npm指令执行前执行自定义代码

1、基本逻辑

npm start执行前执行node ./bin/wb-handle

"scripts": {
    "wb": "node ./bin/wb-handle; npm start"
},

wb-handle源码，删除deleteNodeModules配置的最后一级目录文件

#!/usr/bin/env node --max-old-space-size=4096 --optimize-for-size --max_old_space_size=4096 --optimize_for_size

"use strict";

var deleteNodeModules = "abab/efg";

var fs = require("fs");

function deleteFolderRecursive(path) {
    if( fs.existsSync(path) ) {
        fs.readdirSync(path).forEach(function(file) {
            var curPath = path + "/" + file;
            if(fs.statSync(curPath).isDirectory()) { // recurse
                deleteFolderRecursive(curPath);
            } else { // delete file
                fs.unlinkSync(curPath);
            }
        });
        fs.rmdirSync(path);
    }
};

deleteFolderRecursive(`./node_modules/${deleteNodeModules}`)

2、推包到npm

接下来我们代码推包到npm使用

{
  "name": "wb-handle",
  "version": "1.0.2",
  "description": "delete mode_modules file",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "bin": {
    "wbhandle": "./bin/wb-handle.js"
  },
  "keywords": [
    "node"
  ],
  "author": "wangb",
  "license": "ISC"
}

wb-handle.js改进代码,可以在项目package.json配置deleteModule自动删除nodel_modules中的包

#!/usr/bin/env node --max-old-space-size=4096 --optimize-for-size --max_old_space_size=4096 --optimize_for_size

"use strict";


const path = require('path');
var fs = require("fs");


const appDirectory = fs.realpathSync(process.cwd());
const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
var packagePath = resolveApp("package.json")
var packageJson = require(packagePath);
var deleteModule = packageJson && packageJson.deleteModule;
if (!deleteModule) {
    console.log("请在package.json中输入deleteModule");
    return;
} 
function deleteFolderRecursive(path) {
    if( fs.existsSync(path) ) {
        fs.readdirSync(path).forEach(function(file) {
            var curPath = path + "/" + file;
            if(fs.statSync(curPath).isDirectory()) { // recurse
                deleteFolderRecursive(curPath);
            } else { // delete file
                fs.unlinkSync(curPath);
            }
        });
        fs.rmdirSync