mmdebstrap/tests/root-mode-inside-unshare-chroot

#!/bin/sh
#
# Same as root-mode-inside-chroot but this time we run mmdebstrap in root mode
# from inside an unshare chroot.

set -eu
export LC_ALL=C.UTF-8

[ {{ MODE }} = "unshare" ]

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

cat <<'SCRIPT' >/tmp/script.sh
#!/bin/sh
set -eu
rootfs="$1"
mkdir -p "$rootfs/mnt"
[ -e /usr/bin/mmdebstrap ] && cp -aT /usr/bin/mmdebstrap "$rootfs/usr/bin/mmdebstrap"
[ -e ./mmdebstrap ] && cp -aT ./mmdebstrap "$rootfs/mnt/mmdebstrap"
chroot "$rootfs" env --chdir=/mnt \
	{{ CMD }} --mode=root --variant=apt \
	{{ DIST }} /tmp/debian-chroot.tar {{ MIRROR }}
SCRIPT
chmod +x /tmp/script.sh
$prefix {{ CMD }} --mode={{ MODE }} --variant=apt --include=perl,mount \
  --customize-hook=/tmp/script.sh \
  --customize-hook="download /tmp/debian-chroot.tar /tmp/debian-chroot.tar" \
  {{ DIST }} /dev/null {{ MIRROR }}
tar -tf /tmp/debian-chroot.tar | sort | diff -u tar1.txt -
rm /tmp/debian-chroot.tar /tmp/script.sh