Inject global

Somehow we want to require koa-cola project files but without running the project, if the file contain global refer which base on run-time like app.xxx, this will thow a exception, in this particular situation we need use reqInject to inject global.app.

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import { reqInject } from 'koa-cola'
let user;
reqInject(function(){
    // after injection, we can require any files inside project.
    user = require('./api/models/user').default 
    // or get the global variable directly
    let config = app.config;
});