#!/bin/sh set -eu export LC_ALL=C.UTF-8 export SOURCE_DATE_EPOCH={{ SOURCE_DATE_EPOCH }} 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 ${SUDO_USER:-user} --" fi # debootstrap uses apt-config to figure out whether the system running it has # any proxies configured and then runs the binary to set the http_proxy # environment variable. This will fail if debootstrap is run in a linux user # namespace because auto-apt-proxy will see /tmp/.auto-apt-proxy-0 as being # owned by the user "nobody" and group "nogroup" and fail with: # insecure cache dir /tmp/.auto-apt-proxy-0. Must be owned by UID 0 and have permissions 700 # We cannot overwrite a configuration item using the APT_CONFIG environment # variable, so instead we use it to set the Dir configuration option # to /dev/null to force all apt settings to their defaults. # There is currently no better way to disable this behavior. See also: # https://bugs.debian.org/1031105 # https://salsa.debian.org/installer-team/debootstrap/-/merge_requests/90 AUTOPROXY= eval "$(apt-config shell AUTOPROXY Acquire::http::Proxy-Auto-Detect)" if [ -n "$AUTOPROXY" ] && [ -x "$AUTOPROXY" ] && [ -e /tmp/.auto-apt-proxy-0 ]; then TMP_APT_CONFIG=$(mktemp) echo 'Dir "/dev/null";' >"$TMP_APT_CONFIG" chmod 644 "$TMP_APT_CONFIG" fi $prefix {{ CMD }} --variant=custom --mode={{ MODE }} \ --setup-hook='env '"${AUTOPROXY:+APT_CONFIG='$TMP_APT_CONFIG'}"' debootstrap --variant={{ VARIANT }} unstable "$1" {{ MIRROR }}' \ - /tmp/debian-mm.tar {{ MIRROR }} if [ -n "$AUTOPROXY" ] && [ -x "$AUTOPROXY" ] && [ -e /tmp/.auto-apt-proxy-0 ]; then rm "$TMP_APT_CONFIG" fi mkdir /tmp/debian-mm tar --xattrs --xattrs-include='*' -C /tmp/debian-mm -xf /tmp/debian-mm.tar mkdir /tmp/debian-debootstrap tar --xattrs --xattrs-include='*' -C /tmp/debian-debootstrap -xf "cache/debian-unstable-{{ VARIANT }}.tar" # diff cannot compare device nodes, so we use tar to do that for us and then # delete the directory tar -C /tmp/debian-debootstrap -cf dev1.tar ./dev tar -C /tmp/debian-mm -cf dev2.tar ./dev cmp dev1.tar dev2.tar >&2 rm dev1.tar dev2.tar rm -r /tmp/debian-debootstrap/dev /tmp/debian-mm/dev # remove downloaded deb packages rm /tmp/debian-debootstrap/var/cache/apt/archives/*.deb # remove aux-cache rm /tmp/debian-debootstrap/var/cache/ldconfig/aux-cache # remove logs rm /tmp/debian-debootstrap/var/log/dpkg.log \ /tmp/debian-debootstrap/var/log/bootstrap.log \ /tmp/debian-debootstrap/var/log/alternatives.log \ /tmp/debian-mm/var/log/bootstrap.log # clear out /run except for /run/lock find /tmp/debian-debootstrap/run/ -mindepth 1 -maxdepth 1 ! -name lock -print0 | xargs --no-run-if-empty -0 rm -r # debootstrap doesn't clean apt rm /tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_main_binary-{{ HOSTARCH }}_Packages \ /tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_InRelease \ /tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_Release \ /tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_Release.gpg if [ -e /tmp/debian-debootstrap/etc/machine-id ]; then rm /tmp/debian-debootstrap/etc/machine-id /tmp/debian-mm/etc/machine-id fi rm /tmp/debian-mm/var/cache/apt/archives/lock rm /tmp/debian-mm/var/lib/apt/lists/lock rm /tmp/debian-mm/var/lib/dpkg/arch # also needed for users that are created by systemd-sysusers before systemd 252 # https://github.com/systemd/systemd/pull/24534 for f in shadow shadow-; do if [ ! -e /tmp/debian-debootstrap/etc/$f ]; then continue fi if ! cmp /tmp/debian-debootstrap/etc/$f /tmp/debian-mm/etc/$f >&2; then echo patching /etc/$f >&2 awk -v FS=: -v OFS=: -v SDE={{ SOURCE_DATE_EPOCH }} '{ print $1,$2,int(SDE/60/60/24),$4,$5,$6,$7,$8,$9 }' /tmp/debian-mm/etc/$f.bak cat /tmp/debian-mm/etc/$f.bak >/tmp/debian-mm/etc/$f rm /tmp/debian-mm/etc/$f.bak else echo no difference for /etc/$f >&2 fi done # isc-dhcp-client postinst doesn't create this file in debootstrap run with # unshared wrapper. The responsible postinst snippet was automatically added # by dh_apparmor since isc-dhcp-client 4.4.3-P1-1.1 if [ -e /tmp/debian-debootstrap/etc/apparmor.d/local/sbin.dhclient ] && [ ! -s /tmp/debian-debootstrap/etc/apparmor.d/local/sbin.dhclient ]; then echo /sbin/setcap >/tmp/debian-debootstrap/etc/apparmor.d/local/sbin.dhclient fi # check if the file content differs diff --unified --no-dereference --recursive /tmp/debian-debootstrap /tmp/debian-mm >&2 # check permissions, ownership, symlink targets, modification times using tar # mtimes of directories created by mmdebstrap will differ, thus we equalize them first for d in etc/apt/preferences.d/ etc/apt/sources.list.d/ etc/dpkg/dpkg.cfg.d/ var/log/apt/; do touch --date="@{{ SOURCE_DATE_EPOCH }}" /tmp/debian-debootstrap/$d /tmp/debian-mm/$d done # debootstrap never ran apt -- fixing permissions for d in ./var/lib/apt/lists/partial ./var/cache/apt/archives/partial; do chroot /tmp/debian-debootstrap chmod 0700 $d chroot /tmp/debian-debootstrap chown _apt:root $d done tar -C /tmp/debian-debootstrap --numeric-owner --xattrs --xattrs-include='*' --sort=name --clamp-mtime --mtime="$(date --utc --date=@{{ SOURCE_DATE_EPOCH }} --iso-8601=seconds)" -cf /tmp/root1.tar . tar -C /tmp/debian-mm --numeric-owner --xattrs --xattrs-include='*' --sort=name --clamp-mtime --mtime="$(date --utc --date=@{{ SOURCE_DATE_EPOCH }} --iso-8601=seconds)" -cf /tmp/root2.tar . tar --full-time --verbose -tf /tmp/root1.tar >/tmp/root1.tar.list tar --full-time --verbose -tf /tmp/root2.tar >/tmp/root2.tar.list # despite SOURCE_DATE_EPOCH and --clamp-mtime, the timestamps in the tarball # will slightly differ from each other in the sub-second precision (last # decimals) so the tarballs will not be identical, so we use diff to compare # content and tar to compare attributes diff -u /tmp/root1.tar.list /tmp/root2.tar.list >&2 rm /tmp/root1.tar /tmp/root2.tar /tmp/root1.tar.list /tmp/root2.tar.list rm /tmp/debian-mm.tar rm -r /tmp/debian-debootstrap /tmp/debian-mm