bitbake: toaster: add commands to list and delete builds

We add Django commands for the manage.py to manage the database
content.

The two commands added are:
* buildslist - produces a list of current builds
* builddelete - deletes a build and all associated data from the database

(Bitbake rev: e9a8c32512bb270cda3dee4a3ed5fd22204c24bc)

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastermain/management/commands/builddelete.py

@@ -0,0 +1,33 @@
+from django.core.management.base import BaseCommand, CommandError
+from orm.models import Build
+import os
+
+
+
+class Command(BaseCommand):
+    args    = "buildId"
+    help    = "Deletes selected build"
+
+    def handle(self, buildId, *args, **options):
+        b = Build.objects.get(pk = buildId)
+        # theoretically, just b.delete() would suffice
+        # however SQLite runs into problems when you try to
+        # delete too many rows at once, so we delete some direct
+        # relationships from Build manually.
+
+        for t in b.target_set.all():
+            t.delete()
+        for t in b.task_build.all():
+            t.delete()
+        for p in b.package_set.all():
+            p.delete()
+        for lv in b.layer_version_build.all():
+            lv.delete()
+        for v in b.variable_build.all():
+            v.delete()
+        for l in b.logmessage_set.all():
+            l.delete()
+
+        # this should take care of the rest
+        b.delete()
+

bitbake/lib/toaster/toastermain/management/commands/buildslist.py

@@ -0,0 +1,13 @@
+from django.core.management.base import NoArgsCommand, CommandError
+from orm.models import Build
+import os
+
+
+
+class Command(NoArgsCommand):
+    args    = ""
+    help    = "Lists current builds"
+
+    def handle_noargs(self,**options):
+        for b in Build.objects.all():
+            print "%d: %s %s %s" % (b.pk, b.machine, b.distro, ",".join([x.target for x in b.target_set.all()]))