From a81011bcc19db1982c28ae207fbc48ec68bcdea8 Mon Sep 17 00:00:00 2001
From: Olli Helenius <liff@iki.fi>
Date: Sun, 24 Nov 2024 13:14:18 +0200
Subject: [PATCH] gradle: add udev to the JNA library path

Running `gradle build --scan` results in this warning:

    Did not find udev library in operating system.
    Some features may not work.

The udev library is looked up using JNA, which searches
`jna.library.path` in addition to the standard locations. Adding
`udev` to the lookup path in the wrapper ensures that Gradle can find
the library.

Fixes: #358166.
---
 pkgs/development/tools/build-managers/gradle/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/tools/build-managers/gradle/default.nix b/pkgs/development/tools/build-managers/gradle/default.nix
index 5f34894e8dc37..80724fff7b789 100644
--- a/pkgs/development/tools/build-managers/gradle/default.nix
+++ b/pkgs/development/tools/build-managers/gradle/default.nix
@@ -37,6 +37,7 @@ rec {
     , unzip
     , ncurses5
     , ncurses6
+    , udev
     , testers
     , runCommand
     , writeText
@@ -91,6 +92,7 @@ rec {
           };
           varDefs = concatStringsSep "\n" (map (x: "  --set ${x} \\")
             ([ "JAVA_HOME ${java}" ] ++ toolchain.varDefs));
+          jnaLibraryPath = lib.makeLibraryPath [ udev ];
         in ''
           mkdir -pv $out/lib/gradle/
           cp -rv lib/ $out/lib/gradle/
@@ -99,6 +101,7 @@ rec {
           test -f $gradle_launcher_jar
           makeWrapper ${java}/bin/java $out/bin/gradle \
             ${varDefs}
+            --add-flags "-Djna.library.path=${jnaLibraryPath}" \
             --add-flags "-classpath $gradle_launcher_jar org.gradle.launcher.GradleMain${toolchain.property}"
         '';
 
@@ -129,6 +132,7 @@ rec {
         # Gradle will refuse to start without _both_ 5 and 6 versions of ncurses.
         echo ${ncurses5} >> $out/nix-support/manual-runtime-dependencies
         echo ${ncurses6} >> $out/nix-support/manual-runtime-dependencies
+        echo ${udev} >> $out/nix-support/manual-runtime-dependencies
       '';
 
       passthru.tests = {