Allow root and outDir to be the same, if it's not the source file directory.

[madsem]

Description

I'm seeing this warning:

(!) build.outDir must not be the same directory of root or a parent directory of root as this could cause Vite to overwriting source files with build outputs.

With a vite config like this:

import { defineConfig } from 'vite';
import vue from '@vitejs/plugin-vue';
import path from 'path';
import vueDevTools from 'vite-plugin-vue-devtools';

export default defineConfig({
  root: path.resolve(__dirname, 'dist'),
  plugins: [vue(), vueDevTools()],
  build: {
    outDir: path.resolve(__dirname, 'dist'),
    emptyOutDir: true,
    rollupOptions: {
      input: {
        main: path.resolve(__dirname, 'dist/index.html'),
      },
    },
  },
  server: {
    open: true,
  },
});

The dist directory is dynamically built by a nodejs script, that copies files from different locations into the dist directory, to end up with a fully configured VueJS app. (Monorepo style)

Suggested solution

Maybe an additional config flag could be used to allow monorepo setups?
Or an option to suppress this warning?

I am unsure if my use case is common enough to even warrant this. If not please feel free to close :)

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[bluwy]

I think usecases like this is indeed rare and I think it's still useful to keep the warning in place. It can be dangerous too when having both the same value, especially in conjunction to emptyOutDir: true as you may be deleting your entire source code during build. I'll close this for now and a workaround if you need a different behaviour is probably fine for now.