#!/usr/bin/env bash
# Copyright 2024 PingCAP, Inc.
#
# 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
set -o nounset
set -o pipefail

# source only once
[[ $(type -t util::loaded) == function ]] && return 0

# NOTE: this function is copied from kubernetes/hack/lib/util.sh#kube::util::trap_add
#
# Example:  kube::util::trap_add 'echo "in trap DEBUG"' DEBUG
# See: http://stackoverflow.com/questions/3338030/multiple-bash-traps-for-the-same-signal
util::trap_add() {
  local trap_add_cmd
  trap_add_cmd=$1
  shift

  for trap_add_name in "$@"; do
    local existing_cmd
    local new_cmd

    # Grab the currently defined trap commands for this trap
    existing_cmd=$(trap -p "${trap_add_name}" |  awk -F"'" '{print $2}')

    if [[ -z "${existing_cmd}" ]]; then
      new_cmd="${trap_add_cmd}"
    else
      new_cmd="${trap_add_cmd};${existing_cmd}"
    fi

    # Assign the test. Disable the shellcheck warning telling that trap
    # commands should be single quoted to avoid evaluating them at this
    # point instead evaluating them at run time. The logic of adding new
    # commands to a single trap requires them to be evaluated right away.
    # shellcheck disable=SC2064
    trap "${new_cmd}" "${trap_add_name}"
  done
}

# NOTE: this function is copied from kubernetes/hack/lib/util.sh#kube::util::ensure_clean_working_dir
#
# Exits script if working directory is dirty. If it's run interactively in the terminal
# the user can commit changes in a second terminal. This script will wait.
util::ensure_clean_working_dir() {
  local interactive=${1:-0}

  while ! git diff HEAD --exit-code &>/dev/null; do
    echo -e "\nUnexpected dirty working directory:\n"
    if tty -s && [[ $interactive -eq 1 ]]; then
        git status -s
    else
        git diff -a # be more verbose in log files without tty
        exit 1
    fi | sed 's/^/  /'
    echo -e "\nCommit your changes in another terminal and then continue here by pressing enter."
    read -r
  done 1>&2
}

# marker function
function util::loaded() {
  return 0
}