fix dynamic import on windows, fix js/ts file ending, handle index.js…

…on.js endpoint case

packages/migrate/migrations/routes/index.js

@@ -5,6 +5,7 @@ import glob from 'tiny-glob/sync.js';
 import prompts from 'prompts';
 import ts from 'typescript';
 import MagicString from 'magic-string';
+import { pathToFileURL } from 'url';
 
 /** @param {string} message */
 function bail(message) {
@@ -38,7 +39,7 @@ export async function migrate() {
  bail('Please re-run this script in a directory with a svelte.config.js');
  }
 
- const { default: config } = await import(path.resolve('svelte.config.js'));
+ const { default: config } = await import(pathToFileURL(path.resolve('svelte.config.js')).href);
 
  const routes = path.resolve(config.kit?.files?.routes ?? 'src/routes');
 
@@ -78,7 +79,8 @@ export async function migrate() {
  const response = await prompts({
  type: 'confirm',
  name: 'value',
- message: 'This will overwrite files in the current directory. Continue?',
+ message:
+ 'This will overwrite files in the current directory. We advise you to use Git and commit any pending changes. Continue?',
  initial: false
  });
 
@@ -162,7 +164,7 @@ export async function migrate() {
 
  // if component has a <script context="module">, move it to a sibling .js file
  if (module) {
- const ext = /<script[^>]+lang=['"](ts|typescript)['"][^]*>/.test(module) ? '.js' : '.ts';
+ const ext = /<script[^>]+lang=['"](ts|typescript)['"][^]*>/.test(module) ? '.ts' : '.js';
  const injected = /load/.test(module)
  ? `${error('Update load function', '3292693')}\n\n`
  : '';
@@ -188,9 +190,19 @@ export async function migrate() {
  const type = is_page_endpoint ? '+page.server' : '+server';
 
  const move_to_directory = name !== 'index';
- const renamed =
- file.slice(0, -basename.length) +
- (move_to_directory ? `${name}/${type}${module_ext}` : `${type}${module_ext}`);
+
+ let renamed = '';
+ if (!is_page_endpoint && name.startsWith('index.')) {
+ // handle <folder>/index.json.js -> <folder>.json/+server.js
+ const dir = path.dirname(file);
+ renamed =
+ // prettier-ignore
+ `${file.slice(0, -(basename.length + dir.length + 1))}${dir + name.slice('index'.length)}/+server${module_ext}`;
+ } else if (move_to_directory) {
+ renamed = `${file.slice(0, -basename.length)}${name}/${type}${module_ext}`;
+ } else {
+ renamed = `${file.slice(0, -basename.length)}${type}${module_ext}`;
+ }
 
  const injected = error(`Update ${type}.js`, is_page_endpoint ? '3292699' : '3292701');
  const edited = `${injected}\n\n${move_to_directory ? adjust_imports(content) : content}`;