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{ stdenv, lib, coursier, jre, makeWrapper, setJavaClassPath }:
stdenv.mkDerivation rec {
pname = "metals";
version = "1.2.2";
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 $(< deps) $out/share/java/
'';
outputHashMode = "recursive";
outputHashAlgo = "sha256";
outputHash = "sha256-xk2ionn/lBV8AR7n7OR03UuRCoP1/K6KuohhpRwFock=";
};
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 = "Language server for Scala";
mainProgram = "metals";
maintainers = with maintainers; [ fabianhjr tomahna ];
};
}
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