Implement skeleton codes for a new version of WebIDL compiler

This is a new initial implementation of WebIDL compiler. It has the
following differences compared to the existing one.
  - It is built by `gulp` instead of `gyp`
  - No longer build `generator` and `webidl` separately

ISSUE=#207

bootstrap/bacardi.sh

@@ -49,4 +49,5 @@ for command in $(ls $(bootstrap_command_path)); do
   fi
 done
 
+export NODE_PATH=$(bacardi_path)
 gulp $@

generator/index.ts

@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) 2017 The Bacardi Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as assert from 'assert';
+
+export async function run(idlFiles: string[]): Promise<number> {
+  assert(idlFiles.indexOf('test/test_interface.idl') >= 0);
+  assert(idlFiles.indexOf('examples/calculator.idl') >= 0);
+  assert(idlFiles.indexOf('examples/electron/native/electron_native.idl') >= 0);
+
+  // Not implemented yet.
+
+  return 0;
+}

gulpfile.ts

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+import * as generator from 'generator';
+import * as globs from 'globs';
 import * as gulp from 'gulp';
 import * as shell from 'gulp-shell';
 import gulpTslint from 'gulp-tslint';
@@ -29,6 +31,15 @@ gulp.task('default', () => {
   return;
 });
 
+/**
+ * Build WebIDL
+ */
+gulp.task('build_webidl', (callback) => {
+  globs(['examples/**/*.idl', 'test/**/*.idl'], async(error, files) => {
+    callback(await generator.run(files));
+  });
+});
+
 /**
  * This task will be used in binding.gyp to build native files.
  */
@@ -100,7 +111,10 @@ gulp.task('lint_native', shell.task([
 gulp.task('lint_ts', () => {
   const program: ts.Program = tslint.Linter.createProgram('tsconfig.json');
 
-  return gulp.src('gulpfile.ts')
+  return gulp.src([
+        'gulpfile.ts',
+        'generator/index.ts'
+      ])
       .pipe(gulpTslint({
           formatter: 'codeFrame',
           program: program
@@ -113,7 +127,10 @@ gulp.task('lint_ts', () => {
 gulp.task('lint_ts:fix', () => {
   const program: ts.Program = tslint.Linter.createProgram('tsconfig.json');
 
-  return gulp.src('gulpfile.ts')
+  return gulp.src([
+        'gulpfile.ts',
+        'generator/index.ts'
+      ])
       .pipe(gulpTslint({
           formatter: 'codeFrame',
           program: program,

package.json

@@ -8,6 +8,7 @@
     "change-case": "^3.0.1",
     "electron": "^1.7.8",
     "electron-rebuild": "^1.6.0",
+    "globs": "^0.1.3",
     "gulp": "^3.9.1",
     "gulp-shell": "^0.6.3",
     "gulp-tslint": "^8.1.2",