feature(build): Include ts2dart transpile step in the Angular build.

This only transpiles one package to start with: di/ It ensures that package transpiles without errors, so no one can introduce non-TypeScript syntax. Next step is to widen the task inputs to cover additional packages. See design doc for the migration: https://docs.google.com/document/d/14RJLhu6uuv7NchFkAb6PKzOOO0L7l3Z507eKWzkEUhQ/edit A convenience task 'ts2dart' is added for developing ts2dart, and it runs all of the angular code through the transpiler to collect errors.

Author: alexeagle

gulpfile.js

@@ -25,6 +25,7 @@ var minimist = require('minimist');
 var es5build = require('./tools/build/es5build');
 var runServerDartTests = require('./tools/build/run_server_dart_tests');
 var transformCJSTests = require('./tools/build/transformCJSTests');
+var ts2dart = require('gulp-ts2dart');
 var util = require('./tools/build/util');
 
 // Note: when DART_SDK is not found, all gulp tasks ending with `.dart` will be skipped.
@@ -117,7 +118,9 @@ var CONFIG = {
  transpile: {
  src: {
  js: ['modules/**/*.js', 'modules/**/*.es6'],
- dart: ['modules/**/*.js']
+ dart: ['modules/**/*.js'],
+ // Migrating to TypeScript, one package at a time. See http://goo.gl/RzzVxn
+ ts2dart: ['modules/angular2/src/di/*.js', 'modules/angular2/test/di/*.js', 'modules/angular2/src/test_lib/*.js']
  },
  options: {
  js: {
@@ -347,6 +350,27 @@ gulp.task('build/transpile.dart', transpile(gulp, gulpPlugins, {
  srcFolderInsertion: CONFIG.srcFolderInsertion.dart
 }));
 
+gulp.task('build/transpile.dart.ts2dart', function() {
+ return gulp.src(CONFIG.transpile.src.ts2dart)
+ .pipe(ts2dart.transpile())
+ .pipe(gulp.dest('dist/dart.ts2dart'))
+});
+gulp.task('build/format.dart.ts2dart', rundartpackage(gulp, gulpPlugins, {
+ pub: DART_SDK.PUB,
+ packageName: CONFIG.formatDart.packageName,
+ args: ['dart_style:format', '-w', 'dist/dart.ts2dart']
+}));
+
+// Temporary tasks for development on ts2dart. Will likely fail.
+gulp.task('build/transpile.dart.ts2dart.all', function() {
+ return gulp.src(CONFIG.transpile.src.dart)
+ .pipe(ts2dart.transpile())
+ .pipe(gulp.dest('dist/dart.ts2dart'));
+});
+gulp.task('ts2dart', function(done) {
+ runSequence('build/transpile.dart.ts2dart.all', 'build/format.dart.ts2dart', done);
+});
+
 // ------------
 // html
 
@@ -690,9 +714,9 @@ gulp.task('tests/transform.dart', function() {
 // Builds all Dart packages, but does not compile them
 gulp.task('build/packages.dart', function(done) {
  runSequence(
- ['build/transpile.dart', 'build/html.dart', 'build/copy.dart', 'build/multicopy.dart'],
+ ['build/transpile.dart.ts2dart', 'build/transpile.dart', 'build/html.dart', 'build/copy.dart', 'build/multicopy.dart'],
  'tests/transform.dart',
- 'build/format.dart',
+ ['build/format.dart.ts2dart', 'build/format.dart'],
  'build/pubspec.dart',
  done
  );

package.json

@@ -54,6 +54,7 @@
  "gulp-sourcemaps": "1.3.*",
  "gulp-template": "^3.0.0",
  "gulp-traceur": "0.16.*",
+ "gulp-ts2dart": "^1.0.0",
  "gulp-webserver": "^0.8.7",
  "js-yaml": "^3.2.7",
  "karma": "^0.12.23",