build: update gulp, replace deprecated util package

Author: damyanpetev

build/createFiddleFiles.js

@@ -1,8 +1,7 @@
 var path = require("path"),
 	cheerio = require("cheerio"),
 	through = require("through2"),
-	gutil = require("gulp-util"),
-	File = gutil.File;
+	File = require('vinyl');
 /**
  * Extracts HTML, JS and optionally CSS into separate files in a fiddle folder
  * and generates an embed json config file
@@ -120,7 +119,7 @@ module.exports = function(options) {
 		htmlFile = new File({
 			base: file.base,
 			path: path.join(basePath, "fiddle", "demo.html"),
-			contents: new Buffer(html.join("\r\n"))
+			contents: Buffer.from(html.join("\r\n"))
 		});
 
 		// js
@@ -140,7 +139,7 @@ module.exports = function(options) {
 		jsFile = new File({
 			base: file.base,
 			path: path.join(basePath, "fiddle", "demo.js"),
-			contents: new Buffer(js)
+			contents: Buffer.from(js)
 		});
 
 		// css
@@ -151,7 +150,7 @@ module.exports = function(options) {
 			cssFile = new File({
 				base: file.base,
 				path: path.join(basePath, "fiddle", "demo.css"),
-				contents: new Buffer(unindentTrim(css))
+				contents: Buffer.from(unindentTrim(css))
 			});
 			stream.push(cssFile);
 			embed.embed.splice(2, 0, {
@@ -168,7 +167,7 @@ module.exports = function(options) {
 		stream.push(new File({
 			base: file.base,
 			path: path.join(basePath, ".gh-embed.json"),
-			contents: new Buffer(JSON.stringify(embed, null, 4))
+			contents: Buffer.from(JSON.stringify(embed, null, 4))
 		}));
 
 		stream.push(file);

build/localizeFiles.js

@@ -1,7 +1,6 @@
 var path = require("path"),
 	through = require("through2"),
-	gutil = require("gulp-util"),
-	File = gutil.File;
+	File = require('vinyl');
 
 /**
  * Localize contents of file (resources, localization strings) and push both versions back to stream
@@ -36,14 +35,14 @@ module.exports = function(options) {
 		file.originalPath = file.history[0];
 		// change out path, HTMLSamples must remain in path to keep relative correct for dest
 		file.path = path.join(basePath.replace("HTMLSamples", "HTMLSamples" + path.sep + "EN"), fileName, "index.html");
-		file.contents = new Buffer(contentsEN, encoding);
+		file.contents = Buffer.from(contentsEN, encoding);
 		file.lang = "en";
 
 		// replace JA
 		jaFile = new File({
 			base: file.base,
 			path: path.join(basePath.replace("HTMLSamples", "HTMLSamples" + path.sep + "JA"), fileName, "index.html"),
-			contents: new Buffer(contentsJA)
+			contents: Buffer.from(contentsJA)
 		});
 		jaFile.lang = "ja";
 		jaFile.originalPath = file.originalPath;

build/updateResources.js

@@ -1,9 +1,6 @@
-var path = require("path"),
-	fs = require("fs"),
+var fs = require("fs"),
 	cheerio = require("cheerio"),
-	through = require("through2"),
-	gutil = require("gulp-util"),
-	File = gutil.File;
+	through = require("through2");
 
 /**
  * Replace resource strings (src, href) and igLoader sources. Adds Japanese locale script for JA files.
@@ -85,7 +82,7 @@ module.exports = function (options) {
 		});
 
 
-		file.contents = new Buffer($.html(), encoding);
+		file.contents = Buffer.from($.html(), encoding);
 
 		stream.push(file);
 		next();

gulpfile.js

@@ -1,10 +1,10 @@
 var gulp = require("gulp"),
-	util = require("gulp-util"),
 	localize = require("./build/localizeFiles.js"),
 	updateResources = require("./build/updateResources.js"),
 	createFiddleFiles = require("./build/createFiddleFiles.js");
 
-var version = util.env.version; //should be passed as --version ${TRAVIS_BRANCH}
+var argv = require('minimist')(process.argv.slice(2));
+var version = argv.version; //should be passed as --version ${TRAVIS_BRANCH}
 
 var dist = "./dist",
 	copySrc = [
@@ -17,24 +17,24 @@ var dist = "./dist",
 	config = require("./build/config.json");
 
 	// Command line overrides:
-	if (util.env["ignite-ui"]) {
+	if (argv["ignite-ui"]) {
 		// Optional override for the Ignite UI source location, can be passed as --ignite-ui "http://<ignite-ui root>"
-		config.patterns["%%ignite-ui%%"] = util.env["ignite-ui"];
+		config.patterns["%%ignite-ui%%"] = argv["ignite-ui"];
 	}
 	if (version) {
 		config.patterns["%%ignite-ui%%"] = config.patterns["%%ignite-ui%%"].replace("latest", "20" + version + "/latest");
 	} else {
 		version = "latest";
 	}
-	if (util.env["live-url"]) {
+	if (argv["live-url"]) {
 		// Optional override for the live demo URL (without trailing slash). Warning: might be case-sensitive
-		config.liveUrl = util.env["live-url"].replace(/\/$/, "");
+		config.liveUrl = argv["live-url"].replace(/\/$/, "");
 	}
 
 	config.version = version.toString();
 	dist = dist + "/" + version;
 
-gulp.task("process-files", function () {
+gulp.task("process-files", () => {
 	console.log("Building samples for: ", version);
 	console.log("Ignite UI source root: ", config.patterns["%%ignite-ui%%"]);
 	console.log("Live URL base: ", config.liveUrl);
@@ -46,7 +46,9 @@ gulp.task("process-files", function () {
 		.pipe(gulp.dest(dist));
 });
 
-gulp.task("build-samples", ["process-files"], function () {
+gulp.task("copy-static-files", () => {
 	return gulp.src(copySrc, { base: "./" })
 		.pipe(gulp.dest("./dist"));
-});
+});
+
+gulp.task("build-samples", gulp.series("process-files", "copy-static-files"));