vue 多环境打包

1、修改packjson

新增一个要编译的命令

"builddev": "node build/builddev.js"

2、新建一个builddev.js

process.env.type = '"builddev"'
require('./build')

3、index.js修改

把build复制一份，修改相应的index、assetsRoot、assetsSubDirectory、assetsPublicPath

4、修改webpack.base.conf.js

 publicPath: process.env.NODE_ENV === 'production'
      ? (process.env.type == '"builddev"' ? config.builddev.assetsPublicPath : config.build.assetsPublicPath)
      : config.dev.assetsPublicPath

5、修改webpack.prod.conf.js

output: {
    path: process.env.type == '"builddev"' ? config.builddev.assetsRoot : config.build.assetsRoot
  },