ARG PYTHONTAG=3.11.10-slim-bookworm
FROM docker.io/python:${PYTHONTAG} AS base-upstream

FROM base-upstream AS base-intermediate
SHELL [ "/bin/sh", "-ec" ]

COPY /Dockerfile.base  /usr/local/share/

COPY /scripts/*        /usr/local/sbin/
COPY /extra-scripts/*  /usr/local/sbin/

## PATH: remove /sbin and /bin (/usr is merged)
ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin \
    TMPDIR=/tmp \
    LANG=C.UTF-8 \
    LC_ALL=C.UTF-8 \
    TERM=linux \
    TZ=Etc/UTC \
    MALLOC_ARENA_MAX=2 \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1

## local development
# ENV PIP_INDEX="http://127.0.0.1:8081/repository/proxy_pypi/pypi/" \
#     PIP_INDEX_URL="http://127.0.0.1:8081/repository/proxy_pypi/simple/" \
#     PIP_TRUSTED_HOST="localhost"

COPY /apt/preferences.backports  /etc/apt/preferences.d/backports
COPY /apt/sources.debian         /etc/apt/sources.list.d/debian.sources

## prevent services from auto-starting, part 1
RUN s='/usr/sbin/policy-rc.d' ; b='/usr/bin/policy-rc.d' ; \
    rm -f "$s" "$b" ; \
    echo '#!/bin/sh' > "$b" ; \
    echo 'exit 101' >> "$b" ; \
    chmod 0755 "$b" ; \
    ln -s "$b" "$s"

RUN divert_true() { divert-rm.sh "$1" ; ln -sv /bin/true "$1" ; } ; \
    ## prevent services from auto-starting, part 2
    divert_true /sbin/start-stop-daemon ; \
    ## always report that we're in chroot
    divert_true /usr/bin/ischroot ; \
    ## hide systemd helpers
    divert_true /usr/bin/deb-systemd-helper ; \
    divert_true /usr/bin/deb-systemd-invoke

RUN apt-env.sh apt-get update ; \
    apt-remove.sh \
      ca-certificates \
      e2fsprogs \
    ; \
    apt-env.sh apt-get upgrade -y ; \
    apt-install.sh \
      brotli \
      cron \
      curl \
      dumb-init \
      file \
      gettext-base \
      gnupg \
      iproute2 \
      iputils-ping \
      jdupes \
      jq \
      less \
      libnss-wrapper \
      logrotate \
      lsof \
      ncurses-base \
      netbase \
      netcat-openbsd \
      openssl \
      procps \
      psmisc \
      tzdata \
      vim \
      xxd \
      xz-utils \
      zstd \
    ; \
    apt-clean.sh

## perl-base: hardlink->symlink
RUN d=/usr/bin ; \
    find "$d/" -wholename "$d/perl5*" -exec ln -fsv perl {} ';' ; \
    ls -li "$d/perl"*

## remove unwanted binaries
RUN set -f ; \
    for i in \
      addpart \
      apt-ftparchive \
      agetty \
      badblocks \
      blkdiscard \
      blkid \
      blkzone \
      blockdev \
      bsd-write \
      chage \
      chcpu \
      chfn \
      chgpasswd \
      chmem \
      chpasswd \
      chsh \
      cpgr \
      cppw \
      crontab \
      ctrlaltdel \
      debugfs \
      delpart \
      dmesg \
      dumpe2fs \
      e2freefrag \
      e2fsck \
      e2image \
      e2label \
      e2mmpstatus \
      e2scrub \
     'e2scrub*' \
      e2undo \
      e4crypt \
      e4defrag \
      expiry \
      faillock \
      fdformat \
      fincore \
      findfs \
      fsck \
     'fsck.*' \
      fsfreeze \
      fstrim \
      getty \
      gpasswd \
      groupmems \
      grpck \
      grpconv \
      grpunconv \
      hwclock \
      isosize \
      last \
      lastb \
      ldattach \
      losetup \
      lsblk \
      lsirq \
      lslogins \
      mcookie \
      mesg \
      mke2fs \
      mkfs \
     'mkfs.*' \
      mkhomedir_helper \
      mklost+found \
      mkswap \
      mount \
      newgrp \
      newusers \
      pam-auth-update \
      pam_getenv \
      pam_namespace_helper \
      pam_timestamp_check \
      partx \
      pivot_root \
      pwck \
      pwconv \
      pwhistory_helper \
      pwunconv \
      raw \
      readprofile \
      resize2fs \
      resizepart \
      rtcwake \
      sg \
      shadowconfig \
      sulogin \
      swaplabel \
      swapoff \
      swapon \
      switch_root \
      tune2fs \
      umount \
      unix_chkpwd \
      unix_update \
      utmpdump \
      vigr \
      vipw \
      wall \
      wdctl \
      wipefs \
      write \
     'write.*' \
      zramctl \
    ; do \
        for d in /usr/sbin /usr/bin /sbin /bin ; do \
            find "$d/" ! -type d -wholename "$d/$i" \
            | while read -r p ; do \
                [ -n "$p" ] || continue ; \
                [ -e "$p" ] || continue ; \
                dpkg -S "$p" >/dev/null 2>&1 || continue ; \
                divert-rm.sh "$p" ; \
            done ; \
        done ; \
        for d in /usr/sbin /usr/bin /sbin /bin ; do \
            find "$d/" ! -type d -wholename "$d/$i" \
            | while read -r p ; do \
                [ -n "$p" ] || continue ; \
                [ -e "$p" ] || continue ; \
                rm -fv "$p" ; \
            done ; \
        done ; \
    done ; \
    ## fixup
    rm -f \
      /bin/lastb \
      /bin/sg \
      /sbin/getty \
    ; :

