ENH: Use PEP440-compliant versioning, including for gitversion

Author: effigies

nipype/info.py

@@ -45,7 +45,7 @@ def get_nipype_gitversion():
 if __version__.endswith('-dev'):
     gitversion = get_nipype_gitversion()
     if gitversion:
-        __version__ = __version__.replace('-dev', '-' + gitversion + '.dev')
+        __version__ = '{}+{}'.format(__version__, gitversion)
 
 CLASSIFIERS = ['Development Status :: 5 - Production/Stable',
                'Environment :: Console',
@@ -141,7 +141,8 @@ def get_nipype_gitversion():
     'funcsigs',
     'pytest>=%s' % PYTEST_MIN_VERSION,
     'mock',
-    'pydotplus'
+    'pydotplus',
+    'packaging',
 ]
 
 if sys.version_info <= (3, 4):

nipype/interfaces/base.py

@@ -31,6 +31,7 @@
 from warnings import warn
 import simplejson as json
 from dateutil.parser import parse as parseutc
+from packaging.version import Version
 
 from .. import config, logging, LooseVersion, __version__
 from ..utils.provenance import write_provenance
@@ -43,7 +44,7 @@
 from ..external.due import due
 
 runtime_profile = str2bool(config.get('execution', 'profile_runtime'))
-nipype_version = LooseVersion(__version__)
+nipype_version = Version(__version__)
 iflogger = logging.getLogger('interface')
 
 FLOAT_FORMAT = '{:.10f}'.format
@@ -445,7 +446,7 @@ def _deprecated_warn(self, obj, name, old, new):
             else:
                 msg3 = ''
             msg = ' '.join((msg1, msg2, msg3))
-            if LooseVersion(str(trait_spec.deprecated)) < self.package_version:
+            if Version(str(trait_spec.deprecated)) < self.package_version:
                 raise TraitError(msg)
             else:
                 if trait_spec.new_name: