1a0dc8f1e1
Originally, my aim was just to refactor (as per usual), but while messing around with the `TableBorder.symmetric` constructor, I realized that `borderRadius` was missing! This pull request makes a few class constructors more efficient, and it fixes #144277 by adding the missing parameter. <br>
50 lines
1.5 KiB
Dart
50 lines
1.5 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'base/common.dart';
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import 'base/file_system.dart';
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import 'cache.dart';
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/// A validator that runs before the tool runs any command.
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abstract class PreRunValidator {
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factory PreRunValidator({required FileSystem fileSystem}) = _DefaultPreRunValidator;
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void validate();
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}
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class _DefaultPreRunValidator implements PreRunValidator {
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_DefaultPreRunValidator({
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required this.fileSystem,
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});
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final FileSystem fileSystem;
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late final Directory _toolsDir = fileSystem.directory(
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fileSystem.path.join(Cache.flutterRoot!, 'packages', 'flutter_tools'),
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);
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@override
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void validate() {
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// If a user downloads the Flutter SDK via a pre-built archive and there is
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// an error during extraction, the user could have a valid Dart snapshot of
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// the tool but not the source directory. We still need the source, so
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// validate the source directory exists and toolExit if not.
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if (!_toolsDir.existsSync()) {
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throwToolExit(
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'Flutter SDK installation appears corrupted: expected to find the '
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'directory ${_toolsDir.path} but it does not exist! Please go to '
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'https://flutter.dev/setup for instructions on how to re-install '
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'Flutter.',
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);
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}
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}
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}
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class NoOpPreRunValidator implements PreRunValidator {
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const NoOpPreRunValidator();
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@override
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void validate() {}
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}
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