## remove excessive privileges from binaries
RUN set -f ; \
    for i in \
      passwd \
      su \
    ; do \
        for d in /usr/sbin /usr/bin /sbin /bin ; do \
            find "$d/" ! -type d -wholename "$d/$i" \
            | while read -r p ; do \
                [ -n "$p" ] || continue ; \
                [ -e "$p" ] || continue ; \
                dpkg -S "$p" >/dev/null 2>&1 || continue ; \
                o=$(env stat -c '%U' "$p") ; \
                g=$(env stat -c '%G' "$p") ; \
                ls -l "$p" ; \
                dpkg-statoverride --update --add "$o" "$g" 0755 "$p" ; \
                ls -l "$p" ; \
                done ; \
        done ; \
    done

## "docker.io/python"-specific cleanup
RUN rm -f /root/.wget-hsts

RUN pip-env.sh pip list --format freeze \
    | grep -F '==' | awk -F= '{print $1}' \
    | xargs -r pip-env.sh pip install -U ; \
    python-rm-cache.sh "${PYTHON_SITE_PACKAGES}"

RUN libpython="${PYTHON_SITE_PACKAGES%/*}" ; \
    rm -rfv \
      /usr/local/bin/idle* \
      /usr/local/bin/pydoc* \
      "${libpython}/ensurepip/_bundled" \
      "${libpython}/idlelib" \
      "${libpython}/pydoc.py" \
      "${libpython}/pydoc_data" \
      "${libpython}/tkinter" \
      "${libpython}/turtle.py" \
      "${libpython}/turtledemo" \
    ; \
    rm -rfv \
      "${PYTHON_SITE_PACKAGES}/pkg_resources/tests" \
      "${PYTHON_SITE_PACKAGES}/setuptools/tests" \
      "${PYTHON_SITE_PACKAGES}/setuptools/_distutils/tests" \
      "${PYTHON_SITE_PACKAGES}/setuptools/_vendor/importlib_resources/tests" \
    ; \
    find "${PYTHON_SITE_PACKAGES}/" -iname '*.exe' -ls -delete ; \
    python-rm-cache.sh /usr/local

## adjust pip/certifi
RUN certifi_pem="${PYTHON_SITE_PACKAGES}/pip/_vendor/certifi/cacert.pem" ; \
    rm -f "${certifi_pem}" ; \
    ln -s /etc/ssl/certs/ca-certificates.crt "${certifi_pem}"

RUN find /usr/local/sbin/ ! -type d -ls -delete ; \
    find /run/ -mindepth 1 -ls -delete || : ; \
    install -d -m 01777 /run/lock ; \
    jdupes -1LSpr /usr/

## ---

FROM base-intermediate AS certs
SHELL [ "/bin/sh", "-ec" ]

COPY /scripts/*        /usr/local/sbin/
COPY /extra-scripts/*  /usr/local/sbin/

## "2024.08.30"
ENV CERTIFI_COMMIT=325c2fde4f8eec10d682b09f3b0414dc05e69a81

# 'https://raw.githubusercontent.com/certifi/python-certifi'
ARG CERTIFI_BASE_URI='https://github.com/certifi/python-certifi/raw'

ARG CERTIFI_URI="${CERTIFI_BASE_URI}/${CERTIFI_COMMIT}/certifi/cacert.pem"
ADD "${CERTIFI_URI}" /tmp/certifi.crt

RUN apt-install.sh ca-certificates ; \
    apt-clean.sh ; \
    ca_file='/etc/ssl/certs/ca-certificates.crt' ; \
    ls -l "${ca_file}" ; \
    ## process certifi
    certifi-extras.sh /tmp/certifi.crt ; \
    openssl-cert-auto-pem.sh "${ca_file}" "${ca_file}.new" "${ca_file}.fp" ; \
    mv -f "${ca_file}.new" "${ca_file}" ; \
    chmod 0444 "${ca_file}" "${ca_file}.fp" ; \
    ls -l "${ca_file}" "${ca_file}.fp"

## ---

FROM base-intermediate AS apt-gpg
SHELL [ "/bin/sh", "-ec" ]

COPY /scripts/*        /usr/local/sbin/
COPY /extra-scripts/*  /usr/local/sbin/

COPY --from=certs  /etc/ssl/certs/ca-certificates.*  /etc/ssl/certs/

ADD https://apt.postgresql.org/pub/repos/apt/ACCC4CF8.asc  /tmp/pgdg.gpg.bin
ADD https://packagecloud.io/citusdata/community/gpgkey     /tmp/citus.gpg.bin

## process GPG keyrings
RUN pkg='gnupg' ; \
    apt-install.sh ${pkg} ; \
    gpg-export.sh /tmp/pgdg.gpg.bin /etc/apt/keyrings/pgdg.gpg.asc ; \
    gpg-export.sh /tmp/citus.gpg.bin /etc/apt/keyrings/citus.gpg.asc ; \
    apt-remove.sh ${pkg}

COPY /apt/sources.pgdg   /etc/apt/sources.list.d/pgdg.sources
COPY /apt/sources.citus  /etc/apt/sources.list.d/citus.sources

## verify sources!
RUN apt-env.sh apt-get update ; \
    apt-clean.sh

## ---

FROM base-intermediate AS base

COPY --from=certs    /etc/ssl/certs/ca-certificates.*  /etc/ssl/certs/
COPY --from=apt-gpg  /etc/apt/keyrings/                /etc/apt/keyrings/

ENTRYPOINT [ ]
CMD [ "bash" ]