gulp搭建前端自动化开发环境

gulp是基于node编写的一个构建工具,有4个主要的API:
gulp.src() - 输出符合条件的文件
gulp.dest() - 能被pipe进来,并写文件
gulp.task() - 定义任务
gulp.watch() - 监听文件
 
首先,默认node环境已经安装;
全局安装gulp: npm i -g gulp
新建文件夹,npm初始化:npm init
作为项目开发依赖安装:npm i -D gulp
 
新建gulpfile.js,
 
var gulp = require('gulp');

gulp.task('default', function() {
  console.log('default');
});
 
执行命令gulp,ok。
 
一般需要区分开发和生产环境,
 
gulp.task('default', ['dev']);
gulp.task('dev', ['connect', 'watch']);
gulp.task('build', ['html-build', 'file-build'], function() {
    return gulp.src('dist/rev', { read: false })
        .pipe(clean());
});

 

需要的模块:
gulp-connect:开发阶段,因为的前后端分离的项目,所以需要一个web服务器, gulp-connect是一个带有livereload的web服务器
gulp-changed:可以过滤那些改动过的文件
gulp-babel:通过babel来使用新版es
gulp-sass: 编译sass
gulp-clean: 移除文件和文件夹
gulp-rev: 给静态资源文件加上hash
gulp-htmlmin: 压缩html
http-proxy-middleware:一个nodeJS代理的中间件
gulp-plumber:处理pipe破裂导致的错误
gulp-rev-collector : 从manifest中收集数据,然后替换在html模版里的链接
gulp-sourcemaps: 生产sourcemaps
gulp-tag-include-html: 可以使用include标签来将html元素引入到别的文件中
gulp-trim-js-css: 将style标签移动到head标签中,支持sass语法编译 将script标签移动到body的最后,支持es2015语法编译
rimraf: 为node实现的unix命令rm -rf
 
npm install --save-dev gulp-connect ...

引入,

var sass = require('gulp-sass'),
    proxy = require('http-proxy-middleware'),
    sourcemaps = require('gulp-sourcemaps'),
    babel = require('gulp-babel'),
    clean = require('gulp-clean'),
    rev = require('gulp-rev'),
    revCollector = require('gulp-rev-collector'),
    htmlmin = require('gulp-htmlmin'),
    plumber = require('gulp-plumber'),
    include = require('gulp-tag-include-html'),
    trimJsCss = require('gulp-trim-js-css'),
    path = require('path'),
    connect = require('gulp-connect'),
    changed = require('gulp-changed'),
    DEV_PATH = path.resolve(__dirname, './dev'),
    BASENAME = path.basename(__dirname),
    DIST_PATH = path.resolve(__dirname, 'dist/www', BASENAME);
开发阶段配置如下,
gulp.task('connect', function() {
    connect.server({
        root: DEV_PATH,
        port: 8080,
        livereload: true,
        middleware: function(connect, opt) { //设置代理
            return [
                proxy('/index', {
                    target: 'http://youwebsite.com',
                    changeOrigin: true
                })
            ]
        }
    });
});
// 数组里的任务会在你当前任务运行之前完成。
gulp.task('watch', ['html', 'js', 'css', 'file'], function() {
    gulp.watch('src/**/*.html', ['html']);
    gulp.watch('src/**/*.htm', ['htm']);
    gulp.watch('src/**/*.js', ['js']);
    gulp.watch('src/**/*.{css,scss}', ['css']);
    gulp.watch('src/**/*.!(html|htm|js|css|scss)', ['file']);
});
gulp.task('html', function() {
    return gulp.src('src/**/*.html')
        .pipe(changed('dev', { hasChanged: changed.compareLastModifiedTime }))
        .pipe(plumber())
        .pipe(include({
            begin: '<%',
            end: '%>'
        }))
        .pipe(trimJsCss())
        .pipe(gulp.dest('dev'))
        .pipe(connect.reload());
});
gulp.task('htm', ['html-all'], function(cb) {
    return gulp.src('src/**/*.html')
        .pipe(connect.reload());
});

gulp.task('html-all', function() {
    return gulp.src('src/**/*.html')
        .pipe(plumber())
        .pipe(include({
            begin: '<%',
            end: '%>'
        }))
        .pipe(trimJsCss())
        .pipe(gulp.dest('dev'));
});

gulp.task('js', function() {
    return gulp.src(['src/**/*.js', '!src/**/lib/**/*.*'])
        .pipe(changed('dev', { hasChanged: changed.compareLastModifiedTime }))
        .pipe(plumber())
        .pipe(sourcemaps.init())
        .pipe(babel({ presets: ['es2015'] }))
        .pipe(sourcemaps.write('.'))
        .pipe(gulp.dest('dev'))
        .pipe(connect.reload());
});

gulp.task('css', function() {
    return gulp.src(['src/**/*.{css,scss}', '!src/**/lib/**/*.*'])
        .pipe(changed('dev/', {
            hasChanged: changed.compareLastModifiedTime, //比较修改时间
            extension: '.css' //因为是.scss与.css 比较,所以要设置文件后缀
        }))
        .pipe(plumber())
        .pipe(sass({ outputStyle: 'expanded' }).on('error', sass.logError))
        .pipe(gulp.dest('dev'))
        .pipe(connect.reload());
});

gulp.task('file', function() {
    return gulp.src(['src/**/*.!(html|htm|js|css|scss)', 'src/**/lib/**/*.*'])
        .pipe(changed('dev/', { hasChanged: changed.compareLastModifiedTime }))
        .pipe(gulp.dest('dev'))
        .pipe(connect.reload());
});
生产阶段打包时,首先定义clean-build任务,供其他任务使用。
gulp.task('clean-build', function() {
    return gulp.src(['dist', 'dev'], { read: false })
        .pipe(clean());
});

然后分别定义css-build, file-build, js-build, html-build任务,打包得到上线所需代码。

gulp.task('js-build', ['clean-build'], function() {
    return gulp.src(['src/**/*.js', '!src/**/lib/**/*.*'])
        .pipe(babel({ presets: ['es2015'], minified: true, comments: false }))
        .pipe(rev())
        .pipe(gulp.dest(DIST_PATH))
        .pipe(rev.manifest())
        .pipe(gulp.dest('dist/rev/js'));
});
gulp.task('css-build', ['clean-build'], function() {
    return gulp.src(['src/**/*.{css,scss}', '!src/**/lib/**/*.*'])
        .pipe(sass({ outputStyle: 'compressed' }).on('error', sass.logError))
        .pipe(rev())
        .pipe(gulp.dest(DIST_PATH))
        .pipe(rev.manifest())
        .pipe(gulp.dest('dist/rev/css'));
});
gulp.task('file-build', ['clean-build'], function() {
    return gulp.src(['src/**/*.!(html|htm|js|css|scss)', 'src/**/lib/**/*.*'])
        .pipe(gulp.dest(DIST_PATH));
});

 

gulp.task('html-build', ['js-build', 'css-build'], function() {
    return gulp.src(['src/**/*.html', '!src/assets/lib', '!src/assets/lib/**', 'dist/rev/**/*.json'])
        .pipe(include({
            begin: '<%',
            end: '%>'
        }))
        .pipe(revCollector())
        .pipe(trimJsCss())
        .pipe(htmlmin({
            removeComments: true, //清除HTML注释
            collapseWhitespace: true, //压缩HTML
            minifyJS: true, //压缩页面JS
            minifyCSS: true //压缩页面CSS
        }))
        .pipe(gulp.dest(DIST_PATH));
});

 

posted @ 2019-04-11 22:33  贾各布  阅读(633)  评论(0编辑  收藏  举报