#!/bin/bash
# Copyright 2019 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Wrapper for buildifier: only run if buildifier exists and filter out non-bazel
# files.

declare -r PRESUBMIT_FILES

# Filter out anything which doesn't look like a build or bazel file
files=$(echo "${PRESUBMIT_FILES:?}" | tr ' ' '\n' | grep -E 'BUILD|\.bzl')

if [[ -n "${files}" ]] && command -v buildifier &>/dev/null; then
    messages=$(buildifier --lint=warn --mode=check ${files})
    if [[ -n "${messages}" ]]; then
        echo "Style check failed: ${messages}" >&2
        echo "Try running buildifier --lint=fix on your bazel files to"\
                 "automatically fix." >&2
        exit 1
    fi
fi
# If they don't have buildifier do nothing.