如何在Ember项目中读取VERSION文件内容到environment.js？

Hey there! I get where you're coming from—your Node.js approach makes total sense, but the issue with your jQuery attempt is a classic "wrong environment" problem. Let's fix this step by step.

Why your current approach fails #

The $.getJSON call throws an error because environment.js runs during the build process in a Node.js context, not in the browser. jQuery isn't available here (it's a browser-side library), so $ is undefined—hence the "unexpected identifier" error.

The correct way (using Node.js modules, just like your intuition) #

Since Ember CLI is built on Node.js, you can directly use Node's core fs and path modules in environment.js—just like you would in a regular Node script. Here's how to do it properly:

1. First, import the required Node modules at the top of client/config/environment.js:

const fs = require('fs');
const path = require('path');

2. Then, in your ENV object, add the version using fs.readFileSync, with a safe path constructed via path.join (to avoid cross-OS path separator issues):

module.exports = function(environment) {
  const ENV = {
    // ... other environment variables ...
    version: fs.readFileSync(path.join(__dirname, '../../VERSION'), 'utf8').trim()
  };

  // ... other environment-specific config ...

  return ENV;
};

Key notes: #

• path.join(__dirname, '../../VERSION') ensures the path to your root-level VERSION file is correct, no matter what OS you're working on.
• The 'utf8' argument tells readFileSync to return a string instead of a buffer, so you don't need to call .toString() explicitly (though it still works if you do).
• .trim() removes any extra newlines or whitespace from the VERSION file content—super useful if the file has a trailing newline.
• Remember: this reads the VERSION file at build time. If you update the VERSION file later, you'll need to restart your Ember dev server or run a new build to pick up the change.

That's it! This should work exactly like your Node.js approach, but tailored to Ember's build process.

内容的提问来源于stack exchange，提问作者Will Daniels