nixpkgs-fmt

packages/jdtls/default.nix

@@ -0,0 +1,36 @@
+{ stdenv, pkgs, ... }:
+
+stdenv.mkDerivation rec {
+  pname = "jdtls";
+  version = "0.50.0";
+  src = pkgs.fetchurl {
+    url = "http://download.eclipse.org/${pname}/milestones/${version}/jdt-language-server-${version}-202002171858.tar.gz";
+    sha256 = "bf72084dc7988f76e01668d778c826c7490c287ee96a9f82e9e11afb6b722ab7";
+  };
+  sourceRoot = ".";
+  buildPhase = "true";
+  installPhase = ''
+    mkdir -p $out/share/java/jdtls
+    mv config_* features plugins $out/share/java/jdtls
+    mkdir $out/bin
+    cat >$out/bin/jdtls <<HERE
+    #!${pkgs.bash}/bin/bash
+
+    tmp_dir=\$(mktemp -d /tmp/jdtls.XXXXX)
+    cp -R $out/share/java/jdtls/config_linux \$tmp_dir
+    chmod -R u=rwX \$tmp_dir
+    trap "{ rm -rf \$tmp_dir; }" 0
+
+    ${pkgs.jdk11}/bin/java \
+      -Declipse.application=org.eclipse.jdt.ls.core.id1 \
+      -Dosgi.bundles.defaultStartLevel=4 \
+      -Declipse.product=org.eclipse.jdt.ls.core.product \
+      -noverify \
+      -Xms1G \
+      -jar $out/share/java/jdtls/plugins/org.eclipse.equinox.launcher_*.jar \
+      -configuration "\$tmp_dir/config_linux" \
+      "\$@"
+    HERE
+    chmod +x $out/bin/jdtls
+  '';
+}