Re-added namespace to launch file

Author: evan-palmer

message_transforms/launch/message_transforms.launch.yaml

@@ -1,10 +1,15 @@
 launch:
+  - arg:
+      name: ns
+      default: ""
+
   - arg:
       name: parameters_file
       default: ""
 
   - node:
       pkg: message_transforms
       exec: message_transforms_node
+      namespace: $(var ns)
       param:
         - from: $(var parameters_file)

message_transforms_demos/config/demo.yaml

@@ -1,7 +1,7 @@
 # Reminder: If you plan to launch multiple instances of the message_transforms
 # node, you must provide a unique namespace for each instance. The chosen
 # namespace should be reflected in the configuration file.
-message_transforms:
+/my_namespace/message_transforms:
   ros__parameters:
     # Provide a list of incoming topics to which the message transforms should
     # be applied. The messages published on the topic should be of a supported

message_transforms_demos/launch/demo.launch.yaml

@@ -15,5 +15,7 @@ launch:
   - include:
       file: $(find-pkg-share message_transforms)/launch/message_transforms.launch.yaml
       arg:
+        - name: ns
+          value: my_namespace
         - name: parameters_file
           value: $(var params_file)