Simplify startup and improve error handling for incomplete credentials

README.md

@@ -26,11 +26,14 @@ The top of each sample's screen says which of the two answered.
 
 ```bash
 npm install
-cds watch            # needs @sap/cds-dk (npm i -g @sap/cds-dk) - or: npm run mocked
+npm start            # cds-serve --with-mocks - or cds watch, with @sap/cds-dk installed
 ```
 
-`cds watch` prints the address of every sample. Log in as `alice` with an
-empty password (CAP's mocked development user), then open
+`--with-mocks` is what `cds watch` passes: every remote system without
+credentials is mocked. In the production profile CAP ignores the flag, so the
+same script serves a deployment. The log prints the address of every sample.
+Log in as `alice` with an empty password (CAP's mocked development user), then
+open
 <http://localhost:4004/sap/bc/z2ui5?app_start=Z2UI5_CL_CAPS_APP_001> or
 <http://localhost:4004/sap/bc/z2ui5?app_start=Z2UI5_CL_CAPS_APP_002>.
 

package.json

@@ -41,9 +41,8 @@
     "fast-xml-parser": "^5.11.1"
   },
   "scripts": {
-    "start": "cds-serve",
+    "start": "cds-serve --with-mocks",
     "watch": "cds watch",
-    "mocked": "cds-serve --with-mocks",
     "test": "node --test test/*.test.mjs",
     "lint": "eslint ."
   },

srv/apps/z2ui5_cl_caps_app_001.js

@@ -280,6 +280,7 @@ function source_of(srv) {
   if (srv.mocked) return `the mock of ${srv.name} - cds watch serves it while no credentials are configured`;
   const { url, destination } = srv.options.credentials ?? {};
   if (destination) return `destination ${destination}`;
-  const u = new URL(url);
+  let u;
+  try { u = new URL(url); } catch { return srv.name; }   // no url, or not one: the query's error says so
   return u.origin + u.pathname;
 }

srv/apps/z2ui5_cl_caps_app_002.js

@@ -356,7 +356,8 @@ function dats(value) {
 // host and client, and never user or password.
 function source_of(srv) {
   if (srv.mocked) return `the mock of ${srv.name} - cds watch serves it while no credentials are configured`;
-  const { destination, ashost, mshost, client } = srv.options.credentials ?? {};
+  const { destination, ashost, mshost, wshost, client } = srv.options.credentials ?? {};
   if (destination) return `destination ${destination}`;
-  return `${ashost ?? mshost}, client ${client}`;
+  const host = ashost ?? mshost ?? wshost;
+  return host ? `${host}, client ${client}` : srv.name;   // incomplete credentials: the call's error says so
 }