[Bug?]: cannot load yarn.config.js when package.json has type: module

[evan-thrive-health]

Self-service

• I'd be willing to implement a fix

Describe the bug

When package.json contains the directive "type": "module", yarn constraints fails with the following error message.

yarn.config.js is treated as an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which declares all .js files in that package scope as ES modules.
Instead rename yarn.config.js to end in .cjs, change the requiring code to use dynamic import() which is available in all CommonJS modules, or change "type": "module" to "type": "commonjs" in /Users/edickinson/Apps/constraint-repro/package.json to treat all .js files as CommonJS (using .mjs for all ES modules instead).

If I rename the file to yarn.config.cjs then the file isn't imported by yarn. And changing type to commonjs isn't viable for our project.

Additionally, converting yarn.config.js to use ES Modules (as in export async function constraints() {}) fails with the error Internal Error: require() of ES Module /Users/edickinson/Apps/constraint-repro/yarn.config.js from /Users/edickinson/Apps/constraint-repro/.yarn/releases/yarn-4.0.0-rc.50.cjs not supported.

There's a previous comment that proposes changing the config file to yarn.config.cjs, but maybe that work fell through the cracks? Seems like that would be a good resolution to the issue

To reproduce

package.json

{
  "name": "constraint-repro",
  "packageManager": "yarn@4.0.0-rc.50",
  "type": "module"
}

yarn.config.js

module.exports = {
    async constraints({Yarn}) {
      for (const dep of Yarn.dependencies({ ident: 'react' })) {
        dep.update(`18.0.0`);
      }
    },
  };

Environment

System:
    OS: macOS 13.5.1
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
  Binaries:
    Node: 18.16.1 - /private/var/folders/dn/r5w78tm5375c0sj8_wb3wmn80000gn/T/xfs-5fdca915/node
    Yarn: 4.0.0-rc.50 - /private/var/folders/dn/r5w78tm5375c0sj8_wb3wmn80000gn/T/xfs-5fdca915/yarn
    npm: 9.5.1 - /usr/local/bin/npm

Additional context

No response

[evan-thrive-health]

Closed by mistake because I mentioned this issue in a PR in my org's private repo

[evan-thrive-health]

Thanks for fixing this 😊, @arcanis