Gulp practical configuration (2) - small and medium-sized projects-JS Tutorial-php.cn

The gulp configuration in the previous article is very simple, mainly for demo viewing and debugging. This article will be relatively detailed, including compression, merging, and timestamps.

In cities with relatively good Internet environments, larger projects that require multi-person collaboration should all use modularity (here mainly refers to commonjs and ES6 module systems, not the earlier require.js and sea.js) . The code will also focus more on how to separate and inject, rather than simply merging.

But in many small companies, the development models or technologies are still relatively traditional, or some small projects do not need to use the more cutting-edge technologies at all.

So this configuration is mainly for such small and medium-sized projects.

1. Required tools and versions

Package management tool: yarn v0.24.5

Automated build tool: gulp v4.0

2.Tool installation

yarn add global gulpjs/gulp#4.0

3. Development environment configuration

<span style="color: #0000ff">var</span> gulp = require('gulp'<span style="color: #000000">),
    pug </span>= require('gulp-pug'<span style="color: #000000">),
    less </span>= require('gulp-less'<span style="color: #000000">),
    </span><span style="color: #008000">//</span><span style="color: #008000">当发生异常时提示错误 确保本地安装gulp-notify和gulp-plumber</span>
    notify = require('gulp-notify'<span style="color: #000000">),
    plumber </span>= require('gulp-plumber'<span style="color: #000000">),
    sourcemaps </span>= require('gulp-sourcemaps'<span style="color: #000000">),
    browserSync </span>= require('browser-sync'<span style="color: #000000">).create()
    reload </span>=<span style="color: #000000"> browserSync.reload;

</span><span style="color: #0000ff">var</span> LessAutoprefix = require('less-plugin-autoprefix'<span style="color: #000000">),
    autoprefix </span>= <span style="color: #0000ff">new</span> LessAutoprefix({ browsers: ['last 2 versions'<span style="color: #000000">] });

</span><span style="color: #008000">//</span><span style="color: #008000"> 文件路径</span>
<span style="color: #0000ff">var</span> paths =<span style="color: #000000"> {
  pug: {
    src: </span>'src/pug/pages/*.pug'<span style="color: #000000">,
    dest: </span>'dev/html/'<span style="color: #000000">,
    watch: </span>'src/pug/**/*.pug'<span style="color: #000000">
  },
  less: {
    src: </span>'src/less/**/*.less'<span style="color: #000000">,
    dest: </span>'dev/css/'<span style="color: #000000">,
    watch: </span>'src/less/**/*.less'<span style="color: #000000">
  },
  js: {
    src: </span>'src/js/**/*.js'<span style="color: #000000">,
    dest: </span>'dev/js/'<span style="color: #000000">,
    watch: </span>'src/js/**/*.js'<span style="color: #000000">
  },
  img: {
    src: </span>'src/img/**/*'<span style="color: #000000">,
    dest: </span>'dev/img/'<span style="color: #000000">,
    watch: </span>'src/img/**/*'<span style="color: #000000">
  }
}

</span><span style="color: #008000">//</span><span style="color: #008000"> 启动 browserSync 服务，自己启动server，并且为浏览器实时刷新提供服务</span>
gulp.task('browserSync', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> browserSync.init({
    server: {
      baseDir: </span>'./'<span style="color: #000000">
    },
    files: </span>'./dev/**/*'<span style="color: #000000">
  });
})

</span><span style="color: #008000">//</span><span style="color: #008000"> 将pug文件转换为html</span>
gulp.task('pug', <span style="color: #0000ff">function</span><span style="color: #000000"> buildHTML() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> gulp.src(paths.pug.src)
    .pipe(plumber({errorHandler: notify.onError(</span>'Error: <%= error.message %>'<span style="color: #000000">)}))
    .pipe(pug())
    .pipe(gulp.dest(paths.pug.dest));
});

</span><span style="color: #008000">//</span><span style="color: #008000"> 编译less文件</span>
gulp.task('less', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> gulp.src(paths.less.src)
    .pipe(plumber({errorHandler: notify.onError(</span>'Error: <%= error.message %>'<span style="color: #000000">)}))
    .pipe(sourcemaps.init())
    .pipe(less({
      plugins: [autoprefix]
    }))
    .pipe(sourcemaps.write())
    .pipe(gulp.dest(paths.less.dest));
})

</span><span style="color: #008000">//</span><span style="color: #008000"> 复制js文件</span>
gulp.task('js', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> gulp.src(paths.js.src)
    .pipe(gulp.dest(paths.js.dest));
})

