ansible: make domotica create user task idempotent

Only create the user if it doesn't already exist. We can now re-execute the
playbook.

diff --git a/ansible/roles/domotica/tasks/domotica.yaml b/ansible/roles/domotica/tasks/domotica.yaml
index cea5013..e905814 100644 (file)
--- a/ansible/roles/domotica/tasks/domotica.yaml
+++ b/ansible/roles/domotica/tasks/domotica.yaml
@@ -51,7 +51,15 @@
     - LD_LIBRARY_PATH: /home/kp/libs7comm/src/lib
     - DJANGO_SETTINGS_MODULE: domotica.settings
 - name: create user
-  shell: "cd /home/kp/domotica ; python manage.py shell -c 'from django.contrib.auth.models import User;user = User.objects.create_user(\"natalie\", \"natalie@sigsegv.be\", \"nienkeistwee\");user.save()'"
+  shell: |
+    cd /home/kp/domotica ; python manage.py shell -c '
+    import sys
+    from django.contrib.auth.models import User
+    if User.objects.get(username="natalie"):
+      sys.exit(0)
+    user = User.objects.create_user("natalie", "natalie@sigsegv.be", "nienkeistwee")
+    user.save()
+    '
   environment:
     - PYTHONPATH: /home/kp/libs7comm-python/
     - LD_LIBRARY_PATH: /home/kp/libs7comm/src/lib