访问从angular-cli创建的environment.ts文件中的process.env [英] Access process.env in environment.ts file created from the angular-cli

问题描述

我有一个angular-cli应用程序(Angular版本4.0.0).我希望能够访问从cli创建的environment.ts文件中的环境变量.

I have an angular-cli application (angular version 4.0.0). I want to be able to access my environment variables in the environment.ts file created from the cli.

示例:

export SOME_VARIABLE=exampleValue

构建我的角度应用程序时，我希望在SOME_VARIABLE字段中填充"exampleValue".

When I build my angular app I want "exampleValue" to be populated in the SOME_VARIABLE field.

// environment.ts

export const environment = {
    production: false,
    SOME_VARIABLE: process.env.SOME_VARIABLE
};

很遗憾，此文件中没有process.env.我如何获得它?

Unfortunately, process.env isn't available in this file. How can I gain access to it?

推荐答案

一种解决方法是创建一个节点脚本，该脚本替换占位符.

One way to solve this is to create a node script, which replaces a place holder.

这可以通过npm中的替换在文件中完成.

This can be done with replace-in-file from npm.

解决方案如下:

npm install replace-in-file --save-dev

npm install replace-in-file --save-dev

创建占位符

Create a place holder

export const environment = {
  production: true,
  version: '{BUILD_VERSION}'
}

创建节点脚本以替换占位符(根文件夹中的replace.build.js)

Create node script to replace the place holder (replace.build.js in root folder)

var replace = require('replace-in-file');
var buildVersion = process.env.BUILD_NUMBER;
const options = {
  files: 'environments/environment.ts',
  from: /{BUILD_VERSION}/g,
  to: buildVersion,
  allowEmptyPaths: false,
};

try {
  let changedFiles = replace.sync(options);
  console.log('Build version set: ' + buildVersion);
}
catch (error) {
  console.error('Error occurred:', error);
}

在构建过程中执行此节点脚本大口大口

Execute this node script in your build process f.e. in gulp

gulp.task('updateVersion', function (done) {
  exec('node ./replace.build.js', function (err, stdout, stderr) {
    console.log(stdout);
    console.log(stderr);
    done();
  });
});

现在您可以在应用程序中使用environment.version.

Now you can use environment.version in your app.

这篇关于访问从angular-cli创建的environment.ts文件中的process.env的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！