</span><span style="color: #008000">//</span><span style="color: #008000"> 复制img文件</span>
gulp.task('img', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> gulp.src(paths.img.src)
    .pipe(gulp.dest(paths.img.dest));
})


</span><span style="color: #008000">//</span><span style="color: #008000"> 监听文件变化</span>
gulp.task('watch', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  gulp.watch(paths.pug.watch, gulp.parallel(</span>'pug'<span style="color: #000000">))
  gulp.watch(paths.less.watch, gulp.parallel(</span>'less'<span style="color: #000000">))
  gulp.watch(paths.js.watch, gulp.parallel(</span>'js'<span style="color: #000000">))
  gulp.watch(paths.img.watch, gulp.parallel(</span>'img'<span style="color: #000000">))
})

</span><span style="color: #008000">//</span><span style="color: #008000"> 默认任务，在命令行输入`gulp`来启动任务</span>
gulp.task('default', gulp.parallel('watch', 'browserSync', 'pug', 'less', 'js'))

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gulp-pug This plug-in is used to compile pug templates, which are the previous jade templates. The pug template is a very powerful front-end and universal template engine, and it is also very simple to learn. For specific usage, please see my other article A tutorial article about pug - Blog system based on express+mongodb+pug - pug article.

Everyone knows that when gulp is monitoring tasks, if an error occurs in some link, gulp will be interrupted, and then the gulp task will have to be restarted. This is a very troublesome thing. . Here you can use two plug-ins, gulp-notify and gulp-plumber, to avoid gulp task interruption.

4. Production environment configuration

<span style="color: #0000ff">var</span> gulp = require('gulp'<span style="color: #000000">),
  del </span>= require('del'<span style="color: #000000">),
  pug </span>= require('gulp-pug'<span style="color: #000000">),
  less </span>= require('gulp-less'<span style="color: #000000">),
  cleanCSS </span>= require('gulp-clean-css'<span style="color: #000000">),
  base64 </span>= require('gulp-tobase64'<span style="color: #000000">),
  </span><span style="color: #008000">//</span><span style="color: #008000"> img64 = require('gulp-imgbase64'),</span>
  imagemin = require('gulp-imagemin'<span style="color: #000000">),
  babel </span>= require('gulp-babel'<span style="color: #000000">),
  uglify </span>= require('gulp-uglify'<span style="color: #000000">),
  rev </span>= require('gulp-rev'), <span style="color: #008000">//</span><span style="color: #008000"> 添加时间戳</span>
  revCollector = require('gulp-rev-collector'<span style="color: #000000">);


</span><span style="color: #0000ff">var</span> LessAutoprefix = require('less-plugin-autoprefix'<span style="color: #000000">),
  autoprefix </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> LessAutoprefix({
    browsers: [</span>'last 2 versions'<span style="color: #000000">]
  });

</span><span style="color: #008000">//</span><span style="color: #008000"> 文件路径</span>
<span style="color: #0000ff">var</span> paths =<span style="color: #000000"> {
  pug: {
    src: </span>'src/pug/pages/*.pug'<span style="color: #000000">,
    dest: </span>'dist/html/'<span style="color: #000000">
  },
  less: {
    src: </span>'src/less/main.less'<span style="color: #000000">,
    dest: </span>'dist/css/'<span style="color: #000000">
  },
  js: {
    src: [</span>'src/js/**/*.js', '!src/js/lib/*.js'<span style="color: #000000">],
    dest: </span>'dist/js/'<span style="color: #000000">
  },
  img: {
    src: </span>'src/img/**/*'<span style="color: #000000">,
    dest: </span>'dist/img/'<span style="color: #000000">
  }
};


</span><span style="color: #008000">//</span><span style="color: #008000"> 将pug文件转换为html</span>
gulp.task('pug', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> gulp.src(paths.pug.src)
    .pipe(pug())
    .pipe(gulp.dest(paths.pug.dest));
});

</span><span style="color: #008000">//</span><span style="color: #008000"> 编译less文件</span>
gulp.task('less', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> gulp.src(paths.less.src)
    .pipe(less({
      plugins: [autoprefix]
    }))
    .pipe(base64({
      maxsize: </span>8<span style="color: #000000">
    }))
    .pipe(cleanCSS({
      compatibility: </span>'ie8' <span style="color: #008000">//</span><span style="color: #008000"> 兼容性前缀保留</span>
<span style="color: #000000">    }))
    .pipe(rev())
    .pipe(gulp.dest(paths.less.dest))
    .pipe(rev.manifest())
    .pipe(gulp.dest(</span>'rev/css'<span style="color: #000000">))
});

