#!/bin/sh
# Copyright 2011  Patrick J. Volkerding, Sebeka, MN, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Adapted by Eric Hameleers <alien@slackware.com> from the modular x.org build.

# To build only a single package group, specify it as $1, like:
#   ./KDE.SlackBuild kdeedu
# To build only a single package, specify both the source directory
# and the name of the package, like:
#   ./KDE.SlackBuild kdeedu:marble
#   ./KDE.SlackBuild kdebindings:perlqt,perlkde


CLEANUP=${CLEANUP:-"yes"} # clean up build directory after successful build.
PRECHECK=${PRECHECK:-"no"} # don't let the script check the available sources.
CHECKOUT=${CHECKOUT:-"no"} # don't let the script checkout missing sources.

KDEGITURI="git://anongit.kde.org"

pkgbase() {
  PKGEXT=$(echo $1 | rev | cut -f 1 -d . | rev)
  case $PKGEXT in
  'gz' )
    PKGRETURN=$(basename $1 .tar.gz)
    ;;
  'bz2' )
    PKGRETURN=$(basename $1 .tar.bz2)
    ;;
  'lzma' )
    PKGRETURN=$(basename $1 .tar.lzma)
    ;;
  'xz' )
    PKGRETURN=$(basename $1 .tar.xz)
    ;;
  *)
    PKGRETURN=$(basename $1)
    ;;
  esac
  echo $PKGRETURN
}

# Set initial variables:
CWD=$(pwd)
TMP=${TMP:-/tmp}

# Set up a few useful functions:

fix_perms() {
  target_dir=$1
  [ -z "$target_dir" ] && target_dir='.'

  chown -R root:root $target_dir
  find $target_dir \
   \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
   -exec chmod 755 {} \; -o \
   \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
   -exec chmod 644 {} \;
}

strip_binaries() {
  target_dir=$1
  [ -z "$target_dir" ] && target_dir='.'

  find $target_dir | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find $target_dir | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find $target_dir | xargs file | grep "current ar archive" | grep ELF | cut -f 1 -d : | xargs strip -g 2> /dev/null
}

process_man_pages() {
  # Compress and if needed symlink the man pages:
  if [ -d usr/man ]; then
    ( cd usr/man
      for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.*
      )
      done
    )
  fi
}

process_info_pages() {
  # Compress info pages and purge "dir" file from the package:
  if [ -d usr/info ]; then
    ( cd usr/info
      rm -f dir
      gzip -9 *
    )
  fi
}

no_usr_share_doc() {
  # If there are docs, move them:
  if [ -d usr/share/doc ]; then
    mkdir -p usr/doc
    mv usr/share/doc/* usr/doc
    rmdir usr/share/doc
  fi
}

precheck() {
  # See if the sources we have match the module components we want to build:
  RETVAL=0

  for SRCFILE in $(find $CWD/src -name "*.tar.?z*") ; do
    if ! cat modules/* |grep -v "^#" |grep -wq $(echo $(basename $SRCFILE) | rev | cut -f2- -d- | rev) ; then
      echo "Source file '$(basename $SRCFILE)' is not mentioned in 'modules' !"
      RETVAL=1
    fi
  done

  for MODULE in $(cat $CWD/modules/* | grep -v "^#") ; do
    #if [ -z "$(find $CWD/src -name ${MODULE}-*)" ] ; then
    if [ -z "$(find $CWD/src -name $MODULE-*.tar.* |grep -E "$MODULE-[^-]+.tar.*$")" ] ; then
      echo "Module '$MODULE' does not have a matching source tarball !"
      if [ "$CHECKOUT" = "yes" -o "$CHECKOUT" = "YES" ]; then
        echo "Checking out KDE component at branch '$VERSION'."
        git archive --format=tar --prefix {$MODULE}-${VERSION}/ --remote ${KDEGITURI}/${MODULE}.git v${VERSION} | xz -c > $CWD/src/${MODULE}-${VERSION}.tar.xz
        RETVAL=$?
        if [ $RETVAL -ne 0 ]; then
          echo "Error while checking out '$MODULE' !"
          mv $CWD/src/${MODULE}-${VERSION}.tar.xz $CWD/src/${MODULE}-${VERSION}.tar.xz.failed
        fi
      else
        RETVAL=1
      fi
    fi
    # A missing slack-desc counts as fatal even if the program may end up
    # inside the big meta-package.
    if [ -z "$(find $CWD/slack-desc -name ${MODULE})" ] ; then
      echo "Module '$MODULE' does not have a slack-desc file !"
      RETVAL=1
    fi
  done

  if [ $RETVAL -eq 0 ]; then
    echo "Check complete, build starts in 5 seconds"
    sleep 5
  else
    exit 1
  fi
}

