update build script to persist manifest changes made by the developme…

…nt client (e.g., change user-agent)

app/nw/scripts/build-app.mjs

@@ -2,34 +2,36 @@ import path from 'path';
 import fs from 'fs-extra';
 import { purge, run } from './tools.mjs';
 
+const dirBuild = path.resolve('build');
 const pkgFile = 'package.json';
 const pkgConfig = await fs.readJSON(pkgFile);
-const dirBuild = path.resolve('build');
-
-async function createApplicationManifest() {
-    const manifest = {
-        name: pkgConfig.name,
-        //type: 'commonjs',
-        main: pkgConfig.main,
-        //'node-main': pkgConfig.main,
-        url: pkgConfig.url,
-        'node-remote': [
-            'http://localhost/*',
-            'https://haruneko.pages.dev/*'
-        ],
-        /*
-        webkit: {
-            plugin: true,
-            'page-cache': false
-        },
-        */
-        'user-agent': null,
-        dependencies: pkgConfig.dependencies
-    };
-    const file = path.resolve(dirBuild, pkgFile);
-    await fs.writeJSON(file, manifest, { spaces: 4 });
-}
+const targetFile = path.resolve(dirBuild, pkgFile);
+let targetConfig = {};
+try {
+    targetConfig = await fs.readJSON(targetFile);
+} catch { /* IGNORE */ }
 
 await purge(dirBuild);
-await createApplicationManifest();
+
+const manifest = {
+    name: pkgConfig.name,
+    //type: 'commonjs',
+    main: pkgConfig.main,
+    //'node-main': pkgConfig.main,
+    url: pkgConfig.url,
+    'node-remote': [
+        'http://localhost/*',
+        'https://haruneko.pages.dev/*'
+    ],
+    /*
+    webkit: {
+        plugin: true,
+        'page-cache': false
+    },
+    */
+    'user-agent': targetConfig['user-agent'] || null,
+    dependencies: pkgConfig.dependencies
+};
+
+await fs.writeJSON(targetFile, manifest, { spaces: 4 });
 await run('npm install --only=production', dirBuild);