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Adds initial support for hot reload for Fuchsia to flutter_tool. (flu…
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227
packages/flutter_tools/lib/src/commands/fuchsia_reload.dart
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| // Copyright 2017 The Chromium Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
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| import 'dart:async'; | ||
| import 'dart:math'; | ||
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| import '../base/common.dart'; | ||
| import '../base/file_system.dart'; | ||
| import '../base/io.dart'; | ||
| import '../base/platform.dart'; | ||
| import '../device.dart'; | ||
| import '../flx.dart' as flx; | ||
| import '../fuchsia/fuchsia_device.dart'; | ||
| import '../globals.dart'; | ||
| import '../run_hot.dart'; | ||
| import '../runner/flutter_command.dart'; | ||
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| // Usage: | ||
| // With e.g. flutter_gallery already running, a HotRunner can be attached to it | ||
| // with: | ||
| // $ flutter fuchsia_reload -f ~/fuchsia -a 192.168.1.39 \ | ||
| // -g //lib/flutter/examples/flutter_gallery:flutter_gallery | ||
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| class FuchsiaReloadCommand extends FlutterCommand { | ||
| String _fuchsiaRoot; | ||
| String _projectRoot; | ||
| String _projectName; | ||
| String _fuchsiaProjectPath; | ||
| String _target; | ||
| String _address; | ||
| String _dotPackagesPath; | ||
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| @override | ||
| final String name = 'fuchsia_reload'; | ||
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| @override | ||
| final String description = 'Hot reload on Fuchsia.'; | ||
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| FuchsiaReloadCommand() { | ||
| addBuildModeFlags(defaultToRelease: false); | ||
| argParser.addOption('address', | ||
| abbr: 'a', | ||
| help: 'Fuchsia device network name or address.'); | ||
| argParser.addOption('build-type', | ||
| abbr: 'b', | ||
| defaultsTo: 'release-x86-64', | ||
| help: 'Fuchsia build type, e.g. release-x86-64.'); | ||
| argParser.addOption('fuchsia-root', | ||
| abbr: 'f', | ||
| defaultsTo: platform.environment['FUCHSIA_ROOT'], | ||
| help: 'Path to Fuchsia source tree.'); | ||
| argParser.addOption('gn-target', | ||
| abbr: 'g', | ||
| help: 'GN target of the application, e.g //path/to/app:app'); | ||
| argParser.addOption('target', | ||
| abbr: 't', | ||
| defaultsTo: flx.defaultMainPath, | ||
| help: 'Target app path / main entry-point file. ' | ||
| 'Relative to --gn-target path, e.g. lib/main.dart'); | ||
| } | ||
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| @override | ||
| Future<Null> runCommand() async { | ||
| _validateArguments(); | ||
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| // Find the network ports used on the device by VM service instances. | ||
| final List<int> servicePorts = await _getServicePorts(); | ||
| if (servicePorts.length == 0) { | ||
| throwToolExit("Couldn't find any running Observatory instances."); | ||
| } | ||
| for (int port in servicePorts) { | ||
| printStatus("Fuchsia service port: $port"); | ||
| } | ||
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| // TODO(zra): Check that there are running VM services on the returned | ||
| // ports, and find the Isolates that are running the target app. | ||
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| // Set up a device and hot runner and attach the hot runner to the first | ||
| // vm service we found. | ||
| final int firstPort = servicePorts[0]; | ||
| final FuchsiaDevice device = new FuchsiaDevice("$_address:$firstPort"); | ||
| final HotRunner hotRunner = new HotRunner( | ||
| device, | ||
| debuggingOptions: new DebuggingOptions.enabled(getBuildMode()), | ||
| target: _target, | ||
| projectRootPath: _fuchsiaProjectPath, | ||
| packagesFilePath: _dotPackagesPath); | ||
| final Uri observatoryUri = Uri.parse("http://$_address:$firstPort"); | ||
| await hotRunner.attach(observatoryUri); | ||
| } | ||
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| void _validateArguments() { | ||
| _fuchsiaRoot = argResults['fuchsia-root']; | ||
| if (_fuchsiaRoot == null) { | ||
| throwToolExit( | ||
| "Please give the location of the Fuchsia tree with --fuchsia-root"); | ||
| } | ||
| if (!_directoryExists(_fuchsiaRoot)) { | ||
| throwToolExit("Specified --fuchsia-root '$_fuchsiaRoot' does not exist"); | ||
| } | ||
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| _address = argResults['address']; | ||
| if (_address == null) { | ||
| throwToolExit( | ||
| "Give the address of the device running Fuchsia with --address"); | ||
| } | ||
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| final List<String> gnTarget = _extractPathAndName(argResults['gn-target']); | ||
| _projectRoot = gnTarget[0]; | ||
| _projectName = gnTarget[1]; | ||
