Added package gulp task.

gulpfile.js

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for details.
 
-var child_process = require('child_process');
 var gulp = require('gulp');
 var log = require('gulp-util').log;
 var sourcemaps = require('gulp-sourcemaps');
@@ -13,6 +12,7 @@ var mocha = require('gulp-mocha');
 var GulpExtras = require("./tools/gulp-extras");
 var copyright = GulpExtras.checkCopyright;
 var imports = GulpExtras.checkImports;
+var executeCommand = GulpExtras.executeCommand;
 
 var srcPath = 'src';
 var outPath = 'out';
@@ -106,3 +106,9 @@ gulp.task("clean", function () {
     });
     return del(pathsToDelete, { force: true });
 });
+
+gulp.task("package", function (callback) {
+    var command = path.join(__dirname, "node_modules", ".bin", "vsce");
+    var args = ["package"];
+    executeCommand(command, args, callback);
+});

tools/gulp-extras.js

@@ -2,6 +2,7 @@
 // Licensed under the MIT license. See LICENSE file in the project root for details.
 "use strict";
 
+var child_process = require("child_process");
 var fs = require("fs");
 var gutil = require("gulp-util");
 var path = require("path");
@@ -99,7 +100,24 @@ var checkImports = function() {
     });
 };
 
+var executeCommand = function(command, args, callback) {
+    var process = child_process.spawn(command, args);
+
+    process.stdout.on('data', function(data) {
+        console.log("" + data);
+    });
+
+    process.stderr.on('data', function(data) {
+        console.error("" + data);
+    });
+
+    process.on('exit', function(code) {
+        callback(code === 0 ? undefined : "Error code: " + code);
+    });
+};
+
 module.exports = {
     checkCopyright: checkCopyright,
-    checkImports: checkImports
+    checkImports: checkImports,
+    executeCommand: executeCommand
 }