目前來說,對於構建小程序的,類似taro這些框架,生態已經挺完善的了,沒有什麼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,於是自己用webpack搞了一套框架,但有一個比較嚴重的問題,有一些文件依賴重複打包了,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。我們負責人終於受不了了,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 => js
sass=>wxss
wxml=>wxml
json=>json
由於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,於是寫了一個babel插件 babel-plugin-copy-npm。
這麼一想,其實不難,而且單文件編譯,那不是gulp的強項嗎!!!
最終效果:
而且由於增量更新,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,由於需要壓縮,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;