Add exportbranches command for PDC.

roles/pdc/frontend/files/exportbranches.py

@@ -0,0 +1,15 @@
+import json
+
+from django.core.management.base import BaseCommand
+from pdc.apps.componentbranch.models import ComponentBranch
+from pdc.apps.componentbranch.serializers import is_branch_active
+
+class Command(BaseCommand):
+    help = 'Export a JSON file with information about all component branches'
+
+    def handle(self, *args, **options):
+        all_entries = ComponentBranch.objects.all()
+        exported = [e.export() for e in all_entries]
+        for i, entry in enumerate(all_entries):
+            exported[i]['active'] = is_branch_active(entry)
+        self.stdout.write(json.dumps(exported, indent=2))