75 lines
2.1 KiB
Dart
75 lines
2.1 KiB
Dart
// Copyright 2015 The Chromium 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 '../device.dart';
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import '../globals.dart';
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import '../runner/flutter_command.dart';
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class LogsCommand extends FlutterCommand {
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final String name = 'logs';
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final String description = 'Show log output for running Flutter apps.';
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LogsCommand() {
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argParser.addFlag('clear',
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negatable: false,
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abbr: 'c',
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help: 'Clear log history before reading from logs.'
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);
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}
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bool get requiresProjectRoot => false;
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bool get requiresDevice => true;
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Future<int> runInProject() async {
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List<Device> devices = await deviceManager.getDevices();
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if (devices.isEmpty && deviceManager.hasSpecifiedDeviceId) {
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printError("No device found with id '${deviceManager.specifiedDeviceId}'.");
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return 1;
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} else if (devices.isEmpty) {
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printStatus('No connected devices.');
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return 0;
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}
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bool clear = argResults['clear'];
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List<DeviceLogReader> readers = new List<DeviceLogReader>();
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for (Device device in devices) {
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if (clear)
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device.clearLogs();
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readers.add(device.logReader);
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}
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printStatus('Showing ${readers.join(', ')} logs:');
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List<int> results = await Future.wait(readers.map((DeviceLogReader reader) async {
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if (!reader.isReading) {
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// Start reading.
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await reader.start();
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}
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StreamSubscription subscription = reader.lines.listen((String line) {
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if (devices.length > 1) {
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// Prefix with the name of the device.
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print('[${reader.name}] $line');
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} else {
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print(line);
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}
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});
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// Wait for the log reader to be finished.
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int result = await reader.finished;
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subscription.cancel();
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if (result != 0)
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printError('Error listening to $reader logs.');
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return result;
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}));
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// If all readers failed, return an error.
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return results.every((int result) => result != 0) ? 1 : 0;
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}
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}
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