dart-lang / linter / 3690449303

// Copyright (c) 2019, 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/src/lint/config.dart'; // ignore: implementation_imports

import 'package:http/http.dart' as http;

Future<List<String>> _readCoreLints() async => _fetchLints(

    'https://raw.githubusercontent.com/dart-lang/lints/main/lib/core.yaml');

/// todo(pq): de-duplicate these fetches / URIs

Future<List<String>> _readFlutterLints() async => _fetchLints(

    'https://raw.githubusercontent.com/flutter/packages/main/packages/flutter_lints/lib/flutter.yaml');

Future<List<String>> _readRecommendedLints() async => _fetchLints(

    'https://raw.githubusercontent.com/dart-lang/lints/main/lib/recommended.yaml');

/// todo(pq): update `scorecard.dart` to reuse these fetch functions.

Future<List<String>> _fetchLints(String url) async {

  var client = http.Client();

  var req = await client.get(Uri.parse(url));

  return _readLints(req.body);

}

List<String> _readLints(String contents) {

  var lintConfigs = processAnalysisOptionsFile(contents);

  if (lintConfigs == null) {

    return [];

  }

  return lintConfigs.ruleConfigs.map((c) => c.name ?? '<unknown>').toList();

}

List<String>? _coreRules;

List<String>? _recommendedRules;

List<String>? _flutterRules;

Future<List<String>> get coreRules async =>

    _coreRules ??= await _readCoreLints();

Future<List<String>> get recommendedRules async =>

    _recommendedRules ??= await _readRecommendedLints();

Future<List<String>> get flutterRules async =>

    _flutterRules ??= await _readFlutterLints();

Future<List<String>> fetchRules(Uri optionsUrl) async {

  var config = await _fetchConfig(optionsUrl);

  if (config == null) {

    print('no config found for: $optionsUrl (SKIPPED)');

    return <String>[];

  }

  var rules = <String>[];

  for (var ruleConfig in config.ruleConfigs) {

    var name = ruleConfig.name;

    if (name != null) {

      rules.add(name);

    }

  }

  return rules;

}

Future<LintConfig?> _fetchConfig(Uri url) async {

  print('loading $url...');

  var req = await http.get(url);

  return processAnalysisOptionsFile(req.body);

}