Merge branch 'versiontest' into 'NIFTy_4'

Create exact git version information in setup.py

See merge request ift/NIFTy!229

.gitignore

-# custom 
+# never store the git version file
+git_version.py
+
+# custom
 setup.cfg
 .idea
 .DS_Store

docs/source/conf.py

@@ -82,9 +82,9 @@ author = u'Theo Steininger / Martin Reinecke'
 # built documents.
 #
 # The short X.Y version.
-version = u'3.9'
+version = u'4.0'
 # The full version, including alpha/beta/rc tags.
-release = u'3.9.0'
+release = u'4.0.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

nifty4/version.py

@@ -2,4 +2,13 @@
 # 1) we don't load dependencies by storing it in __init__.py
 # 2) we can import it in setup.py for the same reason
 # 3) we can import it into your module module
-__version__ = '3.9.0'
+
+__version__ = '4.0.0'
+
+
+def gitversion():
+    try:
+        from .git_version import gitversion
+    except ImportError:
+        return "unknown"
+    return gitversion

setup.py

@@ -18,6 +18,17 @@
 
 from setuptools import setup, find_packages
 
+
+def write_version():
+    import subprocess
+    p = subprocess.Popen(["git", "describe", "--dirty", "--tags"],
+                         stdout=subprocess.PIPE)
+    res = p.communicate()[0].strip().decode('utf-8')
+    with open("nifty4/git_version.py", "w") as file:
+        file.write('gitversion = "{}"\n'.format(res))
+
+
+write_version()
 exec(open('nifty4/version.py').read())
 
 setup(name="nifty4",