source: BLFS/libs/func_packages@ 6feeca3

#!/bin/bash
#
# $Id$
#
set -e

#-----------------------#
get_pkg_ver() {         # Find package version for a given package ID
#-----------------------#
  local pkg_id=$1

  case ${pkg_id} in
                  # ALSA packages version
            alsa* ) pkg_id=alsa ;;

                  # KDE packages version
          kdevelop ) : ;;
        kde*config ) : ;;
              kde* ) pkg_id=kde ;;

                  # Xorg7 packages version
      xorg7-server ) pkg_id=xorg-server ;;
            xterm2 ) pkg_id=xterm ;;
            xorg7* ) pkg_id=xorg7 ;;

                   # Others (ID value don't match entity name)
    wireless_tools ) pkg_id=wireless-tools ;;
        bind-utils ) pkg_id=bind ;;
         html-tidy ) pkg_id=tidy ;;
               jdk ) pkg_id=jdk-src ;;
          reiserfs ) pkg_id=reiser ;;
               xfs ) pkg_id=xfsprogs ;;
  esac

  xmllint --noent ./${BLFS_XML}/book/bookinfo.xml 2>/dev/null | \
  grep -i " ${pkg_id}-version " | cut -d "\"" -f2

}

#-----------------------#
get_installed_ver() {   # Find installed package version for a given package ID
#-----------------------#
  local pkg_id=$1

  find $TRACKING_DIR -name "${pkg_id}-[[:digit:]]*" | sed "s/.*${pkg_id}-//"

}

#-----------------------#
generate_packages()  {  # Master packages file
#-----------------------#
  local pkg_id file pkg_ver
  local ALSA_VER GNOME_VER GNOME_MINOR_VER KDE_VER KDE_KOFFICE_VER XORG7_VER

  > packages.tmp

  # Extract Id and path for sect1 files
  for file in `find $BLFS_XML -name "*.xml"` ; do
    pkg_id=$(grep "sect1 id" $file | sed -e 's/<sect1 id="//;s/".*//')
    pkg_ver=$(get_pkg_ver $pkg_id)
    installed_ver=$(get_installed_ver $pkg_id)
    [[ ! -z "$pkg_id" ]] && echo -e "$pkg_id\t$file\t$pkg_ver\t$installed_ver" >> packages.tmp
  done

  # IDs clean-up (unuseful pages or commented-out packages, could be more)
  sed -i '/template/d;/ntroduction/d;/preface/d;/alsa.xml/d' packages.tmp
  sed -i '/obsolete/d;/postlfs-/d;/-client.xml/d;/xorg7.xml/d' packages.tmp
  sed -i '/courier.xml/d;/-other\t/d;/others-/d;/other-/d' packages.tmp
  sed -i '/fw-firewall\t/d;/gcc2\t/d;/cvsserver\t/d;/svnserver\t/d' packages.tmp
  sed -i '/fam\t/d;/libungif\t/d;/ncpfs\t/d;/slrn\t/d;/konq\t/d' packages.tmp
  sed -i '/gst-plugins\t/d;/openquicktime\t/d;/compressdoc\t/d' packages.tmp

  # Meta-packages version
  ALSA_VER=$(get_pkg_ver alsa)
  GNOME_VER=$(get_pkg_ver gnome)
  GNOME_MINOR_VER=$(get_pkg_ver gnome-minor)
  KDE_VER=$(get_pkg_ver kde)
  KDE_INST_VER=$(get_installed_ver kde)
  KDE_KOFFICE_VER=$(get_pkg_ver koffice)
  XORG7_VER=$(get_pkg_ver xorg7)

  # Meta-packages installed version
  ALSA_INST_VER=$(get_installed_ver alsa)
  GNOME_CORE_INST_VER=$(get_installed_ver gnome-core)
  GNOME_FULL_INST_VER=$(get_installed_ver gnome-full)
  KDE_CORE_INST_VER=$(get_installed_ver kde-core)
  KDE_FULL_INST_VER=$(get_installed_ver kde-full)
  KDE_KOFFICE_INST_VER=$(get_installed_ver kde-koffice)
  XORG7_INST_VER=$(get_installed_ver xorg7)

