#!/bin/sh
# Copyright 2007-2014  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.

# To build only a single package group, specify it as $1, like:
# ./x11.SlackBuild lib
# To build only a single package, specify both the source directory
# and the name of the package, like:
# ./x11.SlackBuild lib libX11

# Upgrade packages as they are built.
# Default is to upgrade new packages (UPGRADE_PACKAGES=yes).
# To install ALL newly built packages (even if they are already installed),
# use UPGRADE_PACKAGES=always
# To not upgrade, pass UPGRADE_PACKAGES=no
UPGRADE_PACKAGES=${UPGRADE_PACKAGES:-yes}

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}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i486 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

# A lot of this stuff just controls the package names this time:
VERSION=${VERSION:-7.5}
BUILD=${BUILD:-1}
PKGARCH=$ARCH
NUMJOBS=${NUMJOBS:-" -j7 "}

if [ "$ARCH" = "x86_64" ]; then
  LIBDIRSUFFIX="64"
else
  LIBDIRSUFFIX=""
fi

# Set up a few useful functions:

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

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
}

# Set the compile options for the $ARCH being used:
. $CWD/arch.use.flags

SLACK_X_BUILD_DIR=$TMP/x11-build
mkdir -p $SLACK_X_BUILD_DIR

# Better have some binaries installed first, as this may not be
# in the "magic order".  I built mine by hand through trial-and-error
# before getting this script to work.  It wasn't that hard...  I think.  ;-)
( cd src
  for x_source_dir in proto data util xcb lib app doc xserver driver font ; do
    # See if $1 is a source directory like "lib":
    if [ ! -z "$1" ]; then
      if [ ! "$1" = "${x_source_dir}" ]; then
        continue
      fi
    fi
    PKG=${SLACK_X_BUILD_DIR}/package-${x_source_dir}
    rm -rf $PKG
    mkdir -p $PKG
    ( cd $x_source_dir
      for x_pkg in *.tar.?z* ; do
        # Reset $PKGARCH to its initial value:
        PKGARCH=$ARCH
        PKGNAME=$(echo $x_pkg | rev | cut -f 2- -d - | rev)
        # 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_X_BUILD_DIR
        # If $2 is set, we only want to build one package:
        if [ ! -z "$2" ]; then
          if [ "$2" = "$PKGNAME" ]; then
            # Set $PKG to a private dir for the modular package build:
            PKG=$SLACK_X_BUILD_DIR/package-$PKGNAME
            rm -rf $PKG
            mkdir -p $PKG
          else
            continue
          fi
        else
          echo
          echo "Building from source ${x_pkg}"
          echo
        fi
        if grep -wq "^$PKGNAME" ${CWD}/modularize ; then
          # Set $PKG to a private dir for the modular package build:
          PKG=$SLACK_X_BUILD_DIR/package-$PKGNAME
          rm -rf $PKG
          mkdir -p $PKG
        fi

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

        rm -rf $(pkgbase $x_pkg)
        tar xf $CWD/src/${x_source_dir}/${x_pkg} || exit 1
        cd $(pkgbase $x_pkg) || 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
        fi

        # I heard somewhere that -O2 breaks some chipset or another.  If you encounter
        # problems, please contact volkerdi@slackware.com.  Thanks! :-)

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

        if ! make $NUMJOBS ; then
          touch ${SLACK_X_BUILD_DIR}/${PKGNAME}.failed
          continue
        fi

        make install DESTDIR=$PKG

        mkdir -p $PKG/usr/doc/${PKGNAME}-${MODULAR_PACKAGE_VERSION}
        cp -a \
          AUTHORS* COPYING* INSTALL* 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

        # 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:
        ( cd $PKG
          find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
          find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
          find . | xargs file | grep "current ar archive" | grep ELF | cut -f 1 -d : | xargs strip -g 2> /dev/null
        )

