lm-docker

#!/usr/bin/env bash

# Copyright (c) 2020-2024 CRS4
#
# 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, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# 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 -o nounset
set -o errexit

function debug_log() {
    if [[ -n "${DEBUG:-}" ]]; then
        log "${@}"
    fi
}

function log() {
    printf "%s [lm-docker] %s\n" "$(date +"%F %T")" "${*}" >&2
}

# Configure DEBUG mode
DEBUG="${DEBUG:-0}"
DEBUG_OPT=""

# Configure Docker image
DOCKER_IMAGE="crs4/lifemonitor:latest"

# Configure default LOCAL_PATH
LOCAL_PATH="."

# Collect arguments to be passed on to the next program in an array, rather than
# a simple string. This choice lets us deal with arguments that contain spaces.
ENTRYPOINT_ARGS=()

# Configure Docker command
docker_cmd=$(which docker)

# Configure default volume mount option
docker_volume_opt=""
docker_volume_arg=""

# parse arguments
while [ -n "${1:-}" ]; do
    # Copy so we can modify it (can't modify $1)
    OPT="$1"
    # Detect argument termination
    if [ x"$OPT" = x"--" ]; then
        shift
        for OPT; do
            # append to array
            ENTRYPOINT_ARGS+=("$OPT")
        done
        break
    fi
    # Parse current opt
    while [ x"$OPT" != x"-" ]; do
        case "$OPT" in
        -d | --debug)
            DEBUG="1"
            DEBUG_OPT="--debug"
            ;;
        -o | --output-path)
            LOCAL_PATH="$2"
            docker_volume_opt="-v ${LOCAL_PATH}:${LOCAL_PATH}"
            docker_volume_arg="--output-path ${LOCAL_PATH}"
            mkdir -p ${LOCAL_PATH}
            shift
            ;;
        -*=* | --*=*) # unsupported option format
            echo "Error: Unsupported option format "$1". Retry without '='" >&2
            exit 1
            ;;
        *)
            # append to array
            ENTRYPOINT_ARGS+=("$OPT")
            break
            ;;
        esac
        # Check for multiple short options
        # NOTICE: be sure to update this pattern to match valid options
        NEXTOPT="${OPT#-[cfr]}" # try removing single short opt
        if [ x"$OPT" != x"$NEXTOPT" ]; then
            OPT="-$NEXTOPT" # multiple short opts, keep going
        else
            break # long form, exit inner loop
        fi
    done
    # move to the next param
    shift
done

if [[ -n "${ENTRYPOINT_ARGS:-}" ]]; then
    debug_log "ENTRYPOINT ARGS: ${ENTRYPOINT_ARGS}"
    debug_log "LOCAL PATH: ${LOCAL_PATH}"

    # Run Docker container
    ${docker_cmd} run -it --rm \
        ${docker_volume_opt} --entrypoint /bin/bash ${DOCKER_IMAGE} \
        lm "${DEBUG_OPT}" "${ENTRYPOINT_ARGS[@]}" "${docker_volume_arg}"
else 
    ${docker_cmd} run --rm --entrypoint /bin/bash ${DOCKER_IMAGE} lm --help
    echo -e "\nError: no command given." >&2
fi