问更改gulp任务结构以匹配Gulp v4

EN

///// Plugin Includes /////
var gulp = require('gulp'),
        uglify = require('gulp-uglify'),
        plumber = require('gulp-plumber'),
        concat = require('gulp-concat'),
        jshint = require('gulp-jshint'),
        autoprefixer = require('gulp-autoprefixer'),
        browserSync = require('browser-sync'),
        reload = browserSync.reload,
        sass = require('gulp-sass');

///// Compile/Validate JS /////
function js(){
    gulp.src('./assets/js/main.js')
    .pipe(plumber())
    .pipe(jshint())
    .pipe(jshint.reporter('default', { verbose: true }))
    .pipe(concat('main.min.js'))
    .pipe(uglify())
    .pipe(gulp.dest('./js/dist/'))
};

///// Compile Sass /////
function sass(){
    gulp.src('./assets/scss/style.scss')
    .pipe(plumber())
    .pipe(sass().on('error', sass.logError))
    .pipe(sass( {outputStyle: 'compressed'} ))
    .pipe(autoprefixer('last 2 versions'))
    .pipe(gulp.dest('./'))
    .pipe(browserSync.stream())
};

///// Get PHP /////
function php(){
    gulp.src('./**/*.php')
    .pipe(gulp.dest('./'))
};

///// Browser Sync /////
function browsersync(){
    browserSync.init({
        proxy: "bshaia.test",
        notify: false
    });
    gulp.watch('./assets/scss/**/*.scss', sass);
    gulp.watch('./assets/js/main.js', js).on('change', browserSync.reload);
    gulp.watch('./**/*.php', php).on('change', browserSync.reload);
};

//////////////////////////////
// Default Task
//////////////////////////////
gulp.task('default', browsersync);