vite-plugin-vue2 ignores Vite base option

This repository contains a minimal reproduction of the issue using both Vue 2 and Vue 3.

The issue

The vite-plugin-vue2 plugin for Vite ignores Vite base URL option, while @vitejs/plugin-vue does.

Example app

You use Vite base setting to indicate a base URL (e.g. your app is deployed under /my-spa/) and expect the plugin to prepend the base path to any public path encountered in a Vue <template>.

For example, with the following directory structure:

├── dist (build)
├── public (default Vite `publicDir`, copied as is in `outDir`)
│   │── images
│   │   └── some-pic.png
├── src
│   ├── App.vue
│   └── index.js
└── index.html

and with App.vue:

<template>
    <img src="/images/some-pic.png">
</template>

Expectations

src="/images/some-pic.png" should become src="/my-spa/images/some-pic.png".

Current results

Once compiled, it stays src="/images/some-pic.png":

{src:"/images/some-pic.png",alt:""}

On the other side, the Vue 3 plugin for Vite compiles it fine:

var u="/vue-3-demo/images/some-pic.png"

This can also be verified in the browser live by running npm run serve in /vue-2 or /vue-3.

Vite config

Vue 2

import { defineConfig } from 'vite'
import { createVuePlugin } from 'vite-plugin-vue2'

export default defineConfig({
  base: '/vue-2-demo/',
  build: {
    outDir: `./dist/vue-2-demo`,
    emptyOutDir: true,
  },

  plugins: [createVuePlugin()],
})

Vue 3

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

export default defineConfig({
  base: '/vue-3-demo/',
  build: {
    outDir: `./dist/vue-3-demo`,
    emptyOutDir: true,
  },

  plugins: [vue()],
})