Can't use an array of hostnames in --allowedHosts cli parameter in @angular/build:dev-server #33955

Command

serve

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

When using @angular-devkit/build-angular:dev-server I can use --allowedHosts parameter with array of hostnames, so my hostnames can be dynamic.

But when using @angular/build:dev-server the array of names is not recognized (only boolean type is passed instead?)

ng serve myproject --allowed-hosts "example.com"

"Error: Unknown argument: example.com"

Workaround:

__VITE_ADDITIONAL_SERVER_ALLOWED_HOSTS=example.com ng serve myproject

or hard code in the array format in angular.json like mentioned in angular/angular#64104

Comparing the two builder i can see this difference if you "patch" @angular/build:dev-server's schema.json, then the command will work.

https://github.com/angular/angular-cli/blob/main/packages/angular_devkit/build_angular/src/builders/dev-server/schema.json
vs
https://github.com/angular/angular-cli/blob/main/packages/angular/build/src/builders/dev-server/schema.json

    "allowedHosts": {
+     "type": "array",
      "description": "The hosts that the development server will respond to. This option sets the Vite option of the same name. For further details: https://vite.dev/config/server-options.html#server-allowedhosts",
      "default": [],
+      "items": {
+        "type": "string"
+      }
-      "oneOf": [
-        {
-          "type": "array",
-          "description": "A list of hosts that the development server will respond to.",
-          "items": {
-            "type": "string"
-          }
-        },
-        {
-          "type": "boolean",
-          "description": "Indicates that all hosts are allowed. This is not recommended and a security risk."
-        }
-      ]
    },

@see issue * PR for the devkit commit that added the option:

• Expose webpack-dev-server allowedHosts option #13656
• feat(@angular-devkit/build-angular): expose webpack-dev-server's allowedHosts option #15366

It note that @angular-devkit/build-angular:dev-server also has a (custom?) --disableHostCheck parameter which sets allowedHosts to true if passed, so then disable all hosts situation can be covered as schema no longer allows boolean, only array.

Not sure how to fix properly.

Minimal Reproduction

Exception or Error

Your Environment

-

Anything else relevant?

No response