`require 'shakapacker'` creates output directory as a side effect

[alexeyr-ci2]

Expected behavior:

require 'shakapacker' shouldn't have side effects.

Actual behavior:

It creates public/webpack/{test,development,production} depending on NODE_ENV.

require('shakapacker') eagerly loads environments/base.js, which calls getPlugins() at module load time, which calls ensureManifestExists(), which calls mkdirSync(public/webpack/test).

Small, reproducible repo:

Setup environment:

• Ruby version: 3.3.7
• Rails version: 8.0.4.1
• Shakapacker version: 10.0.0