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