Add message if proptypes.js not included

Author: T4rk1n

@plotly/dash-generator-test-component-typescript/base/__init__.py

@@ -16,7 +16,11 @@
     dict(
         relative_package_path='dash_generator_test_component_typescript.js',
         namespace='dash_generator_test_component_typescript'
-    )
+    ),
+    {
+        "dev_package_path": "proptypes.js",
+        "namespace": 'dash_generator_test_component_typescript'
+    }
 ]
 
 for _component in __all__:

dash/development/_generate_prop_types.py

@@ -3,8 +3,26 @@
 # for them to be able to report invalid prop
 
 import os
+import re
 
 
+init_check_re = re.compile("proptypes.js")
+
+missing_init_msg = """
+{warning_box}
+{title}
+{warning_box}
+
+Add the following to `{namespace}/__init__.py` to enable
+runtime prop types validation with tsx components:
+
+_js_dist.append(dict(
+    dev_package_path="proptypes.js",
+    namespace="{namespace}"
+))
+
+"""
+
 prop_type_file_template = """// AUTOGENERATED FILE - DO NOT EDIT
 
 var PropTypes = window.PropTypes;
@@ -86,6 +104,21 @@ def generate_prop_type(prop_info):
     return prop_types[prop_info["name"]](prop_info)
 
 
+def check_init(namespace):
+    path = os.path.join(namespace, "__init__.py")
+    if os.path.exists(path):
+        with open(path, encoding="utf-8", mode="r") as f:
+            if not init_check_re.search(f.read()):
+                title = f"! Missing proptypes.js in `{namespace}/__init__.py` !"
+                print(
+                    missing_init_msg.format(
+                        namespace=namespace,
+                        warning_box="!" * len(title),
+                        title=title,
+                    )
+                )
+
+
 def generate_prop_types(
     metadata,
     package_name,
@@ -121,3 +154,5 @@ def generate_prop_types(
                     components_prop_types="\n\n".join(patched)
                 )
             )
+
+        check_init(package_name)

dash/development/_r_components_generation.py

@@ -278,7 +278,9 @@ def generate_js_metadata(pkg_data, project_shortname):
     if len(alldist) > 1:
         for dep in range(len(alldist)):
             curr_dep = alldist[dep]
-            rpp = curr_dep["relative_package_path"]
+            rpp = curr_dep.get("relative_package_path", "")
+            if not rpp:
+                continue
 
             async_or_dynamic = get_async_type(curr_dep)