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

Author: xu-shawn

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)

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>
 

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");

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