gulp构建小程序的方法步骤
(编辑:jimmy 日期: 2024/11/2 浏览:3 次 )
目前来说,对于构建小程序的,类似taro这些框架,生态已经挺完善的了,没有什么必要再搞一套来折腾自己。但是,我司的小程序,是很早之前就开发的,我们负责人当时信不过这些开源的框架,于是自己用webpack搞了一套框架,但有一个比较严重的问题,有一些文件依赖重复打包了,导致小程序包体积比较大。
持续了一个多月,主包体积在2M左右徘徊,开发都很难做下去。我们负责人终于受不了了,给了我个任务,让我写一个构建小程序的工具,减少小程序包体积。
我们现在的框架对比一下原生小程序,其实差别不大,无非就是
ts => js sass=>wxss wxml=>wxml json=>json
由于我司小程序基础库是1.9.8的,不支持构建npm,所以node_modules的依赖包以及依赖路径需要自己处理,于是写了一个babel插件 babel-plugin-copy-npm。
这么一想,其实不难,而且单文件编译,那不是gulp的强项吗!!!
最终效果:
而且由于增量更新,只修改改变的文件,所以编译的速度非常快。
项目地址:https://github.com/m-Ryan/ry-wx
最终流程大概如下:清除dist目录下的文件 => 编译文件到dist目录下=> 开发模式监听文件更改,生产环境压缩文件。
一、清除dist目录下的文件 (clean.js)
const del = require('del'); const fs = require('fs'); const path = require('path'); const cwd = process.cwd(); module.exports = function clean() { if (!fs.existsSync(path.join(cwd, 'dist'))) { fs.mkdirSync('dist'); return Promise.resolve(null); } return del([ '*', '!npm' ], { force: true, cwd: path.join(cwd, 'dist') }); };
二、编译文件
1.编译typescript(compileJs.js)
const gulp = require('gulp'); const { babel } = require('gulp-load-plugins')(); const path = require('path'); const cwd = process.cwd(); module.exports = function compileJs(filePath) { let file = 'src/**/*.ts'; let dist = 'dist'; if (typeof filePath === 'string') { file = path.join(cwd, filePath); dist = path.dirname(file.replace(/src/, 'dist')); } return gulp.src(file).pipe(babel()).pipe(gulp.dest(dist)); };
2.编译sass(compileSass.js)
const gulp = require('gulp'); const { sass, postcss, rename } = require('gulp-load-plugins')(); const path = require('path'); const cwd = process.cwd(); const plugins = [ require('autoprefixer')({ browsers: [ 'ios >= 8', 'ChromeAndroid >= 53' ], remove: false, add: true }), require('postcss-pxtorpx')({ multiplier: 2, propList: [ '*' ] }) ]; module.exports = function compileSass(filePath) { let file = 'src/**/*.scss'; let dist = 'dist'; if (typeof filePath === 'string') { file = path.join(cwd, filePath); dist = path.dirname(file.replace(/src/, 'dist')); } return gulp .src(file) .pipe(sass({ outputStyle: 'compressed' }).on('error', sass.logError)) .pipe(postcss(plugins)) .pipe( rename({ extname: '.wxss' }) ) .pipe(gulp.dest(dist)); };
编译json,wxml,由于需要压缩,所以需要分开处理
(copyJson.js)
const gulp = require('gulp'); module.exports = function copyJson() { let file = 'src/**/*.json'; let dist = 'dist'; if (typeof filePath === 'string') { file = path.join(cwd, filePath); dist = path.dirname(file.replace(/src/, 'dist')); } return gulp.src([ file ]).pipe(gulp.dest(dist)); };
(copyWxml.js)
const gulp = require('gulp'); const minifyHtml = require('gulp-html-minify'); module.exports = function copyWxmlFiles() { let file = 'src/**/*.wxml'; let dist = 'dist'; if (typeof filePath === 'string') { file = path.join(cwd, filePath); dist = path.dirname(file.replace(/src/, 'dist')); } return gulp.src(file).pipe(minifyHtml()).pipe(gulp.dest(dist)); };
4.拷贝其他静态资源,例如字体、图片
(copyAssets.js)
const gulp = require("gulp"); module.exports = function copyAssets() { let file = "src/**/**"; let dist = "dist"; if (typeof filePath === "string") { file = path.join(cwd, filePath); dist = path.dirname(file.replace(/src/, "dist")); } return gulp .src([ file, "!**/*.json", "!**/*.ts", "!**/*.js", "!**/*.scss", "!**/*.wxml" ]) .pipe(gulp.dest(dist)); };
5.引入文件(gulpfile.js)
const gulp = require("gulp"); const clean = require("./build/clean"); const compileJs = require("./build/compileJs"); const compileSass = require("./build/compileSass"); const copyJson = require("./build/copyJson"); const copyWxml = require("./build/copyWxml"); const copyAssets = require("./build/copyAssets"); const fs = require("fs-extra"); const path = require("path"); const chalk = require("chalk"); const cwd = process.cwd(); const dayjs = require("dayjs"); const tasks = [ clean, gulp.parallel([compileJs, compileSass, copyJson, copyWxml]), copyAssets ]; if (process.env.NODE_ENV === "development") { tasks.push(watch); } gulp.task("default", gulp.series(tasks)); gulp.task("watch", watch); function watch() { console.log(chalk.blue(`正在监听文件... ${getNow()}`)); const watcher = gulp.watch("src/**/**"); watcher.on("change", function(filePath, stats) { compile(filePath); }); watcher.on("add", function(filePath, stats) { compile(filePath); }); watcher.on("unlink", function(filePath, stats) { let distFile = filePath.replace(/^src\b/, "dist"); let absolutePath = ""; if (distFile.endsWith(".ts")) { distFile = distFile.replace(/.ts$/, ".js"); } else if (distFile.endsWith(".scss")) { distFile = distFile.replace(/.scss$/, ".wxss"); } absolutePath = path.join(cwd, distFile); if (fs.existsSync(absolutePath)) { fs.unlinkSync(absolutePath); console.log( chalk.yellow(`删除文件:${path.basename(distFile)} ${getNow()}`) ); } }); } function compile(filePath) { console.info( chalk.green(`编译完成:${path.basename(filePath)} ${getNow()}`) ); if (filePath.endsWith(".ts")) { compileJs(filePath); } else if (filePath.endsWith(".scss")) { compileSass(filePath); } else if (filePath.endsWith(".wxml")) { copyWxml(filePath); } else if (filePath.endsWith(".json")) { copyJson(filePath); } else { copyAssets(filePath); } } function getNow() { return dayjs().format("HH:mm:ss"); }
babel的配置如下.babelrc.js
const babelOptions = { presets: [ '@babel/preset-typescript', [ '@babel/env' ] ], plugins: [ 'lodash', [ '@babel/plugin-proposal-decorators', { legacy: true } ], 'babel-plugin-add-module-exports', [ '@babel/plugin-transform-runtime', { corejs: false, helpers: true, regenerator: true, useESModules: false } ], [ 'module-resolver', { root: [ '.' ], alias: { '@': './src' } } ], [ 'babel-plugin-copy-npm', { rootDir: 'src', outputDir: 'dist', npmDir: 'npm', format: 'cjs', strict: false, minify: true, loose: true, cache: true } ] ] }; if (process.env.NODE_ENV === 'production') { babelOptions.presets.unshift([ 'minify', { mangle: { exclude: [ 'wx', 'module', 'exports', '__wxConfigx', 'process', 'global' ] }, keepFnName: true } ]); } module.exports = babelOptions;
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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