node-resolve does not allow of external returning constant true

[StreetStrider]

• Rollup Plugin Name: plugin-node-resolve
• Rollup Plugin Version: 13.0.4 (multiple versions may be affected)
• Rollup Version: 2.54.0
• Operating System (or Browser): GNU/Linux
• Node Version: v14.17.0 (multiple versions affected)
• Link to reproduction (⚠️ read below): https://replit.com/@StrangeTransist/rollup-plugin-repro

Expected Behavior

No errors.

Actual Behavior

[!] Error: Entry module cannot be external (subdir/entry.js).

Additional Information

This happens only with plugin included.

[shellscape]

Why is it that you're marking every module as external? node-resolve will explicitly not resolve external modules as can be seen here:

plugins/packages/node-resolve/src/index.js

Lines 267 to 270 in 8748b8c

	const isExternal = !!(resolvedResolved && resolvedResolved.external);
	if (isExternal) {
	return false;
	}

and was intentional via 3a543df

[StreetStrider]

🤔 I think I should re-investigate this issue, so I'll close this in order to not to mess up anyone's mind more.
I was hunting for another issue under this one which re-writes import paths where I don't need them (so I may be experiencing something similar to #609). This is kinda reflected in the same repro. But now I'm not sure this is related to node-resolve.