Add macOS script

git-mirror-zip-macos.sh

@@ -0,0 +1,25 @@
+# Clone a git repo as a full mirror and pack it into a zip archive.
+# Works on macOS (uses ditto for native compression).
+
+set -euo pipefail
+
+if [ $# -lt 1 ]; then
+  echo "Usage: $0 <git-repo-url> [output.zip]"
+  exit 1
+fi
+
+URL="$1"
+OUT="${2:-repo.zip}"
+WORK_DIR=".tmp_git_mirror"
+
+cleanup() { rm -rf "$WORK_DIR"; }
+trap cleanup EXIT
+
+echo "[1/3] Cloning mirror of $URL ..."
+git clone --mirror "$URL" "$WORK_DIR"
+
+echo "[2/3] Creating $OUT with maximum compression ..."
+ditto -c -k --seedy --rsrc --keepParent "$WORK_DIR" "$OUT"
+
+SIZE=$(du -m "$OUT" | cut -f1)
+echo "[3/3] Done: $OUT (${SIZE} MB)"