forked from josch/mmdebstrap
140 lines
6.7 KiB
Bash
140 lines
6.7 KiB
Bash
#!/bin/sh
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set -eu
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export LC_ALL=C.UTF-8
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export SOURCE_DATE_EPOCH={{ SOURCE_DATE_EPOCH }}
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prefix=
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if [ "$(id -u)" -eq 0 ] && [ "{{ MODE }}" != "root" ] && [ "{{ MODE }}" != "auto" ]; then
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if ! id "${SUDO_USER:-user}" >/dev/null 2>&1; then
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if [ ! -e /mmdebstrap-testenv ]; then
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echo "this test modifies the system and should only be run inside a container" >&2
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exit 1
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fi
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useradd --home-dir "/home/${SUDO_USER:-user}" --create-home "${SUDO_USER:-user}"
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fi
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prefix="runuser -u ${SUDO_USER:-user} --"
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fi
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# debootstrap uses apt-config to figure out whether the system running it has
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# any proxies configured and then runs the binary to set the http_proxy
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# environment variable. This will fail if debootstrap is run in a linux user
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# namespace because auto-apt-proxy will see /tmp/.auto-apt-proxy-0 as being
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# owned by the user "nobody" and group "nogroup" and fail with:
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# insecure cache dir /tmp/.auto-apt-proxy-0. Must be owned by UID 0 and have permissions 700
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# We cannot overwrite a configuration item using the APT_CONFIG environment
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# variable, so instead we use it to set the Dir configuration option
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# to /dev/null to force all apt settings to their defaults.
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# There is currently no better way to disable this behavior. See also:
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# https://bugs.debian.org/1031105
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# https://salsa.debian.org/installer-team/debootstrap/-/merge_requests/90
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AUTOPROXY=
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eval "$(apt-config shell AUTOPROXY Acquire::http::Proxy-Auto-Detect)"
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if [ -n "$AUTOPROXY" ] && [ -x "$AUTOPROXY" ] && [ -e /tmp/.auto-apt-proxy-0 ]; then
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TMP_APT_CONFIG=$(mktemp)
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echo "Dir \"/dev/null\";" > "$TMP_APT_CONFIG"
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chmod 644 "$TMP_APT_CONFIG"
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fi
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# debootstrap runs mount -t proc proc /proc which doesn't work in an unshared
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# namespace on privileged docker (like salsaci), so mount /proc manually
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# https://bugs.debian.org/1031222
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# https://salsa.debian.org/installer-team/debootstrap/-/merge_requests/91
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$prefix {{ CMD }} --variant=custom --mode={{ MODE }} \
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--setup-hook='env '"${AUTOPROXY:+APT_CONFIG='$TMP_APT_CONFIG'}"' container=lxc debootstrap --variant={{ VARIANT }} unstable "$1" {{ MIRROR }}' \
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--setup-hook='mount -o rbind /proc "$1/proc"' \
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--setup-hook='chroot "$1" dpkg-reconfigure systemd || true' \
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--setup-hook='umount --lazy "$1/proc"' \
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- /tmp/debian-mm.tar {{ MIRROR }}
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if [ -n "$AUTOPROXY" ] && [ -x "$AUTOPROXY" ] && [ -e /tmp/.auto-apt-proxy-0 ]; then
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rm "$TMP_APT_CONFIG"
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fi
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mkdir /tmp/debian-mm
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tar --xattrs --xattrs-include='*' -C /tmp/debian-mm -xf /tmp/debian-mm.tar
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mkdir /tmp/debian-debootstrap
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tar --xattrs --xattrs-include='*' -C /tmp/debian-debootstrap -xf "cache/debian-unstable-{{ VARIANT }}.tar"
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# diff cannot compare device nodes, so we use tar to do that for us and then
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# delete the directory
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tar -C /tmp/debian-debootstrap -cf dev1.tar ./dev
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tar -C /tmp/debian-mm -cf dev2.tar ./dev
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cmp dev1.tar dev2.tar >&2
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rm dev1.tar dev2.tar
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rm -r /tmp/debian-debootstrap/dev /tmp/debian-mm/dev
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# remove downloaded deb packages
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rm /tmp/debian-debootstrap/var/cache/apt/archives/*.deb
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# remove aux-cache
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rm /tmp/debian-debootstrap/var/cache/ldconfig/aux-cache
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# remove logs
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rm /tmp/debian-debootstrap/var/log/dpkg.log \
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/tmp/debian-debootstrap/var/log/bootstrap.log \
