.ubuntu-18.04-ksh-93um

FROM buildpack-deps:18.04 as builder
ENV DEBIAN_FRONTEND=noninteractive DEBCONF_NOWARNINGS=yes
RUN apt-get update
WORKDIR /root
RUN git clone https://github.com/ksh93/ksh.git \
 && cd ksh \
 && bin/package make

FROM ubuntu:18.04
ENV DEBIAN_FRONTEND=noninteractive DEBCONF_NOWARNINGS=yes
RUN useradd -m user \
 && apt-get update
COPY --from=builder /root/ksh/arch/linux.i386-64/bin /usr/local/bin
ENV SH=/usr/local/bin/ksh