一、打包执行自定义js文件

1.新建sysInfo.json文件

{
    "version": "20240307@1.0.1"
}

2.新建addVersion.js文件,打包时执行,将版本号写入sysInfo.json文件

//npm run build打包前执行此段代码
let fs = require('fs')

//返回package的json数据
function getPackageJson() {
  let data = fs.readFileSync('./src/assets/json/sysInfo.json') //fs读取文件
  return JSON.parse(data) //转换为json对象
}

let packageData = getPackageJson() //获取package的json
let arr = packageData.version.split('@') //切割后的版本号数组
let date = new Date()
const year = date.getFullYear()
let month = date.getMonth() + 1
let day = date.getDate()
month = month > 9 ? month : '0' + month
day = day < 10 ? '0' + day : day
let today = `${year}${month}${day}`
let verarr = arr[1].split('.')
verarr[2] = parseInt(verarr[2]) + 1
packageData.version = today + '@' + verarr.join('.') //转换为以"."分割的字符串
//用packageData覆盖package.json内容
fs.writeFile('./src/assets/json/sysInfo.json', JSON.stringify(packageData, null, '\t'), err => {
  console.log(err)
})

3.package.json中配置

  "scripts": {
    "dev": "vite",
    "serve": "vite",
    "build": "node ./src/addVersion.js && vite build",
    ....

4.使用

import sysInfo from '@/assets/json/sysInfo.json'

二、使用对应打包工具(vite,webpack...)的自定义扩展plugin

1.新建incrementPackageVersionPlugin.ts文件

import fs from 'fs'; 
export const function incrementPackageVersionPlugin = ()=> { 
    return { 
        name: 'increment-package-version-plugin', 
        // writeBundle ---vite生命周期钩子函数,打包时会调用
        writeBundle(opts, bundle) {  
            const packageJsonPath = './package.json'; 
            try { 
                const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf-8')); 
                packageJson.version = incrementVersion(packageJson.version); 
                fs.writeFileSync(packageJsonPath, JSON.stringify(packageJson, null, 2)); 
            } catch (error) { 
                console.error('Error reading or writing package.json:', error); 
            } 
        } 
    }; 
} 
function incrementVersion(version) { 
    const parts = version.split('.'); 
    parts[parts.length - 1] = String(parseInt(parts[parts.length - 1]) + 1); 
    return parts.join('.'); 
}

2.在 vite.config.js 中引入并使用这个自定义插件：

import { defineConfig } from 'vite'; 
import vue from '@vitejs/plugin-vue'
import { incrementPackageVersionPlugin } from './incrementPackageVersionPlugin'; 
export default defineConfig(({ command, mode })=>{
    return {
        base: '',
        resolve: {
          alias: {
          '@': resolve(__dirname, './src')
          }
        },
        ......,
        
        plugins: [ vue(), incrementPackageVersionPlugin() ],
        
        ......
    }
});