#!/bin/bash
# Copyright (c) 2016-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#  * Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#  * Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#  * Neither the name of NVIDIA CORPORATION nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Gather parts in alpha order
shopt -s nullglob extglob
_SCRIPT_DIR="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"
declare -a _PARTS=( "${_SCRIPT_DIR}/entrypoint.d"/*@(.txt|.sh) )
shopt -u nullglob extglob

print_repeats() {
  local -r char="$1" count="$2"
  local i
  for ((i=1; i<=$count; i++)); do echo -n "$char"; done
  echo
}

print_banner_text() {
  # $1: Banner char
  # $2: Text
  local banner_char=$1
  local -r text="$2"
  local pad="${banner_char}${banner_char}"
  print_repeats "${banner_char}" $((${#text} + 6))
  echo "${pad} ${text} ${pad}"
  print_repeats "${banner_char}" $((${#text} + 6))
}

# Execute the entrypoint parts
for _file in "${_PARTS[@]}"; do
  case "${_file}" in
    *.txt) cat "${_file}";;
    *.sh)  source "${_file}";;
  esac
done

echo

# This script can either be a wrapper around arbitrary command lines,
# or it will simply exec bash if no arguments were given
if [[ $# -eq 0 ]]; then
  exec "/bin/bash"
else
  exec "$@"
fi