[Feature Request] Set os environment variable during dev

When running miniflare from cli (or perhaps through node api) set a process.env.MINIFLARE = true header.

Why?

When using build tools like esbuild or like id like to run slightly different code during my local dev time, than the worker running on the real platform.

Currently im env MINIFLARE=1 miniflare — but be awesome to have this first-class.

[mrbbot]

Hey! 👋 This definitely sounds useful for build scripts. Wondering if it’s also worth setting a MINIFLARE global to true in the actual worker context too… 🤔

[mrbbot]

Hey! 👋 Depends on where you’re using it. If it’s in your actual worker code…

if (globalThis.MINIFLARE) {
  // Do something when running in Miniflare
} else {
  // Do something when running in production
}

Note the globalThis. to avoid the ReferenceError.

If it’s in a custom Node.js build script, say build.js…

if(process.env.MINIFLARE) {
  // Do something when building for Miniflare
} else {
  // Do something when building for production
}