</span><span style="color: #008000">//</span><span style="color: #008000"> 压缩图片</span>
gulp.task('img', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> gulp.src(paths.img.src)
    .pipe(imagemin({
      optimizationLevel: </span>3<span style="color: #000000">,
      progressive: </span><span style="color: #0000ff">true</span><span style="color: #000000">,
      interlaced: </span><span style="color: #0000ff">true</span><span style="color: #000000">
    }))
    .pipe(gulp.dest(paths.img.dest));
});

</span><span style="color: #008000">//</span><span style="color: #008000"> 编译JS文件</span>
gulp.task('js', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span><span style="color: #000000"> gulp.src(paths.js.src)
    .pipe(babel({
      presets: [</span>'es2015'<span style="color: #000000">]
    }))
    .pipe(uglify())
    .pipe(rev())
    .pipe(gulp.dest(paths.js.dest))
    .pipe(rev.manifest())
    .pipe(gulp.dest(</span>'rev/js'<span style="color: #000000">));
});
</span><span style="color: #008000">//</span><span style="color: #008000"> 引用的外部 JS 库，不需要做压缩和打时间戳等处理</span><span style="color: #008000">
//</span><span style="color: #008000"> 所以直接复制就行</span>
gulp.task('copyJs', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span> gulp.src('src/js/lib/*.js'<span style="color: #000000">)
    .pipe(gulp.dest(</span>'dist/js/lib/'<span style="color: #000000">))
})

</span><span style="color: #008000">//</span><span style="color: #008000"> 替换加了MD5时间戳的文件</span>
gulp.task('rev', gulp.series(gulp.parallel('img64', 'less', 'js'), <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span> gulp.src(['rev/**/*.json', 'dist/html/*.html'<span style="color: #000000">])
    .pipe(revCollector({
      replaceReved: </span><span style="color: #0000ff">true</span><span style="color: #000000">
    }))
    .pipe(gulp.dest(paths.pug.dest));
}));
</span><span style="color: #008000">//</span><span style="color: #008000"> Clean 任务执行前，先清除之前生成的文件</span>
gulp.task('clean', <span style="color: #0000ff">function</span><span style="color: #000000">() {
  </span><span style="color: #0000ff">return</span> del('dist/'<span style="color: #000000">)
});

</span><span style="color: #008000">//</span><span style="color: #008000"> 默认任务，在命令行输入`gulp`来启动任务</span>
gulp.task('default', gulp.series('clean', gulp.series('img', gulp.parallel('rev', 'copyJs'))))

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In the production environment, the code needs to be compressed and merged. In addition, every time the code is updated and a new version is released, in order for the user client to download the updated code, we also need to timestamp the CSS and JS files.

gulp-rev is a plug-in specifically designed to stamp files with MD5. After MD5 stamping, of course, the references in the HTML file also need to be changed. It will definitely be a very troublesome thing to manually change each one. So we also need the gulp-rev-collector plug-in to help us replace files stamped with MD5.

gulp-imgbase64, this plug-in can specify which img elements in the HTML file are converted to base64. If you need more personalized conversion, you can use this plug-in.

5.Project directory structure

XXX——

| — dist

　　| — html

　　| — css

　　| — img

　　| — js

　　　| — lib

| — dev

　　| — html

　　| — css

　　| — img

　　| — js

　　　| — lib

| — src

　　| — pug

　　　| — components

　　　| — pages

　　　| — layout.pug

　　| — less

　　　| — pages

　　　| — main.less

　　　| — reset.less

　　　| — common.less

| — feature.less

　　| — img

　　| — js

　　　| — lib

The src folder contains the main business code, which contains code that requires long-term maintenance.

The dev folder is where gulp generates code during development.

The

dist folder is where gulp generates code when generating.

In this configuration, I did not put the code generated through gulp during development in the src folder like many other people did, because that would cause a lot of reference troubles and separate the development and production The code environment is separated, which can keep the src folder pure without any messy code.

So for some files that have not been processed by gulp, I will copy them directly to the corresponding location in the dev or dist folder.

The dist folder will be cleared before each gulp task generates code, so we don't need to care about the contents of the dist folder.

The dev folder may have a lot of redundant files, but we don’t need to worry about it having any impact on us. It doesn’t matter if files are deleted or overwritten, we just need to ensure that the files in the src folder are correct.

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