Add a ApiV2RootView for /api/v2 (#1997)

galaxy/api/v2/urls.py

@@ -15,12 +15,13 @@
 # You should have received a copy of the Apache License
 # along with Galaxy.  If not, see <http://www.apache.org/licenses/>.
 
-from django.urls import path
+from django.urls import path, re_path as url
 
 from galaxy.api.v2 import views
 
 app_name = 'api'
 urlpatterns = [
+    url(r'^$', views.ApiV2RootView.as_view(), name='api_v2_root_view'),
     # Collection Imports URLs
     path('collection-imports/<int:pk>/',
          views.CollectionImportView.as_view(),

galaxy/api/v2/views/__init__.py

@@ -28,7 +28,11 @@
     VersionDetailView,
 )
 
+from .api import (  # noqa: F401
+    ApiV2RootView,
+)
 __all__ = (
+    'ApiV2RootView',
     'CollectionListView',
     'CollectionDetailView',
     'CollectionImportView',

galaxy/api/v2/views/api.py

@@ -0,0 +1,36 @@
+# (c) 2012-2019, Ansible by Red Hat
+#
+# This file is part of Ansible Galaxy
+#
+# Ansible Galaxy is free software: you can redistribute it and/or modify
+# it under the terms of the Apache License as published by
+# the Apache Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# Ansible Galaxy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# Apache License for more details.
+#
+# You should have received a copy of the Apache License
+# along with Galaxy.  If not, see <http://www.apache.org/licenses/>.
+
+from collections import OrderedDict
+
+from django.urls import reverse
+
+from rest_framework.permissions import AllowAny
+from rest_framework.response import Response
+from galaxy.api.views import base_views
+
+
+class ApiV2RootView(base_views.APIView):
+    permission_classes = (AllowAny,)
+    view_name = 'Version 2'
+
+    def get(self, request, format=None):
+        # list top level resources
+        data = OrderedDict()
+        data['collections'] = reverse('api:v2:collection-list')
+
+        return Response(data)

galaxy/api/views/views.py

@@ -121,7 +121,7 @@ def get(self, request, format=None):
             current_version='v1',
             available_versions=dict(
                 v1=current,
-                v2='/api/v2',
+                v2=reverse('api:v2:api_v2_root_view'),
             ),
             server_version=version.get_package_version('galaxy'),
             version_name=version.get_version_name(),