{ stdenv, lib, coursier, jre, makeWrapper, setJavaClassPath }: stdenv.mkDerivation rec { pname = "metals"; version = "0.11.8"; deps = stdenv.mkDerivation { name = "${pname}-deps-${version}"; buildCommand = '' export COURSIER_CACHE=$(pwd) ${coursier}/bin/cs fetch org.scalameta:metals_2.13:${version} \ -r bintray:scalacenter/releases \ -r sonatype:snapshots > deps mkdir -p $out/share/java cp -n $(< deps) $out/share/java/ ''; outputHashMode = "recursive"; outputHashAlgo = "sha256"; outputHash = "sha256-j7je+ZBTIkRfOPpUWbwz4JR06KprMn8sZXONrtI/n8s="; }; nativeBuildInputs = [ makeWrapper setJavaClassPath ]; buildInputs = [ deps ]; dontUnpack = true; extraJavaOpts = "-XX:+UseG1GC -XX:+UseStringDeduplication -Xss4m -Xms100m"; installPhase = '' mkdir -p $out/bin makeWrapper ${jre}/bin/java $out/bin/metals \ --add-flags "${extraJavaOpts} -cp $CLASSPATH scala.meta.metals.Main" ''; meta = with lib; { homepage = "https://scalameta.org/metals/"; license = licenses.asl20; description = "Work-in-progress language server for Scala"; maintainers = with maintainers; [ fabianhjr tomahna ]; }; }