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/tmp/debian-debootstrap/var/log/alternatives.log \
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/tmp/debian-mm/var/log/bootstrap.log
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# clear out /run except for /run/lock
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find /tmp/debian-debootstrap/run/ -mindepth 1 -maxdepth 1 ! -name lock -print0 | xargs --no-run-if-empty -0 rm -r
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# debootstrap doesn't clean apt
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rm /tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_main_binary-{{ HOSTARCH }}_Packages \
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/tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_Release \
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/tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_Release.gpg
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if [ -e /tmp/debian-debootstrap/etc/machine-id ]; then
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rm /tmp/debian-debootstrap/etc/machine-id /tmp/debian-mm/etc/machine-id
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fi
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rm /tmp/debian-mm/var/cache/apt/archives/lock
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rm /tmp/debian-mm/var/lib/apt/lists/lock
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rm /tmp/debian-mm/var/lib/dpkg/arch
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# workaround for https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=917773
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# also needed for users that are created by systemd-sysusers before systemd 252
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# https://github.com/systemd/systemd/pull/24534
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for f in shadow shadow-; do
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if [ ! -e /tmp/debian-debootstrap/etc/$f ]; then
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continue
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fi
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if ! cmp /tmp/debian-debootstrap/etc/$f /tmp/debian-mm/etc/$f >&2; then
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echo patching /etc/$f >&2
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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 > /tmp/debian-mm/etc/$f.bak
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cat /tmp/debian-mm/etc/$f.bak > /tmp/debian-mm/etc/$f
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rm /tmp/debian-mm/etc/$f.bak
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else
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echo no difference for /etc/$f >&2
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fi
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done
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# isc-dhcp-client postinst doesn't create this file in debootstrap run with
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# unshared wrapper. The responsible postinst snippet was automatically added
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# by dh_apparmor since isc-dhcp-client 4.4.3-P1-1.1
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if [ -e /tmp/debian-debootstrap/etc/apparmor.d/local/sbin.dhclient ] && [ ! -s /tmp/debian-debootstrap/etc/apparmor.d/local/sbin.dhclient ]; then
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echo /sbin/setcap > /tmp/debian-debootstrap/etc/apparmor.d/local/sbin.dhclient
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fi
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# check if the file content differs
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diff --unified --no-dereference --recursive /tmp/debian-debootstrap /tmp/debian-mm >&2
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# check permissions, ownership, symlink targets, modification times using tar
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# mtimes of directories created by mmdebstrap will differ, thus we equalize them first
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for d in etc/apt/preferences.d/ etc/apt/sources.list.d/ etc/dpkg/dpkg.cfg.d/ var/log/apt/; do
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touch --date="@{{ SOURCE_DATE_EPOCH }}" /tmp/debian-debootstrap/$d /tmp/debian-mm/$d
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done
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# debootstrap never ran apt -- fixing permissions
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for d in ./var/lib/apt/lists/partial ./var/cache/apt/archives/partial; do
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chroot /tmp/debian-debootstrap chmod 0700 $d
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chroot /tmp/debian-debootstrap chown _apt:root $d
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done
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tar -C /tmp/debian-debootstrap --numeric-owner --xattrs --xattrs-include='*' --sort=name --clamp-mtime --mtime="$(date --utc --date=@{{ SOURCE_DATE_EPOCH }} --iso-8601=seconds)" -cf /tmp/root1.tar .
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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 .
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tar --full-time --verbose -tf /tmp/root1.tar > /tmp/root1.tar.list
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tar --full-time --verbose -tf /tmp/root2.tar > /tmp/root2.tar.list
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# despite SOURCE_DATE_EPOCH and --clamp-mtime, the timestamps in the tarball
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# will slightly differ from each other in the sub-second precision (last
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# decimals) so the tarballs will not be identical, so we use diff to compare
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# content and tar to compare attributes
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diff -u /tmp/root1.tar.list /tmp/root2.tar.list >&2
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rm /tmp/root1.tar /tmp/root2.tar /tmp/root1.tar.list /tmp/root2.tar.list
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rm /tmp/debian-mm.tar
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rm -r /tmp/debian-debootstrap /tmp/debian-mm
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