add user and os info to sentry.

lib/main.dart

@@ -42,9 +42,7 @@ Future main() async {
       options.tracesSampleRate = 1.0;
       options.reportPackages = false;
       Sentry.configureScope(
-        (scope) => scope.setUser(
-          SentryUser(username: Platform.environment['USER']),
-        ),
+        setSentryScope,
       );
     },
     appRunner: () => runApp(const MyApp()),
@@ -115,9 +113,7 @@ class _MyHomePageState extends State<MyHomePage> {
         }
         Sentry.captureMessage(
           'Found ${result.length} codes.',
-          withScope: (scope) {
-            SentryUser(username: Platform.environment['USER']);
-          },
+          withScope: setSentryScope,
         );
         Future.delayed(const Duration(seconds: 3), () {
           if (status == Status.notFound) {

lib/utils.dart

@@ -1,4 +1,7 @@
+import 'dart:io';
+
 import 'package:flutter/material.dart';
+import 'package:sentry_flutter/sentry_flutter.dart';
 import 'package:zbar_scan_plugin/zbar_scan_plugin.dart';
 import 'package:collection/collection.dart';
 import 'dart:math';
@@ -32,5 +35,20 @@ CenterAndSize getCenterAndSizeOfPoints(List<PointInfo> points) {
     center: center,
     size: size * 1.2,
   );
+}
 
+setSentryScope(Scope scope) {
+  var infoLines = File('/etc/os-release').readAsStringSync().split('\n').where((line) => line.contains('='));
+  Map<String, dynamic> data = {};
+  for (var info in infoLines) {
+    var parts = info.split('=');
+    data['OS_${parts.first}'] = parts.sublist(1).join('=');
+  }
+  return scope.setUser(
+    SentryUser(
+      id: File('/etc/machine-id').readAsStringSync(),
+      username: Platform.environment['USER'],
+      data: data,
+    ),
+  );
 }