Add tag-based versioning for git archive support

.git_archival.txt

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

.gitattributes

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

proxmin/nmf.py

@@ -61,7 +61,7 @@ def step_pgm(*X, it=None, W=1):
  step_A, step_S
  """
  A, S = X
- if W is 1:
+ if W == 1:
  return step_A(A, S), step_S(A, S)
  else:
  C, K = A.shape

setup.py

@@ -1,21 +1,16 @@
-from setuptools import setup
+from setuptools import setup, find_packages
 import os
 
-packages = []
-for root, dirs, files in os.walk('.'):
- if not root.startswith('./build') and '__init__.py' in files:
- packages.append(root[2:])
-
 long_description = open('README.md').read()
 
 setup(
  name = 'proxmin',
  description = 'Proximal methods for constrained optimization',
  long_description = long_description,
  long_description_content_type='text/markdown',
- packages = packages,
+ packages=find_packages(),
  include_package_data=False,
- version = '0.6.9',
+ use_scm_version=True,
  license='MIT',
  author = 'Peter Melchior, Fred Moolekamp',
  author_email = 'peter.m.melchior@gmail.com',
@@ -30,5 +25,6 @@
  "Topic :: Scientific/Engineering :: Information Analysis"
  ],
  keywords = ['optimization', 'constrained optimization', 'proximal algorithms', 'data analysis', 'non-negative matrix factorization'],
- requires=['numpy','scipy']
+ setup_requires=['setuptools_scm', 'setuptools_scm_git_archive'],
+ install_requires=['numpy','scipy'],
 )