Can we un-deprecate build.upload.format and/or --format?

[huw]

I’m using Remix with their Workers integration. This uses the service worker syntax, pending remix-run/remix#764 (which might merge soon!).

When Remix builds in production mode, Wrangler correctly infers it as a service worker. When it builds in development mode (NODE_ENV=development remix build), it’s inferred as an ES Module, which breaks. I know that it should work, because if I edit cli.js locally to always spit out service-worker, it’s fine. So I would like to be able to override the inference when I know what works (and, tbh, to prevent wrangler taking any more time to startup—running an esbuild call can get slow, especially if we’ve already run a build). For now, I’ve had to remove NODE_ENV=development, which overoptimises the build & slows down my dev loop.