remove the dep on package:uuid (#2415)

frontend_server_common/lib/src/frontend_server_client.dart

@@ -12,9 +12,9 @@ import 'package:dwds/expression_compiler.dart';
 import 'package:logging/logging.dart';
 import 'package:package_config/package_config.dart';
 import 'package:test_common/test_sdk_layout.dart';
-import 'package:uuid/uuid.dart';
 
 import 'utilities.dart';
+import 'uuid.dart';
 
 Logger _logger = Logger('FrontendServerClient');
 Logger _serverLogger = Logger('FrontendServer');
@@ -320,7 +320,7 @@ class ResidentCompiler {
     }
     var server = _server!;
 
-    var inputKey = const Uuid().v4();
+    var inputKey = generateV4UUID();
     server.stdin.writeln('recompile $mainUri$inputKey');
     _logger.info('<- recompile $mainUri$inputKey');
     for (var fileUri in request.invalidatedFiles) {
@@ -463,7 +463,7 @@ class ResidentCompiler {
     }
     var server = _server!;
 
-    var inputKey = const Uuid().v4();
+    var inputKey = generateV4UUID();
     server.stdin.writeln('compile-expression $inputKey');
     server.stdin.writeln(request.expression);
     request.definitions.forEach(server.stdin.writeln);
@@ -508,7 +508,7 @@ class ResidentCompiler {
     }
     var server = _server!;
 
-    var inputKey = const Uuid().v4();
+    var inputKey = generateV4UUID();
     server.stdin.writeln('compile-expression-to-js $inputKey');
     server.stdin.writeln(request.libraryUri);
     server.stdin.writeln(request.line);

frontend_server_common/lib/src/uuid.dart

@@ -0,0 +1,32 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:math' show Random;
+
+/// A UUID generator.
+///
+/// The generated values are 128 bit numbers encoded in a specific string
+/// format.
+///
+/// Generate a version 4 (random) uuid. This is a uuid scheme that only uses
+/// random numbers as the source of the generated uuid.
+String generateV4UUID() {
+  final special = 8 + _random.nextInt(4);
+
+  return '${_bitsDigits(16, 4)}${_bitsDigits(16, 4)}-'
+      '${_bitsDigits(16, 4)}-'
+      '4${_bitsDigits(12, 3)}-'
+      '${_printDigits(special, 1)}${_bitsDigits(12, 3)}-'
+      '${_bitsDigits(16, 4)}${_bitsDigits(16, 4)}${_bitsDigits(16, 4)}';
+}
+
+final Random _random = Random();
+
+String _bitsDigits(int bitCount, int digitCount) =>
+    _printDigits(_generateBits(bitCount), digitCount);
+
+int _generateBits(int bitCount) => _random.nextInt(1 << bitCount);
+
+String _printDigits(int value, int count) =>
+    value.toRadixString(16).padLeft(count, '0');

frontend_server_common/pubspec.yaml

@@ -17,4 +17,3 @@ dependencies:
   pub_semver: ^2.1.1
   test_common:
     path: ../test_common
-  uuid: ^3.0.7