var gulp = require('gulp'), // 必须先引入gulp插件    clean = require('gulp-clean'),  // 文件删除    less = require('gulp-less'), // less 编译    gutil = require('gulp-util'),// 控制台着色    cached = require('gulp-cached'), // 缓存当前任务中的文件，只让已修改的文件通过管道    uglify = require('gulp-uglify'), // js 压缩    rename = require('gulp-rename'), // 重命名    concat = require('gulp-concat'), // 合并文件    notify = require('gulp-notify'), // 修改提醒    cssnano = require('gulp-cssnano'), // CSS 压缩    imagemin = require('gulp-imagemin'), // 图片优化    browserSync = require('browser-sync'), // 保存自动刷新    autoprefixer = require('gulp-autoprefixer');// 添加 CSS 浏览器前缀//--------------------------common  tasks-----------------------------//编译less--发布到本文件夹下相应目录gulp.task('lessLocal', function() {    return gulp.src('src/css/*.less',{base:'./src'})    .pipe(cached('less'))    .pipe(less())    .pipe(autoprefixer('last 6 version'))    .pipe(gulp.dest('src'));});//|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||//编译lessEclipse——方便与开发联调，发布到tomcat和eclipse相应项目目录中gulp.task('lessEclipse', function() {    return gulp.src('src/cssEclispe/*.less',{base:'./src'})    .pipe(cached('less'))    .pipe(less())    .pipe(autoprefixer('last 6 version'))    .pipe(gulp.dest('src'));});gulp.task('distCopyEclipse',function(){    return gulp.src('src/cssEclispe/*',{nodir:true})    .pipe(cached('distCopyEclipse'))    .pipe(gulp.dest('D:/workSpace/makerplateform/webapp/instantcommunication/theme/css'))    .pipe(gulp.dest('D:/tomcat7/webapps/makerplateform/instantcommunication/theme/css'));});//||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||//distCopygulp.task('distCopy',function(){    return gulp.src('src/**/*',{base:'./src'})    .pipe(cached('distCopy'))    .pipe(gulp.dest('dist'));});//图片压缩gulp.task('imgmin', function() {    return gulp.src('src/img/**/*.{jpg,jpeg,png,gif}',{base:'./src'})    .pipe(cached('imgmin'))    // 取值范围：0-7（优化等级）,是否无损压缩jpg图片，是否隔行扫描gif进行渲染，是否多次优化svg直到完全优化    .pipe(imagemin({optimizationLevel: 5, progressive: true, interlaced: true, multipass: true}))    .pipe(gulp.dest('dist'));});//css压缩gulp.task('cssmin', function() {    return gulp.src(['src/**/*.css','!src/**/*.min.css','!src/lib/**/*.css'],{base:'./src'})    .pipe(cached('cssmin'))    .pipe(cssnano())    .pipe(gulp.dest('dist'));});//jsmingulp.task('jsmin', function() {    return gulp.src(['src/js/*.js','!src/js/*.min.js'],{base:'./src'})    .pipe(cached('jsmin'))    .pipe(uglify())    .pipe(gulp.dest('dist'));});//发布任务gulp.task('distMin',     gulp.series('lessLocal','distCopy',        gulp.parallel('imgmin','cssmin','jsmin')    ));gulp.task('distUnMin',     gulp.series('distCopy',        gulp.parallel('imgmin')    ));//---------------------- server  tasks-------------------------//浏览器刷新    gulp.task('default', function() {      browserSync.init({          //指定服务器启动根目录        server: "./src"    });      // gulp.watch('src/css/*.less',gulp.series('lessLocal'));    gulp.watch('src/cssEclispe/*.less',gulp.series('lessEclipse','distCopyEclipse'));    gulp.watch("./src/**/*.*").on('change',browserSync.reload);});