mirror of
https://github.com/flutter/flutter
synced 2024-08-24 18:36:03 +00:00
131 lines
3.5 KiB
Dart
131 lines
3.5 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 'dart:io';
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void _validate(List<String> args) {
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bool errors = false;
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if (!File('bin/internal/engine.version').existsSync()) {
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errors = true;
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print('This program must be run from the root of your flutter repository.');
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}
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if (!File('../engine/src/flutter/DEPS').existsSync()) {
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errors = true;
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print('This program assumes the engine directory is a sibling to the flutter repository directory.');
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}
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if (args.length != 1) {
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errors = true;
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print('This program takes the engine revision as a single argument.');
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}
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if (errors) {
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exit(-1);
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}
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}
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const String engineRepo = '../engine/src/flutter';
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Future<void> main(List<String> args) async {
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_validate(args);
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await _fetchUpstream();
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await _fetchUpstream(engineRepo);
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String? flutterRevision;
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await for (final FlutterEngineRevision revision in _logEngineVersions()) {
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if (!await containsRevision(args[0], revision.engineRevision)) {
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if (flutterRevision == null) {
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print('Revision not found.');
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exit(-1);
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}
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print('earliest revision: $flutterRevision');
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print('Tags that contain this engine revision:');
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print(await _tagsForRevision(flutterRevision));
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exit(0);
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}
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flutterRevision = revision.flutterRevision;
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}
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}
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Future<void> _fetchUpstream([String workingDirectory = '.']) async {
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print('Fetching remotes for "$workingDirectory" - you may be prompted for SSH credentials by git.');
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final ProcessResult fetchResult = await Process.run(
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'git',
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<String>[
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'fetch',
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'--all',
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],
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workingDirectory: workingDirectory,
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);
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if (fetchResult.exitCode != 0) {
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throw Exception('Failed to fetch upstream in repository $workingDirectory');
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}
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}
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Future<String> _tagsForRevision(String flutterRevision) async {
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final ProcessResult tagResult = await Process.run(
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'git',
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<String>[
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'tag',
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'--contains',
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flutterRevision,
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],
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);
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return tagResult.stdout as String;
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}
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Future<bool> containsRevision(String ancestorRevision, String revision) async {
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final ProcessResult result = await Process.run(
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'git',
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<String>[
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'merge-base',
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'--is-ancestor',
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ancestorRevision,
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revision,
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],
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workingDirectory: engineRepo,
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);
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return result.exitCode == 0;
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}
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Stream<FlutterEngineRevision> _logEngineVersions() async* {
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final ProcessResult result = await Process.run(
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'git',
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<String>[
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'log',
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'--oneline',
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'-p',
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'--',
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'bin/internal/engine.version',
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],
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);
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if (result.exitCode != 0) {
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print(result.stderr);
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throw Exception('Failed to log bin/internal/engine.version');
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}
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final List<String> lines = (result.stdout as String).split('\n');
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int index = 0;
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while (index < lines.length - 1) {
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final String flutterRevision = lines[index].split(' ').first;
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index += 1;
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while (!lines[index].startsWith('+') || lines[index].startsWith('+++')) {
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index += 1;
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}
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if (index >= lines.length) {
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break;
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}
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final String engineRevision = lines[index].substring(1);
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yield FlutterEngineRevision(flutterRevision, engineRevision);
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index += lines[index + 1].startsWith(r'\ ') ? 2 : 1;
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}
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}
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class FlutterEngineRevision {
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const FlutterEngineRevision(this.flutterRevision, this.engineRevision);
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final String flutterRevision;
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final String engineRevision;
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@override
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String toString() => '$flutterRevision: $engineRevision';
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}
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