#!/bin/sh

# Copyright 2008, 2009  Eric Hameleers, Eindhoven, Netherlands
# Copyright 2009  Patrick J. Volkerding, Sebeka, MN, USA
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   CONTRIBUTORS 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.
# -----------------------------------------------------------------------------
#
# Slackware SlackBuild script 
# ===========================
# By:         Eric Hameleers <alien@slackware.com>
# For:        electricsheep
# Descr:      distributed screensaver
# URL:        http://electricsheep.org/
# Needs:      MPlayer (to display the sheep)
# -----------------------------------------------------------------------------

PRGNAM=electricsheep
VERSION=${VERSION:-20090306}
BUILD=${BUILD:-3}

# 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

# Where do we look for sources?
SRCDIR=$(cd $(dirname $0); pwd)

DOCS="COPYING README $SRCDIR/README.slackware"
DOCS_FLAM3="COPYING* README*"
DOCS_FFMPEG="COPYING* CREDITS Changelog MAINTAINERS README"

SOURCE="$SRCDIR/${PRGNAM}-${VERSION}.tar.xz"
SRCURL=""

# Place to build (TMP) package (PKG) and output (OUTPUT) the program:
TMP=${TMP:-/tmp/build}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

# Use the src_checkout() function if no downloadable tarball exists.
# This function checks out sources from SVN/CVS and creates a tarball of them.
src_checkout() {
  # Param #1 : index in the SOURCE[] array.
  # Param #2 : full path to where SOURCE[$1] tarball should be created.
  # Determine the tarball extension:
  PEXT=$(echo "${2}" | sed -r -e 's/.*[^.].(tar.xz|tar.gz|tar.bz2|tgz).*/\1/')
  case "$PEXT" in
    "tar.xz") TARCOMP="J" ;;
    "tar.gz") TARCOMP="z" ;;
    "tgz") TARCOMP="z" ;;
    "tar.bz2") TARCOMP="j" ;;
    *) echo "Archive can only have extension 'tar.xz', '.tar.gz' '.tar.bz2' or '.tgz'" ; exit 1 ;;
  esac
  case ${1} in
  0) # electricsheep-$VERSION
     REV="{${VERSION}}"
     mkdir electricsheep-${VERSION} \
       && cd electricsheep-${VERSION} \
       && svn checkout --revision $REV http://electricsheep.svn.sourceforge.net/svnroot/electricsheep/trunk/client client \
       && svn checkout --revision $REV http://flam3.svn.sourceforge.net/svnroot/flam3/trunk/src flam3 \
       && find . -type d -name '.svn' -depth | xargs rm -rf \
       && chown -R root:root . \
       && ( cd ..; tar -${TARCOMP}cf ${2} electricsheep-${VERSION} )
     cd ..
     rm -rf electricsheep-${VERSION}
     ;;
  *) # do nothing
     ;;
  esac
}
##
## --- with a little luck, you won't have to edit below this point --- ##
##

# Exit the script on errors:
set -e
trap 'echo "$0 FAILED at line ${LINENO}" | tee $OUTPUT/error-${PRGNAM}.log' ERR
# Catch unitialized variables:
set -u
P1=${1:-1}

case "$ARCH" in
  i486)      SLKCFLAGS="-O2 -march=i486 -mtune=i686"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  s390)      SLKCFLAGS="-O2"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  powerpc)   SLKCFLAGS="-O2"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  x86_64)    SLKCFLAGS="-O2 -fPIC"
             SLKLDFLAGS="-L/usr/lib64"; LIBDIRSUFFIX="64"
             ;;
  athlon-xp) SLKCFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  arm)       SLKCFLAGS="-O2 -march=armv4 -mtune=xscale"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  armel)     SLKCFLAGS="-O2 -march=armv4t"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  *)         SLKCFLAGS="-O2"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
esac

# Create working directories:
mkdir -p $OUTPUT          # place for the package to be saved
mkdir -p $TMP/tmp-$PRGNAM # location to build the source
mkdir -p $PKG             # place for the package to be built
rm -rf $PKG/*             # always erase old package's contents
rm -rf $TMP/tmp-$PRGNAM/* # remove the remnants of previous build
rm -rf $OUTPUT/{configure,make,install,error,makepkg}-$PRGNAM.log
                          # remove old log files

# Source file availability:
if ! [ -f ${SOURCE} ]; then
  echo "Source '$(basename ${SOURCE})' not available yet..."
  # Check if the $SRCDIR is writable at all - if not, download to $OUTPUT
  [ -w "$SRCDIR" ] || SOURCE="$OUTPUT/$(basename ${SOURCE})"
  if ! [ "x${SRCURL}" == "x" ]; then
    echo "Will download file to $(dirname $SOURCE)"
    wget -nv -T 20 -O "${SOURCE}" "${SRCURL}" || true
    if [ $? -ne 0 -o ! -s "${SOURCE}" ]; then
      echo "Downloading '$(basename ${SOURCE})' failed.. aborting the build."
      mv -f "${SOURCE}" "${SOURCE}".FAIL
      exit 1
    fi
  else
    # Try if we have a SVN/CVS download routine for ${SOURCE}
    echo "Will checkout sources to $(dirname $SOURCE)"
    src_checkout 0 "${SOURCE}" 2>&1 > $OUTPUT/checkout-$(basename ${SOURCE}).log
  fi
  if [ ! -f "${SOURCE}" -o ! -s "${SOURCE}" ]; then
    echo "File '$(basename ${SOURCE})' not available.. aborting the build."
    exit 1
  fi
fi

