Nested static routes are failing to render or redirect

[JessicaSachs]

Describe the bug

Nested static routes are no longer rendering or redirecting properly

• Previously, navigating to /subdir/index.html would render that page and then import the proper files.
• Currently, navigating to static routes like /subdir/index.html attempt to redirect to /index.html

If this is now the desired behavior, it is also failing to execute the redirect properly.

1. When the user navigates to /subdir/index.html, the page served is /index.html
2. The relative imports in /index.html are executed relative to the originally requested file... e.g. /subdir/main.js is requested instead of /main.js

Reproduction

https://github.com/JessicaSachs/vite-component-test-starter/tree/repro/vite-0.15.3

npm i
npm run dev
open http://localhost:3000/test/index.html

System Info

• required vite version: 0.15.3
• required Operating System: OSX
• required Node version: v12.16.1

Logs (Optional if provided reproduction)

vite v0.15.3
  vite:resolve (node_module entry) vue -> vue/dist/vue.runtime.esm-bundler.js +0ms
[vite] Optimizable dependencies detected.
Pre-bundling them to speed up dev server page load...
  (this will be run only when your dependencies have changed)
Optimized modules:
vue

  Dev server running at:
  > Local:    http://localhost:3000/
  > Network:  http://172.16.10.52:3000/

  vite:server server ready in 874ms. +0ms
redirecting / to /index.html
  vite:hmr         /index.html imports /main.js +0ms
  vite:rewrite /index.html: no imports found. +0ms
not redirecting /main.js (has file extension)
  vite:rewrite /main.js: rewriting +167ms
  vite:rewrite     "vue" --> "/@modules/vue" +0ms
  vite:hmr         /main.js imports /@modules/vue +168ms
  vite:rewrite     "./App.vue" --> "/App.vue" +1ms
  vite:hmr         /main.js imports /App.vue +1ms
  vite:hmr ws client connected +445ms
  vite:resolve (optimized) vue -> node_modules/.vite_opt_cache/vue.js +0ms
  vite:sfc /Users/jess/projects/vite-component-test-starter/App.vue parsed in 5ms. +0ms
  vite:rewrite /App.vue: rewriting +454ms
  vite:rewrite     "vite/hmr" --> "/vite/hmr" +0ms
  vite:rewrite /@modules/vue: no imports found. +5ms
  vite:sfc /Users/jess/projects/vite-component-test-starter/App.vue parse cache hit +7ms
  vite:sfc /App.vue template compiled in 15ms. +15ms
  vite:rewrite (skipped) /App.vue?type=template +16ms
  vite:sfc /Users/jess/projects/vite-component-test-starter/App.vue parse cache hit +5ms
  vite:sfc /App.vue style compiled in 59ms +59ms
  vite:rewrite (skipped) /App.vue?type=style&index=0 +65ms
redirecting /test/index.html to /index.html
  vite:rewrite /index.html: serving from cache +5s
not redirecting /test/main.js (has file extension)
  vite:rewrite (skipped) /test/main.js +20ms
  vite:hmr ws client connected +5s

[JessicaSachs]

Nice. Just verified this works in the latest (0.15.5) and upgraded Vite Component Test Starter to use it