jls

pkgs/default.nix

@@ -11,6 +11,7 @@ let
     };
     khal-export = pkgs.callPackage ./khal-export { };
     org-zotero-export = pkgs.callPackage ./org-zotero-export { };
+    jls = pkgs.callPackage ./jls { };
   };
 in
 self // { default = self.example-a; }

pkgs/jls/default.nix

@@ -0,0 +1,87 @@
+{
+  lib,
+  maven,
+  jdk21,
+  fetchFromGitHub,
+  writeShellScript,
+}:
+let
+  jdk = jdk21;
+in
+maven.buildMavenPackage rec {
+  pname = "jls";
+  version = "0-unstable-2025-11-15";
+
+  src = fetchFromGitHub {
+    owner = "idelice";
+    repo = "jls";
+    rev = "82d341b55258113c6112e673518f92d84d1f7dd7";
+    hash = "sha256-MCm0sYoHgSNHJgKWAXw67Qct4derqpy0uD+PtzNyDhc=";
+  };
+
+  mvnJdk = jdk;
+  mvnHash = "sha256-x1Je1mcvovs4brwNaROKOlnZ4YvqrZicuCCcGSCIFP8=";
+
+  mvnParameters = "-DskipTests";
+
+  # The configure script just sets up git hooks, not needed for build
+  postPatch = ''
+    rm -f configure
+  '';
+
+  installPhase =
+    let
+      jvmFlags = lib.concatStringsSep " " [
+        "--add-modules jdk.jdeps"
+        "--add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED"
+        "--add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED"
+        "--add-opens jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED"
+      ];
+    in
+    ''
+      runHook preInstall
+
+      mkdir -p $out/share/jls $out/bin
+
+      cp dist/classpath/*.jar $out/share/jls/
+
+      cat > $out/bin/jls <<'WRAPPER'
+#!/bin/sh
+exec @java@ ${jvmFlags} -classpath "@classpath@" org.javacs.Main "$@"
+WRAPPER
+      chmod +x $out/bin/jls
+      substituteInPlace $out/bin/jls \
+        --replace-fail "@java@" "${jdk}/bin/java" \
+        --replace-fail "@classpath@" "$out/share/jls/*"
+
+      runHook postInstall
+    '';
+
+  meta = {
+    description = "Java Language Server using the Java compiler API";
+    homepage = "https://github.com/idelice/jls";
+    license = lib.licenses.mit;
+    mainProgram = "jls";
+    platforms = lib.platforms.unix;
+  };
+}