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/$chrootdir already exists"
  14     exit
  15 fi
  16
  17 echo "Creating chroot dir '$chrootdir'"
  18
  19 # Create coriolis chroot dir in /opt
  20 mkdir /opt/chroot/$chrootdir
  21
  22 # Install debootstrap and schroot
  23 if [ -e /etc/debian_version ]; then
  24     # Debian detected: use apt
  25     apt install -y debootstrap schroot
  26 elif [ -e /etc/arch-release ]; then
  27     # Arch Linux detected: use pacman
  28     pacman -S --needed debootstrap schroot
  29 fi
  30
  31 # Install debian/buster chroot using debootstrap
  32 /usr/sbin/debootstrap buster /opt/chroot/$chrootdir \
  33                       http://ftp.uk.debian.org/debian
  34 echo "$chrootdir" > /opt/chroot/$chrootdir/etc/debian_chroot
  35
  36 # make chroot profile
  37 mkdir -p /etc/schroot/$chrootdir
  38 cp /etc/schroot/default/copyfiles /etc/schroot/$chrootdir
  39 touch /etc/schroot/$chrootdir/nssdatabases
  40
  41 # create special fstab not bind-mounting /home
  42 cat <<EOF >/etc/schroot/$chrootdir/fstab
  43 # <file system> <mount point>   <type>  <options>       <dump>  <pass>
  44 /proc           /proc           none    rw,bind         0       0
  45 /sys            /sys            none    rw,bind         0       0
  46 /dev            /dev            none    rw,bind         0       0
  47 /dev/pts        /dev/pts        none    rw,bind         0       0
  48 /tmp            /tmp            none    rw,bind         0       0
  49 EOF
  50
  51 # Add chroot config to schroot.conf
  52 cat <<EOF >>/etc/schroot/schroot.conf
  53 [$chrootdir]
  54 description=Debian Buster for $chrootdir
  55 directory=/opt/chroot/$chrootdir
  56 groups=sbuild-security,$SUDO_USER,users
  57 type=directory
  58 profile=$chrootdir
  59 EOF
  60
  61 echo "Adding the following $chrootdir section to /etc/schroot/schroot.conf:
  62
  63 [$chrootdir]
  64 description=Debian Buster for $chrootdir
  65 directory=/opt/chroot/$chrootdir
  66 groups=sbuild-security,$SUDO_USER,users
  67 type=directory
  68
  69 This enables you to chroot into $chrootdir as an unprivileged user by running
  70 'schroot -c $chrootdir /bin/bash'
  71 "
  72
  73 # Install apt dependencies in the chroot
  74 cd /tmp
  75 schroot -c $chrootdir /bin/bash << EOF
  76 echo Installing necessary apt dependencies in the chroot
  77 apt-get update -y
  78 apt-get upgrade -y
  79 apt-get install -y automake binutils-dev build-essential \
  80 ccache cmake gcc git \
  81 libtool \
  82 sysvinit-core \
  83 sysvinit-utils \
  84 sudo \
  85 python2.7 \
  86 python3 python3-pip \
  87 python3-setuptools python3-dev
  88
  89 # yeah systemd in a chroot? not very funny joke.
  90 apt-get remove -y systemd
  91
  92 # add sudo no password
  93 echo '$SUDO_USER ALL=NOPASSWD: ALL' >> /etc/sudoers.d/$chrootdir
  94
  95 # Create user with same UID in the chroot
  96 useradd -m -p `python3 -c 'import crypt; print (crypt.crypt("1234","Fx"))'` \
  97                 -s /bin/bash $SUDO_USER -k /etc/skel
  98 echo -e "
  99 Added user ${SUDO_USER} with \e[1;91mpassword: 1234\e[0m"
 100
 101 # add deb-src to sources
 102 echo deb-src http://ftp.debian.org/debian buster main > \
 103         /etc/apt/sources.list.d/bustersrc.list
 104
 105 echo -e "
 106 \e[1;91mPlease use command 'passwd ${SUDO_USER}' to change this immediately after this script is run for security purposes.\e[0m
 107 "
 108
 109 # Add convenience variable to chroot user .bash_profile
 110 echo -e 'export PATH=/usr/lib/ccache:"\044PATH"\nexport DISPLAY=:0.0\n' > /home/$SUDO_USER/.bash_profile
 111 chown $SUDO_USER /home/$SUDO_USER/.bash_profile
 112 chgrp $SUDO_USER /home/$SUDO_USER/.bash_profile
 113
 114 echo -e "Added 'export PATH=/usr/lib/ccache:\"\044PATH\"\nexport DISPLAY=:0.0' to /home/$SUDO_USER/.bash_profile to speed up rebuilds"
 115 EOF