Astro ignores vite.envPrefix only during production build

[JLarky]

What version of astro are you using?

1.9.1

Are you using an SSR adapter? If so, which one?

None

What package manager are you using?

npm

What operating system are you using?

Mac

Describe the Bug

change your configuration to add vite.envPrefix:

export default defineConfig({vite: {
    envPrefix: 'VITE_',
}});

For both scripts PUBLIC_P=1 VITE_P=2 was set in environment, both those values are accessible during SSR, but only one of them is going to be ignored on client (depending on the way you run it).

Running npm run dev:

Running npm run build && npm run preview:

My explanation is that it seems like Astro is ignoring astro.vite configuration during builds, but uses it during dev

Link to Minimal Reproducible Example

https://github.com/JLarky/astro-env-prefix-bug

Participation

• I am willing to submit a pull request for this issue.

[matthewp]

Thanks!