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 pkgs=; for p in $want; do pkgs=${pkgs:+$pkgs,}$p; done
  82 eatmydata debootstrap $dbsopts --arch=$a --variant=minbase \
  83           --include=$pkgs $d $mnt/fs/ $DEBMIRROR
  84
  85 ## If this is a cross-installation, then install the necessary `qemu' and
  86 ## complete the installation.
  87 case $qemup in
  88   t)
  89     install $LOCAL/cross/$d-$qhost/QEMU/qemu-$qarch-static \
  90             $mnt/fs/usr/bin/
  91     chroot $mnt/fs/ /debootstrap/debootstrap --second-stage
  92     ln -sf /usr/local.schroot/cross/$d-$qhost/QEMU/qemu-$qarch-static \
  93        $mnt/fs/usr/bin/
  94     ;;
  95 esac
  96
  97 ## Set up `/usr/local'.
  98 rm -rf $mnt/fs/usr/local/; ln -s local.schroot/$a $mnt/fs/usr/local
  99
 100 ## Install the `apt' configuration.
 101 rm -rf $mnt/fs/etc/apt/apt.conf $mnt/fs/etc/apt/sources.list
 102 for c in $LOCAL/etc/apt/apt.conf.d/*; do
 103   ln -s /usr/local.schroot/${c#$LOCAL/} $mnt/fs/etc/apt/apt.conf.d/
 104 done
 105 ln -s /usr/local.schroot/etc/apt/sources.$d $mnt/fs/etc/apt/sources.list
 106
 107 cat >$mnt/fs/etc/apt/apt.conf.d/20arch <<EOF
 108 ### -*-conf-*-
 109
 110 APT {
 111         Architecture "$a";
 112 };
 113 EOF
 114
 115 ## Set up the locale and time zone from the host system.
 116 cp /etc/locale.gen /etc/timezone $mnt/fs/etc/
 117 tz=$(cat /etc/timezone); ln -sf /usr/share/zoneinfo/$tz $mnt/fs/etc/localtime
 118 ln -sf /proc/mounts $mnt/fs/etc/mtab
 119
 120 cp /etc/default/locale $mnt/fs/etc/default/
 121
 122 ## Prevent daemons from starting within the chroot.
 123 cat >$mnt/fs/usr/sbin/policy-rc.d <<EOF
 124 #! /bin/sh
 125 echo >&2 "policy-rc.d: Services disabled by policy."
 126 exit 101
 127 EOF
 128 chmod +x $mnt/fs/usr/sbin/policy-rc.d
 129
 130 ## Hack the dynamic linker to prefer libraries in `/usr' over `/usr/local'.
 131 cat >$mnt/fs/etc/ld.so.conf.d/libc.conf <<EOF
 132 # libc default configuration
 133 EOF
 134 cat >$mnt/fs/etc/ld.so.conf.d/zzz-local.conf <<EOF
 135 ### -*-conf-*-
 136 ### Local hack to make /usr/local/ late.
 137 /usr/local/lib
 138 EOF
 139
 140 ## We're done setting the chroot environment up.
 141 umount $mnt/
 142
 143 ## If this is a foreign architecture then we need to set it up.
 144 case $qemup in
 145   t)
 146     ## Keep the chroot's native Qemu out of our way: otherwise we'll stop
 147     ## being able to run programs in the chroot.  There's a hack here because
 148     ## the `--no-rename' option was required in the same version in which is
 149     ## was introduced, so there's no single incantation that will work across
 150     ## the boundary.
 151     schroot -uroot -csource:$lv -- eatmydata sh -e -c "
 152         if dpkg-divert >/dev/null 2>&1 --no-rename --help
 153         then no_rename=--no-rename
 154         else no_rename=
 155         fi
 156
 157         dpkg-divert --package install-cross-tools \$no_rename \
 158           --divert /usr/bin/qemu-$qarch-static.$a --add /usr/bin/qemu-$qarch-static"
 159
 160     ## Install faster native tools.
 161     $STATE/bin/install-cross-tools $d $a
 162 esac
 163
 164 ## Install extra packages now that everything should go fairly quickly.
 165 want=$EXTRA_PACKAGES
 166 pkgs=; for p in $want; do pkgs=${pkgs:+$pkgs,}$p; done
 167 schroot -uroot -csource:$lv -- eatmydata apt-get -y install $pkgs
 168
 169 ## Set the chroot's package state up properly.
 170 schroot -uroot -csource:$lv -- eatmydata sh -e -c '
 171         apt-get update
 172         apt-get -y upgrade
 173         locale-gen
 174         ldconfig
 175         apt-get -y autoremove
 176         apt-get clean'
 177
 178 ###----- That's all, folks --------------------------------------------------