Added management command to scrub mdc events.

gracedb/management/commands/scrub_mdc_events.py

+import os, shutil
+from django.core.management.base import NoArgsCommand
+from gracedb.models import Event, Search, Pipeline, Group
+
+class Command(NoArgsCommand):
+    help = "I kill the MDC events."
+
+    def handle_noargs(self, **options):
+        """
+        Note! This needs to be run as root. The reason is that these
+        directories are owned by www-data. And the 'gracedb' user 
+        doesn't have sudo.
+        """
+        CBC = Group.objects.get(name='CBC')
+        gstlal = Pipeline.objects.get(name='gstlal')
+        MDC = Search.objects.get(name='MDC')
+
+        events = Event.objects.filter(group=CBC, pipeline=gstlal, search=MDC)
+
+        for e in events:
+            datadir = e.datadir()
+            graceid = e.graceid()
+            print "Deleting %s, %s" % (graceid, datadir)
+            # First we need to clean up the data directory
+            # Note. rmtree with throw OSError if the datadir is a softlink.
+            # Even though there are softlinks farther up the chain, the leafdir
+            # in question here can be removed by rmtree.
+            if os.path.isdir(datadir):
+                shutil.rmtree(datadir)
+
+            # Uhm. For debugging purposes, did we get it?
+            if os.path.isdir(datadir):
+                print 'Problem! Have not deleted datadir %s' % datadir
+                exit(1)
+
+            # Now, say goodbye to the database entry
+            # Does this delete annotations too? That's something to test.
+            e.delete()
+