flutter/packages/flutter_tools/lib/src/web/web_validator.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import '../doctor.dart';
import '../globals.dart' as globals;
import 'chrome.dart';

/// A validator that checks whether chrome is installed and can run.
class WebValidator extends DoctorValidator {
  const WebValidator() : super('Chrome - develop for the web');

  @override
  Future<ValidationResult> validate() async {
    final String chrome = findChromeExecutable();
    final bool canRunChrome = chromeLauncher.canFindChrome();
    final List<ValidationMessage> messages = <ValidationMessage>[
      if (globals.platform.environment.containsKey(kChromeEnvironment))
        if (!canRunChrome)
          ValidationMessage.hint('$chrome is not executable.')
        else
          ValidationMessage('$kChromeEnvironment = $chrome')
      else
        if (!canRunChrome)
          ValidationMessage.hint('Cannot find Chrome. Try setting '
            '$kChromeEnvironment to a Chrome executable.')
        else
          ValidationMessage('Chrome at $chrome'),
    ];
    if (!canRunChrome) {
      return ValidationResult(
        ValidationType.missing,
        messages,
        statusInfo: 'Cannot find chrome executable at $chrome',
      );
    }
    return ValidationResult(
      ValidationType.installed,
      messages,
    );
  }
}