chore: checkpoint before Python removal

vendor/zerocopy/ci/check_fmt.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+#
+# Copyright 2024 The Fuchsia Authors
+#
+# Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0
+# <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT
+# license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+set -eo pipefail
+
+if [[ "$1" == "--fix" ]]; then
+    FMT_FLAGS=""
+else
+    FMT_FLAGS="--check"
+fi
+
+find . -iname '*.rs' -type f -not -path './target/*' -not -iname '*.expected.rs' -not -path './vendor/*' -not -path './tools/vendor/*' -print0 | xargs -0 --no-run-if-empty ./cargo.sh +nightly fmt $FMT_FLAGS -- >&2