mdw@git.distorted.org.uk Git - distorted-chroot/blob - bin/mkbuildchroot

   1 #! /bin/sh -e
   2 ###
   3 ### Construct a fresh build-chroot base
   4 ###
   5 ### (c) 2018 Mark Wooding
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of the distorted.org.uk chroot maintenance tools.
  11 ###
  12 ### distorted-chroot is free software: you can redistribute it and/or
  13 ### modify it under the terms of the GNU General Public License as
  14 ### published by the Free Software Foundation; either version 2 of the
  15 ### License, or (at your option) any later version.
  16 ###
  17 ### distorted-chroot is distributed in the hope that it will be useful,
  18 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 ### General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU General Public License
  23 ### along with distorted-chroot.  If not, write to the Free Software
  24 ### Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  25 ### USA.
  26
  27 . state/config.sh # @@@config@@@
  28
  29 ## Convert the PROXY configuration setting into something that will affect
  30 ## `debootstrap'.
  31 case $PROXY in nil) ;; *) http_proxy=$PROXY; export PROXY ;; esac
  32
  33 ## Parse the command-line.
  34 badp=nil forcep=nil
  35 while getopts "f" opt; do
  36   case $opt in
  37     f) forcep=t ;;
  38     *) badp=t ;;
  39   esac
  40 done
  41 shift $(( $OPTIND - 1 ))
  42 case $# in 2) ;; *) badp=t ;; esac
  43 case $badp in t) echo >&2 "usage: $0 [-f] DIST ARCH"; exit 2 ;; esac
  44 d=$1 a=$2
  45
  46 case $d-$a in *-*-*) echo >&2 "$0: bad chroot name \`$arg'"; exit 2 ;; esac
  47 if [ ! -d /dev/$VG/ ]; then echo >&2 "$0: no volume group \`$VG'"; exit 2; fi
  48
  49 ## Decide whether we need to do special things for installing a foreign
  50 ## architecture.
  51 qemup=nil dbsopts=
  52 for fa in $FOREIGN_ARCHS; do
  53   case $fa in
  54     "$a")
  55       qemup=t dbsopts=--foreign
  56       eval qarch=\$${a}_QEMUARCH qhost=\$${a}_QEMUHOST
  57       break
  58       ;;
  59   esac
  60 done
  61
  62 ## Construct the logical volume and lay a filesystem onto it.
  63 lv=$LVPREFIX$d-$a
  64 mnt=$HERE/mnt/$lv
  65 mkdir -p $mnt
  66 if mountpoint -q $mnt; then umount $mnt; fi
  67 if [ -b /dev/$VG/$lv ]; then
  68   case $forcep in
  69     nil) echo >&2 "$0: volume \`$lv' already exists"; exit 2 ;;
  70     t) lvremove -f $VG/$lv ;;
  71   esac
  72 fi
  73 lvcreate --yes $LVSZ -n$lv $VG
  74 mkfs -j -L$d-$a /dev/$VG/$lv
  75 mount -orelatime,data=writeback,commit=3600,barrier=0 /dev/$VG/$lv $mnt/
  76 mkdir -m755 $mnt/fs/
  77 chmod 750 $mnt/
  78
  79 ## Install the base system.
  80 want=$BASE_PACKAGES
  81 case $qemup in
  82   t) want="$want $FOREIGN_BASE_PACKAGES" ;;
  83   nil) want="$want $NATIVE_BASE_PACKAGES" ;;
  84 esac
  85 pkgs=; for p in $want; do pkgs=${pkgs:+$pkgs,}$p; done
  86 eatmydata debootstrap $dbsopts --arch=$a --variant=minbase \
  87           --include=$pkgs $d $mnt/fs/ $DEBMIRROR
  88
  89 ## If this is a cross-installation, then install the necessary `qemu' and
  90 ## complete the installation.
