index.js

'use strict';

const _ = require("lodash");

class ExportEnvWsgi {
  constructor(serverless, options) {
    this.serverless = serverless;
    this.hooks = {
      "before:wsgi:serve:serve": this.initEnv.bind(this)
    };
  }

  initEnv() {
    const AWS = this.serverless.providers.aws;

    return AWS.request("CloudFormation", "describeStacks", {
        StackName: AWS.naming.getStackName()
      })
      .then((response) => {
        const stack = response.Stacks[0];

        _.each(this.serverless.service.provider.environment, (value, key) => {
          const output = _.find(stack.Outputs, {
            'OutputKey': key
          });
          if (output) {
            this.serverless.service.provider.environment[output.OutputKey] = output.OutputValue;
          }
        });

        _.each(this.serverless.service.functions, (func, func_key) => {
          _.each(func.environment, (func_env_value, func_env_key) => {
            const output = _.find(stack.Outputs, {
              'OutputKey': func_env_key
            });
            if (output) {
              func.environment[output.OutputKey] = output.OutputValue;
            }
          });
        });
      });
  }
}

module.exports = ExportEnvWsgi;