add version handler

cartoview/__init__.py

@@ -5,5 +5,5 @@
 
 
 def get_current_version():
-    import geonode.version
-    return geonode.version.get_version(__version__)
+    from .version import get_version
+    return get_version(__version__)

cartoview/version.py

@@ -1,8 +1,75 @@
+import datetime
 import json
+import os
+import subprocess
+from cartoview import __compatible_with__, __version__
 
-from geonode.version import get_version
+# -*- coding: utf-8 -*-
+#########################################################################
+#
+# Copyright (C) 2016 OSGeo
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#########################################################################
 
-from cartoview import __compatible_with__, __version__
+
+def get_version(version=None):
+    "Returns a PEP 386-compliant version number from VERSION."
+    if version is None:
+        from cartoview import __version__ as version
+    else:
+        assert len(version) == 5
+        assert version[3] in ('unstable', 'beta', 'rc', 'final')
+
+    # Now build the two parts of the version number:
+    # main = X.Y[.Z]
+    # sub = .devN - for pre-alpha releases
+    #     | {a|b|c}N - for alpha, beta and rc releases
+
+    parts = 2 if version[2] == 0 else 3
+    main = '.'.join(str(x) for x in version[:parts])
+
+    sub = ''
+    if version[3] == 'unstable':
+        git_changeset = get_git_changeset()
+        if git_changeset:
+            sub = '.dev%s' % git_changeset
+
+    elif version[3] != 'final':
+        mapping = {'beta': 'b', 'rc': 'rc'}
+        sub = mapping[version[3]] + str(version[4])
+
+    return main + sub
+
+
+def get_git_changeset():
+    """Returns a numeric identifier of the latest git changeset.
+    The result is the UTC timestamp of the changeset in YYYYMMDDHHMMSS format.
+    This value isn't guaranteed to be unique, but collisions are very unlikely,
+    so it's sufficient for generating the development version numbers.
+    """
+    repo_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+    git_show = subprocess.Popen('git show --pretty=format:%ct --quiet HEAD',
+                                stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+                                shell=True, cwd=repo_dir, universal_newlines=True)
+    timestamp = git_show.communicate()[0].partition('\n')[0]
+    try:
+        timestamp = datetime.datetime.utcfromtimestamp(int(timestamp))
+    except ValueError:
+        return None
+    return timestamp.strftime('%Y%m%d%H%M%S')
 
 
 def get_current_version():