  # Add header with meta-packages pseudo Id
{
  cat << EOF
alsa    $BLFS_XML       $ALSA_VER       $ALSA_INST_VER
gnome-core      $BLFS_XML       $GNOME_VER$GNOME_MINOR_VER      $GNOME_CORE_INST_VER
gnome-full      $BLFS_XML       $GNOME_VER$GNOME_MINOR_VER      $GNOME_FULL_INST_VER
kde-core        $BLFS_XML       $KDE_VER        $KDE_CORE_INST_VER
kde-full        $BLFS_XML       $KDE_VER        $KDE_FULL_INST_VER
kde-koffice     $BLFS_XML       $KDE_KOFFICE_VER        $KDE_KOFFICE_INST_VER
xorg7   $BLFS_XML       $XORG7_VER      $XORG7_INST_VER
EOF
} >> packages.tmp

  # Dump packages list
  sort packages.tmp -b --key=2 --field-separator=/ --output=packages

  # Clean up
  rm packages.tmp
}

# Pre-made *.dep files for meta-packages

#--------------------------#
generate_gnome_core()  {   # GNOME core
#--------------------------#
  local line base_xml package

  > gnome-core.dep.tmp

  for line in `grep "xi:include" $BLFS_XML/gnome/core/core.xml` ; do
    base_xml=`echo $line | sed 's/^.*href="//;s/".*//'`
    package=`grep "gnome/core/$base_xml" packages | cut -f1`
    [[ -n "$package" ]] && echo $package >> gnome-core.dep.tmp
  done

  # Replace dummy packages with the proper ones
  sed -i 's/GNOME-//g' gnome-core.dep.tmp

  tac gnome-core.dep.tmp > libs/gnome-core.dep
  rm gnome-core.dep.tmp
}

#--------------------------#
generate_gnome_full()  {   # GNOME full
#--------------------------#
  local line base_xml package

  echo "gnome-core" > gnome-full.dep.tmp

  for line in `grep "xi:include" $BLFS_XML/gnome/add/add.xml` ; do
    base_xml=`echo $line | sed 's/^.*href="//;s/".*//'`
    package=`grep "gnome/add/$base_xml" packages | cut -f1`
    [[ -n "$package" ]] && echo $package >> gnome-full.dep.tmp
  done

  tac gnome-full.dep.tmp > libs/gnome-full.dep
  rm gnome-full.dep.tmp
}

#--------------------------#
generate_kde_core()  {     # KDE core
#--------------------------#
  local line base_xml package

  > kde-core.dep.tmp

  for line in `grep "xi:include" $BLFS_XML/kde/core/core.xml` ; do
    base_xml=`echo $line | sed 's/^.*href="//;s/".*//'`
    package=`grep "kde/core/$base_xml" packages | cut -f1`
    [[ -n "$package" ]] && echo $package >> kde-core.dep.tmp
  done

  tac kde-core.dep.tmp > libs/kde-core.dep
  rm kde-core.dep.tmp
}

#--------------------------#
generate_kde_full()  {     # KDE full
#--------------------------#
  local line base_xml package

  echo "kde-core" > kde-full.dep.tmp

  for line in `grep "xi:include" $BLFS_XML/kde/add/add.xml` ; do
    base_xml=`echo $line | sed 's/^.*href="//;s/".*//'`
    package=`grep "kde/add/$base_xml" packages | cut -f1`
    [[ -n "$package" ]] && echo $package >> kde-full.dep.tmp
  done

  for line in `grep "xi:include" $BLFS_XML/kde/devel/devel.xml` ; do
    base_xml=`echo $line | sed 's/^.*href="//;s/".*//'`
    package=`grep "kde/devel/$base_xml" packages | cut -f1`
    [[ -n "$package" ]] && echo $package >> kde-full.dep.tmp
  done

  tac kde-full.dep.tmp > libs/kde-full.dep
  rm kde-full.dep.tmp
}

#--------------------------#
generate_kde_koffice()  {  # KDE full + Koffice
#--------------------------#
  echo -e "koffice\nkde-full\nkde-core" > libs/kde-koffice.dep
}

#--------------------------#
generate_alsa()  {         # ALSA packages
#--------------------------#
  echo -e "alsa-oss\nalsa-firmware\nalsa-tools\nalsa-utils\n\
alsa-plugins\nalsa-lib" > libs/alsa.dep
}

#--------------------------#
generate_xorg7()  {        # Xorg7 packages
#--------------------------#
  echo -e "x-config\nx-setup\nrman\nxterm2\nxorg7-driver\nxorg7-server\nluit\n\
xorg7-font\nxorg7-data\nxorg7-app\nxbitmaps\nmesalib\nlibdrm\n\
xorg7-lib\nxorg7-util\nxorg7-proto" > libs/xorg7.dep
}