@sveltejs/kit/src/utils/import.js

SvelteKit is the fastest way to build Svelte apps

import * as imr from 'import-meta-resolve';
import process from 'node:process';
import { pathToFileURL } from 'node:url';

/**
 * Resolve a dependency relative to the current working directory,
 * rather than relative to this package (but falls back to trying that, if necessary)
 * @param {string} dependency
 */
export async function resolve_peer_dependency(dependency) {
	try {
		// @ts-expect-error the types are wrong
		const resolved = imr.resolve(dependency, pathToFileURL(process.cwd() + '/dummy.js'));
		return await import(resolved);
	} catch {
		try {
			// both imr.resolve and await import above can throw, which is why we can't just do import(resolved).catch(...) above
			return await import(dependency);
		} catch {
			throw new Error(
				`Could not resolve peer dependency "${dependency}" relative to your project — please install it and try again.`
			);
		}
	}
}