if [ "$P1" == "--download" ]; then
  echo "Download complete."
  exit 0
fi

# --- PACKAGE BUILDING ---

echo "++"
echo "|| $PRGNAM-$VERSION"
echo "++"

cd $TMP/tmp-$PRGNAM
echo "Extracting the source archive(s) for $PRGNAM..."
tar -xvf ${SOURCE}
cd ${PRGNAM}-${VERSION}
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 {} \;

echo Building ...
# First the client:
cd client
  # mplayer needs a buffer when reading from a pipe:
  zcat $SRCDIR/electricsheep.mplayer.diff.gz | patch -p2 --verbose || exit 1
  # To prevent an error later on:
  chmod +x ffmpeg/doc/texi2pod.pl
  # We do not use gnome:
  cat $SRCDIR/electricsheep_gnome-open.patch | patch -p1 --verbose \
    2>&1 | tee $OUTPUT/patch-$PRGNAM.log
  # Prevent install errors due to missing gnome
  sed -i -e "/^install-data-local:/,/^$/d" Makefile.in
  LDFLAGS="$SLKLDFLAGS" \
  CXXFLAGS="$SLKCFLAGS" \
  CFLAGS="$SLKCFLAGS" \
  ./configure \
    --prefix=/usr \
    --libdir=/usr/lib${LIBDIRSUFFIX} \
    --mandir=/usr/man \
    --build=$ARCH-slackware-linux \
    2>&1 | tee $OUTPUT/configure-${PRGNAM}.log
  make 2>&1 | tee $OUTPUT/make-${PRGNAM}.log
  make DESTDIR=$PKG install 2>&1 |tee $OUTPUT/install-${PRGNAM}.log
cd ..
# Then the flam3 (fractal flames) renderer:
cd flam3
  LDFLAGS="$SLKLDFLAGS" \
  CXXFLAGS="$SLKCFLAGS" \
  CFLAGS="$SLKCFLAGS" \
  ./configure \
    --prefix=/usr \
    --libdir=/usr/lib${LIBDIRSUFFIX} \
    --mandir=/usr/man \
    --build=$ARCH-slackware-linux \
    2>&1 | tee $OUTPUT/configure-${PRGNAM}.log
  make 2>&1 | tee $OUTPUT/make-${PRGNAM}.log
  make DESTDIR=$PKG install 2>&1 |tee $OUTPUT/install-${PRGNAM}.log
cd ..

# Add documentation:
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION/{flam3,ffmpeg}
( cd client
  cp -a $DOCS $PKG/usr/doc/$PRGNAM-$VERSION
)
( cd client/ffmpeg
  cp -a $DOCS_FFMPEG $PKG/usr/doc/$PRGNAM-$VERSION/ffmpeg
)
( cd flam3
  cp -a $DOCS_FLAM3 $PKG/usr/doc/$PRGNAM-$VERSION/flam3
)
chown -R root:root $PKG/usr/doc/$PRGNAM-$VERSION
find $PKG/usr/doc -type f -exec chmod 644 {} \;

cd client
  # Add xscreensaver module:
  mkdir -p $PKG/usr/share/xscreensaver/config
  install -m644 electricsheep.xml \
    $PKG/usr/share/xscreensaver/config/electricsheep.xml

  # Add the KDE4 screensaver file:
  install -D -m644 electricsheep.desktop.kde \
    ${PKG}/usr/share/kde4/services/ScreenSavers/electricsheep.desktop
  sed -i -e 's/^X-KDE-Category=.*$/X-KDE-Category=Fractals/' \
    ${PKG}/usr/share/kde4/services/ScreenSavers/electricsheep.desktop

  # Add icons:
  mkdir -p $PKG/usr/share/electricsheep
  cp -a electricsheep-{smile,frown}.png $PKG/usr/share/electricsheep/
cd ..

# Compress the man page(s)
if [ -d $PKG/usr/man ]; then
  find $PKG/usr/man -type f -name "*.?" -exec gzip -9f {} \;
  for i in $(find $PKG/usr/man -type l -name "*.?") ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
fi

# Strip binaries:
find $PKG | xargs file | grep -e "executable" -e "shared object" \
  | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

# Add a package description:
mkdir -p $PKG/install
cat $SRCDIR/slack-desc > $PKG/install/slack-desc

# Build the package:
cd $PKG
makepkg --linkadd y --chown n $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}.txz 2>&1 | tee $OUTPUT/makepkg-${PRGNAM}.log
cd $OUTPUT
md5sum ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}.txz > ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}.txz.md5
cd -
cat $PKG/install/slack-desc | grep "^${PRGNAM}" > $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}.txt