# Support function builds one complete module (like 'kdelibs'), or
# exactly one package which is part of a module (like 'okular'):
build_mod_pkg () {
  kde_module=$1
  kde_pkg=$2

  cd $CWD/modules

  # See if $kde_module is a module name like "kdeadmin":
  if [ ! -z "$kde_module" ]; then
    if [ ! -f "$kde_module" ]; then
      return
    fi
  fi
  PKG=${SLACK_KDE_BUILD_DIR}/${kde_module}/package-${kde_module}
  rm -rf $PKG
  mkdir -p $PKG
  ( for PKGNAME in $(cat $kde_module |grep -v "^$" |grep -v "^#") ; do
      # Find the full source filename - yeah ugly, but I had two goals:
      # 1- source tarball can be in a random subdirectory of src/
      # 2- differentiate between e.g. 'kdepim' and 'kdepim-runtime'
      kde_src=$(basename $(find $CWD/src -name "$PKGNAME-*.tar.?z*" |grep -E "$PKGNAME-[^-]+.tar.*$") 2>/dev/null)
      if [ "x$kde_src" = "x" ]; then
        echo "** Did not find '$PKGNAME' in src"
        continue
      fi
      # Reset $PKGARCH to its initial value:
      PKGARCH=$ARCH
      # Perhaps $PKGARCH should be something different:
      if grep -wq "^$PKGNAME" ${CWD}/noarch ; then
        PKGARCH=noarch
      fi 
      if grep -wq "^$PKGNAME" ${CWD}/package-blacklist ; then
        continue
      fi
      cd $SLACK_KDE_BUILD_DIR/${kde_module}
      # If $kde_pkg is set, we only want to build one package:
      if [ ! -z "$kde_pkg" ]; then
        if [ "$kde_pkg" = "$PKGNAME" ]; then
          # Set $PKG to a private dir for the modular package build:
          PKG=$SLACK_KDE_BUILD_DIR/${kde_module}/package-$PKGNAME
          rm -rf $PKG
          mkdir -p $PKG
        else
          continue
        fi
      else
        echo
        echo "Building from source ${kde_src}"
        echo
      fi
      if grep -wq "^$PKGNAME" ${CWD}/modularize ; then
        # Set $PKG to a private dir for the modular package build:
        PKG=$SLACK_KDE_BUILD_DIR/${kde_module}/package-$PKGNAME
        rm -rf $PKG
        mkdir -p $PKG
      fi

      # Let's figure out the version number on the modular package:
      MODULAR_PACKAGE_VERSION=$(echo $kde_src | rev | cut -f 3- -d . | cut -f 1 -d - | rev)

      rm -rf $(pkgbase $kde_src)
      tar xf $(find $CWD/src -name ${kde_src}) || exit 1
      cd $(pkgbase $kde_src) || exit 1

      fix_perms

      # If any patches are needed, call this script to apply them:
      if [ -r $CWD/patch/${PKGNAME}.patch ]; then
        . $CWD/patch/${PKGNAME}.patch || exit 1
      fi

      # If there's any pre-install things to do, do them:
      if [ -r $CWD/pre-install/${PKGNAME}.pre-install ]; then
        . $CWD/pre-install/${PKGNAME}.pre-install
      fi

      # Run cmake, using custom cmake script if needed:
      if [ -r $CWD/cmake/${PKGNAME} ]; then
        . $CWD/cmake/${PKGNAME}
      else
        # This is the default configure script:
        . $CWD/cmake/cmake
      fi

      make $NUMJOBS || make || exit 1
      make install DESTDIR=$PKG || exit 1

      # Back to source toplevel builddir, since cmake may have run in a subdir:
      cd $SLACK_KDE_BUILD_DIR/${kde_module}/$(pkgbase $kde_src)

