实现目的：return简写表达式还原,增强可读性

处理前 demo.js

function _0x30e2() {return a = 1, b = 2, c = 3, d = 4, a + b + c + d;
}console.log(_0x30e2());

处理后 demoNew.js

function _0x30e2() {a = 1, b = 2, c = 3, d = 4;return a + b + c + d;
}console.log(_0x30e2());

主逻辑源码 ObDecryFuMain.js

const fs = require("fs");//文件读写
const parse = require("@babel/parser"); //解析为ast
const traverse = require('@babel/traverse').default;//遍历节点
const t = require('@babel/types');//类型
const generator = require('@babel/generator').default;//ast解析为代码//读取js文件
const jscode = fs.readFileSync('./demo.js', {encoding: 'utf-8'}
);
let ast = parse.parse(jscode);//js转astfunction remove_return_comma(path) {// return简写表达式还原let pathargument = path.node.argument;if (!t.isSequenceExpression(pathargument))return;//获取数组的长度let arglength = path.node.argument.expressions.length;//数组填充let body = []for (i = 0; i < arglength - 1; i++) {//自执行特殊处理if (t.isCallExpression(path.node.argument.expressions[i])) {if (!t.isFunctionExpression(path.node.argument.expressions[i].callee)) return;let callee = path.node.argument.expressions[i].callee;if (!callee.id) {body[i] = t.identifier('!' + generator(path.node.argument.expressions[i]).code + ';');} else {body[i] = t.identifier(generator(path.node.argument.expressions[i]).code + ';');}} else {body[i] = t.identifier(generator(path.node.argument.expressions[i]).code + ';');}}//数组最后一个为return语句body[arglength - 1] = t.ReturnStatement(path.node.argument.expressions[arglength - 1]);//节点替换path.replaceInline(body)
}traverse(ast, {ReturnStatement: {exit: [remove_return_comma]},});      // 序列表达式还原
let {code} = generator(ast,opts = {jsescOption:{"minimal":true}})
//文件保存
fs.writeFile('./demoNew.js', code, (err) => {
});