Heroku buildpack for Bun.js - allows you to run Bun on Heroku.
Largely copied from the Deno buildpack and Node.js buildpack.
To add the buildpack to your Heroku app, visit the settings page for your app on Heroku, then under 'Buildpacks' add the URL https://github.com/jakeg/heroku-buildpack-bun
.
You'll need a Procfile
in the root folder of your app, with eg web: bun index.js
in it.
Pin a certain Bun version with a runtime.bun.txt
or runtime.txt
with e.g. v1.0.7
in it.
This buildpack automatically runs the following bun commands and scripts if defined in package.json
.
bun install
)bun run heroku-prebuild
)bun run build
)bun run heroku-postbuild
)Bind to env.PORT
eg
import { env } from 'process'
const server = Bun.serve({
port: env.PORT || 3000,
fetch(request) {
return new Response(`Welcome to Bun running on Heroku!`)
},
})
console.log(`Listening on localhost:${server.port}`)
~Be aware that Heroku doesn't use a new enough version of the Linux kernel to support io_uring
, which is needed for Bun.write()
. Use node:fs.writeFile()
instead.~ - this seems now to be fixed.
Use the Issues tab to report any issues.