Add {update/verify}/proto-fmt.sh via clang-format

Next commit runs the tool.

Author: thockin

hack/update/proto-fmt.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit -o nounset -o pipefail
+
+ROOT="$(git rev-parse --show-toplevel)"
+cd "${ROOT}"
+
+# Find clang-format in the PATH, and exit if not found.
+tool="clang-format"
+clangfmt="$(which "$tool" 2>/dev/null || true)"
+if [[ ! -x "${clangfmt}" ]]; then
+  echo "Failed to find ${tool}: please make sure it is in your PATH" >&2
+  exit 1
+fi
+
+# Find all top-level directories containing proto files, and run clangfmt on them.
+# shellcheck disable=SC2207 # reading array
+files=(
+    $(git ls-files \
+        -cmo \
+        --exclude-standard \
+        -- \
+        ':(glob)**/*.proto' \
+        ':!:vendor/*' \
+        ':!:**/vendor/*' \
+        ':!:LICENSES/*' \
+        | sort \
+        | uniq)
+)
+
+# Run clang-format on the found files.
+#
+# Don't reflow long lines, wince those tend to be comments which then require
+# re-running the proto generators, which makes "update-all" awkward.
+"${clangfmt}" \
+    -i \
+    --style="{BasedOnStyle: LLVM, ColumnLimit: 0}" \
+    "${files[@]}"

hack/verify/proto-fmt.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit -o nounset -o pipefail
+
+ROOT="$(git rev-parse --show-toplevel)"
+cd "${ROOT}"
+
+./hack/third_party/kubernetes/verify-generated.sh proto-fmt "$@"