Hybrid connections improve error/help msg (#18843)

Author: madsd

src/azure-cli/azure/cli/command_modules/appservice/_help.py

@@ -692,7 +692,7 @@
 
 helps['functionapp hybrid-connection add'] = """
 type: command
-short-summary: add a hybrid-connection to a functionapp
+short-summary: add an existing hybrid-connection to a functionapp
 examples:
   - name: add a hybrid-connection to a functionapp
     text: az functionapp hybrid-connection add -g MyResourceGroup -n MyWebapp --namespace [HybridConnectionNamespace] --hybrid-connection [HybridConnectionName] -s [slot]
@@ -1751,7 +1751,7 @@
 
 helps['webapp hybrid-connection add'] = """
 type: command
-short-summary: add a hybrid-connection to a webapp
+short-summary: add an existing hybrid-connection to a webapp
 examples:
   - name: add a hybrid-connection to a webapp
     text: az webapp hybrid-connection add -g MyResourceGroup -n MyWebapp --namespace [HybridConnectionNamespace] --hybrid-connection [HybridConnectionName] -s [slot]

src/azure-cli/azure/cli/command_modules/appservice/custom.py

@@ -3317,20 +3317,20 @@ def list_hc(cmd, name, resource_group_name, slot=None):
 
 def add_hc(cmd, name, resource_group_name, namespace, hybrid_connection, slot=None):
     HybridConnection = cmd.get_models('HybridConnection')
-    linux_webapp = show_webapp(cmd, resource_group_name, name, slot)
-    is_linux = linux_webapp.reserved
-    if is_linux:
-        return logger.warning("hybrid connections not supported on a linux app.")
 
     web_client = web_client_factory(cmd.cli_ctx)
     hy_co_client = hycos_mgmt_client_factory(cmd.cli_ctx, cmd.cli_ctx)
     namespace_client = namespaces_mgmt_client_factory(cmd.cli_ctx, cmd.cli_ctx)
 
     hy_co_id = ''
     for n in namespace_client.list():
+        logger.warning(n.name)
         if n.name == namespace:
             hy_co_id = n.id
 
+    if hy_co_id == '':
+        raise ResourceNotFoundError('Azure Service Bus Relay namespace {} was not found.'.format(namespace))
+
     i = 0
     hy_co_resource_group = ''
     hy_co_split = hy_co_id.split("/")