security: Move backports notice to security page

Move get_backports_in_use to upgrades.

Signed-off-by: James Valleroy <jvalleroy@mailbox.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/help/templates/help_about.html

@@ -74,17 +74,4 @@
       {% endblocktrans %}
     {% endif %}
   </p>
-
-  {% if backports_in_use %}
-    <h3>{% trans "Security Notice" %}</h3>
-    <p>
-      {% blocktrans trimmed %}
-        You are using packages from Debian backports. Please note that these
-        packages do not have security support from Debian. However, they are
-        maintained on a best-effort basis by contributors in Debian and
-        FreedomBox community.
-      {% endblocktrans %}
-    </p>
-  {% endif %}
-
 {% endblock %}

plinth/modules/help/views.py

@@ -6,7 +6,6 @@ Help app for FreedomBox.
 import mimetypes
 import os
 import pathlib
-import subprocess
 
 from apt.cache import Cache
 from django.core.files.base import File
@@ -52,7 +51,6 @@ def about(request):
         'version': __version__,
         'new_version': not freedombox.candidate.is_installed,
         'os_release': get_os_release(),
-        'backports_in_use': get_backports_in_use(),
     }
     return TemplateResponse(request, 'help_about.html', context)
 
@@ -134,16 +132,3 @@ def get_os_release():
                 line = line.split('=')
                 output = line[1]
     return output
-
-
-def get_backports_in_use():
-    """Return whether backports packages are installed."""
-    # Only freedombox package is set to be installed from backports currently.
-    output = subprocess.check_output(['apt-cache', 'policy', 'freedombox'])
-    for line in output.decode().split('\n'):
-        if 'Installed:' in line:
-            version = line.strip().split(': ')[1]
-            if 'bpo' in version:
-                return True
-
-    return False

plinth/modules/security/templates/security.html

@@ -7,6 +7,18 @@
 {% load i18n %}
 
 {% block status %}
+  {% if backports_in_use %}
+    <h3>{% trans "Security Notice" %}</h3>
+    <p>
+      {% blocktrans trimmed %}
+        You are using packages from Debian backports. Please note that these
+        packages do not have security support from Debian. However, they are
+        maintained on a best-effort basis by contributors in Debian and
+        FreedomBox community.
+      {% endblocktrans %}
+    </p>
+  {% endif %}
+
   <a class="btn btn-default" role="button" href="{% url 'security:report' %}"
      title="{% trans 'Show security report' %}">
     <span class="fa fa-line-chart" aria-hidden="true"></span>

plinth/modules/security/views.py

@@ -9,6 +9,7 @@ from django.utils.translation import ugettext as _
 
 from plinth import action_utils, actions
 from plinth.modules import security
+from plinth.modules.upgrades import get_backports_in_use
 
 from .forms import SecurityForm
 
@@ -28,10 +29,12 @@ def index(request):
     else:
         form = SecurityForm(initial=status, prefix='security')
 
-    return TemplateResponse(request, 'security.html', {
+    return TemplateResponse(
-        'app_info': security.app.info,
+        request, 'security.html', {
-        'form': form,
+            'app_info': security.app.info,
-    })
+            'form': form,
+            'backports_in_use': get_backports_in_use(),
+        })
 
 
 def get_status(request):

plinth/modules/upgrades/__init__.py

@@ -3,6 +3,8 @@
 FreedomBox app for upgrades.
 """
 
+import subprocess
+
 from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ugettext_noop
 
@@ -131,3 +133,16 @@ def disable():
 def _setup_repositories(data):
     """Setup apt backport repositories."""
     actions.superuser_run('upgrades', ['setup-repositories'])
+
+
+def get_backports_in_use():
+    """Return whether backports packages are installed."""
+    # Only freedombox package is set to be installed from backports currently.
+    output = subprocess.check_output(['apt-cache', 'policy', 'freedombox'])
+    for line in output.decode().split('\n'):
+        if 'Installed:' in line:
+            version = line.strip().split(': ')[1]
+            if 'bpo' in version:
+                return True
+
+    return False