• Rollup Plugin Name: @rollup/plugin-commonjs
• Rollup Plugin Version: 22.0.0
• Rollup Version: 2.70.2
• Operating System (or Browser): Linux 64-bit NixOS
• Node Version: v16.14.0
• Link to reproduction (⚠️ read below): https://replit.com/@Pauan1/rollup-plugin-repro#rollup.config.js

Expected Behavior

The console should contain the following:

/home/runner/rollup-plugin-repro/input.js true

Actual Behavior

The console contains the following:

/home/runner/rollup-plugin-repro/input.js false
/home/runner/rollup-plugin-repro/input.js?commonjs-entry true

This means that the entry point is returning isEntry: false even though it should return isEntry: true

Additional Information

I noticed this bug while using the Rust Rollup plugin. With that plugin, you can import Cargo.toml files:

export default {
    input: {
        foo: "Cargo.toml",
    }
};

The Rust plugin requires isEntry in order to generate correct code.

However, even though those Cargo.toml files are not CommonJS (they're not even JS!) the commonjs plugin breaks them by causing isEntry to return false even though it should return true.