pdftk docker container

Dockerfile

FROM ubuntu:16.04

MAINTAINER Michael Gerhaeuser <michael.gerhaeuser@gmail.com>

RUN mkdir /work
WORKDIR /work
VOLUME ["/work"]

RUN apt-get update
RUN apt-get install -y --no-install-recommends pdftk sudo

ENV USER_ID 1000
ENV GROUP_ID 1000

ADD ./entrypoint.sh /tmp/entrypoint.sh

ENTRYPOINT ["/tmp/entrypoint.sh"]

entrypoint.sh

#!/bin/sh

getent group "$GROUP_ID" >/dev/null 2>&1
if [ $? != 0 ]; then
    groupadd -g $GROUP_ID somegroup >/dev/null 2>&1
    usermod -a -G somegroup nobody >/dev/null 2>&1
fi

getent passwd "$USER_ID" >/dev/null 2>&1
if [ $? != 0 ]; then
    GROUP=$(getent group $GROUP_ID | cut -d: -f1)
    useradd -u $USER_ID -g $GROUP someuser >/dev/null 2>&1
fi

USER=$(getent passwd $USER_ID | cut -d: -f1)
sudo -u $USER pdftk "$@"

pdftk

#!/bin/sh

docker run -e USER_ID=`id -u` -e GROUP_ID=`id -g` -v $(pwd):/work --rm pdftk:latest "$@"