#!/usr/bin/env bash
# Compile arena's own Java - MatchHost, MatchWatcher, TextRenderer - into a jar.
#
#   MM_HOME    extracted MegaMek release, for the compile classpath
#   OUT_JAR    where to write arena.jar
#   JAVA_HOME  a JDK
#
# Compiled against the *stock* MegaMek jar on purpose. Nothing in src/ may depend
# on anything the patchset adds: the patches are MegaMek bugs we intend to
# upstream, and if our own code needed them we would have turned a temporary
# carry into a permanent fork. It is also the constraint the eventual ATProto
# adapter has to live under - public API only.
set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
: "${MM_HOME:?MM_HOME is required}"
: "${OUT_JAR:?OUT_JAR is required}"
: "${JAVA_HOME:?JAVA_HOME is required}"

CLASSES="${CLASSES:-/tmp/arena-classes}"

[ -f "$MM_HOME/MegaMek.jar" ] || { echo "ERROR: no MegaMek.jar under $MM_HOME" >&2; exit 1; }

CP="$MM_HOME/MegaMek.jar"
for jar in "$MM_HOME"/lib/*.jar; do CP="$CP:$jar"; done

rm -rf "$CLASSES"
mkdir -p "$CLASSES"

"$JAVA_HOME/bin/javac" -nowarn -Xlint:-options -classpath "$CP" -d "$CLASSES" "$HERE"/arena/*.java
"$JAVA_HOME/bin/jar" --create --file "$OUT_JAR" -C "$CLASSES" arena

echo "built -> $OUT_JAR"