besu: use jemalloc if possible (#511)

* besu: use jemalloc if possible

* besu: add aarch64-darwin as supported platform

pkgs/besu/default.nix

@@ -1,11 +1,14 @@
 {
   fetchurl,
+  jemalloc,
   jre,
   lib,
   makeWrapper,
+  runCommand,
   stdenv,
+  testers,
 }:
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: rec {
   pname = "besu";
   version = "24.3.3";
 
@@ -14,22 +17,44 @@ stdenv.mkDerivation rec {
     hash = "sha256-ua7lGVIYf/VQ3kgfLAQFE3uF8dCqOCYWDfbX5QXzWa4=";
   };
 
+  buildInputs = lib.optionals stdenv.isLinux [jemalloc];
   nativeBuildInputs = [makeWrapper];
 
   installPhase = ''
     mkdir -p $out/bin
     cp -r bin $out/
     mkdir -p $out/lib
     cp -r lib $out/
-    wrapProgram $out/bin/${pname} --set JAVA_HOME "${jre}"
+    wrapProgram $out/bin/${pname} --set JAVA_HOME "${jre}" --suffix ${
+      if stdenv.isDarwin
+      then "DYLD_LIBRARY_PATH"
+      else "LD_LIBRARY_PATH"
+    } : ${lib.makeLibraryPath buildInputs}
   '';
 
+  passthru.tests = {
+    version = testers.testVersion {
+      package = finalAttrs.finalPackage;
+      version = "v${version}";
+    };
+    jemalloc =
+      runCommand "${pname}-test-jemalloc"
+      {
+        nativeBuildInputs = [finalAttrs.finalPackage];
+        meta.platforms = with lib.platforms; linux;
+      } ''
+        # Expect to find this string in the output, ignore other failures.
+        (besu 2>&1 || true) | grep -q "# jemalloc: ${jemalloc.version}"
+        mkdir $out
+      '';
+  };
+
   meta = with lib; {
     description = "Besu is an Apache 2.0 licensed, MainNet compatible, Ethereum client written in Java";
     homepage = "https://github.com/hyperledger/besu";
     license = licenses.asl20;
     mainProgram = "besu";
-    platforms = ["x86_64-linux"];
+    platforms = ["aarch64-darwin" "x86_64-linux"];
     sourceProvenance = with sourceTypes; [binaryBytecode];
   };
-}
+})