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#!/bin/bash
# Copyright 2016 The Android Open Source Project
#
# 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 -eu

GITHUB_URL="https://github.com/google/styleguide/raw/gh-pages"
SCRIPT_DIR="$(dirname "$(readlink -f -- "$0")")"

usage() {
  cat <<EOF
Usage: $0

Helper script to quickly update the bundled cpplint.py script.

EOF

  if [[ $# -ne 0 ]]; then
    echo "ERROR: $*" 2>&1
    exit 1
  else
    exit 0
  fi
}

main() {
  while [[ $# -gt 0 ]]; do
    case $1 in
    -h|--help) usage;;
    -x) set -x;;
    *) usage "Unknown option: $1";;
    esac
    shift
  done

  # Download cpplint.py from upstream.
  local cpplint_py="${SCRIPT_DIR}/cpplint.py"
  wget "${GITHUB_URL}/cpplint/cpplint.py" -O "${cpplint_py}"
  sed -i '2i# pylint: skip-file' "${cpplint_py}"
  chmod +x "${cpplint_py}"
}

main "$@"