OpenRA3 v0.0.1: C++26 modules, BIG4/RefPack reader, minimal skirmish

tools/fetch_reference.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Sparse-clone the GPLv3 SAGE 1.0 engine sources used as OpenRA3's reference.
+#
+# Usage: tools/fetch_reference.sh [destination]
+set -euo pipefail
+
+REPO="https://github.com/electronicarts/CnC_Generals_Zero_Hour.git"
+DEST="${1:-reference/CnC_Generals_Zero_Hour}"
+
+if [ -d "$DEST/.git" ]; then
+    echo "reference already present at $DEST"
+    exit 0
+fi
+
+mkdir -p "$(dirname "$DEST")"
+git clone --depth 1 --filter=blob:none --sparse "$REPO" "$DEST"
+git -C "$DEST" sparse-checkout set Generals GeneralsMD
+echo "reference ready at $DEST"