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| 'use strict';
const path = require('path');
const ts = require("rollup-plugin-typescript2");
const glob = require("glob")
const fs = require("fs-extra")
const commonjs = require('@rollup/plugin-commonjs');
const rollup = require('rollup');
const { terser } = require('rollup-plugin-terser')
function getFileSize(path) {
const stats = fs.statSync(path)
const fileSizeInBytes = stats.size;
const ret = fileSizeInBytes / 1024
return ret.toFixed(4)
}
async function treeShakeCocos(options) {
Editor.log("shake index.js start")
const destPath = options.dest
const indexJS = path.join(destPath, "assets", "main", "index.js")
const oldSize = getFileSize(indexJS)
try {
const bundle = await rollup.rollup({
input: "entrypoint.js",
plugins: [
commonjs(),
createEntryPointPlugin(options),
ts({
cwd: path.join(".", "packages", "wechatgame_build"),
tsconfig: "tsconfig.rollup.json",
check: false,
}),
cocosUUIDPlugin(),
],
})
await bundle.write({
file: indexJS,
format: "es",
minify: true,
plugins: [
terser({
output: {
comments: false,
ascii_only: true, // 仅输出 ascii 字符
beautify: false,// 最紧凑的输出
},
compress: {
collapse_vars: true, // 内嵌定义了但是只用到一次的变量
reduce_vars: true, // 提取出出现多次但是没有定义成变量去引用的静态值
},
}),
],
})
await bundle.close()
const newSize = getFileSize(indexJS)
Editor.log("shake index.js end, reduce size from", oldSize + " KB", "to", newSize + " KB")
} catch (err) {
Editor.log("Failed to tree shake cocos project", err)
}
}
async function onBuildFinished(options, callback) {
process.chdir(options.project)
await treeShakeCocos(options)
callback()
}
function createEntryPointPlugin(options) {
return {
name: "create-entry-point",
resolveId(source) {
if (source === "entrypoint.js") {
return source;
}
return null;
},
load(id) {
if (id === "entrypoint.js") {
return createEntryPoint(options);
}
return null;
},
};
}
async function createEntryPoint(options) {
const files = await Promise.all([
fetchCode(options, "scripts"),
]);
const imports = files.flat().map((file) => `import "./${file}"`);
return imports.flat().join("\n");
}
async function fetchCode(options, base) {
return new Promise((resolve, reject) => {
glob(`assets/${base}/**/!(*.d).ts`, function (err, files) {
if (err) {
reject(err);
} else {
resolve(files);
}
});
});
}
function cocosUUIDPlugin() {
return {
name: "create-entry-point",
resolveId(source) {
return null;
},
async transform(code, id) {
if (id.endsWith(".ts") && !id.endsWith("cchelper.ts") && /cc\._decorator/.test(code)) {
const uuid = await loadUUID(id)
const result = [
`cc._RF.push({exports:{}}, "${uuid}", "${/.*\/([^\/]*)\.ts/.exec(id)[1]}");`,
code,
`cc._RF.pop();`
].join("\n")
return result;
}
return null;
},
};
}
async function loadUUID(codePath) {
const metaSrc = await fs.readFile(codePath + ".meta", "utf-8");
const mate = JSON.parse(metaSrc);
return c.compressUuid(mate.uuid, false);
}
let t = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
let r = new Array(128);
for (let i = 0; i < 128; ++i) {
r[i] = 0;
}
for (i = 0; i < 64; ++i){
r[t.charCodeAt(i)] = i;
}
const n = /-/g,
s = /^[0-9a-fA-F-]{36}$/,
o = /^[0-9a-fA-F]{32}$/;
const c = {
compressUuid: function (e, t) {
if (s.test(e)) e = e.replace(n, "");
else if (!o.test(e)) return e;
let r = !0 === t ? 2 : 5;
return c.compressHex(e, r);
},
compressHex: function (e, r) {
let n = e.length;
let i = void 0 !== r ? r : n % 3;
for (var s = e.slice(0, i), o = []; i < n;) {
var u = parseInt(e[i], 16),
a = parseInt(e[i + 1], 16),
c = parseInt(e[i + 2], 16);
o.push(t[(u << 2) | (a >> 2)]), o.push(t[((3 & a) << 4) | c]), (i += 3);
}
return s + o.join("");
},
decompressUuid: function (e) {
if (23 === e.length) {
let t = [];
for (let i = 5; i < 23; i += 2) {
let n = r[e.charCodeAt(i)],
s = r[e.charCodeAt(i + 1)];
t.push((n >> 2).toString(16)),
t.push((((3 & n) << 2) | (s >> 4)).toString(16)),
t.push((15 & s).toString(16));
}
e = e.slice(0, 5) + t.join("");
} else {
if (22 !== e.length) return e;
{
let t = [];
for (let i = 2; i < 22; i += 2) {
let n = r[e.charCodeAt(i)],
s = r[e.charCodeAt(i + 1)];
t.push((n >> 2).toString(16)),
t.push((((3 & n) << 2) | (s >> 4)).toString(16)),
t.push((15 & s).toString(16));
}
e = e.slice(0, 2) + t.join("");
}
}
return [e.slice(0, 8), e.slice(8, 12), e.slice(12, 16), e.slice(16, 20), e.slice(20)].join("-");
},
};
module.exports = {
load() {
Editor.Builder.on("build-finished", onBuildFinished)
},
unload() {
Editor.Builder.removeListener("build-finished", onBuildFinished)
},
};
|