chore: better error message when import within/from package fails (#1386)

hopefully makes debugging cases easier

Author: dummdidumm

packages/repl/src/lib/workers/bundler/index.ts

@@ -215,7 +215,7 @@ async function get_bundle(
 					const { name, version } = current.meta;
 					const path = new URL(importee, importer).href.replace(`${NPM}/${name}@${version}/`, '');
 
-					return normalize_path(current, path);
+					return normalize_path(current, path, importee, importer);
 				}
 
 				return new URL(importee, importer).href;
@@ -225,7 +225,7 @@ async function get_bundle(
 			if (importee[0] === '#') {
 				if (current) {
 					const subpath = resolve_subpath(current, importee);
-					return normalize_path(current, subpath.slice(2));
+					return normalize_path(current, subpath.slice(2), importee, importer);
 				}
 				return await resolve_local(importee);
 			}
@@ -266,7 +266,7 @@ async function get_bundle(
 			const pkg = await fetch_package(pkg_name, pkg_name === 'svelte' ? svelte_version : v);
 			const subpath = resolve_subpath(pkg, '.' + (match[3] ?? ''));
 
-			return normalize_path(pkg, subpath.slice(2));
+			return normalize_path(pkg, subpath.slice(2), importee, importer);
 		},
 		async load(resolved) {
 			if (uid !== current_id) throw ABORT;

packages/repl/src/lib/workers/npm.ts

@@ -195,7 +195,7 @@ export function resolve_subpath(pkg: Package, subpath: string): string {
 	return subpath;
 }
 
-export function normalize_path(pkg: Package, path: string) {
+export function normalize_path(pkg: Package, path: string, importee: string, importer: string) {
 	for (const suffix of ['', '.js', '.mjs', '.cjs', '/index.js', '/index.mjs', '/index.cjs']) {
 		let with_suffix = path + suffix;
 
@@ -210,7 +210,9 @@ export function normalize_path(pkg: Package, path: string) {
 		}
 	}
 
-	throw new Error(`Could not find ${path} in ${pkg.meta.name}@${pkg.meta.version}`);
+	throw new Error(
+		`Could not find ${path} in ${pkg.meta.name}@${pkg.meta.version} (error occurred while trying to resolve ${importee} within ${importer})`
+	);
 }
 
 const LOCAL_PKG_URL = `${location.origin}/svelte/package.json`;