blob: cc7b13202a119fdbcf1b3cc1dc99675121a8ec40 [file] [log] [blame]
// 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.
// Rolls the dev channel.
// Only tested on Linux.
// See:
import 'dart:io';
import 'package:args/args.dart';
const String kIncrement = 'increment';
const String kX = 'x';
const String kY = 'y';
const String kZ = 'z';
const String kCommit = 'commit';
const String kOrigin = 'origin';
const String kJustPrint = 'just-print';
const String kYes = 'yes';
const String kHelp = 'help';
const String kUpstreamRemote = '';
void main(List<String> args) {
final ArgParser argParser = ArgParser(allowTrailingOptions: false);
help: 'Specifies which part of the x.y.z version number to increment. Required.',
valueHelp: 'level',
allowed: <String>[kX, kY, kZ],
allowedHelp: <String, String>{
kX: 'Indicates a major development, e.g. typically changed after a big press event.',
kY: 'Indicates a minor development, e.g. typically changed after a beta release.',
kZ: 'Indicates the least notable level of change. You normally want this.',
help: 'Specifies which git commit to roll to the dev branch.',
valueHelp: 'hash',
defaultsTo: 'upstream/master',
help: 'Specifies the name of the upstream repository',
valueHelp: 'repository',
defaultsTo: 'upstream',
negatable: false,
"Don't actually roll the dev channel; "
'just print the would-be version and quit.',
argParser.addFlag(kYes, negatable: false, abbr: 'y', help: 'Skip the confirmation prompt.');
argParser.addFlag(kHelp, negatable: false, help: 'Show this help message.', hide: true);
ArgResults argResults;
try {
argResults = argParser.parse(args);
} on ArgParserException catch (error) {
final String level = argResults[kIncrement] as String;
final String commit = argResults[kCommit] as String;
final String origin = argResults[kOrigin] as String;
final bool justPrint = argResults[kJustPrint] as bool;
final bool autoApprove = argResults[kYes] as bool;
final bool help = argResults[kHelp] as bool;
if (help || level == null) {
print('roll_dev.dart --increment=level --commit=hash • update the version tags and roll a new dev build.\n');
if (getGitOutput('remote get-url $origin', 'check whether this is a flutter checkout') != kUpstreamRemote) {
print('The current directory is not a Flutter repository checkout with a correctly configured upstream remote.');
print('For more details see:');
if (getGitOutput('status --porcelain', 'check status of your local checkout') != '') {
print('Your git repository is not clean. Try running "git clean -fd". Warning, this ');
print('will delete files! Run with -n to find out which ones.');
runGit('fetch $origin', 'fetch $origin');
runGit('reset $commit --hard', 'reset to the release commit');
String version = getFullTag();
final Match match = parseFullTag(version);
if (match == null) {
print('Could not determine the version for this build.');
if (version.isNotEmpty)
print('Git reported the latest version as "$version", which does not fit the expected pattern.');
final List<int> parts = match.groups(<int>[1, 2, 3, 4, 5]).map<int>(int.parse).toList();
if ( == '0') {
print('This commit has already been released, as version ${getVersionFromParts(parts)}.');
switch (level) {
case kX:
parts[0] += 1;
parts[1] = 0;
parts[2] = 0;
parts[3] = 0;
parts[4] = 0;
case kY:
parts[1] += 1;
parts[2] = 0;
parts[3] = 0;
parts[4] = 0;
case kZ:
parts[2] = 0;
parts[3] += 1;
parts[4] = 0;
print('Unknown increment level. The valid values are "$kX", "$kY", and "$kZ".');
version = getVersionFromParts(parts);
if (justPrint) {
final String hash = getGitOutput('rev-parse HEAD', 'Get git hash for $commit');
runGit('tag $version', 'tag the commit with the version label');
if (autoApprove) {
print('Publishing Flutter $version (${hash.substring(0, 10)}) to the "dev" channel.');
} else {
print('Your tree is ready to publish Flutter $version (${hash.substring(0, 10)}) '
'to the "dev" channel.');
stdout.write('Are you? [yes/no] ');
if (stdin.readLineSync() != 'yes') {
runGit('tag -d $version', 'remove the tag you did not want to publish');
print('The dev roll has been aborted.');
runGit('push $origin $version', 'publish the version');
runGit('push $origin HEAD:dev', 'land the new version on the "dev" branch');
print('Flutter version $version has been rolled to the "dev" channel!');
String getFullTag() {
return getGitOutput(
'describe --match *.*.*-dev.*.* --first-parent --long --tags',
'obtain last released version number',
Match parseFullTag(String version) {
final RegExp versionPattern = RegExp(r'^([0-9]+)\.([0-9]+)\.([0-9]+)-dev\.([0-9]+)\.([0-9]+)-([0-9]+)-g([a-f0-9]+)$');
return versionPattern.matchAsPrefix(version);
String getVersionFromParts(List<int> parts) {
assert(parts.length == 5);
final StringBuffer buf = StringBuffer()
return buf.toString();
String getGitOutput(String command, String explanation) {
final ProcessResult result = _runGit(command);
if ((result.stderr as String).isEmpty && result.exitCode == 0)
return (result.stdout as String).trim();
_reportGitFailureAndExit(result, explanation);
return null; // for the analyzer's sake
void runGit(String command, String explanation) {
final ProcessResult result = _runGit(command);
if (result.exitCode != 0)
_reportGitFailureAndExit(result, explanation);
ProcessResult _runGit(String command) {
return Process.runSync('git', command.split(' '));
void _reportGitFailureAndExit(ProcessResult result, String explanation) {
if (result.exitCode != 0) {
print('Failed to $explanation. Git exited with error code ${result.exitCode}.');
} else {
print('Failed to $explanation.');
if ((result.stdout as String).isNotEmpty)
print('stdout from git:\n${result.stdout}\n');
if ((result.stderr as String).isNotEmpty)
print('stderr from git:\n${result.stderr}\n');