Introducing gulp.

gulpfile.js

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+/* Copyright 2016 Mozilla Foundation
+ *
+ * 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.
+ */
+/* jshint node:true */
+/* globals target */
+
+'use strict';
+
+var gulp = require('gulp');
+var gutil = require('gulp-util');
+var stream = require('stream');
+
+require('./make.js');
+
+function createStringSource(filename, content) {
+  var source = stream.Readable({ objectMode: true });
+  source._read = function () {
+    this.push(new gutil.File({
+      cwd: '',
+      base: '',
+      path: filename,
+      contents: new Buffer(content)
+    }));
+    this.push(null);
+  };
+  return source;
+}
+
+gulp.task('default', function() {
+  console.log('Available tasks:');
+  var tasks = Object.keys(gulp.tasks);
+  tasks.sort();
+  tasks.forEach(function (taskName) {
+    console.log('  ' + taskName);
+  });
+});
+
+gulp.task('server', function () {
+  console.log();
+  console.log('### Starting local server');
+
+  var WebServer = require('./test/webserver.js').WebServer;
+  var server = new WebServer();
+  server.port = 8888;
+  server.start();
+});
+
+gulp.task('makefile', function () {
+  var makefileContent = 'help:\n\tgulp\n\n';
+  var targetsNames = [];
+  for (var i in target) {
+    makefileContent += i + ':\n\tgulp ' + i + '\n\n';
+    targetsNames.push(i);
+  }
+  makefileContent += '.PHONY: ' + targetsNames.join(' ') + '\n';
+  return createStringSource('Makefile', makefileContent)
+    .pipe(gulp.dest('.'));
+});
+
+// Getting all shelljs registered tasks and register them with gulp
+var gulpContext = false;
+for (var taskName in global.target) {
+  if (taskName in gulp.tasks) {
+    continue;
+  }
+
+  var task = (function (shellJsTask) {
+    return function () {
+      gulpContext = true;
+      try {
+        shellJsTask.call(global.target);
+      } finally {
+        gulpContext = false;
+      }
+    };
+  })(global.target[taskName]);
+  gulp.task(taskName, task);
+}
+
+Object.keys(gulp.tasks).forEach(function (taskName) {
+  var oldTask = global.target[taskName] || function () {
+    gulp.run(taskName);
+  };
+
+  global.target[taskName] = function () {
+    // The require('shelljs/make') import in make.js will try to execute tasks
+    // listed in arguments, guarding with gulpContext
+    if (gulpContext) {
+      oldTask.call(global.target);
+    }
+  };
+});