From 4aca025b867223de667d32d9104add0a322cf83c Mon Sep 17 00:00:00 2001
From: xu-shawn <50402888+xu-shawn@users.noreply.github.com>
Date: Tue, 13 Aug 2024 16:42:48 -0700
Subject: [PATCH] Fix Build on Older Workers (#114)

Elo   | 10.78 +- 6.75 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=8MB
LLR   | 2.98 (-2.94, 2.94) [-5.00, 0.00]
Games | N: 3418 W: 896 L: 790 D: 1732
Penta | [34, 371, 809, 445, 50]
https://chess.aronpetkovski.com/test/2826/

bench 1849271
---
 Makefile                                        |  3 +--
 Serendipity/pom.xml                             |  4 ++--
 .../org/shawn/games/Serendipity/UCI/UCI.java    |  2 +-
 header.sh                                       | 17 +++++++++++++++++
 4 files changed, 21 insertions(+), 5 deletions(-)
 create mode 100644 header.sh

diff --git a/Makefile b/Makefile
index ed783e5d..4769cd91 100644
--- a/Makefile
+++ b/Makefile
@@ -5,6 +5,5 @@ ifdef EVALFILE
 	cp $(EVALFILE) ./Serendipity/src/main/resources/embedded.nnue
 endif
 	mvn -f ./Serendipity/pom.xml package
-	echo "#!/usr/bin/env -S java -jar -Xmx128m" > $(EXE)
-	cat ./Serendipity/target/Serendipity-Test.jar >> $(EXE)
+	cat header.sh ./Serendipity/target/Serendipity-Test.jar > $(EXE)
 	chmod +x $(EXE)
diff --git a/Serendipity/pom.xml b/Serendipity/pom.xml
index 7229063f..f4f5b0e6 100644
--- a/Serendipity/pom.xml
+++ b/Serendipity/pom.xml
@@ -14,8 +14,8 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <maven.compiler.source>17</maven.compiler.source>
-    <maven.compiler.target>17</maven.compiler.target>
+    <maven.compiler.source>8</maven.compiler.source>
+    <maven.compiler.target>8</maven.compiler.target>
     <revision>Test</revision>
   </properties>
   
diff --git a/Serendipity/src/main/java/org/shawn/games/Serendipity/UCI/UCI.java b/Serendipity/src/main/java/org/shawn/games/Serendipity/UCI/UCI.java
index 61255558..942ebef7 100644
--- a/Serendipity/src/main/java/org/shawn/games/Serendipity/UCI/UCI.java
+++ b/Serendipity/src/main/java/org/shawn/games/Serendipity/UCI/UCI.java
@@ -71,7 +71,7 @@ public void set(String value)
 
 	public static void main(String args[])
 	{
-		transpositionTable = new TranspositionTable(32);
+		transpositionTable = new TranspositionTable(4);
 		options = new HashMap<>();
 		networkName = new NNUEOption("embedded.nnue", "nnuefile");
 		threads = new IntegerOption(1, 1, 1, "Threads");
diff --git a/header.sh b/header.sh
new file mode 100644
index 00000000..2c49281b
--- /dev/null
+++ b/header.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Taken from https://web.archive.org/web/20240813210415/https://coderwall.com/p/ssuaxa/how-to-make-a-jar-file-linux-executable
+
+MYSELF=`which "$0" 2>/dev/null`
+
+[ $? -gt 0 -a -f "$0" ] && MYSELF="./$0"
+
+java=java
+
+if test -n "$JAVA_HOME"; then
+    java="$JAVA_HOME/bin/java"
+fi
+
+exec "$java" -Xms48m -Xmx48m -XX:+UseParallelGC $java_args -jar $MYSELF "$@"
+
+exit 1