A toy web server written in Scala using http4s

The point of this project is to demonstrate how scala-cli and nix flakes can be leveraged to build and distribute Scala apps in 4 different ways:

• as a standalone jar running on the JVM;
• as a native executable compiled by Scala Native;
• as a GraalVM native image;
• as a Node.js app compiled by Scala.js.

If you have nix installed and flakes enabled:

nix run github:buntec/minimal-scala-native-http4s-server-app#jvm --refresh

nix run github:buntec/minimal-scala-native-http4s-server-app#native --refresh

nix run github:buntec/minimal-scala-native-http4s-server-app#graal --refresh

nix run github:buntec/minimal-scala-native-http4s-server-app#node --refresh

Note that running any of the above will be slow the first time only - after the initial build everything is cached in your nix store.

If you want the actual binary, simply replace run by build.

This flake also contains a dev shell suitable for working on the app:

nix develop github:buntec/minimal-scala-native-http4s-server-app --refresh

Notes

The --refresh flag above ensures that you always get the most recent commit.