Fixed retrieving of commit index from vcs

Change-Id: Ic917f8f2bf734d7cb4a68eba325c686cbf7877d5

dashboard/templates/module_details.html

@@ -34,7 +34,7 @@
 
 {% block right_frame %}
 
-    <h2>Recent commits</h2>
+    <h2>Recent activity</h2>
 
     {% for rec in commits %}
         <div style="padding-bottom: 1em;">

dashboard/web.py

@@ -548,11 +548,17 @@ def timeline(records, **kwargs):
     week_stat_commits = dict((c, 0) for c in weeks)
     week_stat_commits_hl = dict((c, 0) for c in weeks)
 
+    param = get_parameter(kwargs, 'metric')
+    if ('reviews' in param) or ('marks' in param):
+        handler = lambda record: 0
+    else:
+        handler = lambda record: record['loc']
+
     # fill stats with the data
     for record in records:
         week = record['week']
         if week in weeks:
-            week_stat_loc[week] += record['loc']
+            week_stat_loc[week] += handler(record)
             week_stat_commits[week] += 1
             if 'all' in release_names or record['release'] in release_names:
                 week_stat_commits_hl[week] += 1

stackalytics/processor/vcs.py

@@ -100,6 +100,9 @@ class Git(Vcs):
         self.get_release_index()
 
     def get_release_index(self):
+        if not os.path.exists(self.folder):
+            return {}
+
         os.chdir(self.folder)
         if not self.release_index:
             for release in self.repo['releases']: