Enforce uniqueness of vendor and product id pair

scripts/build-names.ts

@@ -9,6 +9,7 @@ import {getDefinitionsPath, getOutputPath} from './get-path';
 export async function buildNames() {
   try {
     const paths = glob.sync(getDefinitionsPath(), {absolute: true});
+    let foundDuplicateId = false;
     console.log(path.resolve('./'));
 
     const [v2Definitions] = [paths].map((paths) =>
@@ -20,18 +21,25 @@ export async function buildNames() {
         .map(keyboardDefinitionV2ToVIADefinitionV2)
         .reduce((p, n) => {
           if (n.vendorProductId in p) {
+            const isIdentical =
+              JSON.stringify(p[n.vendorProductId]) === JSON.stringify(n);
             console.log(
               `Duplicate id found: ${n.name} collides with ${
                 p[n.vendorProductId].name
-              }`
+              } and is${!isIdentical ? ' not' : ''} identical`
             );
+            foundDuplicateId = true;
           }
           return {...p, [n.vendorProductId]: n};
         }, {} as any)
     )
       .map((d: any) => d.name)
       .sort();
 
+    if (foundDuplicateId) {
+      throw new Error('Found duplicate vendor & product id pair');
+    }
+
     const outputPath = getOutputPath();
     if (!fs.existsSync(outputPath)) {
       fs.mkdirSync(outputPath);