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 if grep -x "\[$chrootdir\]" /etc/schroot/schroot.conf; then
  52     echo "Found [$chrootdir] section in /etc/schroot/schroot.conf"
  53 else
  54     # Add chroot config to schroot.conf
  55     cat <<EOF >>/etc/schroot/schroot.conf
  56 [$chrootdir]
  57 description=Debian Buster for $chrootdir
  58 directory=/opt/chroot/$chrootdir
  59 groups=sbuild-security,$SUDO_USER,users
  60 type=directory
  61 profile=$chrootdir
  62 EOF
  63
  64     echo "Adding the following $chrootdir section to /etc/schroot/schroot.conf:
  65
  66 [$chrootdir]
  67 description=Debian Buster for $chrootdir
  68 directory=/opt/chroot/$chrootdir
  69 groups=sbuild-security,$SUDO_USER,users
  70 type=directory
  71
  72 This enables you to chroot into $chrootdir as an unprivileged user by running
  73 'schroot -c $chrootdir /bin/bash'
  74 "
  75 fi
  76
  77 # Install apt dependencies in the chroot
  78 cd /tmp
  79 schroot -c $chrootdir /bin/bash << EOF
  80 echo Installing necessary apt dependencies in the chroot
  81 apt-get update -y
  82 apt-get upgrade -y
  83 apt-get install -y automake binutils-dev build-essential \
  84 ccache cmake gcc git \
  85 libtool \
  86 sysvinit-core \
  87 sysvinit-utils \
  88 sudo \
  89 python2.7 \
  90 python3 python3-pip \
  91 python3-setuptools python3-dev
  92
  93 # yeah systemd in a chroot? not very funny joke.
  94 apt-get remove -y systemd
  95
  96 # add sudo no password
  97 echo '$SUDO_USER ALL=NOPASSWD: ALL' >> /etc/sudoers.d/$chrootdir
  98
  99 # Create user with same UID in the chroot
 100 useradd -m -p `python3 -c 'import crypt; print (crypt.crypt("1234","Fx"))'` \
 101                 -s /bin/bash $SUDO_USER -k /etc/skel
 102 echo -e "
 103 Added user ${SUDO_USER} with \e[1;91mpassword: 1234\e[0m"
 104
 105 # add deb-src to sources
 106 echo deb-src http://ftp.debian.org/debian buster main > \
 107         /etc/apt/sources.list.d/bustersrc.list
 108
 109 echo -e "
 110 \e[1;91mPlease use command 'passwd ${SUDO_USER}' to change this immediately after this script is run for security purposes.\e[0m
 111 "
 112
 113 # Add convenience variable to chroot user .bash_profile
 114 echo -e 'export PATH=/usr/lib/ccache:"\044PATH"\nexport DISPLAY=:0.0\n' > /home/$SUDO_USER/.bash_profile
 115 chown $SUDO_USER /home/$SUDO_USER/.bash_profile
 116 chgrp $SUDO_USER /home/$SUDO_USER/.bash_profile
 117
 118 echo -e "Added 'export PATH=/usr/lib/ccache:\"\044PATH\"\nexport DISPLAY=:0.0' to /home/$SUDO_USER/.bash_profile to speed up rebuilds"
 119 EOF