build.tools.nix/mkClojureLib.nix

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

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

  classpath = clj-deps.makeClasspaths { };

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

  target = "$TEMP/target";

in stdenv.mkDerivation {
  name = name;

  src = src;

  nativeBuildInputs = [ clojure ];
  buildInputs = (map (x: x.paths) clj-deps.packages);

  buildPhase = let
    cmd = ''
      HOME=$TEMP/home
      BHOME=$TEMP/build-home
      mkdir -p $HOME
      mkdir -p ${target}
      mkdir -p $BHOME
      cp ${build-tools-deps} $BHOME/deps.edn

      clojure \
        -Scp     .:${build-tools-jar}:${classpath} \
        -Sdeps   $BHOME/deps.edn \
        -X:build \
        lib-uberjar \
        :project ${group}/${name} \
        :version ${version} \
        :srcs    ${concatStringsSep "," src-paths} \
        :target  ${target}
    '';
  in builtins.trace cmd cmd;

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