server-dotfiles/mail/setup.sh

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#! /bin/bash
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# version v1.0.0
# executed manually / via Make
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# task wrapper for various setup scripts
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CONFIG_PATH=
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CONTAINER_NAME=
CRI=
DEFAULT_CONFIG_PATH=
DESIRED_CONFIG_PATH=
DIR="$(pwd)"
DMS_CONFIG='/tmp/docker-mailserver'
IMAGE_NAME=
INFO=
PODMAN_ROOTLESS=false
USE_SELINUX=
USE_TTY=
VOLUME=
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RED="\e[31m\e[1m"
WHITE="\e[37m"
ORANGE="\e[38;5;214m"
LBLUE="\e[94m"
RESET="\e[0m"
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set -euEo pipefail
trap '__err "${BASH_SOURCE}" "${FUNCNAME[0]:-?}" "${BASH_COMMAND:-?}" "${LINENO:-?}" "${?:-?}"' ERR
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function __err
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{
[[ ${5} -gt 1 ]] && exit 1
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local ERR_MSG="\n--- ${RED}UNCHECKED ERROR${RESET}"
ERR_MSG+="\n - script = ${1}"
ERR_MSG+="\n - function = ${2}"
ERR_MSG+="\n - command = ${3}"
ERR_MSG+="\n - line = ${4}"
ERR_MSG+="\n - exit code = ${5}"
ERR_MSG+='\n\nThis should not have happened. Please file a bug report.\n'
echo -e "${ERR_MSG}"
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}
function _show_local_usage
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{
# shellcheck disable=SC2059
printf "${ORANGE}OPTIONS${RESET}
${LBLUE}Config path, container or image adjustments${RESET}
-i IMAGE_NAME
Provides the name of the 'docker-mailserver' image. The default value is
'${WHITE}docker.io/mailserver/docker-mailserver:latest${RESET}'
-c CONTAINER_NAME
Provides the name of the running container.
-p PATH
Provides the local path of the config folder to the temporary container instance.
Does not work if an existing a 'docker-mailserver' container is already running.
${LBLUE}SELinux${RESET}
-z
Allows container access to the bind mount content that is shared among
multiple containers on a SELinux-enabled host.
-Z
Allows container access to the bind mount content that is private and
unshared with other containers on a SELinux-enabled host.
${LBLUE}Podman${RESET}
-R
Accept running in Podman rootless mode. Ignored when using Docker / Docker Compose.
"
[[ ${1:-} == 'no-exit' ]] && return 0
# shellcheck disable=SC2059
printf "${ORANGE}EXIT STATUS${RESET}
Exit status is 0 if the command was successful. If there was an unexpected error, an error
message is shown describing the error. In case of an error, the script will exit with exit
status 1.
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"
}
function _get_absolute_script_directory
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{
if [[ "$(uname)" == 'Darwin' ]]
then
readlink() {
# requires coreutils
greadlink "${@:+$@}"
}
fi
if dirname "$(readlink -f "${0}")" &>/dev/null
then
DIR="$(dirname "$(readlink -f "${0}")")"
elif realpath -e -L "${0}" &>/dev/null
then
DIR="$(realpath -e -L "${0}")"
DIR="${DIR%/setup.sh}"
fi
DEFAULT_CONFIG_PATH="${DIR}/config"
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}
function _handle_config_path
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{
if [[ -z ${DESIRED_CONFIG_PATH} ]]
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then
# no desired config path
if [[ -n ${CONTAINER_NAME} ]]
then
VOLUME=$(${CRI} inspect "${CONTAINER_NAME}" \
--format="{{range .Mounts}}{{ println .Source .Destination}}{{end}}" | \
grep "${DMS_CONFIG}$" 2>/dev/null || :)
fi
if [[ -n ${VOLUME} ]]
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then
CONFIG_PATH=$(echo "${VOLUME}" | awk '{print $1}')
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fi
if [[ -z ${CONFIG_PATH} ]]
then
CONFIG_PATH=${DEFAULT_CONFIG_PATH}
fi
else
CONFIG_PATH=${DESIRED_CONFIG_PATH}
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fi
}
function _run_in_new_container
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{
# start temporary container with specified image
if ! ${CRI} history -q "${IMAGE_NAME}" &>/dev/null
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then
echo "Image '${IMAGE_NAME}' not found. Pulling ..."
${CRI} pull "${IMAGE_NAME}"
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fi
${CRI} run --rm "${USE_TTY}" \
-v "${CONFIG_PATH}:${DMS_CONFIG}${USE_SELINUX}" \
"${IMAGE_NAME}" "${@:+$@}"
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}
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function _main
{
_get_absolute_script_directory
local OPTIND
while getopts ":c:i:p:zZR" OPT
do
case ${OPT} in
( i ) IMAGE_NAME="${OPTARG}" ;;
( z | Z ) USE_SELINUX=":${OPT}" ;;
( c ) CONTAINER_NAME="${OPTARG}" ;;
( R ) PODMAN_ROOTLESS=true ;;
( p )
case "${OPTARG}" in
( /* ) DESIRED_CONFIG_PATH="${OPTARG}" ;;
( * ) DESIRED_CONFIG_PATH="${DIR}/${OPTARG}" ;;
esac
if [[ ! -d ${DESIRED_CONFIG_PATH} ]]
then
echo "Specified directory '${DESIRED_CONFIG_PATH}' doesn't exist" >&2
exit 1
fi
;;
( * )
echo "Invalid option: '-${OPTARG}'" >&2
echo -e "Use './setup.sh help' to get a complete overview.\n" >&2
_show_local_usage 'no-exit'
exit 1
;;
esac
done
shift $(( OPTIND - 1 ))
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if command -v docker &>/dev/null
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then
CRI=docker
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elif command -v podman &>/dev/null
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then
CRI=podman
if ! ${PODMAN_ROOTLESS} && [[ ${EUID} -ne 0 ]]
then
read -r -p "You are running Podman in rootless mode. Continue? [Y/n] "
[[ -n ${REPLY} ]] && [[ ${REPLY} =~ (n|N) ]] && exit 0
fi
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else
echo 'No supported Container Runtime Interface detected.'
exit 1
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fi
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INFO=$(${CRI} ps --no-trunc --format "{{.Image}};{{.Names}}" --filter \
label=org.opencontainers.image.title="docker-mailserver" | tail -1)
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CONTAINER_NAME=${INFO#*;}
[[ -z ${IMAGE_NAME} ]] && IMAGE_NAME=${INFO%;*}
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if [[ -z ${IMAGE_NAME} ]]
then
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IMAGE_NAME=${NAME:-docker.io/mailserver/docker-mailserver:latest}
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fi
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if test -t 0
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then
USE_TTY="-it"
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else
# GitHub Actions will fail (or really anything else
# lacking an interactive tty) if we don't set a
# value here; "-t" alone works for these cases.
USE_TTY="-t"
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fi
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_handle_config_path
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if [[ -n ${CONTAINER_NAME} ]]
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then
${CRI} exec "${USE_TTY}" "${CONTAINER_NAME}" setup "${@:+$@}"
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else
_run_in_new_container setup "${@:+$@}"
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fi
[[ ${1} == 'help' ]] && _show_local_usage
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return 0
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}
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_main "${@:+$@}"