- Add a dropdown-select directive and use it in the git trigger setup dialog both times

- Add a dropdown-select for the docker file folder
- Add an API method for listing the build source sub directories

endpoints/api.py

@@ -29,7 +29,7 @@ from auth.permissions import (ReadRepositoryPermission,
                               ViewTeamPermission,
                               UserPermission)
 from endpoints.common import common_login, get_route_data, truthy_param
-from endpoints.trigger import BuildTrigger, TriggerActivationException
+from endpoints.trigger import BuildTrigger, TriggerActivationException, EmptyRepositoryException
 from util.cache import cache_control
 from datetime import datetime, timedelta
 
@@ -1369,6 +1369,39 @@ def _prepare_webhook_url(scheme, username, password, hostname, path):
   return urlparse.urlunparse((scheme, auth_hostname, path, '', '', ''))
 
 
+@api.route('/repository/<path:repository>/trigger/<trigger_uuid>/subdir',
+           methods=['POST'])
+@api_login_required
+@parse_repository_name
+def list_build_trigger_subdirs(namespace, repository, trigger_uuid):
+  permission = AdministerRepositoryPermission(namespace, repository)
+  if permission.can():
+    try:
+      trigger = model.get_build_trigger(namespace, repository, trigger_uuid)
+    except model.InvalidBuildTriggerException:
+      abort(404)
+      return
+
+    handler = BuildTrigger.get_trigger_for_service(trigger.service.name)
+    user_permission = UserPermission(trigger.connected_user.username)
+    if user_permission.can():
+      new_config_dict = request.get_json()
+
+      try:
+        subdirs = handler.list_build_subdirs(trigger.auth_token, new_config_dict)
+        return jsonify({
+          'subdir': subdirs,
+          'status': 'success'
+        })    
+      except EmptyRepositoryException as e:
+        return jsonify({
+          'status': 'error',
+          'message': e.msg
+        })
+
+  abort(403) # Permission denied
+
+
 @api.route('/repository/<path:repository>/trigger/<trigger_uuid>/activate',
            methods=['POST'])
 @api_login_required