#!/bin/sh
# Athena installer script.
# Maintainer: debathena@mit.edu
# Based on original Debathena installer script by: Tim Abbott <tabbott@mit.edu>

# Download this to a Debian or Ubuntu machine and run it as root.  It can
# be downloaded with:
#   wget -N http://debathena.mit.edu/install-debathena.sh

set -e

# The user's umask will sometimes carry over; don't let that happen.
umask 022

# Set the "seen" flag for all debconf questions that we configure
# (Note: cluster installs still run noninteractively)
cat <<EOF | debconf-set-selections
openafs-client  openafs-client/thiscell seen true
openafs-client  openafs-client/cachesize seen true
krb5-config     krb5-config/default_realm seen true
zephyr-clients  zephyr-clients/servers seen true
# These are also questions asked by default, but 
# the user should probably see them anyway.
#gdm     shared/default-x-display-manager seen true
#cyrus-common    cyrus-common/removespool seen true
#hddtemp hddtemp/daemon seen true
EOF

output() {
  printf '\033[38m'; echo "$@"; printf '\033[0m'
}

error() {
  printf '\033[31m'; echo "$@"; printf '\033[0m'
}

ask() {
  answer=''
  while [ y != "$answer" -a n != "$answer" ]; do
    printf '\033[38m'; echo -n "$1"; printf '\033[0m'
    read answer
    [ Y = "$answer" ] && answer=y
    [ N = "$answer" ] && answer=n
    [ -z "$answer" ] && answer=$2
  done
  output ""
}

if [ `id -u` != "0" ]; then
  error "You must run the Debathena installer as root."
  if [ -x /usr/bin/sudo ]; then
    error "Try running 'sudo $0'."
  fi
  exit 1
fi

pxetype=
if test -f /root/pxe-install-flag ; then
  pxetype=`head -1 /root/pxe-install-flag`
fi

have_lsbrelease="$(dpkg-query -W -f '${Status}' lsb-release 2>/dev/null)"
if [ "$have_lsbrelease" != "install ok installed" ]; then
  echo "The installer requires the 'lsb-release' package to determine"
  echo "whether or not installation can proceed."
  ask "Is it ok to install this package now? [Y/n] " y
  if [ y = "$answer" ]; then
    if ! apt-get -qq update && apt-get -qqy install lsb-release; then
	error "Could not install lsb-release.  Try installing it manually."
	exit 1
    fi
  else
    error "Sorry, lsb-release is required.  Cannot continue."
    exit 1
  fi
fi
distro=`lsb_release -cs`
aptitude=aptitude
case $distro in
  squeeze)
    ;;
  hardy|lucid)
    ubuntu=yes
    ;;
  natty|oneiric|precise)
    ubuntu=yes
    aptitude=apt-get
    ;;
  quantal)
    ubuntu=yes
    aptitude=apt-get
    output "The release you are running ($distro) is not supported"
    output "and installing Debathena on it is probably a bad idea."
    if ! test -f /root/pxe-install-flag; then
	ask "Are you sure you want to proceed? [y/N] " n
	[ y != "$answer" ] && exit 1
    fi
    ;;
  lenny|intrepid|jaunty|karmic|maverick)
    error "The release you are running ($distro) is no longer supported."
    error "Generally, Debathena de-supports releases when they are no longer"
    error "supported by upstream.  If you believe you received this message"
    error "in error, please contact debathena@mit.edu."
    exit 1
    ;;
  *)
    error "Unsupported release codename: $distro"
    error "Sorry, Debathena does not support installation on this release at this time."
    error "(New releases may not be supported immediately after their release)."
    error "If you believe you are running a supported release or have questions,"
    error "please contact debathena@mit.edu"
    exit 1
    ;;
esac

laptop=no
wifi=no
if [ -x /usr/sbin/laptop-detect ] && /usr/sbin/laptop-detect 2>/dev/null; then
    laptop=yes
fi

if [ -x /usr/bin/nmcli ] && /usr/bin/nmcli dev status 2>/dev/null | awk '{print $2}' | grep -q 802-11-wireless; then
    wifi=yes
fi

echo "Welcome to the Debathena installer."
echo ""
echo "Please choose the category which best suits your needs.  Each category"
echo "in this list includes the functionality of the previous ones.  See the"
echo "documentation at http://debathena.mit.edu for more information."
echo ""
echo "  standard:        Athena client software and customizations"
echo "                   Recommended for laptops and single-user computers."
echo "  login:           Allow Athena accounts to log into your machine"
echo "                   Recommended for private remote-access servers."
echo "  login-graphical: Athena graphical login customizations"
echo "                   Recommended for private multi-user desktops."
echo "  workstation:     Graphical workstation with automatic updates"
echo "                   Recommended for auto-managed cluster-like systems."
echo ""

