# Xenial is used here for broad compatibility
FROM ubuntu:xenial

RUN \
  echo "**** install build deps ****" && \
  apt-get update && \
  apt-get install -y \
    curl \
    gcc \
    libarchive-dev \
    libtalloc-dev && \
  echo "**** ingest proot src ****" && \
  mkdir /build && \
  PROOT_RELEASE=$(curl -sX GET "https://api.github.com/repos/proot-me/proot/releases/latest" \
    | awk '/tag_name/{print $4;exit}' FS='[""]') && \
  curl -L \
    "https://github.com/proot-me/proot/archive/${PROOT_RELEASE}.tar.gz" \
    | tar -xzf - -C "/build" --strip-components=1 && \
  echo "**** build logic ****" && \
  echo "#!/bin/bash" > /entrypoint && \
  echo "make -C src loader.elf loader-m32.elf build.h" >> /entrypoint && \
  echo "LDFLAGS=\"\${LDFLAGS} -static\" make -C src proot GIT=false" >> /entrypoint && \
  echo "strip src/proot" >> /entrypoint && \
  echo "mv src/proot /mnt/" >> /entrypoint && \
  chmod +x /entrypoint && \
  echo "**** cleanup ****" && \
  apt-get autoremove && \
  apt-get clean && \
  rm -rf \
    /tmp/* \
    /var/lib/apt/lists/* \
    /var/tmp/* \
    /var/log/*

WORKDIR /build

ENTRYPOINT ["/entrypoint"]