  91 case $qemup in
  92   t)
  93     install $LOCAL/cross/$d-$qhost/QEMU/qemu-$qarch-static \
  94             $mnt/fs/usr/bin/
  95     chroot $mnt/fs/ /debootstrap/debootstrap --second-stage
  96     ln -sf /usr/local.schroot/cross/$d-$qhost/QEMU/qemu-$qarch-static \
  97        $mnt/fs/usr/bin/
  98     ;;
  99 esac
 100
 101 ## Set up `/usr/local'.
 102 rm -rf $mnt/fs/usr/local/; ln -s local.schroot/$a $mnt/fs/usr/local
 103
 104 ## Install the `apt' configuration.
 105 rm -rf $mnt/fs/etc/apt/apt.conf $mnt/fs/etc/apt/sources.list
 106 for c in $LOCAL/etc/apt/apt.conf.d/*; do
 107   ln -s /usr/local.schroot/${c#$LOCAL/} $mnt/fs/etc/apt/apt.conf.d/
 108 done
 109 ln -s /usr/local.schroot/etc/apt/sources.$d $mnt/fs/etc/apt/sources.list
 110
 111 cat >$mnt/fs/etc/apt/apt.conf.d/20arch <<EOF
 112 ### -*-conf-*-
 113
 114 APT {
 115         Architecture "$a";
 116 };
 117 EOF
 118
 119 ## Set up the locale and time zone from the host system.
 120 cp /etc/locale.gen /etc/timezone $mnt/fs/etc/
 121 tz=$(cat /etc/timezone); ln -sf /usr/share/zoneinfo/$tz $mnt/fs/etc/localtime
 122 ln -sf /proc/mounts $mnt/fs/etc/mtab
 123
 124 cp /etc/default/locale $mnt/fs/etc/default/
 125
 126 ## Prevent daemons from starting within the chroot.
 127 cat >$mnt/fs/usr/sbin/policy-rc.d <<EOF
 128 #! /bin/sh
 129 echo >&2 "policy-rc.d: Services disabled by policy."
 130 exit 101
 131 EOF
 132 chmod +x $mnt/fs/usr/sbin/policy-rc.d
 133
 134 ## Hack the dynamic linker to prefer libraries in `/usr' over `/usr/local'.
 135 cat >$mnt/fs/etc/ld.so.conf.d/libc.conf <<EOF
 136 # libc default configuration
 137 EOF
 138 cat >$mnt/fs/etc/ld.so.conf.d/zzz-local.conf <<EOF
 139 ### -*-conf-*-
 140 ### Local hack to make /usr/local/ late.
 141 /usr/local/lib
 142 EOF
 143
 144 ## We're done setting the chroot environment up.
 145 umount $mnt/
 146
 147 ## If this is a foreign architecture then we need to set it up.
 148 case $qemup in
 149   t)
 150     ## Keep the chroot's native Qemu out of our way: otherwise we'll stop
 151     ## being able to run programs in the chroot.  There's a hack here because
 152     ## the `--no-rename' option was required in the same version in which is
 153     ## was introduced, so there's no single incantation that will work across
 154     ## the boundary.
 155     schroot -uroot -csource:$LVPREFIX$d-$a -- eatmydata sh -e -c "
 156         if dpkg-divert >/dev/null 2>&1 --no-rename --help
 157         then no_rename=--no-rename
 158         else no_rename=
 159         fi
 160
 161         dpkg-divert --package install-cross-tools \$no_rename \
 162           --divert /usr/bin/qemu-$qarch-static.$a --add /usr/bin/qemu-$qarch-static"
 163
 164     ## Install faster native tools.
 165     $STATE/bin/install-cross-tools $d $a
 166
 167     ## Install `build-essential', which had been delayed from earlier.
 168     schroot -uroot -csource:$LVPREFIX$d-$a -- \
 169             eatmydata apt-get -y install build-essential
 170     ;;
 171 esac
 172
 173 ## Set the chroot's package state up properly.
 174 schroot -uroot -csource:$LVPREFIX$d-$a -- eatmydata sh -e -c '
 175         apt-get update
 176         apt-get -y upgrade
 177         locale-gen
 178         ldconfig
 179         apt-get -y autoremove
 180         apt-get clean'
 181
 182 ###----- That's all, folks --------------------------------------------------