Deployment of .well-known/assertLinks.json using the proper environment (#2201)

Co-authored-by: Gino Miceli <[email protected]>

Author: rfontanarosa

web/package.json

@@ -6,7 +6,9 @@
     "ci-all": "npm run ci-local-deps && npm ci",
     "ci-local-deps": "npm ci --workspace=../proto --workspace=../lib",
     "build-local-deps": "npm run build --workspace=../proto --workspace=../lib",
-    "build": "npm run --prefix scripts copy-keys && ng build -c $npm_config_config",
+    "prebuild": "npm run --prefix scripts copy-keys",
+    "build": "ng build -c $npm_config_config",
+    "postbuild": "npm run --prefix scripts copy-asset-links",
     "build-all": "npm run build-local-deps && npm run build",
     "build-and-test": "npm run build && npm run test",
     "build-all-and-test": "npm run build-all && npm run test",

web/scripts/copy-asset-links.js

@@ -0,0 +1,42 @@
+/**
+ * Copyright 2025 The Ground Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { existsSync, mkdirSync, readFileSync, writeFileSync } from 'fs';
+
+// This script copies the assetLinks.json file from `web/keys/<project-id>/` to the local
+// `dist/.well-known` folder before build. This file is used for Digital Asset Links
+// to associate the web app with the Android app.
+
+const project = process.env['npm_config_project'];
+
+const assertLinksFilepath = `../keys/${project}/assetLinks.json`;
+
+if (existsSync(assertLinksFilepath)) {
+  const assertLinks = readFileSync(
+    `../keys/${project}/assetLinks.json`,
+    'utf8'
+  );
+
+  const wellKnownDir = '../dist/.well-known';
+
+  if (!existsSync(wellKnownDir)) {
+    mkdirSync(wellKnownDir, { recursive: true });
+  }
+
+  writeFileSync(`${wellKnownDir}/assetLinks.json`, assertLinks);
+} else {
+  console.warn('Missing asserLinks.json file');
+}

web/scripts/package.json

@@ -4,7 +4,8 @@
   "description": "Ground web app custom build scripts",
   "type": "module",
   "scripts": {
-    "copy-keys": "node copy-keys.js"
+    "copy-keys": "node copy-keys.js",
+    "copy-asset-links": "node copy-asset-links.js"
   },
   "keywords": [],
   "author": "",