Scripts Take Rom as Arg (#512)

* initial

* suggestions for get_memory_map.sh

* CONTRIBUTING.md suggestions

* save_build.sh suggestions

* rerun

* env variable

* add to env

* print usage and remove redundant qoutes

scripts/save_build.sh

@@ -5,21 +5,41 @@
 
 set -e
 
+usage() {
+    echo "Usage: $(basename "$0") <rom-file> [build-label]"
+    echo "  <rom-file>    Path to the .gba ROM file (e.g. build/balatro-gba.gba)"
+    echo "  [build-label] Optional label for the saved build directory (default: \"build\")"
+    exit 1
+}
+
+if [ $# -lt 1 ]; then
+    usage
+fi
+
+ROM_FILE="$1"
+
 make
 
-GAME_NAME="${GAME_NAME-balatro-gba}"
+if [ ! -f "$ROM_FILE" ]; then
+    echo "Error: ROM file not found or is not a regular file: $ROM_FILE"
+    usage
+fi
+
+# Derive the game base name from the ROM file (strip directory and .gba extension)
+GAME_NAME="$(basename "$ROM_FILE" .gba)"
 timestamp=$(date +%Y%m%d_%H%M%S)
-arg=${1:-"build"}
+arg="${2:-build}"
 dir="saved_builds/${arg}_${timestamp}"
 
 mkdir -p "$dir"
 
 failed=0
 for fe in elf gba map; do
-    if [ -f build/"$GAME_NAME".$fe ]; then
-        cp build/"$GAME_NAME".$fe "$dir/"
+    src="$(dirname "$ROM_FILE")/${GAME_NAME}.${fe}"
+    if [ -f "$src" ]; then
+        cp "$src" "$dir/"
     else
-        echo "Warning: build/$GAME_NAME.$fe not found"
+        echo "Warning: $src not found"
         failed=1
     fi
 done
@@ -31,4 +51,3 @@ else
 fi
 
 exit $failed
-