build.tools.nix/mkClojureLib.nix

{ lib, stdenv, callPackage, jre, clojure, build-tools-jar, writeScript
, writeText }:
{ src, name, group, version, clj-deps, src-paths }:

with lib;
let
  build-tools-deps = writeText "deps.edn" ''
    { :aliases
      { :build
        { :ns-default build
          :replace-deps {
            io.github.clojure/tools.build {
              :local/root "${build-tools-jar}"
            }
          }
        }
      }
    }
  '';

  deps = callPackage clj-deps { };
  classpath = deps.makeClasspaths { };

  uberjar-script = writeScript "uberjar-builder.rb" ''
    ${ruby}/bin/ruby
    ${readFile ./resources/uberjar-builder.rb}
  '';

  full-name = "${group}-${name}-${version}-standalone.jar";

  target = "$TEMP/target";

in stdenv.mkDerivation {
  name = name;

  src = src;

  nativeBuildInputs = [ jre ];
  buildInputs = [ build-tools-jar ] ++ (map (x: x.paths) deps.packages);

  buildPhase = ''
    HOME=$TEMP/home
    mkdir -p $HOME
    mkdir -p ${target}

    clojure \
      -Scp     ${classpath} \
      -Sdeps   ${build-tools-deps} \
      -T:build \
      lib-uberjar \
      :project ${group}/${name} \
      :version ${version}" \
      :srcs    ${concatStringsSep "," src-paths}" \
      :target  ${target}
  '';

  installPhase = ''
    mv ${target}/${name}-${version}-standalone.jar $out
  '';
}