mmdebstrap/tests/chrootless-foreign

#!/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
if [ ! -e /mmdebstrap-testenv ]; then
  echo "this test modifies the system and should only be run inside a container" >&2
  exit 1
fi

deb2qemu() {
  case "$1" in
    amd64) echo x86_64 ;;
    arm64) echo aarch64 ;;
    armel | armhf) echo arm ;;
    ppc64el) echo ppc64le ;;
    *) echo "$1" ;;
  esac
}
if [ "$(dpkg --print-architecture)" = "arm64" ]; then
  arch=amd64
else
  arch=arm64
fi

[ "$(id -u)" -eq 0 ]
[ -e "/proc/sys/fs/binfmt_misc/qemu-$(deb2qemu "$arch")" ]

# we need --hook-dir=./hooks/merged-usr because usrmerge does not understand
# DPKG_ROOT
#
# dpkg is unable to install architecture arch:all packages with a
# dependency on an arch:any package (perl-modules-5.34 in this case)
# inside foreign architecture chrootless chroots, because dpkg will use
# its own architecture as the native architecture, see #825385 and #1020533
# So we are not testing the installation of apt,build-essential here.
for INCLUDE in '' 'apt' 'systemd-sysv'; do
  echo 1 >"/proc/sys/fs/binfmt_misc/qemu-$(deb2qemu "$arch")"
  arch-test "$arch"
  {{ CMD }} --mode=root --architecture="$arch" --variant={{ VARIANT }} \
    --hook-dir=./hooks/merged-usr ${INCLUDE:+--include="$INCLUDE"} \
    {{ DIST }} "/tmp/root.tar" {{ MIRROR }}
  echo 0 >"/proc/sys/fs/binfmt_misc/qemu-$(deb2qemu "$arch")"
  arch-test "$arch" && exit 1
  {{ CMD }} --mode=chrootless --architecture="$arch" --variant={{ VARIANT }} \
    --hook-dir=./hooks/merged-usr ${INCLUDE:+--include="$INCLUDE"} \
    --skip=check/chrootless {{ DIST }} "/tmp/chrootless.tar" {{ MIRROR }}
  # when creating a foreign architecture chroot, the tarballs are not
  # bit-by-bit identical but contain a few remaining differences:
  #
  #  * /etc/ld.so.cache -- hard problem, must be solved in glibc upstream
  #  * /var/lib/dpkg/triggers -- #990712
  #  * /var/cache/debconf/*.dat-old -- needs investigation
  for tar in root chrootless; do
    ./tarfilter <"/tmp/$tar.tar" \
      --path-exclude=/var/cache/debconf/config.dat-old \
      --path-exclude=/var/cache/debconf/templates.dat-old \
      --path-exclude=/etc/ld.so.cache \
      --path-exclude=/var/lib/dpkg/triggers/File \
      --path-exclude=/var/lib/dpkg/triggers/ldconfig \
      >"/tmp/$tar.tar.tmp"
    mv "/tmp/$tar.tar.tmp" "/tmp/$tar.tar"
  done
  cmp /tmp/root.tar /tmp/chrootless.tar || diffoscope /tmp/root.tar /tmp/chrootless.tar
  rm /tmp/chrootless.tar /tmp/root.tar
done