Function create_function_bundle

packages/adapter-vercel/index.js:633–746

* @param {import('@sveltejs/kit').Builder} builder * @param {string} entry * @param {string} dir * @param {import('./index.js').ServerlessConfig} config

(builder, entry, dir, config)

 * @param {import('./index.js').ServerlessConfig} config
 */
async function create_function_bundle(builder, entry, dir, config) {
	fs.rmSync(dir, { force: true, recursive: true });

	let base = entry;
	while (base !== (base = path.dirname(base)));

	const traced = await nodeFileTrace([entry], { base });

	/** @type {Map<string, string[]>} */
	const resolution_failures = new Map();

	traced.warnings.forEach((error) => {
		// pending https://github.com/vercel/nft/issues/284
		if (error.message.startsWith('Failed to resolve dependency node:')) return;

		// parse errors are likely not js and can safely be ignored,
		// such as this html file in "main" meant for nw instead of node:
		// https://github.com/vercel/nft/issues/311
		if (error.message.startsWith('Failed to parse')) return;

		if (error.message.startsWith('Failed to resolve dependency')) {
			const match = /Cannot find module '(.+?)' loaded from (.+)/;
			const [, module, importer] = match.exec(error.message) ?? [, error.message, '(unknown)'];

			if (!resolution_failures.has(importer)) {
				resolution_failures.set(importer, []);
			}

			/** @type {string[]} */ (resolution_failures.get(importer)).push(module);
		} else {
			throw error;
		}
	});

	if (resolution_failures.size > 0) {
		const cwd = process.cwd();
		builder.log.warn(
			'Warning: The following modules failed to locate dependencies that may (or may not) be required for your app to work:'
		);

		for (const [importer, modules] of resolution_failures) {
			console.error(`  ${path.relative(cwd, importer)}`);
			for (const module of modules) {
				console.error(`    - \u001B[1m\u001B[36m${module}\u001B[39m\u001B[22m`);
			}
		}
	}

	const files = Array.from(traced.fileList);

	// find common ancestor directory
	/** @type {string[]} */
	let common_parts = files[0]?.split(path.sep) ?? [];

	for (let i = 1; i < files.length; i += 1) {
		const file = files[i];
		const parts = file.split(path.sep);