gulp build for libs

src/Admin/gulpfile.js

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+/// <binding BeforeBuild='build' Clean='clean' ProjectOpened='build' />
+
+const gulp = require('gulp'),
+    rimraf = require('rimraf'),
+    merge = require('merge-stream'),
+    runSequence = require('run-sequence'),
+    concat = require('gulp-concat'),
+    cssmin = require('gulp-cssmin'),
+    uglify = require('gulp-uglify'),
+    sass = require('gulp-sass');
+
+const paths = {};
+paths.webroot = './wwwroot/';
+paths.npmDir = './node_modules/';
+paths.sassDir = './Sass/';
+paths.libDir = paths.webroot + 'lib/';
+paths.cssDir = paths.webroot + 'css/';
+paths.jsDir = paths.webroot + 'js/';
+
+paths.sass = paths.sassDir + '**/*.scss';
+paths.minCss = paths.cssDir + '**/*.min.css';
+paths.js = paths.jsDir + '**/*.js';
+paths.minJs = paths.jsDir + '**/*.min.js';
+paths.libJs = paths.libDir + '**/*.js';
+paths.libMinJs = paths.libDir + '**/*.min.js';
+
+gulp.task('clean:js', (cb) => {
+    rimraf(paths.minJs, cb);
+});
+
+gulp.task('clean:css', (cb) => {
+    rimraf(paths.cssDir, cb);
+});
+
+gulp.task('clean:lib', (cb) => {
+    rimraf(paths.libDir, cb);
+});
+
+gulp.task('clean', ['clean:js', 'clean:css', 'clean:lib']);
+
+gulp.task('lib', ['clean:lib'], () => {
+    const libs = [
+        {
+            src: paths.npmDir + 'bootstrap/dist/js/*',
+            dest: paths.libDir + 'bootstrap/js'
+        },
+        {
+            src: paths.npmDir + 'popper.js/dist/*',
+            dest: paths.libDir + 'popper'
+        },
+        {
+            src: paths.npmDir + 'font-awesome/css/*',
+            dest: paths.libDir + 'font-awesome/css'
+        },
+        {
+            src: paths.npmDir + 'font-awesome/fonts/*',
+            dest: paths.libDir + 'font-awesome/fonts'
+        },
+        {
+            src: paths.npmDir + 'jquery/dist/jquery.slim*',
+            dest: paths.libDir + 'jquery'
+        },
+    ];
+
+    const tasks = libs.map((lib) => {
+        return gulp.src(lib.src).pipe(gulp.dest(lib.dest));
+    });
+    return merge(tasks);
+});
+
+gulp.task('sass', () => {
+    return gulp.src(paths.sass)
+        .pipe(sass({ outputStyle: 'compressed' }).on('error', sass.logError))
+        .pipe(gulp.dest(paths.cssDir));
+});
+
+gulp.task('sass:watch', () => {
+    gulp.watch(paths.sass, ['sass']);
+});
+
+gulp.task('build', function (cb) {
+    return runSequence('clean', ['lib', 'sass'], cb);
+});