// Copyright (c) 2018, 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 'package:analyzer/dart/analysis/context_root.dart';
import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/src/dart/analysis/context_locator.dart';

/// Determines the list of analysis contexts that can be used to analyze the
/// files and folders that should be analyzed given a list of included files and
/// folders and a list of excluded files and folders.
///
/// Clients may not extend, implement or mix-in this class.
abstract class ContextLocator {
  /// Initialize a newly created context locator. If a [resourceProvider] is
  /// supplied, it will be used to access the file system. Otherwise the default
  /// resource provider will be used.
  factory ContextLocator({ResourceProvider resourceProvider}) =
      ContextLocatorImpl;

  /// Return a list of the context roots that should be used to analyze the
  /// files that are included by the list of [includedPaths] and not excluded by
  /// the list of [excludedPaths].
  ///
  /// If an [optionsFile] is specified, then it is assumed to be the path to the
  /// `analysis_options.yaml` file that should be used in place of the ones that
  /// would be found by looking in the directories containing the context roots.
  ///
  /// If a [packagesFile] is specified, then it is assumed to be the path to the
  /// `.packages` file that should be used in place of the one that would be
  /// found by looking in the directories containing the context roots.
  List<ContextRoot> locateRoots(
      {required List<String> includedPaths,
      List<String>? excludedPaths,
      String? optionsFile,
      String? packagesFile});
}