Dedicated executable to build flx files for Fuchsia. (#6159)

packages/flutter_tools/bin/fuchsia_builder.dart

+// Copyright 2016 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:io';
+
+import 'package:args/args.dart';
+
+import '../lib/src/base/context.dart';
+import '../lib/src/base/logger.dart';
+import '../lib/src/flx.dart';
+import '../lib/src/globals.dart';
+
+const String _kOptionSnapshotter = 'snapshotter-path';
+const String _kOptionTarget = 'target';
+const String _kOptionPackages = 'packages';
+const String _kOptionOutput = 'output-file';
+const String _kOptionSnapshot = 'snapshot';
+const String _kOptionDepfile = 'depfile';
+const String _kOptionWorking = 'working-dir';
+const List<String> _kOptions = const <String>[
+  _kOptionSnapshotter,
+  _kOptionTarget,
+  _kOptionPackages,
+  _kOptionOutput,
+  _kOptionSnapshot,
+  _kOptionDepfile,
+  _kOptionWorking,
+];
+
+Future<Null> main(List<String> args) async {
+  context[Logger] = new StdoutLogger();
+  final ArgParser parser = new ArgParser()
+    ..addOption(_kOptionSnapshotter, help: 'The snapshotter executable')
+    ..addOption(_kOptionTarget, help: 'The entry point into the app')
+    ..addOption(_kOptionPackages, help: 'The .packages file')
+    ..addOption(_kOptionOutput, help: 'The generated flx file')
+    ..addOption(_kOptionSnapshot, help: 'The generated snapshot file')
+    ..addOption(_kOptionDepfile, help: 'The generated dependency file')
+    ..addOption(_kOptionWorking,
+        help: 'The directory where to put temporary files');
+  final ArgResults argResults = parser.parse(args);
+  if (_kOptions.any((String option) => !argResults.options.contains(option))) {
+    printError('Missing option! All options must be specified.');
+    exit(1);
+  }
+  String outputPath = argResults[_kOptionOutput];
+  final int result = await build(
+    snapshotterPath: argResults[_kOptionSnapshotter],
+    mainPath: argResults[_kOptionTarget],
+    outputPath: outputPath,
+    snapshotPath: argResults[_kOptionSnapshot],
+    depfilePath: argResults[_kOptionDepfile],
+    workingDirPath: argResults[_kOptionWorking],
+    packagesPath: argResults[_kOptionPackages],
+    includeRobotoFonts: true,
+  );
+  if (result != 0) {
+    printError('Error building $outputPath: $result.');
+  }
+  exit(result);
+}