A very simple docker image to use unoconv easily

Dockerfile

FROM ubuntu:xenial

RUN \
    apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get install -y unoconv && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/

# Get latest unoconv script and hack it to use python3.
# (it fixes an issue about unoconv listener failing first time with libreoffice).
# Reference: https://github.com/dagwieers/unoconv/pull/327
ADD https://raw.githubusercontent.com/dagwieers/unoconv/master/unoconv /usr/bin/unoconv
RUN \
    chmod +xr /usr/bin/unoconv && \
    sed -i 's/env python$/env python3/' /usr/bin/unoconv

# Create the /tmp/in and /tmp/out to be used as volumes for sharing
RUN \
    mkdir -p /tmp/in && \
    mkdir -p /tmp/out

ENTRYPOINT [ "/usr/bin/unoconv" ]
CMD [ "--help" ]

wrapper.sh

#!/usr/bin/env bash
execparams=
outputpath=
inputpath=
while getopts ":f:o:-:" opt; do
    case $opt in
        -)
            execparams+="--"
            execparams+=$OPTARG
            execparams+=" "
            ;;
        f)
            execparams+="-f "
            execparams+=$OPTARG
            execparams+=" "
            ;;
        o)
            # Get output path
            outputpath=$(dirname $(readlink -f $OPTARG))
            execparams+="-o "
            execparams+="/tmp/out/"
            execparams+=$(basename $OPTARG)
            execparams+=" "
            ;;
        \?)
            execparams+="-"
            execparams+=$OPTARG
            execparams+=" "
            ;;
    esac
done

shift $((OPTIND-1))
[ "$1" = "--" ] && shift
# Get input path
if [[ -n $1 ]]; then
    inputpath=$(dirname $(readlink -f $1))
    execparams+="/tmp/in/"
    execparams+=$(basename $1)
    execparams+=" "
fi
execparams=${execparams%% }
if [[ -n $outputpath ]] && [[ -n $inputpath ]]; then
    docker run \
        -v $outputpath:/tmp/out \
        -v $inputpath:/tmp/in \
        moodle-docker_images/unoconv $execparams
else
    docker run \
        moodle-docker_images/unoconv $execparams
fi
execparams=${execparams%% }