        # If there's any special post-install things to do, do them:
        if [ -r $CWD/post-install/${PKGNAME}.post-install ]; then
          RUNSCRIPT=$(mktemp -p $TMP) || exit 1
          cat $CWD/post-install/${PKGNAME}.post-install \
            | sed -e "s#usr/lib#usr/lib${LIBDIRSUFFIX}#g" > $RUNSCRIPT
          . $RUNSCRIPT
          rm -f $RUNSCRIPT
        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 $SLACK_X_BUILD_DIR/package-$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 ${SLACK_X_BUILD_DIR}/${PKGNAME}-${MODULAR_PACKAGE_VERSION}-${PKGARCH}-${MODBUILD}.txz
            if [ "$UPGRADE_PACKAGES" = "yes" ]; then
              /sbin/upgradepkg --install-new ${SLACK_X_BUILD_DIR}/${PKGNAME}-${MODULAR_PACKAGE_VERSION}-${PKGARCH}-${MODBUILD}.txz
            elif [ "$UPGRADE_PACKAGES" = "always" ]; then
              /sbin/upgradepkg --install-new --reinstall ${SLACK_X_BUILD_DIR}/${PKGNAME}-${MODULAR_PACKAGE_VERSION}-${PKGARCH}-${MODBUILD}.txz
            fi
          fi
        fi

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

      done

      # Nothing here?  Must have been fully modular. :-)
      if [ ! -d ${SLACK_X_BUILD_DIR}/package-${x_source_dir}/etc -a \
        ! -d ${SLACK_X_BUILD_DIR}/package-${x_source_dir}/usr ]; then
        continue
      fi

      # Build an "x11-<sourcedir>" 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 $CWD/post-install/x11-${x_source_dir}.post-install ]; then
        RUNSCRIPT=$(mktemp -p $TMP) || exit 1
        cat $CWD/post-install/x11-${x_source_dir}.post-install \
          | sed -e "s#usr/lib#usr/lib${LIBDIRSUFFIX}#g" > $RUNSCRIPT
        . $RUNSCRIPT
        rm -f $RUNSCRIPT
      fi
      mkdir -p $PKG/install
      if [ -r $CWD/slack-desc/x11-${x_source_dir} ]; then
        cat $CWD/slack-desc/x11-${x_source_dir} > $PKG/install/slack-desc
      else
        touch $PKG/install/slack-desc-missing
      fi
      if [ -r $CWD/doinst.sh/x11-${x_source_dir} ]; then
        cat $CWD/doinst.sh/x11-${x_source_dir} \
          | sed -e "s#usr/lib#usr/lib${LIBDIRSUFFIX}#g" \
          >> $PKG/install/doinst.sh
      fi
      if [ -r $CWD/build/x11-${PKGNAME} ]; then
        SRCDIRBUILD=$(cat $CWD/build/x11-${PKGNAME})
      else
        SRCDIRBUILD=$BUILD
      fi
      if [ -r $CWD/makepkg/${PKGNAME} ]; then
        BUILD=$MODBUILD . $CWD/makepkg/${PKGNAME}
      else
        /sbin/makepkg -l y -c n ${SLACK_X_BUILD_DIR}/x11-${x_source_dir}-${VERSION}-${PKGARCH}-${SRCDIRBUILD}.txz
        if [ "$UPGRADE_PACKAGES" = "yes" ]; then
          /sbin/upgradepkg --install-new ${SLACK_X_BUILD_DIR}/x11-${x_source_dir}-${VERSION}-${PKGARCH}-${SRCDIRBUILD}.txz
        elif [ "$UPGRADE_PACKAGES" = "always" ]; then
          /sbin/upgradepkg --install-new --reinstall ${SLACK_X_BUILD_DIR}/x11-${x_source_dir}-${VERSION}-${PKGARCH}-${SRCDIRBUILD}.txz
        fi
      fi
    )
  done
)

exit 0

# I don't think I'll be using the following stuff, since I went for the latest in
# "individual", rather than a release.  That was mostly because version 7.1 depends
# on a version of Mesa that won't build against kernel headers this new (&etc.).

# If environment variable "REFRESH" is exported, start by refreshing the source tree:
# export REFRESH yes
if [ ! -z "$REFRESH" ]; then
  # Only works once, unless you uncomment above.
  unset REFRESH
  ( cd patches
    lftp -c \
    "lftp ftp://ftp.x.org:/pub/X11R7.1/patches
     mirror --delete --dereference .
     exit"
    chmod 644 *
  )
  ( cd src
    mkdir -p update everything
    for dir in app data deprecated doc driver extras font lib proto util xserver ; do
      # We won't really download "update", as problems ensue.  Plus, --dereference is
      # bringing us updated files when needed, so it's redundant (like "everything").
      if [ ! -d $dir ]; then
        mkdir $dir
      fi
      ( cd $dir
        lftp -c \
        "lftp ftp://ftp.x.org:/pub/X11R7.1/src/$dir
         mirror -c --delete --dereference --include-glob "*.tar.bz2" .
         exit"
        chmod 644 *
      )
    done
  )
fi