wepy框架开发小程序配置自动匹配正式环境，开发环境请求url

1. scr下面创建config文件夹 并创建dev.js prod.js index.js三个文件
   dev.js

     export default {
   	  url: '开发环境url'
   	}
   

   prod.js

   	export default {
   	  url: '正式环境url'
   	}
   
   

   index.js

   ```
   import devConf from './dev'
   import prodConf from './prod'
   import {merge} from 'lodash'
   
   let config = {} // 配置文件对象，它将会被devConf或prodConf替换
   
   let env = process.env.NODE_ENV // 当前的项目环境
   console.log('env=' + env)
   if (env === 'dev') {
     merge(config, devConf)
   } else if (env === 'production') {
     merge(config, prodConf)
   }
   
   export default config
   
   ```
   

2. wepy.config.js

   ```
   const path = require('path')
   var prod = process.env.NODE_ENV === 'production'
   
   module.exports = {
     wpyExt: '.wpy',
     eslint: true,
     cliLogs: !prod,
     build: {
       web: {
         htmlTemplate: path.join('src', 'index.template.html'),
         htmlOutput: path.join('web', 'index.html'),
         jsOutput: path.join('web', 'index.js')
       }
     },
     resolve: {
       alias: {
         counter: path.join(__dirname, 'src/components/counter'),
         '@': path.join(__dirname, 'src')
       },
       aliasFields: ['wepy', 'weapp'],
       modules: ['node_modules']
     },
     compilers: {
       less: {
         compress: prod
       },
       babel: {
         sourceMap: true,
         presets: [
           'env'
         ],
         plugins: [
           // **重点在这**
           'transform-class-properties',
           'transform-decorators-legacy',
           'transform-object-rest-spread',
           'transform-export-extensions',
           'transform-node-env-inline'
         ]
       }
     },
     appConfig: {
       noPromiseAPI: ['createSelectorQuery']
     }
   }
   
   if (prod) {
     module.exports.plugins = {
       uglifyjs: {
         filter: /\.js$/,
         config: {
         }
       },
       'imagemin': {
         filter: /\.(jpg|png|jpeg)$/,
         config: {
           'jpg': {
             quality: 80
           },
           'png': {
             quality: 80
           }
         }
       }
     }
   }
   
   ```
   

3.package.json

	```
	{
	  "name": "charge",
	  "version": "0.0.2",
	  "description": "A WePY project",
	  "main": "dist/app.js",
	  "scripts": {
	    "dev": "cross-env NODE_ENV=dev wepy build --watch",
	    "build": "cross-env NODE_ENV=production wepy build --no-cache",
	    "dev:web": "wepy build --output web",
	    "clean": "find ./dist -maxdepth 1 -not -name 'project.config.json' -not -name 'dist' | xargs rm -rf",
	    "test": "echo \"Error: no test specified\" && exit 1"
	  },
	  "wepy": {
	    "module-a": false,
	    "./src/components/list": "./src/components/wepy-list.wpy"
	  },
	  "author": "zhouyumei",
	  "license": "MIT",
	  "dependencies": {
	    "babel-plugin-transform-node-env-inline": "^0.4.3",
	    "less": "^3.9.0",
	    "redux": "^3.7.2",
	    "redux-actions": "^2.2.1",
	    "redux-promise": "^0.5.3",
	    "wepy": "^1.6.0",
	    "wepy-async-function": "^1.4.4",
	    "wepy-com-toast": "^1.0.2",
	    "wepy-redux": "^1.5.3"
	  },
	  "devDependencies": {
	    "across-env": "^1.0.8",
	    "babel-eslint": "^7.2.1",
	    "babel-plugin-global-define": "^1.0.3",
	    "babel-plugin-transform-class-properties": "^6.24.1",
	    "babel-plugin-transform-decorators-legacy": "^1.3.4",
	    "babel-plugin-transform-export-extensions": "^6.22.0",
	    "babel-plugin-transform-object-rest-spread": "^6.26.0",
	    "babel-preset-env": "^1.6.1",
	    "cross-env": "^5.1.3",
	    "eslint": "^3.18.0",
	    "eslint-config-standard": "^7.1.0",
	    "eslint-friendly-formatter": "^2.0.7",
	    "eslint-plugin-html": "^2.0.1",
	    "eslint-plugin-promise": "^3.5.0",
	    "eslint-plugin-standard": "^2.0.1",
	    "less": "^3.8.1",
	    "wepy-compiler-babel": "^1.5.3",
	    "wepy-compiler-less": "^1.3.12",
	    "wepy-eslint": "^1.5.3",
	    "wepy-plugin-imagemin": "^1.5.3",
	    "wepy-plugin-uglifyjs": "^1.3.7"
	  }
	}

4.开发环境执行 npm run dev 正式环境执行 npm run build

注意安装npm install babel-plugin-transform-node-env-inline --save反正运行报错缺啥安装啥(手动滑稽)

5. 使用 如有封装好的接口api文档里

//首先引入
import __CONFIG__ from '../config/index'
//取得url
const baseUrl=__CONFIG__ .url