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/$chrootdir already exists"
  14     exit
  15 fi
  16
  17 echo "adding retries for debootstrap to not fail"
  18 echo 'APT::Acquire::Retries "10";' > /etc/apt/apt.conf.d/80-retries
  19
  20 echo "Creating chroot dir '$chrootdir'"
  21
  22 # Create coriolis chroot dir in /opt
  23 mkdir /opt/chroot/$chrootdir
  24
  25 # Install debootstrap and schroot
  26 if [ -e /etc/debian_version ]; then
  27     # Debian detected: use apt
  28     apt install -y debootstrap schroot
  29 elif [ -e /etc/arch-release ]; then
  30     # Arch Linux detected: use pacman
  31     pacman -S --needed debootstrap schroot
  32 fi
  33
  34 # Install debian/buster chroot using debootstrap
  35 /usr/sbin/debootstrap buster /opt/chroot/$chrootdir \
  36                       http://ftp.uk.debian.org/debian
  37 echo "$chrootdir" > /opt/chroot/$chrootdir/etc/debian_chroot
  38
  39 # make chroot profile
  40 mkdir -p /etc/schroot/$chrootdir
  41 cp /etc/schroot/default/copyfiles /etc/schroot/$chrootdir
  42 touch /etc/schroot/$chrootdir/nssdatabases
  43
  44 # create special fstab not bind-mounting /home
  45 cat <<EOF >/etc/schroot/$chrootdir/fstab
  46 # <file system> <mount point>   <type>  <options>       <dump>  <pass>
  47 /proc           /proc           none    rw,bind         0       0
  48 /sys            /sys            none    rw,bind         0       0
  49 /dev            /dev            none    rw,bind         0       0
  50 /dev/pts        /dev/pts        none    rw,bind         0       0
  51 /tmp            /tmp            none    rw,bind         0       0
  52 EOF
  53
  54 if grep -x "\[$chrootdir\]" /etc/schroot/schroot.conf; then
  55     echo "Found [$chrootdir] section in /etc/schroot/schroot.conf"
  56 else
  57     # Add chroot config to schroot.conf
  58     cat <<EOF >>/etc/schroot/schroot.conf
  59 [$chrootdir]
  60 description=Debian Buster for $chrootdir
  61 directory=/opt/chroot/$chrootdir
  62 groups=sbuild-security,$SUDO_USER,users
  63 type=directory
  64 profile=$chrootdir
  65 EOF
  66
  67     echo "Adding the following $chrootdir section to /etc/schroot/schroot.conf:
  68
  69 [$chrootdir]
  70 description=Debian Buster for $chrootdir
  71 directory=/opt/chroot/$chrootdir
  72 groups=sbuild-security,$SUDO_USER,users
  73 type=directory
  74
  75 This enables you to chroot into $chrootdir as an unprivileged user by running
  76 'schroot -c $chrootdir /bin/bash'
  77 "
  78 fi
  79
  80 # Install apt dependencies in the chroot
  81 cd /tmp
  82 schroot -c $chrootdir /bin/bash << EOF
  83 echo Installing necessary apt dependencies in the chroot
  84 apt-get update -y
  85 apt-get upgrade -y
  86 apt-get install -y automake binutils-dev build-essential \
  87 ccache cmake gcc git \
  88 libtool \
  89 sysvinit-core \
  90 sysvinit-utils \
  91 sudo \
  92 python2.7 \
  93 python3 python3-pip \
  94 python3-setuptools python3-dev
  95
  96 # yeah systemd in a chroot? not very funny joke.
  97 apt-get remove -y systemd
  98
  99 # add sudo no password
 100 echo '$SUDO_USER ALL=NOPASSWD: ALL' >> /etc/sudoers.d/$chrootdir
 101
 102 # Create user with same UID in the chroot
 103 useradd -m -p `python3 -c 'import crypt; print (crypt.crypt("1234","Fx"))'` \
 104                 -s /bin/bash $SUDO_USER -k /etc/skel
 105 echo -e "
 106 Added user ${SUDO_USER} with \e[1;91mpassword: 1234\e[0m"
 107
 108 # add deb-src to sources
 109 echo deb-src http://ftp.debian.org/debian buster main > \
 110         /etc/apt/sources.list.d/bustersrc.list
 111
 112 echo -e "
 113 \e[1;91mPlease use command 'passwd ${SUDO_USER}' to change this immediately after this script is run for security purposes.\e[0m
 114 "
 115
 116 # Add convenience variable to chroot user .bash_profile
 117 echo -e 'export PATH=/usr/lib/ccache:"\044PATH"\nexport DISPLAY=:0.0\n' > /home/$SUDO_USER/.bash_profile
 118 chown $SUDO_USER /home/$SUDO_USER/.bash_profile
 119 chgrp $SUDO_USER /home/$SUDO_USER/.bash_profile
 120
 121 echo -e "Added 'export PATH=/usr/lib/ccache:\"\044PATH\"\nexport DISPLAY=:0.0' to /home/$SUDO_USER/.bash_profile to speed up rebuilds"
 122 EOF