      mkdir -p $PKG/usr/doc/${PKGNAME}-${MODULAR_PACKAGE_VERSION}
      # Use specific documentation files if available, else use a default set:
      if [ -r $CWD/docs/${PKGNAME} ]; then
        cp -a $(cat $CWD/docs/${PKGNAME}) \
          $PKG/usr/doc/${PKGNAME}-${MODULAR_PACKAGE_VERSION}
      else
        cp -a \
          AUTHORS* CONTRIBUTING* COPYING* HACKING* \
          INSTALL* MAINTAINERS README* NEWS* TODO* \
          $PKG/usr/doc/${PKGNAME}-${MODULAR_PACKAGE_VERSION}
          # If there's a ChangeLog, installing at least part of the recent
          # history is useful, but don't let it get totally out of control:
          if [ -r ChangeLog ]; then
            DOCSDIR=$(echo $PKG/usr/doc/${PKGNAME}-$MODULAR_PACKAGE_VERSION)
            cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
            touch -r ChangeLog $DOCSDIR/ChangeLog
          fi
      fi

      # Get rid of zero-length junk files:
      find $PKG/usr/doc/${PKGNAME}-$MODULAR_PACKAGE_VERSION -type f -size 0 -exec rm --verbose "{}" \;
      rmdir --verbose $PKG/usr/doc/${PKGNAME}-$MODULAR_PACKAGE_VERSION 2> /dev/null

      # Strip binaries:
      strip_binaries $PKG

      # If there's any special post-install things to do, do them:
      if [ -r $CWD/post-install/${PKGNAME}.post-install ]; then
        . $CWD/post-install/${PKGNAME}.post-install
      fi

      # If this package requires some doinst.sh material, add it here:
      if [ -r $CWD/doinst.sh/${PKGNAME} ]; then
        mkdir -p $PKG/install
        cat $CWD/doinst.sh/${PKGNAME} \
          | sed -e "s#usr/lib#usr/lib${LIBDIRSUFFIX}#g" \
          >> $PKG/install/doinst.sh
      fi

      # If this is a modular package, build it here:
      if [ -d $SLACK_KDE_BUILD_DIR/${kde_module}/package-$PKGNAME ]; then
        cd $PKG
        process_man_pages
        process_info_pages
        no_usr_share_doc          
        mkdir -p $PKG/install
        if [ -r $CWD/slack-desc/${PKGNAME} ]; then
          cat $CWD/slack-desc/${PKGNAME} > $PKG/install/slack-desc
        else
          touch $PKG/install/slack-desc-missing
        fi
        if [ -r $CWD/build/${PKGNAME} ]; then
          MODBUILD=$(cat $CWD/build/${PKGNAME})
        else
          MODBUILD=$BUILD
        fi
        if [ -r $CWD/makepkg/${PKGNAME} ]; then
          BUILD=$MODBUILD . $CWD/makepkg/${PKGNAME}
        else
          /sbin/makepkg -l y -c n ${SLACK_KDE_BUILD_DIR}/${kde_module}/${PKGNAME}-${MODULAR_PACKAGE_VERSION}-${PKGARCH}-${MODBUILD}.txz
        fi
        # We will continue with the fresh packages installed:
        upgradepkg --install-new --reinstall ${SLACK_KDE_BUILD_DIR}/${kde_module}/${PKGNAME}-${MODULAR_PACKAGE_VERSION}-${PKGARCH}-${MODBUILD}.txz
        # Keep MIME database current:
        /usr/bin/update-mime-database /usr/share/mime 1>/dev/null 2>/dev/null &
      fi

      # Reset $PKG to assume we're building the whole source dir:
      PKG=${SLACK_KDE_BUILD_DIR}/${kde_module}/package-${kde_module}

    done

    # Nothing here?  Must have been fully modular. :-)
    if [ ! -d ${SLACK_KDE_BUILD_DIR}/${kde_module}/package-${kde_module}/usr ]; then
      return
    fi

    # Build a "<kde_module>" package for anything that wasn't built modular:
    # It's safer to consider these to have binaries in them. ;-)
    PKGARCH=$ARCH
    cd $PKG

