mmdebstrap/tests/chrootless-fakeroot

#!/bin/sh
set -eu
export LC_ALL=C.UTF-8
export SOURCE_DATE_EPOCH={{ SOURCE_DATE_EPOCH }}
trap "rm -f /tmp/chrootless.tar /tmp/root.tar" EXIT INT TERM

[ {{ MODE }} = chrootless ]

prefix=
if [ "$(id -u)" -eq 0 ] && [ "{{ MODE }}" != "root" ] && [ "{{ MODE }}" != "auto" ]; then
  if ! id "${SUDO_USER:-user}" >/dev/null 2>&1; then
    if [ ! -e /mmdebstrap-testenv ]; then
      echo "this test modifies the system and should only be run inside a container" >&2
      exit 1
    fi
    useradd --home-dir "/home/${SUDO_USER:-user}" --create-home "${SUDO_USER:-user}"
  fi
  prefix="runuser -u ${SUDO_USER:-user} --"
fi

MMTARFILTER=
[ -x /usr/bin/mmtarfilter ] && MMTARFILTER=/usr/bin/mmtarfilter
[ -x ./tarfilter ] && MMTARFILTER=./tarfilter

# we need --hook-dir=./hooks/merged-usr because usrmerge does not understand
# DPKG_ROOT
# permissions drwxr-sr-x and extended attributes of ./var/log/journal/ cannot
# be preserved under fakeroot
# this applies to 'z' lines in files in /usr/lib/tmpfiles.d/
for INCLUDE in '' 'apt' 'apt,build-essential' 'systemd-sysv'; do
  {{ CMD }} --variant={{ VARIANT }} --hook-dir=./hooks/merged-usr \
    ${INCLUDE:+--include="$INCLUDE"} \
    {{ DIST }} - {{ MIRROR }} \
    | "$MMTARFILTER" --path-exclude="/var/log/journal" --path-exclude="/etc/credstore*" \
      >/tmp/root.tar
  $prefix fakeroot {{ CMD }} --mode={{ MODE }} --variant={{ VARIANT }} --hook-dir=./hooks/merged-usr \
    ${INCLUDE:+--include="$INCLUDE"} \
    {{ DIST }} - {{ MIRROR }} \
    | "$MMTARFILTER" --path-exclude="/var/log/journal" --path-exclude="/etc/credstore*" \
      >/tmp/chrootless.tar
  cmp /tmp/root.tar /tmp/chrootless.tar || diffoscope /tmp/root.tar /tmp/chrootless.tar
  rm /tmp/chrootless.tar /tmp/root.tar
done