gulpfile.js

var gulp = require("gulp"),
	minifycss = require("gulp-minify-css"),
	uglify = require("gulp-uglify"),
	concat = require("gulp-concat"),
	rename = require("gulp-rename");

gulp.task("css", function() {
	return gulp.src([
			"content/css/kendo.common.min.css",
			"content/css/kendo.bootstrap.min.css",
			"content/css/bootstrap.css",
			"content/css/bootstrap-responsive.css",
			"content/css/font-awesome.css",
			"content/css/style.css"
		])
		.pipe(concat("all.css"))
		.pipe(gulp.dest("content/css/"))
		.pipe(rename({ suffix: ".min" }))
		.pipe(minifycss())
		.pipe(gulp.dest("content/css/"));
});

gulp.task("scripts", function() {
	return gulp.src([
			"content/js/libs/bootstrap.js",
			"content/js/libs/kendo.web.min.js",
			"content/js/libs/spin.min.js",
			"content/js/libs/handlebars-v1.3.0.js",
			"content/js/libs/highcharts.src.js",
			"content/js/libs/jquery.printPage.js",
			"content/js/app.js",
			"content/js/custom-modules.js"
		])
		.pipe(concat("all.js"))
		.pipe(gulp.dest("content/js/"))
		.pipe(rename({ suffix: ".min" }))
		.pipe(uglify())
		.pipe(gulp.dest("content/js/"));
});

gulp.task("cssForPrintPage", function() {
	return gulp.src([
			"content/css/bootstrap.css",
			"content/css/bootstrap-responsive.css",
			"content/css/style-print.css"
		])
		.pipe(concat("printer.css"))
		.pipe(gulp.dest("content/css/"))
		.pipe(rename({ suffix: ".min" }))
		.pipe(minifycss())
		.pipe(gulp.dest("content/css/"));
});

gulp.task("cssForWelcomePage", function() {
	return gulp.src([
			"content/css/bootstrap.css",
			"content/css/font-awesome.css",
			"content/css/style.css"
		])
		.pipe(concat("welcome.css"))
		.pipe(gulp.dest("content/css/"))
		.pipe(rename({ suffix: ".min" }))
		.pipe(minifycss())
		.pipe(gulp.dest("content/css/"));
});

gulp.task("scriptsForWelcomePage", function() {
	return gulp.src([
			"content/js/libs/jquery-2.1.0.js",
			"content/js/libs/bootstrap.js",
			"content/js/custom-modules.js",
			"content/js/login.js",
		])
		.pipe(concat("welcome.js"))
		.pipe(gulp.dest("content/js/"))
		.pipe(rename({ suffix: ".min" }))
		.pipe(uglify())
		.pipe(gulp.dest("content/js/"));
});

gulp.task("default", function() {
	gulp.run("css");
	gulp.run("scripts");
	gulp.run("cssForPrintPage");
	gulp.run("cssForWelcomePage");
	gulp.run("scriptsForWelcomePage");
});