Sample gulpfile.js

gistfile1.js

"use strict";

var gulp = require('gulp'); // 4.0
var del = require('del');

var publicPath = "public_html";
var bowerComponentsPath = ".bower_components";
var vendorPath = publicPath + "/assets/vendor";


var paths = {
    jquery: {
        src: bowerComponentsPath + "/jquery/dist/jquery.min.js",
        dest: vendorPath + "/jquery"
    },
    bootstrap: {
        src: bowerComponentsPath + "/bootstrap/dist/**/*",
        dest: vendorPath + "/bootstrap"
    },
    fontawesome: {
        src: bowerComponentsPath + "/fontawesome/**/*",
        dest: vendorPath + "/font-awesome"
    },
    slippry: {
        src: bowerComponentsPath + "/slippry/**/*",
        dest: vendorPath + "/slippry"
    }
};


gulp.task('jquery', function () {
    return gulp.src(paths.jquery.src)
        .pipe(gulp.dest(paths.jquery.dest));
});

gulp.task('bootstrap', function () {
    return gulp.src(paths.bootstrap.src)
        .pipe(gulp.dest(paths.bootstrap.dest))
        .on('end', function () {
            del([
                vendorPath + '/bootstrap/css/*.*',
                '!' + vendorPath + '/bootstrap/css/bootstrap.min.css',
                '!' + vendorPath + '/bootstrap/css/bootstrap.css.map',
                vendorPath + '/bootstrap/js/bootstrap.js',
                vendorPath + '/bootstrap/js/npm.js',
            ]);
        });
});

gulp.task('fontawesome', function () {
    return gulp.src(paths.fontawesome.src)
        .pipe(gulp.dest(paths.fontawesome.dest))
        .on('end', function () {
            del([
                vendorPath + '/font-awesome/css/font-awesome.css',
                vendorPath + '/font-awesome/less',
                vendorPath + '/font-awesome/scss',
                vendorPath + '/font-awesome/bower.json'
            ]);
        });
});

gulp.task('slippry', function () {
    return gulp.src(paths.slippry.src)
        .pipe(gulp.dest(paths.slippry.dest))
        .on("end", function () {
            del([
                vendorPath + "/slippry/*",
                "!" + vendorPath + "/slippry/dist",
                "!" + vendorPath + "/slippry/images"
            ])
        });
});

/**
 * Delete vendor directory (for debugging)
 */
gulp.task('rollback', function (cb) {
    del([vendorPath], cb);
});

gulp.task('default', gulp.series('jquery', 'bootstrap', 'fontawesome', 'slippry'));