How to specify build-time configuration variables

[jrr]

The Environment Variables doc describes how env vars are meant for runtime, and contrasts this with "build arguments".

I'm totally onboard with this, but as far as I can tell "build arguments" aren't a thing in remix. Is there a way I can define a variable to be consumed at build time? I'm looking for something analogous to REACT_APP_ variables, whether expressed via env vars or via some other mechanism.

[gustavopch]

If you're using Vite, you can inject env vars as described here: https://vitejs.dev/guide/env-and-mode

[jrr]

That looks great! Unfortunately not using Vite yet, so I need a solution that works with the old compiler. (though I look forward to migrating to the Vite solution when I can!)

[gustavopch]

I believe you'll need to write a script to go through the build files and replace each variable with the value you want. Or... just get the values from your server. I was convinced by Ryan that that's the way to go.

[sergiodxa]

@jrr old compiler there's no way, but you could add a prebuild script that generates a file with your configuration variables and then import in, so when you run remix build it will already have imported the file with the correct values

[jrr]

Yeah, that's what I wound up doing, adding a code generator step and a turbo dependency. It's just a bummer that I can only have one version on the filesystem at a time, whereas I could e.g. have FOO=BAR remix dev and FOO=BAZ remix dev running simultaneously if it worked like env vars.