#!/bin/bash -u

############################################################
#
# make_slackware_root.sh -- script to make a Slackware root file system image
# 
# installs packages from a standard distribution, where packages are in subdirectories a/ ap/ n/ etc.
#
# also upgrades packages from a directory of patches (and skips the standard installation for these packages)
#
# the target directory gets the root image
# the target directory gets overwritten
# the target directory is not cleaned by this script, i.e. user must make sure it's empty
#
# note: you need to run this as root
# note: you can trash your system if you specify $target incorrectly
#
# note: this has successfully been run from a slackware 11.0
# installation and from a from a slackware 10.0 installation
#
############################################################


############################################################
#
# start of user-editable data
#

# source distribution directory, e.g. copied from
# ftp://ftp.slackware.com/pub/slackware/slackware-11.0/slackware  (official, slow)
# or 
# http://slackware.mirrors.tds.net/pub/slackware/slackware-11.0/slackware/  (mirror, fast)
distribution=/srv/slackware/slackware-11.0/distribution/slackware

# source patches directory, e.g. copied from 
# ftp://ftp.slackware.com/pub/slackware/slackware-11.0/patches/packages (official, slow)
# or
# http://slackware.mirrors.tds.net/pub/slackware/slackware-11.0/patches/packages/  (mirror, fast)
patches=/srv/slackware/slackware-11.0/patches

# target directory, where we build the root image, typically a partition
#
# this gets overridden, be careful
target=/mnt2


# names of packages to install, the order of the first few of these matters
package_names='
  aaa_base
  devs
  etc
  aaa_elflibs
  glibc-solibs
  openssl-solibs

  bash
  bin
  coreutils
  diffutils
  findutils
  bzip2
  cpio
  dhcpcd
  e2fsprogs
  elvis
  gawk
  glibc-zoneinfo
  grep
  groff
  gzip
  infozip
  iptables
  iptraf
  jove
  less
  links
  lsof
  lvm
  lynx
  man
  man-pages
  nc
  ncftp
  netpipes
  openssh
  pkgtools
  procps
  rsync
  sed
  shadow
  sharutils
  sysklogd
  sysvinit
  tar
  tcpip
  tcsh
  texinfo
  traceroute
  udev
  util-linux
  wget
'

# 
# end of user-editable data
#
# don't mess around below here unless you know what you're doing!
#
############################################################



# some sanity checks on existence of directories
for dir in $distribution $patches $target ; do
  if [ ! -d $dir -o ! -r $dir ] ; then
      echo $dir is not a readable directory
      echo '*** fail ***'
      exit 1
  fi
done

if [ ! -w $target ] ; then
  echo $target is not writable
  echo '*** fail ***'
  exit 1
fi


# databases
installem=( )
patchem=( )
failures=( )

# check all packages, build the installem and patchem lists
echo
echo checking for packages ...
for package in $package_names; do
    glob1=${package}-'[0-9]*'.tgz
    patch=${patches}/$glob1
    install=${distribution}/'*'/$glob1
    if [ -r $patch ] ; then
      echo patch: $patch
      patchem[${#patchem[*]}]=$patch
    elif [ -r $install ] ; then
      echo install: $install
      installem[${#installem[*]}]=$install
    else
      echo fail: $package
      failures[${#failures[*]}]="$package -> ${install}"
      failures[${#failures[*]}]="$package -> ${patch}"
    fi
done

# die if we couldn't find everything
if [ "${failures:-}" ] ; then
  echo 
  echo failed to expand locate packages: tried:
  for failure in "${failures[@]}" ; do
    echo ' ' $failure
  done
  echo '*** fail ***'
  exit 1
fi


# actually do the installations
echo
echo installing ${#installem[*]} distribution packages to $target ...
echo upgrading/installing ${#patchem[*]} patched packages to $target ...

echo
if [ "${installem:-}" ] ; then installpkg -root $target "${installem[@]}" ; fi

echo
if [ "${patchem:-}" ] ; then ROOT=$target upgradepkg --install-new "${patchem[@]}" ; fi

echo
echo done