add versioneer to manage version number

.coveragerc

@@ -0,0 +1,6 @@
+# .coveragerc to control coverage.py
+[run]
+omit = 
+	test/*
+	versioneer.py
+	varcode/_version.py

.gitattributes

@@ -0,0 +1 @@
+varcode/_version.py export-subst

.travis.yml

@@ -55,3 +55,4 @@ deploy:
     secure: "H0prsAPV1n4ksLO0Zp4xq7SuGGRFmo9HhEcEtfPiSTyh8u4Zxbv/bPjyCLVDilBIKieQsuluV6jqoW6Px5LhUGZwq/k7RN7u1eNuahmpkIwWamjdsNORgvHte6inWNjKGo4GJLM232e2A50kkHnJKDZulfE8eGg4FrRQtfKSkik="
   on:
     branch: master
+    tags: true

MANIFEST.in

@@ -0,0 +1,2 @@
+include versioneer.py
+include varcode/_version.py

setup.cfg

@@ -0,0 +1,6 @@
+[versioneer]
+VCS = git
+style = pep440
+versionfile_source = varcode/_version.py
+versionfile_build = varcode/_version.py
+tag_prefix = 'v' 

setup.py

@@ -14,9 +14,9 @@
 
 from __future__ import print_function
 import os
-import re
 
 from setuptools import setup, find_packages
+import versioneer
 
 readme_filename = "README.md"
 current_directory = os.path.dirname(__file__)
@@ -37,20 +37,13 @@
     print(e)
     print("Failed to convert %s from Markdown to reStructuredText" % readme_filename)
 
-with open('varcode/__init__.py', 'r') as f:
-    version = re.search(
-        r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]',
-        f.read(),
-        re.MULTILINE).group(1)
-
-if not version:
-    raise RuntimeError("Cannot find version information")
 
 if __name__ == '__main__':
     setup(
         name='varcode',
         packages=find_packages(),
-        version=version,
+        version=versioneer.get_version(),
+        cmdclass=versioneer.get_cmdclass(),
         description="Variant annotation in Python",
         long_description=readme,
         url="https://github.com/hammerlab/varcode",

varcode/__init__.py

@@ -49,8 +49,6 @@
     ExonLoss,
 )
 
-__version__ = "0.4.7"
-
 __all__ = [
     # basic classes
     "Variant",
@@ -94,3 +92,7 @@
     "FrameShift",
     "ExonLoss",
 ]
+
+from ._version import get_versions
+__version__ = get_versions()['version']
+del get_versions