Detect startup after recent crashes

ts/scripts/unpack-crash-reports.ts

@@ -0,0 +1,31 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import fs from 'fs/promises';
+import path from 'path';
+
+import { SignalService as Proto } from '../protobuf';
+
+async function main(fileName: string, outDir: string) {
+  await fs.mkdir(outDir, { recursive: true });
+
+  const encoded = await fs.readFile(fileName);
+  const { reports } = Proto.CrashReportList.decode(encoded);
+
+  await Promise.all(
+    reports.map(async ({ filename, content }) => {
+      if (!filename || !content) {
+        return;
+      }
+
+      const outFile = path.join(outDir, path.basename(filename));
+      console.log(`Extracting to ${outFile}`);
+      await fs.writeFile(outFile, content);
+    })
+  );
+}
+
+main(process.argv[2], process.argv[3]).catch(error => {
+  console.error(error.stack);
+  process.exit(1);
+});