[fuchsia_reload] Use ssh instead of netcp/netruncmd (#10436)

packages/flutter_tools/lib/src/commands/fuchsia_reload.dart

@@ -4,12 +4,12 @@
 
 import 'dart:async';
 import 'dart:collection';
-import 'dart:math';
 
 import '../base/common.dart';
 import '../base/file_system.dart';
 import '../base/io.dart';
 import '../base/platform.dart';
+import '../base/process_manager.dart';
 import '../base/utils.dart';
 import '../cache.dart';
 import '../device.dart';
@@ -70,6 +70,7 @@ class FuchsiaReloadCommand extends FlutterCommand {
   final String description = 'Hot reload on Fuchsia.';
 
   String _fuchsiaRoot;
+  String _buildType;
   String _projectRoot;
   String _projectName;
   String _binaryName;
@@ -278,6 +279,10 @@ class FuchsiaReloadCommand extends FlutterCommand {
     if (_address == null)
       throwToolExit('Give the address of the device running Fuchsia with --address.');
 
+    _buildType = argResults['build-type'];
+    if (_buildType == null)
+      throwToolExit('Give the build type with --build-type.');
+
     _list = argResults['list'];
     if (_list) {
       // For --list, we only need the device address and the Fuchsia tree root.
@@ -301,11 +306,8 @@ class FuchsiaReloadCommand extends FlutterCommand {
     if (!_fileExists(_target))
       throwToolExit('Couldn\'t find application entry point at $_target.');
 
-    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/$packagesFileName';
+    _dotPackagesPath = '$_fuchsiaRoot/out/$_buildType/gen/$_projectRoot/$packagesFileName';
     if (!_fileExists(_dotPackagesPath))
       throwToolExit('Couldn\'t find .packages file at $_dotPackagesPath.');
 
@@ -341,7 +343,8 @@ class FuchsiaReloadCommand extends FlutterCommand {
   }
 
   Future<List<int>> _getServicePorts() async {
-    final FuchsiaDeviceCommandRunner runner = new FuchsiaDeviceCommandRunner(_fuchsiaRoot);
+    final FuchsiaDeviceCommandRunner runner =
+        new FuchsiaDeviceCommandRunner(_address, _fuchsiaRoot, _buildType);
     final List<String> lsOutput = await runner.run('ls /tmp/dart.services');
     final List<int> ports = <int>[];
     for (String s in lsOutput) {
@@ -369,41 +372,26 @@ class FuchsiaReloadCommand extends FlutterCommand {
 }
 
 
-// TODO(zra): When Fuchsia has ssh, this should be changed to use that instead.
 class FuchsiaDeviceCommandRunner {
+  // TODO(zra): Get rid of _address and instead use
+  // $_fuchsiaRoot/out/build-magenta/tools/netaddr --fuchsia
+  final String _address;
+  final String _buildType;
   final String _fuchsiaRoot;
-  final Random _rng = new Random(new DateTime.now().millisecondsSinceEpoch);
 
-  FuchsiaDeviceCommandRunner(this._fuchsiaRoot);
+  FuchsiaDeviceCommandRunner(this._address, this._fuchsiaRoot, this._buildType);
 
   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 > $remoteStdout';
-    // Run the command with output directed to a tmp file.
-    ProcessResult result =
-        await Process.run(netruncmd, <String>[':', redirectedCommand]);
-    if (result.exitCode != 0)
+    final String config = '$_fuchsiaRoot/out/$_buildType/ssh-keys/ssh_config';
+    final List<String> args = <String>['-F', config, _address, command];
+    printTrace('ssh ${args.join(' ')}');
+    final ProcessResult result =
+        await processManager.run(<String>['ssh', '-F', config, _address, command]);
+    if (result.exitCode != 0) {
+      printStatus("Command failed: $command\nstdout: ${result.stdout}\nstderr: ${result.stderr}");
       return null;
-    // Copy that file to the local filesystem.
-    result = await Process.run(netcp, <String>[':$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;
+    printTrace(result.stdout);
+    return result.stdout.split('\n');
   }
 }

packages/flutter_tools/test/commands/fuchsia_reload_test.dart

+// 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.
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:flutter_tools/src/commands/fuchsia_reload.dart';
+import 'package:mockito/mockito.dart';
+import 'package:process/process.dart';
+import 'package:test/test.dart';
+
+import '../src/context.dart';
+
+void main() {
+  group('FuchsiaDeviceCommandRunner', () {
+    testUsingContext('a test', () async {
+      final FuchsiaDeviceCommandRunner commandRunner =
+          new FuchsiaDeviceCommandRunner('8.8.9.9',
+                                         '~/fuchsia',
+                                         'release-x86-64');
+      final List<String> ports = await commandRunner.run('ls /tmp');
+      expect(ports, hasLength(3));
+      expect(ports[0], equals('1234'));
+      expect(ports[1], equals('5678'));
+      expect(ports[2], equals('5'));
+    }, overrides: <Type, Generator>{
+      ProcessManager: () => new MockProcessManager(),
+    });
+  });
+}
+
+class MockProcessManager extends Mock implements ProcessManager {
+  @override
+  Future<ProcessResult> run(
+    List<dynamic> command, {
+    String workingDirectory,
+    Map<String, String> environment,
+    bool includeParentEnvironment: true,
+    bool runInShell: false,
+    Encoding stdoutEncoding: SYSTEM_ENCODING,
+    Encoding stderrEncoding: SYSTEM_ENCODING,
+  }) async {
+    return new ProcessResult(0, 0, '1234\n5678\n5', '');
+  }
+}