mk-deb-chroot

   1 #!/bin/bash
   2 if [ "$EUID" -ne 0 ]
   3   then echo "Please run as root"
   4   exit
   5 fi
   6 if [ -z "$1"  ]
   7   then echo "Need arg $1 for chroot to make"
   8   exit
   9 fi
  10 chrootdir="$1"
  11
  12 if [ -e /opt/chroot/$chrootdir ]; then
  13     echo "/opt/chroot/$chrootdir already exists"
  14     exit
  15 fi
  16
  17
  18 echo "Creating chroot dir '$chrootdir'"
  19
  20 # Create coriolis chroot dir in /opt
  21 mkdir -p /opt/chroot/$chrootdir
  22
  23 # argh apt with broken proxies and unreliable ISPs, getting fed up with it
  24 if [ -e /tmp/brokenproxy ]; then
  25     echo "Temp file containing apt proxy fix configuration already exists, skipping!"
  26 else
  27     cat <<EOF >/tmp/brokenproxy
  28 APT::Acquire::Retries "20";
  29 APT::Get::Fix-Broken "true";
  30 Acquire::http::Pipeline-Depth "0";
  31 Acquire::http::No-Cache=True;
  32 Acquire::BrokenProxy=true;
  33 EOF
  34 fi
  35
  36 if [ -e /etc/apt/apt.conf.d/80-retries ]; then
  37     echo "Host system apt.conf.d already has 80-retries, skipping!"
  38 else
  39     cp /tmp/brokenproxy /etc/apt/apt.conf.d/80-retries
  40 fi
  41
  42 # Install debootstrap and schroot
  43 if [ -e /etc/debian_version ]; then
  44     # Debian detected: use apt
  45     REQUIRED_PKG="debootstrap"
  46     PKG_OK=$(dpkg-query -W --showformat='${Status}\n'\
  47     $REQUIRED_PKG|grep "install ok installed")
  48     echo Checking for $REQUIRED_PKG: $PKG_OK
  49     if [ "" = "$PKG_OK" ]; then
  50         apt install -y debootstrap
  51     fi
  52
  53     REQUIRED_PKG="schroot"
  54     PKG_OK=$(dpkg-query -W --showformat='${Status}\n'\
  55     $REQUIRED_PKG|grep "install ok installed")
  56     echo Checking for $REQUIRED_PKG: $PKG_OK
  57     if [ "" = "$PKG_OK" ]; then
  58         apt install -y schroot
  59     fi
  60 elif [ -e /etc/arch-release ]; then
  61     # Arch Linux detected: use pacman
  62     pacman -S --needed debootstrap schroot
  63 fi
  64
  65 # Install debian/buster chroot using debootstrap,
  66 # any /etc/ config must be done after this point!
  67 /usr/sbin/debootstrap buster /opt/chroot/$chrootdir \
  68                       http://ftp.uk.debian.org/debian
  69 echo "$chrootdir" > /opt/chroot/$chrootdir/etc/debian_chroot
  70
  71 # make chroot profile
  72 mkdir -p /etc/schroot/$chrootdir
  73 cp /etc/schroot/default/copyfiles /etc/schroot/$chrootdir
  74 touch /etc/schroot/$chrootdir/nssdatabases
  75
  76 # Copy over brokenproxy apt script to the new chroot environment
  77 cp /tmp/brokenproxy /opt/chroot/$chrootdir/etc/apt/apt.conf.d/80-retries
  78
  79 # create special fstab not bind-mounting /home
  80 schroot_fstab="
  81 # <file system> <mount point>   <type>  <options>       <dump>  <pass>
  82 /proc           /proc           none    rw,bind         0       0
  83 /sys            /sys            none    rw,bind         0       0
  84 /dev            /dev            none    rw,bind         0       0
  85 /dev/pts        /dev/pts        none    rw,bind         0       0
  86 /tmp            /tmp            none    rw,bind         0       0
  87 "
  88
  89 cat <<EOF >/etc/schroot/$chrootdir/fstab
  90 $schroot_fstab
  91 EOF
  92
  93 echo "Adding the following fstab mounts to /etc/schroot/$chrootdir/fstab:
  94
