fix: Make flatpack-json diff friendly. (#6243)

cspell-dict.txt

@@ -19,6 +19,7 @@ elisp
 estree
 exonum
 flatpack
+Flatpacked
 gimu
 globby
 globstar
@@ -28,6 +29,7 @@ iife
 jamstack
 lcov
 licia
+linkcode
 liriliri
 megistos
 mkdir

packages/flatpack-json/package.json

@@ -52,6 +52,7 @@
     "node": ">=18"
   },
   "devDependencies": {
-    "@cspell/filetypes": "workspace:*"
+    "@cspell/filetypes": "workspace:*",
+    "diff": "^7.0.0"
   }
 }

packages/flatpack-json/scripts/flatten.mjs

@@ -0,0 +1,22 @@
+import { FlatpackStore } from '../dist/index.js';
+
+function readStdin() {
+    return new Promise((resolve, reject) => {
+        let data = '';
+        process.stdin.on('data', (chunk) => {
+            data += chunk;
+        });
+        process.stdin.on('end', () => {
+            resolve(data);
+        });
+        process.stdin.on('error', reject);
+    });
+}
+
+async function main() {
+    const content = await readStdin();
+    const store = new FlatpackStore(JSON.parse(content));
+    process.stdout.write(store.stringify());
+}
+
+main();