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="$1"
  11 echo "creating chroot '$chrootdir'"
  12
  13 # Create coriolis chroot dir in /opt
  14 mkdir -p /opt/chroot/$chrootdir
  15
  16 # Install debootstrap and schroot
  17 if [ -e /etc/debian_version ]; then
  18     # Debian detected: use apt
  19     apt install -y debootstrap schroot
  20 elif [ -e /etc/arch-release ]; then
  21     # Arch Linux detected: use pacman
  22     pacman -S --needed debootstrap schroot
  23 fi
  24
  25 # Install debian/buster chroot using debootstrap
  26 /usr/sbin/debootstrap buster /opt/chroot/$chrootdir \
  27                       http://ftp.uk.debian.org/debian
  28 echo "$chrootdir" > /opt/chroot/$chrootdir/etc/debian_chroot
  29
  30 # make chroot profile
  31 mkdir -p /etc/schroot/$chrootdir
  32 cp /etc/schroot/default/copyfiles /etc/schroot/$chrootdir
  33 touch /etc/schroot/$chrootdir/nssdatabases
  34
  35 # create special fstab not bind-mounting /home
  36 cat <<EOF >/etc/schroot/$chrootdir/fstab
  37 # <file system> <mount point>   <type>  <options>       <dump>  <pass>
  38 /proc           /proc           none    rw,bind         0       0
  39 /sys            /sys            none    rw,bind         0       0
  40 /dev            /dev            none    rw,bind         0       0
  41 /dev/pts        /dev/pts        none    rw,bind         0       0
  42 /tmp            /tmp            none    rw,bind         0       0
  43 EOF
  44
  45 # Add chroot config to schroot.conf
  46 cat <<EOF >>/etc/schroot/schroot.conf
  47 [$chrootdir]
  48 description=Debian Buster for $chrootdir
  49 directory=/opt/chroot/$chrootdir
  50 groups=sbuild-security,$SUDO_USER,users
  51 type=directory
  52 profile=$chrootdir
  53 EOF
  54
  55 echo "Adding the following $chrootdir section to /etc/schroot/schroot.conf:
  56
  57 [$chrootdir]
  58 description=Debian Buster for $chrootdir
  59 directory=/opt/chroot/$chrootdir
  60 groups=sbuild-security,$SUDO_USER,users
  61 type=directory
  62
  63 This enables you to chroot into $chrootdir as an unprivileged user by running
  64 'schroot -c $chrootdir /bin/bash'
  65 "
  66
  67 # Install apt dependencies in the chroot
  68 cd /tmp
  69 schroot -c $chrootdir /bin/bash << EOF
  70 echo Installing necessary apt dependencies in the chroot
  71 apt-get update -y
  72 apt-get upgrade -y
  73 apt-get install -y automake binutils-dev build-essential \
  74 ccache cmake gcc git \
  75 libtool \
  76 sysvinit-core \
  77 sysvinit-utils \
  78 sudo \
  79 python2.7 \
  80 python3 python3-pip \
  81 python3-setuptools python3-dev
  82
  83 # yeah systemd in a chroot? not very funny joke.
  84 apt-get remove -y systemd
  85
  86 # add sudo no password
  87 echo '$SUDO_USER ALL=NOPASSWD: ALL' >> /etc/sudoers.d/$chrootdir
  88
  89 # Create user with same UID in the chroot
  90 useradd -m -p `python3 -c 'import crypt; print (crypt.crypt("1234","Fx"))'` \
  91                 -s /bin/bash $SUDO_USER -k /etc/skel
  92 echo -e "
  93 Added user ${SUDO_USER} with \e[1;91mpassword: 1234\e[0m"
  94
  95 # add deb-src to sources
  96 echo deb-src http://ftp.debian.org/debian buster main > \
  97         /etc/apt/sources.list.d/bustersrc.list
  98
  99 echo -e "
 100 \e[1;91mPlease use command 'passwd ${SUDO_USER}' to change this immediately after this script is run for security purposes.\e[0m
 101 "
 102
 103 # Add convenience variable to chroot user .bash_profile
 104 echo -e 'export PATH=/usr/lib/ccache:"\044PATH"\nexport DISPLAY=:0.0\n' > /home/$SUDO_USER/.bash_profile
 105 chown $SUDO_USER /home/$SUDO_USER/.bash_profile
 106 chgrp $SUDO_USER /home/$SUDO_USER/.bash_profile
 107
 108 echo -e "Added 'export PATH=/usr/lib/ccache:\"\044PATH\"\nexport DISPLAY=:0.0' to /home/$SUDO_USER/.bash_profile to speed up rebuilds"
 109 EOF