| _fuchsiaProjectPath = "$_fuchsiaRoot/$_projectRoot"; | ||
| if (!_directoryExists(_fuchsiaProjectPath)) { | ||
| throwToolExit( | ||
| "Target does not exist in the Fuchsia tree: $_fuchsiaProjectPath"); | ||
| } | ||
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| final String relativeTarget = argResults['target']; | ||
| if (relativeTarget == null) { | ||
| throwToolExit('Give the application entry point with --target'); | ||
| } | ||
| _target = "$_fuchsiaProjectPath/$relativeTarget"; | ||
| if (!_fileExists(_target)) { | ||
| throwToolExit("Couldn't find application entry point at $_target"); | ||
| } | ||
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| final String buildType = argResults['build-type']; | ||
| if (buildType == null) { | ||
| throwToolExit("Give the build type with --build-type"); | ||
| } | ||
| final String packagesFileName = "${_projectName}_dart_package.packages"; | ||
| _dotPackagesPath = | ||
| "$_fuchsiaRoot/out/$buildType/gen/$_projectRoot/$packagesFileName"; | ||
| if (!_fileExists(_dotPackagesPath)) { | ||
| throwToolExit("Couldn't find .packages file at $_dotPackagesPath"); | ||
| } | ||
| } | ||
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| List<String> _extractPathAndName(String gnTarget) { | ||
| final String errorMessage = | ||
| "fuchsia_reload --target '$gnTarget' should have the form: " | ||
| "'//path/to/app:name'"; | ||
| // Separate strings like //path/to/target:app into [path/to/target, app] | ||
| final int lastColon = gnTarget.lastIndexOf(':'); | ||
| if (lastColon < 0) { | ||
| throwToolExit(errorMessage); | ||
| } | ||
| final String name = gnTarget.substring(lastColon + 1); | ||
| // Skip '//' and chop off after : | ||
| if ((gnTarget.length < 3) || (gnTarget[0] != '/') || (gnTarget[1] != '/')) { | ||
| throwToolExit(errorMessage); | ||
| } | ||
| final String path = gnTarget.substring(2, lastColon); | ||
| return <String>[path, name]; | ||
| } | ||
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| Future<List<int>> _getServicePorts() async { | ||
| final FuchsiaDeviceCommandRunner runner = | ||
| new FuchsiaDeviceCommandRunner(_fuchsiaRoot); | ||
| final List<String> lsOutput = await runner.run("ls /tmp/dart.services"); | ||
| final List<int> ports = new List<int>(); | ||
| for (String s in lsOutput) { | ||
| final String trimmed = s.trim(); | ||
| final int lastSpace = trimmed.lastIndexOf(' '); | ||
| final String lastWord = trimmed.substring(lastSpace + 1); | ||
| if ((lastWord != '.') && (lastWord != '..')) { | ||
| final int value = int.parse(lastWord, onError: (_) => null); | ||
| if (value != null) { | ||
| ports.add(value); | ||
| } | ||
| } | ||
| } | ||
| return ports; | ||
| } | ||
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| bool _directoryExists(String path) { | ||
| final Directory d = fs.directory(path); | ||
| return d.existsSync(); | ||
| } | ||
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| bool _fileExists(String path) { | ||
| final File f = fs.file(path); | ||
| return f.existsSync(); | ||
| } | ||
| } | ||
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| // TODO(zra): When Fuchsia has ssh, this should be changed to use that instead. | ||
| class FuchsiaDeviceCommandRunner { | ||
| final String _fuchsiaRoot; | ||
| final Random _rng = new Random(new DateTime.now().millisecondsSinceEpoch); | ||
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| FuchsiaDeviceCommandRunner(this._fuchsiaRoot); | ||
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| Future<List<String>> run(String command) async { | ||
| final int tag = _rng.nextInt(999999); | ||
| const String kNetRunCommand = "out/build-magenta/tools/netruncmd"; | ||
| final String netruncmd = fs.path.join(_fuchsiaRoot, kNetRunCommand); | ||
| const String kNetCP = "out/build-magenta/tools/netcp"; | ||
| final String netcp = fs.path.join(_fuchsiaRoot, kNetCP); | ||
| final String remoteStdout = "/tmp/netruncmd.$tag"; | ||
| final String localStdout = "${fs.systemTempDirectory.path}/netruncmd.$tag"; | ||
| final String redirectedCommand = "$command > $remoteStdout"; | ||
| // Run the command with output directed to a tmp file. | ||
| ProcessResult result = | ||
| await Process.run(netruncmd, <String>[":", redirectedCommand]); | ||
| if (result.exitCode != 0) { | ||
| return null; | ||
| } | ||
| // Copy that file to the local filesystem. | ||
| result = await Process.run(netcp, <String>[":$remoteStdout", localStdout]); | ||
| // Try to delete the remote file. Don't care about the result; | ||
| Process.run(netruncmd, <String>[":", "rm $remoteStdout"]); | ||
| if (result.exitCode != 0) { | ||
| return null; | ||
| } | ||
| // Read the local file. | ||
| final File f = fs.file(localStdout); | ||
| List<String> lines; | ||
| try { | ||
| lines = await f.readAsLines(); | ||
| } finally { | ||
| f.delete(); | ||
| } | ||
| return lines; | ||
| } | ||
| } |
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