if [ "$laptop" = "yes" ] || [ "$wifi" = "yes" ]; then
    cat <<EOF 
This machine appears to be a laptop or has at least one wireless
network device.  You probably want to choose "standard" unless this
device will have an uninterrupted network connection.
EOF
fi

category=""
if [ cluster = "$pxetype" ] ; then
  category=cluster ;
  echo "PXE cluster install detected, so installing \"cluster\"."
fi
while [ standard != "$category" -a login != "$category" -a \
        login-graphical != "$category" -a workstation != "$category" -a \
        cluster != "$category" ]; do
  output -n "Please choose a category or press control-C to abort: "
  read category
done
if [ cluster = "$category" ]; then
  # We still want these set for cluster installs, which should be truly
  # noninteractive
  export DEBCONF_NONINTERACTIVE_SEEN=true
  export DEBIAN_FRONTEND=noninteractive
fi

mainpackage=debathena-$category

csoft=no
tsoft=no
resolvconfhack=no
echo "The extra-software package installs a standard set of software"
echo "determined to be of interest to MIT users, such as LaTeX.  It is pretty"
echo "big (several gigabytes, possibly more)."
echo ""
echo "Note: This package may include software with additional license terms."
echo "      By installing it, you are agreeing to the terms of these licenses."
echo "      For more information, please see http://debathena.mit.edu/licensing"
echo ""
if [ cluster = $category -o workstation = $category ] ; then
  # See Trac #648 and LP:471975
  resolvconfhack=yes
  echo "The extra-software package is required for '$category' and will be installed."
  csoft=yes
  # Not setting tsoft=yes here; -cluster will pull it in anyway.
else
  ask "Do you want the extra-software package [y/N]? " n
  if [ y = "$answer" ]; then
    csoft=yes
  fi
fi
if [ yes = "$csoft" ]; then
    # Preseed an answer to the java license query, which license was already accepted
    # at install time:
    echo "sun-java6-bin shared/accepted-sun-dlj-v1-1 boolean true" |debconf-set-selections
fi

if [ "$(cat /sys/class/dmi/id/product_name)" = "OptiPlex 790" ] && \
    dpkg --compare-versions "$(uname -r)" lt 3.2~; then
    noacpi=y
    if [ "$category" != "cluster" ]; then
	echo
	echo "The Dell 790 sometimes has problems rebooting.  The best way to"
	echo "work around this is to pass 'reboot=pci' at boot time."
	echo "This change will be made in your GRUB (bootloader) configuration."
	ask "Is it ok to do this now? [Y/n] " y
	if [ y != "$answer" ]; then
	    noacpi=n
	fi
    fi
    if [ "$noacpi" = "y" ] && ! grep -q "Added by install-debathena.sh to address reboot issues on the Dell 790" /etc/default/grub; then
	cat >> /etc/default/grub << 'EOF'

# Added by install-debathena.sh to address reboot issues on the Dell 790
GRUB_CMDLINE_LINUX="reboot=pci $GRUB_CMDLINE_LINUX"
EOF
	update-grub
    fi
fi

echo "A summary of your choices:"
echo "  Category: $category"
echo "  Extra-software package: $csoft"
echo "  Third-party software package: $tsoft"
echo ""
if [ "$pxetype" = "cluster" ] ; then
  if wget -q http://athena10.mit.edu/installer/installing.txt; then
     cat installing.txt > /dev/tty6
     date > /dev/tty6
     chvt 6
     rm installing.txt
  fi
  # Divert the default background and install our own so that failed machines
  # are more conspicuous
  echo "Diverting default background..."
  bgimage=/usr/share/backgrounds/warty-final-ubuntu.png
  divertedbg=no
  if dpkg-divert --divert ${bgimage}.debathena --rename $bgimage; then
      divertedbg=yes
      if ! wget -N -O $bgimage http://debathena.mit.edu/error-background.png; then
	  echo "Hrm, that didn't work.  Oh well..."
	  dpkg-divert --rename --remove $bgimage
	  divertedbg=no
      fi
  fi

  # Setup for package installs in a chrooted immediately-postinstall environment.
  echo "Setting locale."
  export LANG
  . /etc/default/locale
  echo "LANG set to $LANG."
  echo "Mounting /proc."
  mount /proc 2> /dev/null || :
  # Clear toxic environment settings inherited from the installer.
  unset DEBCONF_REDIR
  unset DEBIAN_HAS_FRONTEND
  if [ cluster = "$pxetype" ] ; then
    # Network, LVM, and display config that's specific to PXE cluster installs.
    # If someone is installing -cluster on an already-installed machine, it's
    # assumed that this config has already happened and shouldn't be stomped on.

