metals: init at 0.7.6

pkgs/development/tools/metals/default.nix

@@ -0,0 +1,57 @@
+{ stdenv, lib, coursier, jdk, jre, makeWrapper }:
+
+let
+  baseName = "metals";
+  version = "0.7.6";
+  deps = stdenv.mkDerivation {
+    name = "${baseName}-deps-${version}";
+    buildCommand = ''
+      export COURSIER_CACHE=$(pwd)
+      ${coursier}/bin/coursier fetch org.scalameta:metals_2.12:${version} \
+        -r bintray:scalacenter/releases \
+        -r sonatype:snapshots > deps
+      mkdir -p $out/share/java
+      cp -n $(< deps) $out/share/java/
+    '';
+    outputHashMode = "recursive";
+    outputHashAlgo = "sha256";
+    outputHash     = "03vx8n77mndpqbvq14cy3k9r4jwgjacrv56v5n87da8rqiclx37j";
+  };
+in
+stdenv.mkDerivation rec {
+  name = "${baseName}-${version}";
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ jdk deps ];
+
+  phases = [ "installPhase" ];
+
+  extraJavaOpts = "-XX:+UseG1GC -XX:+UseStringDeduplication -Xss4m -Xms100m";
+
+  installPhase = ''
+    mkdir -p $out/bin
+
+    makeWrapper ${jre}/bin/java $out/bin/metals-emacs \
+      --prefix PATH : ${lib.makeBinPath [ jdk ]} \
+      --add-flags "${extraJavaOpts} -Dmetals.client=emacs -cp $CLASSPATH scala.meta.metals.Main"
+
+    makeWrapper ${jre}/bin/java $out/bin/metals-vim \
+      --prefix PATH : ${lib.makeBinPath [ jdk ]} \
+      --add-flags "${extraJavaOpts} -Dmetals.client=coc.nvim -cp $CLASSPATH scala.meta.metals.Main"
+
+    makeWrapper ${jre}/bin/java $out/bin/metals-vim-lsc \
+      --prefix PATH : ${lib.makeBinPath [ jdk ]} \
+      --add-flags "${extraJavaOpts} -Dmetals.client=vim-lsc -cp $CLASSPATH scala.meta.metals.Main"
+
+    makeWrapper ${jre}/bin/java $out/bin/metals-sublime \
+      --prefix PATH : ${lib.makeBinPath [ jdk ]} \
+      --add-flags "${extraJavaOpts} -Dmetals.client=sublime -cp $CLASSPATH scala.meta.metals.Main"
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = https://scalameta.org/metals/;
+    license = licenses.asl20;
+    description = "Work-in-progress language server for Scala";
+    maintainers = with maintainers; [ ceedubs tomahna ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -8401,6 +8401,7 @@ in
   scala_2_13 = callPackage ../development/compilers/scala/2.13.nix { jre = jre8; };
   scala = scala_2_13;
 
+  metals = callPackage ../development/tools/metals { };
   scalafix = callPackage ../development/tools/scalafix { };
   scalafmt = callPackage ../development/tools/scalafmt { };