#!/bin/sh
# $Id$
# Copyright 2010  Eric Hameleers, Eindhoven, NL
# 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:        rss-glx
# Descr:      Really Slick Screensavers Port to GLX
# URL:        http://rss-glx.sourceforge.net/
# Needs:      
# Changelog:  
# 0.9.1-1:    06/Nov/2010 by Eric Hameleers <alien@slackware.com>
#             * Initial build.
# 
# Run 'sh rss-glx.SlackBuild' to build a Slackware package.
# The package (.tgz) and .txt file as well as build logs are created in /tmp .
# Install it using 'installpkg'. 
#
# -----------------------------------------------------------------------------

# Set initial variables:

PRGNAM=rss-glx
VERSION=${VERSION:-0.9.1}
BUILD=${BUILD:-1}
NUMJOBS=${NUMJOBS:" -j4 "}
TAG=${TAG:-alien}

DOCS="AUTHORS COPYING ChangeLog INSTALL NEWS README README.xscreensaver"

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

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

SOURCE="$SRCDIR/${PRGNAM}_${VERSION}.tar.bz2"
SRCURL="http://downloads.sourceforge.net/project/${PRGNAM}/${PRGNAM}/${VERSION}/${PRGNAM}_${VERSION}.tar.bz2"

##
## --- with a little luck, you won't have to edit below this point --- ##
##

# 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

case "$ARCH" in
  i486)      SLKCFLAGS="-O2 -march=i486 -mtune=i686"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  x86_64)    SLKCFLAGS="-O2 -fPIC"
             SLKLDFLAGS="-L/usr/lib64"; LIBDIRSUFFIX="64"
             ;;
  *)         SLKCFLAGS="-O2"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
esac

# 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}

# Save old umask and set to 0022:
_UMASK_=$(umask)
umask 0022

# 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 ${SOURCE} ]; then
  if ! [ "x${SRCURL}" == "x" ]; then
    # Check if the $SRCDIR is writable at all - if not, download to $OUTPUT
    [ -w "$SRCDIR" ] || SOURCE="$OUTPUT/$(basename $SOURCE)"
    echo "Source '$(basename ${SOURCE})' not available yet..."
    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}" "${SOURCE}".FAIL
      exit 1
    fi
  else
    echo "File '$(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 .
chmod -R u+w,go+r-w,a+X-s .

echo Building ...

# Do we have KDE4 ?
KDE4PREF=$(kde4-config --prefix) || true
if [ ! -z "$KDE4PREF" ]; then
  KDEOPTS="--with-kdessconfigdir=${KDE4PREF}/share/kde4/services/ScreenSavers"
else
 KDEOPTS=""
fi

# