目前來說,對于構建小程序的,類似taro這些框架,生態已經挺完善的了,沒有什么必要再搞一套來折騰自己。但是,我司的小程序,是很早之前就開發的,我們負責人當時信不過這些開源的框架,于是自己用webpack搞了一套框架,但有一個比較嚴重的問題,有一些文件依賴重復打包了,導致小程序包體積比較大。
持續了一個多月,主包體積在2M左右徘徊,開發都很難做下去。我們負責人終于受不了了,給了我個任務,讓我寫一個構建小程序的工具,減少小程序包體積。
我們現在的框架對比一下原生小程序,其實差別不大,無非就是
ts => jssass=>wxsswxml=>wxmljson=>json
由于我司小程序基礎庫是1.9.8的,不支持構建npm,所以node_modules的依賴包以及依賴路徑需要自己處理,于是寫了一個babel插件 babel-plugin-copy-npm。
這么一想,其實不難,而且單文件編譯,那不是gulp的強項嗎?。?!
最終效果:
而且由于增量更新,只修改改變的文件,所以編譯的速度非常快。
項目地址:https://github.com/m-Ryan/ry-wx
最終流程大概如下:清除dist目錄下的文件 => 編譯文件到dist目錄下=> 開發模式監聽文件更改,生產環境壓縮文件。
一、清除dist目錄下的文件 (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、編譯文件
1.編譯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.編譯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));};
編譯json,wxml,由于需要壓縮,所以需要分開處理
(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.拷貝其他靜態資源,例如字體、圖片
(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(`正在監聽文件... ${getNow()}`)); const watcher = gulp.watch("src/**/**"); watcher.on("change", function(filePath, stats) { compile(filePath); }); watcher.on("add", function(filePath, stats) { compile(filePath); }); watcher.on("unlink", function(filePath, stats) { let distFile = filePath.replace(/^src/b/, "dist"); let absolutePath = ""; if (distFile.endsWith(".ts")) { distFile = distFile.replace(/.ts$/, ".js"); } else if (distFile.endsWith(".scss")) { distFile = distFile.replace(/.scss$/, ".wxss"); } absolutePath = path.join(cwd, distFile); if (fs.existsSync(absolutePath)) { fs.unlinkSync(absolutePath); console.log( chalk.yellow(`刪除文件:${path.basename(distFile)} ${getNow()}`) ); } });}function compile(filePath) { console.info( chalk.green(`編譯完成:${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內容,希望對大家的學習有所幫助,也希望大家多多支持VEVB武林網。
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