Vite Plugin not respecting Vite env configuration

[andrew-canvette]

I'm using React Router as a...

library

Reproduction

https://stackblitz.com/edit/remix-run-remix-cyw8eahe?file=app%2Froutes%2F_index.tsx

1. Create directory ./env
2. Create ./env/.env
3. Add envDir: './env', to vite.config.ts

React router does not use envDir to look up the file. It also does not respect envFile false when specified by an inline config to disable loading .env files.

react-router/packages/react-router-dev/vite/plugin.ts

Line 749 in 18e0711

ctx.rootDirectory,

System Info

System:
    OS: Linux 6.9 Pop!_OS 22.04 LTS
    CPU: (32) x64 AMD Ryzen 9 7950X3D 16-Core Processor
    Memory: 42.12 GB / 61.94 GB
    Container: Yes
    Shell: 5.1.16 - /bin/bash
  Binaries:
    Node: 20.18.0 - ~/.nvm/versions/node/v20.18.0/bin/node
    npm: 10.8.2 - ~/.nvm/versions/node/v20.18.0/bin/npm
    pnpm: 10.0.0 - ~/.nvm/versions/node/v20.18.0/bin/pnpm
  Browsers:
    Chrome: 132.0.6834.110
  npmPackages:
    vite: 5.4.11 => 5.4.11

Used Package Manager

npm

Expected Behavior

The vite plugin should respect environment configurations supplied to vite.

envFile from https://vite.dev/guide/api-javascript.html#inlineconfig

envDir from https://github.com/vitejs/vite/blob/f2c07dbfc874b46f6e09bb04996d0514663e4544/packages/vite/src/node/config.ts#L411

Actual Behavior

The plugin loads from the root no matter what, ignoring envFile and envDir