Invoke version_string in watcher/version.py directly

There is already define version_string in version.py
So we don't need generate version in other files, just call it.

Change-Id: I7d8294860523eedad92e213ad00569829e120c39

doc/ext/term.py

@@ -22,7 +22,7 @@ from docutils import nodes
 from docutils.parsers import rst
 from docutils import statemachine
 
-from watcher.version import version_info
+from watcher.version import version_string
 
 
 class BaseWatcherDirective(rst.Directive):
@@ -169,4 +169,4 @@ class WatcherFunc(BaseWatcherDirective):
 def setup(app):
     app.add_directive('watcher-term', WatcherTerm)
     app.add_directive('watcher-func', WatcherFunc)
-    return {'version': version_info.version_string()}
+    return {'version': version_string}

doc/source/conf.py

@@ -72,7 +72,7 @@ copyright = u'OpenStack Foundation'
 # The full version, including alpha/beta/rc tags.
 release = watcher_version.version_info.release_string()
 # The short X.Y version.
-version = watcher_version.version_info.version_string()
+version = watcher_version.version_string
 
 # A list of ignored prefixes for module index sorting.
 modindex_common_prefix = ['watcher.']

releasenotes/source/conf.py

@@ -63,7 +63,7 @@ copyright = u'2016, Watcher developers'
 # The short X.Y version.
 version = watcher_version.version_info.release_string()
 # The full version, including alpha/beta/rc tags.
-release = watcher_version.version_info.version_string()
+release = watcher_version.version_string
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

watcher/version.py

@@ -16,4 +16,4 @@
 import pbr.version
 
 version_info = pbr.version.VersionInfo('python-watcher')
-version_string = version_info.version_string
+version_string = version_info.version_string()