    # Configure network based on the preseed file settings, if present.
    if test -f /root/debathena.preseed && ! grep -q netcfg/get_ipaddress /proc/cmdline; then
      # Switch to canonical hostname.
      ohostname=`cat /etc/hostname`
      # Hack to avoid installing debconf-get for just this.
      ipaddr=`grep netcfg/get_ipaddress /root/debathena.preseed|sed -e 's/.* //'`
      netmask=`grep netcfg/get_netmask /root/debathena.preseed|sed -e 's/.* //'`
      gateway=`grep netcfg/get_gateway /root/debathena.preseed|sed -e 's/.* //'`

      hostname=`host $ipaddr | \
          sed 's#^.*domain name pointer \(.*\)$#\1#' | sed 's;\.*$;;' | \
          tr '[A-Z]' '[a-z]'`
      if echo $hostname|grep -q "not found" ; then
	hostname=""
	printf "\a"; sleep 1 ; printf "\a"; sleep 1 ;printf "\a"
	echo "The IP address you selected, $ipaddr, does not have an associated"
	echo "hostname.  Please confirm that you're using the correct address."
	while [ -z "$hostname" ] ; do
	  echo -n "Enter fully qualified hostname [no default]: "
	  read hostname
	done
      fi
      echo ${hostname%%.*} > /etc/hostname
      sed -e 's/\(127\.0\.1\.1[ 	]*\).*/\1'"$hostname ${hostname%%.*}/" < /etc/hosts > /etc/hosts.new
      mv -f /etc/hosts.new /etc/hosts
      if grep -q dhcp /etc/network/interfaces ; then
	sed -e s/dhcp/static/ < /etc/network/interfaces > /etc/network/interfaces.new
	echo "	address $ipaddr" >> /etc/network/interfaces.new
	echo "	netmask $netmask" >> /etc/network/interfaces.new
	echo "	gateway $gateway" >> /etc/network/interfaces.new
	echo "	dns-nameservers 18.72.0.3 18.70.0.160 18.71.0.151" >> /etc/network/interfaces.new
	mv -f /etc/network/interfaces.new /etc/network/interfaces
      fi
      hostname ${hostname%%.*}
    fi

  fi
else
  output "Press return to begin or control-C to abort"
  read dummy
fi

apt-get update

output "Verifying machine is up to date..."
pattern='^0 upgraded, 0 newly installed, 0 to remove'
if ! apt-get --simulate --assume-yes dist-upgrade | grep -q "$pattern"; then
    if [ -n "$pxetype" ] ; then
	output "Forcing an upgrade"
	apt-get --assume-yes dist-upgrade
    else 
	error "Your system is not up to date.  Proceeding with an install at"
	error "this time could render your system unusable."
	error "Please run 'apt-get dist-upgrade' as root or use the GUI update"
	error "manager to ensure your system is up to date before continuing."
	error "NOTE: You do NOT need to upgrade to a newer release of Ubuntu",
	error "you merely need to ensure you have the latest software updates"
	error "for the current version."
	exit 1
    fi
fi

if ! hash aptitude >/dev/null 2>&1; then
  output "Installing Debathena installer dependency: aptitude"
  apt-get -y install aptitude
fi

output "Installing Debathena installer dependencies: wget and dnsutils"
apt-get -y install wget dnsutils
if [ yes = "$resolvconfhack" ]; then
  output "Installing resolvconf ahead of time"
  apt-get -y install resolvconf
fi

# Only add our openafs component if DKMS isn't available
openafs_component=""
if aptitude show openafs-modules-dkms > /dev/null; then
  modules="openafs-modules-dkms"
else
  openafs_component=" openafs"
fi

output "Adding the Debathena repository to the apt sources"
output "(This may cause the update manager to claim new upgrades are available."
output "Ignore them until this script is complete.)"
sourceslist=/etc/apt/sources.list.d/debathena.list
clustersourceslist=/etc/apt/sources.list.d/debathena.clusterinfo.list
if [ -z "$hostname" ] ; then hostname=`hostname` ; fi

if [ ! -e "$sourceslist" ] || ! grep -v ^# "$sourceslist" | grep -q debathena; then
  if [ -e "$sourceslist" ]; then
    echo "" >> $sourceslist
  fi
  echo "deb http://debathena.mit.edu/apt $distro debathena debathena-config debathena-system$openafs_component" >> $sourceslist
  echo "deb-src http://debathena.mit.edu/apt $distro debathena debathena-config debathena-system$openafs_component" >> $sourceslist
fi

