1 files changed, 96 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/tools/java/java-language-server/default.nix b/nixpkgs/pkgs/development/tools/java/java-language-server/default.nix
new file mode 100644
index 000000000000..47054564f9b7
--- /dev/null
+++ b/nixpkgs/pkgs/development/tools/java/java-language-server/default.nix
@@ -0,0 +1,96 @@
+{ lib, stdenv, fetchFromGitHub
+, jdk, maven
+, runtimeShell, makeWrapper
+}:
+
+let
+  platform =
+    if stdenv.isLinux then "linux"
+    else if stdenv.isDarwin then "mac"
+    else if stdenv.isWindows then "windows"
+    else throw "unsupported platform";
+in
+stdenv.mkDerivation rec {
+  pname = "java-language-server";
+  version = "0.2.38";
+
+  src = fetchFromGitHub {
+    owner = "georgewfraser";
+    repo = pname;
+    # commit hash is used as owner sometimes forgets to set tags. See https://github.com/georgewfraser/java-language-server/issues/104
+    rev = "1dfdc54d1f1e57646a0ec9c0b3f4a4f094bd9f17";
+    sha256 = "sha256-zkbl/SLg09XK2ZhJNzWEtvFCQBRQ62273M/2+4HV1Lk=";
+  };
+
+  fetchedMavenDeps = stdenv.mkDerivation {
+    name = "java-language-server-${version}-maven-deps";
+    inherit src;
+    buildInputs = [ maven ];
+
+    buildPhase = ''
+      runHook preBuild
+
+      mvn package -Dmaven.repo.local=$out -DskipTests
+
+      runHook postBuild
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      find $out -type f \
+        -name \*.lastUpdated -or \
+        -name resolver-status.properties -or \
+        -name _remote.repositories \
+        -delete
+
+      runHook postInstall
+    '';
+
+    dontFixup = true;
+    dontConfigure = true;
+    outputHashAlgo = "sha256";
+    outputHashMode = "recursive";
+    outputHash = "sha256-YkcQKmm8oeEH7uyUzV/qGoe4LiI6o5wZ7o69qrO3oCA=";
+  };
+
+
+  nativeBuildInputs = [ maven jdk makeWrapper ];
+
+  dontConfigure = true;
+  buildPhase = ''
+    runHook preBuild
+
+    jlink \
+      ${lib.optionalString (!stdenv.isDarwin) "--module-path './jdks/${platform}/jdk-13/jmods'"} \
+      --add-modules java.base,java.compiler,java.logging,java.sql,java.xml,jdk.compiler,jdk.jdi,jdk.unsupported,jdk.zipfs \
+      --output dist/${platform} \
+      --no-header-files \
+      --no-man-pages \
+      --compress 2
+
+    mvn package --offline -Dmaven.repo.local=${fetchedMavenDeps} -DskipTests
+
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/share/java/java-language-server
+    cp -r dist/classpath dist/*${platform}* $out/share/java/java-language-server
+
+    # a link is not used as lang_server_${platform}.sh makes use of "dirname $0" to access other files
+    makeWrapper $out/share/java/java-language-server/lang_server_${platform}.sh $out/bin/java-language-server
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "A Java language server based on v3.0 of the protocol and implemented using the Java compiler API";
+    homepage = "https://github.com/georgewfraser/java-language-server";
+    license = licenses.mit;
+    maintainers = with maintainers; [ hqurve ];
+    platforms = platforms.all;
+  };
+}