mirror of
https://github.com/flutter/flutter
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236 lines
8.3 KiB
Dart
236 lines
8.3 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:async';
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import 'dart:core' hide print;
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import 'dart:io' as system show exit;
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import 'dart:io' hide exit;
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import 'dart:math' as math;
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import 'package:meta/meta.dart';
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const Duration _quietTimeout = Duration(minutes: 10); // how long the output should be hidden between calls to printProgress before just being verbose
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final bool hasColor = stdout.supportsAnsiEscapes;
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final String bold = hasColor ? '\x1B[1m' : ''; // shard titles
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final String red = hasColor ? '\x1B[31m' : ''; // errors
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final String green = hasColor ? '\x1B[32m' : ''; // section titles, commands
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final String yellow = hasColor ? '\x1B[33m' : ''; // indications that a test was skipped (usually renders orange or brown)
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final String cyan = hasColor ? '\x1B[36m' : ''; // paths
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final String reverse = hasColor ? '\x1B[7m' : ''; // clocks
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final String gray = hasColor ? '\x1B[30m' : ''; // subtle decorative items (usually renders as dark gray)
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final String white = hasColor ? '\x1B[37m' : ''; // last log line (usually renders as light gray)
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final String reset = hasColor ? '\x1B[0m' : '';
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const int kESC = 0x1B;
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const int kOpenSquareBracket = 0x5B;
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const int kCSIParameterRangeStart = 0x30;
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const int kCSIParameterRangeEnd = 0x3F;
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const int kCSIIntermediateRangeStart = 0x20;
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const int kCSIIntermediateRangeEnd = 0x2F;
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const int kCSIFinalRangeStart = 0x40;
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const int kCSIFinalRangeEnd = 0x7E;
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String get redLine {
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if (hasColor) {
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return '$red${'━' * stdout.terminalColumns}$reset';
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}
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return '━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━';
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}
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String get clock {
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final DateTime now = DateTime.now();
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return '$reverse▌'
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'${now.hour.toString().padLeft(2, "0")}:'
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'${now.minute.toString().padLeft(2, "0")}:'
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'${now.second.toString().padLeft(2, "0")}'
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'▐$reset';
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}
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String prettyPrintDuration(Duration duration) {
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String result = '';
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final int minutes = duration.inMinutes;
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if (minutes > 0) {
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result += '${minutes}min ';
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}
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final int seconds = duration.inSeconds - minutes * 60;
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final int milliseconds = duration.inMilliseconds - (seconds * 1000 + minutes * 60 * 1000);
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result += '$seconds.${milliseconds.toString().padLeft(3, "0")}s';
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return result;
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}
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typedef PrintCallback = void Function(Object? line);
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typedef VoidCallback = void Function();
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// Allow print() to be overridden, for tests.
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//
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// Files that import this library should not import `print` from dart:core
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// and should not use dart:io's `stdout` or `stderr`.
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//
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// By default this hides log lines between `printProgress` calls unless a
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// timeout expires or anything calls `foundError`.
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//
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// Also used to implement `--verbose` in test.dart.
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PrintCallback print = _printQuietly;
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// Called by foundError and used to implement `--abort-on-error` in test.dart.
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VoidCallback? onError;
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bool get hasError => _hasError;
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bool _hasError = false;
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Iterable<String> get errorMessages => _errorMessages;
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List<String> _errorMessages = <String>[];
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final List<String> _pendingLogs = <String>[];
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Timer? _hideTimer; // When this is null, the output is verbose.
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void foundError(List<String> messages) {
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assert(messages.isNotEmpty);
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// Make the error message easy to notice in the logs by
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// wrapping it in a red box.
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final int width = math.max(15, (hasColor ? stdout.terminalColumns : 80) - 1);
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print('$red╔═╡${bold}ERROR$reset$red╞═${"═" * (width - 9)}');
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for (final String message in messages.expand((String line) => line.split('\n'))) {
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print('$red║$reset $message');
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}
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print('$red╚${"═" * width}');
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// Normally, "print" actually prints to the log. To make the errors visible,
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// and to include useful context, print the entire log up to this point, and
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// clear it. Subsequent messages will continue to not be logged until there is
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// another error.