# Note that hesiod may contain multiple apt_release tokens.  We want to
# include known repositories but make no assumptions about wanting
# others.  (For instances, "development" does @i{not} automatically
# infer "proposed".)
hescluster=$(dig +short +bufsize=2048 ${hostname}.cluster.ns.athena.mit.edu TXT) || hescluster=""

aptexplained=false
for hc in proposed development bleeding; do
  if echo "$hescluster" | grep -Fxq "\"apt_release $hc\""; then
    echo "Adding $distro-$hc apt repository."
    if [ "${aptexplained}" = false ] ; then
      echo "" >> $clustersourceslist
      echo "# This file is automatically updated by debathena-auto-update" >> $clustersourceslist
      echo "# based on your Hesiod cluster information. If you want to" >> $clustersourceslist
      echo "# make changes, do so in another file." >> $clustersourceslist
      aptexplained=true
    fi
    echo "" >> $clustersourceslist
    echo "deb http://debathena.mit.edu/apt $distro-${hc} debathena debathena-config debathena-system$openafs_component" >> $clustersourceslist
    echo "deb-src http://debathena.mit.edu/apt $distro-${hc} debathena debathena-config debathena-system$openafs_component" >> $clustersourceslist
  fi
done

if [ "$ubuntu" = "yes" ]; then
  output "Making sure the universe repository is enabled"
  sed -i 's,^# \(deb\(\-src\)* http://archive.ubuntu.com/ubuntu [[:alnum:]]* universe\)$,\1,' /etc/apt/sources.list
fi

output "Downloading the Debathena archive signing key"
if ! wget -N http://debathena.mit.edu/apt/debathena-archive-keyring.asc ; then
  error "Download failed; terminating."
  exit 1
fi
echo "fa787714d1ea439c28458aab64962f755e2bdee7a3520919a72b641458757fa3586fd269cc1dae8d99047e00b3df88db0826f0c99a1f5a8771618b3c0be8e3bd  ./debathena-archive-keyring.asc" | \
  sha512sum -c
apt-key add debathena-archive-keyring.asc
rm ./debathena-archive-keyring.asc

$aptitude update

if [ -z "$modules" ]; then
  modules_want=$(dpkg-query -W -f '${Source}\t${Package}\n' 'linux-image-*' | \
   sed -nre 's/^linux-(meta|latest[^\t]*)\tlinux-image-(.*)$/openafs-modules-\2/p')
  modules=
  for m in $modules_want; do
    aptitude show $m > /dev/null && modules="$modules $m"
  done
fi

if [ -z "$modules" ]; then
  error "An OpenAFS modules metapackage for your kernel is not available."
  error "Please use the manual installation instructions at"
  error "http://debathena.mit.edu/install"
  error "You will need to compile your own AFS modules as described at:"
  error "http://debathena.mit.edu/troubleshooting#openafs-custom"
  exit 1
fi

output "Installing OpenAFS kernel metapackage"
apt-get -y install $modules

if [ "cluster" = "$category" ] || [ "workstation" = "$category" ] ; then
    output "Installing debathena-license-config"
    apt-get -y install debathena-license-config
fi

# Use the noninteractive frontend to install the main package.  This
# is so that AFS and Zephyr don't ask questions of the user which
# debathena packages will later stomp on anyway.
output "Installing main Debathena metapackage $mainpackage"

$aptitude -y install "$mainpackage"

# Use the default front end and allow questions to be asked; otherwise
# Java will fail to install since it has to present its license.
if [ yes = "$csoft" ]; then
  output "Installing debathena-extra-software"
  DEBIAN_PRIORITY=critical $aptitude -y install debathena-extra-software
fi
if [ yes = "$tsoft" ]; then
  output "Installing debathena-thirdparty"
  DEBIAN_PRIORITY=critical $aptitude -y install debathena-thirdparty
fi

# Post-install cleanup for cluster systems.
if [ "$divertedbg" = "yes" ]; then
    rm -f $bgimage
    if ! dpkg-divert --rename --remove $bgimage; then
	echo "Failed to remove diversion of background.  You probably don't care."
    fi
fi

if [ cluster = "$category" ] ; then
  # Force an /etc/adjtime entry so there's no confusion about whether the
  # hardware clock is UTC or local.
  echo "Setting hardware clock to UTC."
  hwclock --systohc --utc
fi