    process_man_pages
    process_info_pages
    no_usr_share_doc

    # If there are post-install things to do for the combined package,
    # we do them here.  This could be used for things like making a
    # VERSION number for a combined package.  :-)
    if [ -r $CWD/post-install/${kde_module}.post-install ]; then
      . $CWD/post-install/${kde_module}.post-install
    fi
    mkdir -p $PKG/install
    if [ -r $CWD/slack-desc/${kde_module} ]; then
      cat $CWD/slack-desc/${kde_module} > $PKG/install/slack-desc
    else
      touch $PKG/install/slack-desc-missing
    fi
    if [ -r $CWD/doinst.sh/${kde_module} ]; then
      cat $CWD/doinst.sh/${kde_module} \
        | sed -e "s#usr/lib#usr/lib${LIBDIRSUFFIX}#g" \
        >> $PKG/install/doinst.sh
    fi
    if [ -r $CWD/build/${kde_module} ]; then
      SRCDIRBUILD=$(cat $CWD/build/${kde_module})
    else
      SRCDIRBUILD=$BUILD
    fi
    if [ -r $CWD/makepkg/${kde_module} ]; then
      BUILD=$SRCDIRBUILD . $CWD/makepkg/${kde_module}
    else
      /sbin/makepkg -l y -c n ${SLACK_KDE_BUILD_DIR}/${kde_module}/${kde_module}-${VERSION}-${PKGARCH}-${SRCDIRBUILD}.txz
    fi
    # We will continue with the fresh packages installed:
    upgradepkg --install-new --reinstall ${SLACK_KDE_BUILD_DIR}/${kde_module}/${kde_module}-${VERSION}-${PKGARCH}-${SRCDIRBUILD}.txz
    # Keep MIME database current:
    /usr/bin/update-mime-database /usr/share/mime 1>/dev/null 2>/dev/null &
  )
}

# Process the module queue. Format is:
# module[:subpackage[,subpackage]] [module...]
deterministic_build() {
  RET=0
  for ENTRY in $1 ; do
    KDE_MOD=$(echo "$ENTRY": | cut -f1 -d:)
    KDE_PKGS=$(echo "$ENTRY": | cut -f2 -d:)
    if [ -z "$KDE_PKGS" ]; then
      build_mod_pkg $KDE_MOD
      let RET=$RET+$?
    else
      for KDE_PKG in $(echo $KDE_PKGS |tr ',' ' ') ; do
        build_mod_pkg $KDE_MOD $KDE_PKG
        let RET=$RET+$?
      done
    fi
  done

  return $RET
}

# MAIN PART #

# Import the build configuration options for as far as they are not already set:
[ -r ./KDE.options ] && . ./KDE.options

# This avoids compiling a version number into KDE's .la files:
QTDIR=/usr/lib${LIBDIRSUFFIX}/qt ; export QTDIR

# Get the kde environment variables
[ -d post-install/kdebase ] && eval $(sed -e "s#/lib#/lib${LIBDIRSUFFIX}#" ./post-install/kdebase/profile.d/kde.sh)

# Where we are going to do all the hard labour:
SLACK_KDE_BUILD_DIR=$TMP/kde-build
mkdir -p $SLACK_KDE_BUILD_DIR

# Yes, we know kde-workspace is built twice.  kdebase needs the
#   plasma bits from it, and then we build it again for good measure...
KDEMODS=" \
  kdelibs \
  kdepimlibs \
  kdebase \
  kdesdk \
  kdegraphics \
  kdebindings \
  kdebase:kde-workspace \
  kdeaccessibility \
  kdeutils \
  kdemultimedia \
  kdenetwork \
  oxygen-icons \
  kdeadmin \
  kdeartwork \
  kdegames \
  kdetoys \
  kdepim \
  kdepim-runtime \
  kdeedu \
  kdewebdev \
  kdeplasma-addons \
  polkit-kde \
  "

# Allow for specification of individual packages to be built:
if [ -z "$1" ]; then
  MODQUEUE=$KDEMODS
else
  MODQUEUE="$*"
fi

# If requested, check if
# sources, module definitions and slack-desc are complete and matching:
if [ "$PRECHECK" = "yes" -o "$PRECHECK" = "YES" ]; then
  precheck
  echo "Sleeping for 10 seconds; press Ctrl-C if you want to abort compilation."
  sleep 10
fi

# And finally, start working!
for module in \
  $MODQUEUE ;
do
  echo "SlackBuild processing module '$module'"
  deterministic_build $module
  if [ $? = 0 ]; then
    # Move the created packages up into the KDE build directory:
    mv ${SLACK_KDE_BUILD_DIR}/$(echo $module |cut -f1 -d:)/*.t?z ${SLACK_KDE_BUILD_DIR}/
    if [ "$CLEANUP" = "yes" -o "$CLEANUP" = "YES" ]; then
      # Clean out package and build directories:
      rm -rf ${SLACK_KDE_BUILD_DIR}/$(echo $module |cut -f1 -d:)
    fi
  else
    echo "${module} failed to build."
    exit 1
  fi
  cd - ;
done

exit 0