#!/bin/bash

# Copyright 2022 Google LLC
#
# 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
#
#     https://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.
#
# This container is based off Sameer Naik's existing squid container.
# https://github.com/sameersbn/docker-squid

set -e

create_log_dir() {
  mkdir -p ${SQUID_LOG_DIR}
  chmod -R 755 ${SQUID_LOG_DIR}
  chown -R ${SQUID_USER}:${SQUID_USER} ${SQUID_LOG_DIR}
}

create_cache_dir() {
  mkdir -p ${SQUID_CACHE_DIR}
  chown -R ${SQUID_USER}:${SQUID_USER} ${SQUID_CACHE_DIR}
}

create_log_dir
create_cache_dir

# allow arguments to be passed to squid
if [[ ${1:0:1} = '-' ]]; then
  EXTRA_ARGS="$@"
  set --
elif [[ ${1} == squid || ${1} == $(which squid) ]]; then
  EXTRA_ARGS="${@:2}"
  set --
fi

# default behaviour is to launch squid
if [[ -z ${1} ]]; then
  if [[ ! -d ${SQUID_CACHE_DIR}/00 ]]; then
    echo "Initializing cache..."
    $(which squid) -N -f /etc/squid/squid.conf -z
  fi
  echo "Starting squid..."
  exec $(which squid) -f /etc/squid/squid.conf -NYCd 1 ${EXTRA_ARGS}
else
  exec "$@"
fi
