Create wrapper script around mojom's generate.dart in the Sky package.

mojo/dart/mojom/bin/generate.dart

-// Copyright 2015 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.
-
-/*
-* This script should be invoked via 'pub run' for an application that consumes
-* pub packages containing generated Mojo bindings (.mojom.dart files).
-*
-* It should be invoked as follows after 'pub get':
-* $ pub run mojom:generate
-*/
-
-import 'dart:async';
-import 'dart:io';
-
-import 'package:args/args.dart' as args;
-import 'package:path/path.dart' as path;
-
-bool verbose;
-bool dryRun;
-
-bool isMojomDart(String path) => path.endsWith('.mojom.dart');
-
-// Copies .mojom.dart files from a particular package's mojom directory to
-// the mojom package directory.
-//
-// mojomDirectory: A pub packages mojom directory, i.e. $PACKAGE/mojom.
-// mojomPackage: The mojom package directory.
-copyMojomDirContents(Directory mojomDirectory, Directory mojomPackage) async {
-  assert(await mojomDirectory.exists());
-  await for (var mojoms in mojomDirectory.list(recursive: true)) {
-    if (mojoms is! File) continue;
-    if (!isMojomDart(mojoms.path)) continue;
-    if (verbose) print("Found $mojoms");
-
-    final relative = path.relative(mojoms.path, from: mojomDirectory.path);
-    final dest = path.join(mojomPackage.path, relative);
-    final destDirectory = new Directory(path.dirname(dest));
-
-    if (verbose || dryRun) {
-      print('Copying $mojoms to $dest');
-    }
-
-    if (!dryRun) {
-      final File source = new File(mojoms.path);
-      if (verbose) print("Ensuring $destDirectory exists");
-      await destDirectory.create(recursive: true);
-      source.copy(dest);
-    }
-  }
-}
-
-// If a package has a mojom directory, uses copyMojomDirContents to install them
-// in the mojom package.
-//
-// package: The directory of a pub package in an application's packages
-//          directory.
-// mojoPackage: The mojom package directory in an application's packages
-//              directory
-installPackageMojoms(Directory package, Directory mojomPackage) async {
-  if (package.path == mojomPackage.path) return;
-  if (verbose) print("package = $package");
-  final mojomDirectory = new Directory(path.join(package.path, 'mojom'));
-  if (verbose) print("looking for = $mojomDirectory");
-  if (await mojomDirectory.exists()) {
-    copyMojomDirContents(mojomDirectory, mojomPackage);
-  } else if (verbose) {
-    print("$mojomDirectory not found");
-  }
-}
-
-main(List<String> arguments) async {
-  final parser = new args.ArgParser()
-    ..addOption('package-root',
-        abbr: 'p',
-        defaultsTo: path.join(Directory.current.path, 'packages'),
-        help: 'An absolute path to an application\'s package root')
-    ..addOption('additional-mojom-dir',
-        abbr: 'a',
-        allowMultiple: true,
-        help: 'Absolute path to an additional directory containing mojom.dart'
-        'files to put in the mojom package. May be specified multiple times.')
-    ..addFlag('dry-run',
-        abbr: 'd',
-        defaultsTo: false,
-        help: 'Print the copy operations that would have been run, but'
-        'do not copy anything.')
-    ..addFlag('verbose', abbr: 'v', defaultsTo: false);
-  final result = parser.parse(arguments);
-  verbose = result['verbose'];
-  dryRun = result['dry-run'];
-
-  final packages = new Directory(result['package-root']);
-  if (!packages.isAbsolute) {
-    print("The --package-root parameter should be an absolute path.");
-    exit(1);
-  }
-  if (verbose) print("packages = $packages");
-  if (!(await packages.exists())) {
-    print("The packages directory $packages does not exist");
-    exit(1);
-  }
-
-  var additional_mojom_dirs = [];
-  for (var mojom_dir_path in result['additional-mojom-dir']) {
-    final mojom_dir = new Directory(mojom_dir_path);
-    if (!mojom_dir.isAbsolute) {
-      print("All --additional-mojom-dir parameters should be absolute paths.");
-      exit(1);
-    }
-    if (!(await mojom_dir.exists())) {
-      print("The additional mojom directory $mojom_dir does not exist");
-      exit(1);
-    }
-    additional_mojom_dirs.add(mojom_dir);
-  }
-  if (verbose) print("additional_mojom_dirs = $additional_mojom_dirs");
-
-  final mojomPackage = new Directory(path.join(packages.path, 'mojom'));
-  if (verbose) print("mojom package = $mojomPackage");
-  if (!(await mojomPackage.exists())) {
-    print("The mojom package directory $mojomPackage does not exist");
-    exit(1);
-  }
-
-  await for (var package in packages.list()) {
-    if (package is Directory) {
-      installPackageMojoms(package, mojomPackage);
-    }
-  }
-
-  for (var mojom_dir in additional_mojom_dirs) {
-    copyMojomDirContents(mojom_dir, mojomPackage);
-  }
-}