Make sure panel_custom won't crash on invalid data (#32835)

* Make sure panel_custom won't crash on invalid data

* Add a test

homeassistant/components/hassio/manifest.json

@@ -3,6 +3,7 @@
   "name": "Hass.io",
   "documentation": "https://www.home-assistant.io/hassio",
   "requirements": [],
-  "dependencies": ["http", "panel_custom"],
+  "dependencies": ["http"],
+  "after_dependencies": ["panel_custom"],
   "codeowners": ["@home-assistant/hass-io"]
 }

homeassistant/components/panel_custom/__init__.py

@@ -146,8 +146,6 @@ async def async_setup(hass, config):
     if DOMAIN not in config:
         return True
 
-    success = False
-
     for panel in config[DOMAIN]:
         name = panel[CONF_COMPONENT_NAME]
 
@@ -182,8 +180,13 @@ async def async_setup(hass, config):
             hass.http.register_static_path(url, panel_path)
             kwargs["html_url"] = url
 
-        await async_register_panel(hass, **kwargs)
+        try:
+            await async_register_panel(hass, **kwargs)
+        except ValueError as err:
+            _LOGGER.error(
+                "Unable to register panel %s: %s",
+                panel.get(CONF_SIDEBAR_TITLE, name),
+                err,
+            )
 
-        success = True
-
-    return success
+    return True

tests/components/panel_custom/test_init.py

@@ -181,3 +181,17 @@ async def test_url_option_conflict(hass):
     for config in to_try:
         result = await setup.async_setup_component(hass, "panel_custom", config)
         assert not result
+
+
+async def test_url_path_conflict(hass):
+    """Test config with overlapping url path."""
+    assert await setup.async_setup_component(
+        hass,
+        "panel_custom",
+        {
+            "panel_custom": [
+                {"name": "todo-mvc", "js_url": "/local/bla.js"},
+                {"name": "todo-mvc", "js_url": "/local/bla.js"},
+            ]
+        },
+    )