libraries :: Python Modules"]
 kwargs['classifiers'] = clssfrs
 
+# Get the version string.  Cannot do this by importing glymur!
+version_file = os.path.join('glymur', 'version.py')
+with open('glymur/version.py', 'rt') as fptr:
+    contents = fptr.read()
+    match = re.search('version\s*=\s*"(?P<version>\d*.\d*.\d*.*)"\n', contents)
+    kwargs['version'] = match.group('version')
+
 setup(**kwargs)