entrypoint.sh

#!/bin/bash

# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this
# software and associated documentation files (the "Software"), to deal in the Software
# without restriction, including without limitation the rights to use, copy, modify,
# merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
# PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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