chore: stat to resolve script dir on macos and realpath otherwise

bin/emqx

@@ -7,7 +7,11 @@ set -euo pipefail
 DEBUG="${DEBUG:-0}"
 [ "$DEBUG" -eq 1 ] && set -x
 
-RUNNER_ROOT_DIR="$(cd "$(dirname "$(readlink "$0" || echo "$0")")"/..; pwd -P)"
+if [ "$(uname -s)" == 'Darwin' ]; then
+    RUNNER_ROOT_DIR="$(cd "$(dirname "$(stat -f%R "$0" || echo "$0")")"/..; pwd -P)"
+else
+    RUNNER_ROOT_DIR="$(cd "$(dirname "$(realpath "$0" || echo "$0")")"/..; pwd -P)"
+fi
 
 # shellcheck disable=SC1090,SC1091
 . "$RUNNER_ROOT_DIR"/releases/emqx_vars