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_pendingLogs.forEach(_printLoudly);
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_pendingLogs.clear();
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_errorMessages.addAll(messages);
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_hasError = true;
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if (onError != null) {
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onError!();
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}
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}
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@visibleForTesting
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void resetErrorStatus() {
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_hasError = false;
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_errorMessages.clear();
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_pendingLogs.clear();
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_hideTimer?.cancel();
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_hideTimer = null;
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}
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Never reportErrorsAndExit() {
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_hideTimer?.cancel();
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_hideTimer = null;
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print(redLine);
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print('For your convenience, the error messages reported above are repeated here:');
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_errorMessages.forEach(print);
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print(redLine);
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system.exit(1);
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}
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void printProgress(String message) {
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_pendingLogs.clear();
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_hideTimer?.cancel();
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_hideTimer = null;
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print('$clock $message $reset');
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if (hasColor) {
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// This sets up a timer to switch to verbose mode when the tests take too long,
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// so that if a test hangs we can see the logs.
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// (This is only supported with a color terminal. When the terminal doesn't
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// support colors, the scripts just print everything verbosely, that way in
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// CI there's nothing hidden.)
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_hideTimer = Timer(_quietTimeout, () {
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_hideTimer = null;
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_pendingLogs.forEach(_printLoudly);
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_pendingLogs.clear();
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});
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}
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}
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final Pattern _lineBreak = RegExp(r'[\r\n]');
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void _printQuietly(Object? message) {
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// The point of this function is to avoid printing its output unless the timer
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// has gone off in which case the function assumes verbose mode is active and
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// prints everything. To show that progress is still happening though, rather
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// than showing nothing at all, it instead shows the last line of output and
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// keeps overwriting it. To do this in color mode, carefully measures the line
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// of text ignoring color codes, which is what the parser below does.
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if (_hideTimer != null) {
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_pendingLogs.add(message.toString());
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String line = '$message'.trimRight();
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final int start = line.lastIndexOf(_lineBreak) + 1;
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int index = start;
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int length = 0;
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while (index < line.length && length < stdout.terminalColumns) {
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if (line.codeUnitAt(index) == kESC) { // 0x1B
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index += 1;
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if (index < line.length && line.codeUnitAt(index) == kOpenSquareBracket) { // 0x5B, [
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// That was the start of a CSI sequence.
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index += 1;
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while (index < line.length && line.codeUnitAt(index) >= kCSIParameterRangeStart
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&& line.codeUnitAt(index) <= kCSIParameterRangeEnd) { // 0x30..0x3F
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index += 1; // ...parameter bytes...
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}
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while (index < line.length && line.codeUnitAt(index) >= kCSIIntermediateRangeStart
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&& line.codeUnitAt(index) <= kCSIIntermediateRangeEnd) { // 0x20..0x2F
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index += 1; // ...intermediate bytes...
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}
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if (index < line.length && line.codeUnitAt(index) >= kCSIFinalRangeStart
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&& line.codeUnitAt(index) <= kCSIFinalRangeEnd) { // 0x40..0x7E
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index += 1; // ...final byte.
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}
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}
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} else {
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index += 1;
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length += 1;
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}
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}
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line = line.substring(start, index);
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if (line.isNotEmpty) {
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stdout.write('\r\x1B[2K$white$line$reset');
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}
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} else {
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_printLoudly('$message');
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}
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}
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void _printLoudly(String message) {
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if (hasColor) {
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// Overwrite the last line written by _printQuietly.
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stdout.writeln('\r\x1B[2K$reset${message.trimRight()}');
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} else {
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stdout.writeln(message);
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}
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}
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// THE FOLLOWING CODE IS A VIOLATION OF OUR STYLE GUIDE
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// BECAUSE IT INTRODUCES A VERY FLAKY RACE CONDITION
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// https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#never-check-if-a-port-is-available-before-using-it-never-add-timeouts-and-other-race-conditions
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// DO NOT USE THE FOLLOWING FUNCTIONS
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// DO NOT WRITE CODE LIKE THE FOLLOWING FUNCTIONS
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// https://github.com/flutter/flutter/issues/109474
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int _portCounter = 8080;
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/// Finds the next available local port.
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Future<int> findAvailablePortAndPossiblyCauseFlakyTests() async {
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while (!await _isPortAvailable(_portCounter)) {
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_portCounter += 1;
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}
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return _portCounter++;
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}
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Future<bool> _isPortAvailable(int port) async {
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try {
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final RawSocket socket = await RawSocket.connect('localhost', port);
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socket.shutdown(SocketDirection.both);
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await socket.close();
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return false;
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} on SocketException {
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return true;
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}
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}
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