Report invalid keys separately

src/config/db-config.test.ts

@@ -598,3 +598,30 @@ test("mergeDefaultSetupAndUserConfigs - ignores, but warns about, unknown keys f
     `Unrecognised keys in Default Setup configuration: ${expectedUnrecognisedKeys}`,
   ]);
 });
+
+test("mergeDefaultSetupAndUserConfigs - warns about invalid keys from Default Setup", async (t) => {
+  const logger = new RecordingLogger();
+  const configFile: dbConfig.UserConfig = {};
+
+  const result = dbConfig.mergeDefaultSetupAndUserConfigs(
+    logger,
+    {
+      "default-setup": {
+        org: {
+          "model-packs": [123],
+        },
+      } as unknown as dbConfig.DefaultSetupConfig,
+    },
+    configFile,
+  );
+
+  t.deepEqual(result, {
+    ...configFile,
+    "default-setup": { org: { "model-packs": [123] } },
+  });
+
+  const expectedInvalidKeys = [".default-setup.org.model-packs[0]"].join(", ");
+  checkExpectedLogMessages(t, logger.messages, [
+    `Invalid keys in Default Setup configuration: ${expectedInvalidKeys}`,
+  ]);
+});

src/config/db-config.ts

@@ -112,6 +112,22 @@ export function mergeDefaultSetupAndUserConfigs(
     fromConfigInput as json.UnvalidatedObject<any>,
   );
 
+  // Report any invalid or unrecognised keys.
+  if (schemaCheckResult.invalidKeys.length > 0) {
+    logger.warning(
+      `Invalid keys in Default Setup configuration: ${schemaCheckResult.invalidKeys.join(", ")}`,
+    );
+    addNoLanguageDiagnostic(
+      undefined,
+      makeTelemetryDiagnostic(
+        "codeql-action/invalid-default-setup-config-keys",
+        "Invalid Default Setup configuration keys",
+        {
+          invalidKeys: schemaCheckResult.invalidKeys,
+        },
+      ),
+    );
+  }
   if (schemaCheckResult.unknownKeys.length > 0) {
     logger.warning(
       `Unrecognised keys in Default Setup configuration: ${schemaCheckResult.unknownKeys.join(", ")}`,
@@ -122,7 +138,6 @@ export function mergeDefaultSetupAndUserConfigs(
         "codeql-action/unrecognised-default-setup-config-keys",
         "Unrecognised Default Setup configuration keys",
         {
-          invalidKeys: schemaCheckResult.invalidKeys,
           unrecognisedKeys: schemaCheckResult.unknownKeys,
         },
       ),