1 #!/usr/bin/env sh
   2 # shellcheck disable=SC2046,SC2091
   3 #
   4 # https://wiki.debian.org/ReleaseCodenames
   5 RELEASES="bullseye bookworm trixie sid"
   6 
   7 set -e
   8 if [ -z "$CREATECHROOTS" ]; then
   9         echo "run export CREATECHROOTS=1 and try again"
  10         exit 1
  11 fi
  12 prefix=schroot
  13 if [ $# -eq 1 ]; then
  14         prefix=/"${1##/*}"
  15 fi
  16 zpool -V >/dev/null
  17 zfs -V >/dev/null
  18 
  19 # check if packages are installed
  20 # I don't use apt-cacher-ng on localhost.
  21 if ! dpkg-query -W sbuild schroot mmdebstrap auto-apt-proxy >/dev/null 2>&1; then
  22         sudo apt-get install schroot sbuild mmdebstrap auto-apt-proxy
  23 fi
  24 
  25 # put yourself to the sbuild group
  26 if ! $(getent group sbuild|grep -q "$USER"); then
  27         sudo sbuild-adduser "$USER"
  28         newgrp sbuild
  29 fi
  30 
  31 destroy() {
  32         if $(mount -l -t zfs|grep -q "$mountroot/$release"); then
  33                 sudo umount -vf "$mountroot/$release" || :
  34         fi
  35         if zfs list -H -o name "$dataset/$release"; then
  36                 sudo zfs destroy -rfv "$dataset/$release" || :
  37         fi
  38         if [ -d "$mountroot/$release" ]; then
  39                 sudo rm -Rfv "$mountroot/$release" || :
  40         fi
  41         if [ -L /etc/sbuild/chroot/"${configfile##*/}" ]; then
  42                 sudo rm /etc/sbuild/chroot/"${configfile##*/}"
  43         fi
  44 }
  45 undo() {
  46         [ $? -eq 0 ] && exit
  47         set -x
  48         destroy
  49         set +x
  50 }
  51 
  52 trap undo EXIT
  53 
  54 pool="rpool"
  55 base="$pool/srv/chroot"
  56 if ! zfs list -H -o name "$base">/dev/null; then
  57         echo "Basedataset must be created by you: $base"
  58         exit 1;
  59 fi
  60 dataset="$base/$prefix"
  61 if ! [ -d '/srv/chroot' ]; then echo "mountroot not available"; exit 1; fi
  62 mountroot=/srv/chroot/"$prefix"; sudo mkdir -p "$mountroot"
  63 if test -z $(zfs list -H -o name "$dataset"); then
  64         sudo zfs create -v "$dataset"
  65 fi
  66 # be able to make snapshots w/o sudo/root
  67 sudo zfs allow -s @schroot \
  68         allow,create,snapshot,destroy,rename,rollback,diff,clone,mount,promote,refreservation \
  69         "$dataset"
  70 sudo zfs allow "$USER" @schroot "$dataset"
  71 sudo chown "$USER":"$GROUP" "$mountroot"
  72 # shellcheck disable=SC2086
  73 set -- $RELEASES
  74 for release in "$@"; do
  75         configfile=
  76         # if dataset already exists
  77         if zfs list -H -o name "$dataset/$release">/dev/null; then
  78                 if [ -f /etc/schroot/chroot.d/"${prefix}_${release}" ]; then
  79                         if  schroot --list --chroot="${prefix}_${release}">/dev/null ; then
  80                                 continue
  81                         else
  82                                 destroy
  83                         fi
  84                 else
  85                         destroy
  86                 fi
  87         fi
  88         mkdir -vp "$mountroot/$release"
  89         sudo zfs create -v -o mountpoint=legacy -o atime=off "$dataset/$release"
  90         sudo mount -vt zfs "$dataset/$release" "$mountroot/$release"
  91         sudo chown -v "$USER":"$GROUP" "$mountroot/$release"
  92         mmdebstrap --variant=buildd --include=systemd-sysv,debhelper,eatmydata \
  93                 --aptopt='Acquire::http {Proxy "'$(auto-apt-proxy)'"; }' \
  94                 --mode=unshare "$release" "$mountroot/$release"
  95         sudo umount -v "$mountroot/$release"
  96         alias="$release"
  97         if dpkg-query -W distro-info >/dev/null 2>&1; then
  98                 alias="$alias,$(distro-info --alias="$release")"
  99         fi
 100         configfile=/etc/schroot/chroot.d/"${prefix}"_"${release}"
 101         cat << EOF |sudo tee "$configfile" >/dev/null
 102 ################################################################################
 103 ##${configfile}
 104 ################################################################################
 105 [${configfile##*/}]
 106 type=zfs-snapshot
 107 description=Debian ${configfile##*/} ZFS snapshot
 108 groups=sbuild,root
 109 root-users=$USER
 110 root-groups=root,sbuild
 111 source-root-users=$USER
 112 source-clone=true
 113 zfs-dataset=$dataset/$release
 114 mount-options=-o atime=off,sync=disabled
 115 zfs-snapshot-options=
 116 command-prefix=eatmydata
 117 aliases=$alias
 118 EOF
 119 sudo ln -sfv "$configfile" /etc/sbuild/chroot/"${configfile##*/}"
 120 done
 121 schroot --list --all-chroots