Bleep-flake

A flake for the Scala build tool Bleep.

About

A flake for Bleep. A bleeping fast scala build tool!

Bleep is a modern take on a build tool for Scala. Read all about bleep.

However as it is quite new it is not packaged for nixpkgs. Running GraalVM native-image that does not static link to glibc does not work well on nix and needs to be patched. This flake uses autoPatchelfHook to patch it for Nix on Linux.

Most of the code in this flake is taken from the scala-cli nixpkg

Only tested to work on nixOS and i have not tested if bash-completions are installed properly yet as I don't use bash...

Current limitations

There are a couple of limitations because Nix and Bleep try to solve the same issue.

• Bleep can not manage it's own versions using this flake, see bug.
• Bleep can not manage JDKs with this flake for the same reason as above. Define the JDK in your flake for now.

These are really non-issues when you are using Nix, but it does mean that you can't build bleep with bleep as bleep requires the JDK version to be defined in the bleep.yml.

Adding it to your flake

It's as simple as adding this flake as an inputs and defining bleep in the outputs. Example:

{
  description = "bleep";

  inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs";
     bleepSrc.url = "github:KristianAN/bleep-flake"; # The bleep flake
     flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, bleepSrc, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let pkgs = import nixpkgs { inherit system; };
          bleep = bleepSrc.defaultPackage.${system}; # Your bleep system binary

          jdk = pkgs.jdk17_headless;

          jvmHook = ''
            JAVA_HOME="${jdk}"
          '';
      in {
        devShell = pkgs.mkShell rec {
          buildInputs = [
            bleep # Bleep bleep
            jdk
          ];
          shellHook = jvmHook;          
        };
      });
}

If you don't want to add this as a input in your flake you can look at the bleep.nix.example file. Create a nix file in your directory, copy the contents into it, then import the file into your build.

Importing from sbt

If you want to import from sbt you will need to edit your flake.nix so that sbt has the required tools in scope by overriding the postFixup attribute

 sbt = pkgs.sbt.overrideAttrs (oldAttrs: {
    nativeBuildInputs = oldAttrs.nativeBuildInputs or [] ++ [ pkgs.makeWrapper ];
    postFixup = ''
      wrapProgram $out/bin/sbt --prefix PATH : "${pkgs.coreutils}/bin:${pkgs.gnugrep}/bin:${pkgs.gnused}/bin"
    '';
  });

Now you can run bleep import --sbt-path sbt