Add config to enable "public" namespaces

These are namespaces that will be displayed in the repo list view, regardless of whether the user is a member.

config.py

@@ -273,6 +273,12 @@ class DefaultConfig(ImmutableConfig):
   # rather than only write access or admin access.
   FEATURE_READER_BUILD_LOGS = False
 
+  # If a namespace is defined in the public namespace list, then it will appear on *all*
+  # user's repository list pages, regardless of whether that user is a member of the namespace.
+  # Typically, this is used by an enterprise customer in configuring a set of "well-known"
+  # namespaces.
+  PUBLIC_NAMESPACES = []
+
   # The namespace to use for library repositories.
   # Note: This must remain 'library' until Docker removes their hard-coded namespace for libraries.
   # See: https://github.com/docker/docker/blob/master/registry/session.go#L320

endpoints/api/user.py

@@ -79,6 +79,7 @@ def user_view(user, previous_username=None):
       'name': o.username,
       'avatar': avatar.get_data_for_org(o),
       'can_create_repo': CreateRepositoryPermission(o.username).can(),
+      'public': o.username in app.config.get('PUBLIC_NAMESPACES', []),
     }
 
     if user_admin:
@@ -89,7 +90,13 @@ def user_view(user, previous_username=None):
 
     return org_response
 
-  organizations = model.organization.get_user_organizations(user.username)
+  # Retrieve the organizations for the user.
+  organizations = list(model.organization.get_user_organizations(user.username))
+
+  # Add any public namespaces.
+  public_namespaces = app.config.get('PUBLIC_NAMESPACES', [])
+  if public_namespaces:
+    organizations.extend([model.user.get_namespace_user(ns) for ns in public_namespaces])
 
   def login_view(login):
     try:

static/js/pages/repo-list.js

@@ -11,7 +11,7 @@
   }]);
 
 
-  function RepoListCtrl($scope, $sanitize, $q, Restangular, UserService, ApiService, Features) {
+  function RepoListCtrl($scope, $sanitize, $q, Restangular, UserService, ApiService, Features, Config) {
     $scope.namespace = null;
     $scope.page = 1;
     $scope.publicPageCount = null;
@@ -35,7 +35,8 @@
         user.organizations.map(function(org) {
           $scope.namespaces.push({
             'name': org.name,
-            'avatar': org.avatar
+            'avatar': org.avatar,
+            'public': org.public
           });
         });
 
@@ -99,7 +100,8 @@
         var options = {
           'namespace': namespace.name,
           'last_modified': true,
-          'popularity': true
+          'popularity': true,
+          'public': namespace.public
         };
 
         namespace.repositories = ApiService.listReposAsResource().withOptions(options).get(function(resp) {