lerna基本试用

yarn global add lerna
or 
npm install -g lerna

git init platform
cd platform
lerna init

效果如下：
├── lerna.json
├── package.json
└── packages

mkdir  common server 

common
├── index.js
└── package.json
index.js
module.exports={
name:"dalong-common 1.0.0",
type:"common"
}
package.json
{
"name": "common",
"version": "1.0.0",
"main": "index.js",
"license": "MIT"
}
server
├── index.js
├── package-lock.json
└── package.json
index.js
const common =require("common");
console.log(common);
package.json
{
"name": "server",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"dependencies": {
"common": "1.0.0",
"shortid": "^2.2.8"
}
}

lerna  bootstrap

node packages/server
{ name: ‘dalong-common 1.0.0‘, type: ‘common‘ }

这个只是简单的使用，实际可以做的事情的很多，比如changelog issue 。。。
类似的yarn 也是一个不错的工具