  95 $schroot_fstab
  96
  97 These rules are for the virtual filesystems used by linux in the chroot env
  98 "
  99
 100 schroot_profile="
 101 [$chrootdir]
 102 description=Debian Buster for $chrootdir
 103 directory=/opt/chroot/$chrootdir
 104 groups=sbuild-security,$SUDO_USER,users
 105 type=directory
 106 profile=$chrootdir
 107 "
 108
 109 if grep -x "\[$chrootdir\]" /etc/schroot/schroot.conf; then
 110     echo "Found [$chrootdir] section in /etc/schroot/schroot.conf"
 111 else
 112     # Add chroot config to schroot.conf
 113     cat <<EOF >>/etc/schroot/schroot.conf
 114 $schroot_profile
 115 EOF
 116
 117     echo "Adding the following $chrootdir section to /etc/schroot/schroot.conf:
 118
 119 $schroot_profile
 120
 121 This enables you to chroot into $chrootdir as an unprivileged user by running
 122 'schroot -c $chrootdir /bin/bash'
 123 "
 124 fi
 125
 126 #!!! buster backports is needed for a lot of things
 127 cat << EOF > /opt/chroot/$chrootdir/etc/apt/sources.list.d/buster_backports.list
 128 deb http://deb.debian.org/debian buster-backports main
 129 deb-src http://deb.debian.org/debian buster-backports main
 130 EOF
 131
 132 # oooo annoying, pin preferences for buster-backports
 133 # make it low pririty for reproduceability
 134 cat << EOF > /opt/chroot/$chrootdir/etc/apt/preferences.d/99buster-backports
 135 Package: *
 136 Pin: release a=buster-backports
 137 Pin-Priority: 100
 138
 139 Package: libcurl3-gnutls
 140 Pin: version 7.64*
 141 Pin-Priority: 1001
 142 EOF
 143
 144 # Install apt dependencies in the chroot
 145 cd /tmp
 146 schroot -c $chrootdir /bin/bash --directory=/tmp << EOF
 147 echo Installing necessary apt dependencies in the chroot
 148 apt-get update -y
 149 apt-get upgrade -y
 150 apt-get install -y automake binutils-dev build-essential \
 151         ccache cmake gcc git \
 152         libtool \
 153         sysvinit-core \
 154         sysvinit-utils \
 155         sudo \
 156         python2.7 \
 157         python3 python3-pip \
 158         python3-setuptools python3-dev \
 159         python3-setuptools-scm
 160
 161 # yeah systemd in a chroot? not very funny joke.
 162 apt-get remove -y systemd
 163
 164 # add sudo no password
 165 echo '$SUDO_USER ALL=NOPASSWD: ALL' >> /etc/sudoers.d/$chrootdir
 166
 167 # Create user with same UID in the chroot
 168 useradd -m -p `python3 -c 'import crypt; print (crypt.crypt("1234","Fx"))'` \
 169                 -s /bin/bash $SUDO_USER -k /etc/skel
 170 echo -e "
 171 Added user ${SUDO_USER} with \e[1;91mpassword: 1234\e[0m"
 172
 173 # add deb-src to sources
 174 echo deb-src http://ftp.debian.org/debian buster main > \
 175         /etc/apt/sources.list.d/bustersrc.list
 176
 177 echo -e "
 178 \e[1;91mPlease use command 'passwd ${SUDO_USER}' to change this immediately after this script is run for security purposes.\e[0m
 179 "
 180
 181 # Add convenience variable to chroot user .bash_profile
 182 echo -e 'export PATH=/usr/lib/ccache:"\044PATH"\nexport DISPLAY=:0.0\n' > /home/$SUDO_USER/.bash_profile
 183 chown $SUDO_USER /home/$SUDO_USER/.bash_profile
 184 chgrp $SUDO_USER /home/$SUDO_USER/.bash_profile
 185
 186 echo -e "Added 'export PATH=/usr/lib/ccache:\"\044PATH\"\nexport DISPLAY=:0.0' to /home/$SUDO_USER/.bash_profile to speed up rebuilds"
 187 EOF