在javascript文件中为nodejs添加环境变量

我正在用NightWatch对Vue JS应用程序进行测试。因为我已经在gitlab ci/cd中集成了测试,所以我需要两种不同的夜视配置。

为了实现这一目标,我做了以下工作:

为本地测试和Gitlab测试创建两个不同的脚本

   "scripts" : {
    "e2e" :  "node test/e2e/gitlab_runner.js" ,
    "local-test" :  "node test/e2e/local_runner.js" ,
    "test": "npm run e2e"

然后我将需要的变量嵌入到 local_runner 和 gilab_runner 文件夹

process.env.NIGHTWATCH_CONFIG = 'nightwatch.local.js';
require('./runner.js');

对于 gitlab_runner

process.env.NIGHTWATCH_CONFIG = 'nightwatch.conf.js';
require('./runner.js');

然后在文件里 runner.js 我有以下代码行

  opts = opts.concat(['--config', 'test/e2e/' + NIGHTWATCH_CONFIG]);

这样我就能得到正确的文件。

问题是,当我运行脚本时,会出现以下错误:

(node:21061) UnhandledPromiseRejectionWarning: ReferenceError: NIGHTWATCH_CONFIG is not defined
    at devConfigPromise.then.then (xxxxxx/test/e2e/runner.js:30:51)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:182:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:697:11)
    at startup (internal/bootstrap/node.js:201:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:516:3)
(node:21061) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:21061) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

我还尝试在 本地跑步者 和 Gitlab_跑步者 文件夹:

  module.exports = {
    NIGHTWATCH_CONFIG = 'nightwatch.local.js';
  };

但后来 NIGHTWATCH_CONFIG 中的变量 跑步者.js 文件未定义。

我该怎么解决?