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1#! /bin/bash
2# Copyright 2019 The gRPC Authors
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#     http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15
16set -e
17
18BUILDIFIER_VERSION="0.29.0"
19TEMP_BUILDIFIER_PATH="/tmp/buildifier"
20EXTRA_BUILDIFIER_FLAGS=$*
21
22function error_handling() {
23    error=$1
24    if [[ -x "$error" ]]; then
25        echo "${error}"
26        exit 1
27    fi
28}
29
30function download_buildifier() {
31    platform="$(uname -s)"
32    case "${platform}" in
33        Linux*)     download_link="https://github.com/bazelbuild/buildtools/releases/download/${BUILDIFIER_VERSION}/buildifier";;
34        Darwin*)    download_link="https://github.com/bazelbuild/buildtools/releases/download/${BUILDIFIER_VERSION}/buildifier.mac";;
35        *)          error_handling "Unsupported platform: ${platform}";;
36    esac
37
38    if [ -x "$(command -v curl)" ]; then
39        curl -L -o ${TEMP_BUILDIFIER_PATH} ${download_link}
40    elif [ -x "$(command -v wget)" ]; then
41        wget -O ${TEMP_BUILDIFIER_PATH} ${download_link}
42    else
43        error_handling "Download failed: curl and wget not available"
44    fi
45
46    chmod +x ${TEMP_BUILDIFIER_PATH}
47}
48
49
50# Get the correct version of buildifier
51if [ -x "$(command -v buildifier)" ]; then
52    existing_buildifier_version="$(buildifier -version 2>&1 | head -n1 | cut -d" " -f3)"
53    if [[ "${existing_buildifier_version}" != "${BUILDIFIER_VERSION}" ]]; then
54        download_buildifier
55        buildifier_bin="${TEMP_BUILDIFIER_PATH}"
56    else
57        buildifier_bin="buildifier"
58    fi
59else
60    download_buildifier
61    buildifier_bin="${TEMP_BUILDIFIER_PATH}"
62fi
63
64# cd to repo root
65dir=$(dirname "${0}")
66cd "${dir}/../.."
67
68bazel_files=$(find . \( -iname 'BUILD' -o -iname '*.bzl' -o -iname '*.bazel' -o -iname 'WORKSPACE' \) -type f -not -path "./third_party/*")
69# shellcheck disable=SC2086,SC2068
70${buildifier_bin} ${EXTRA_BUILDIFIER_FLAGS[@]} -v ${bazel_files}
71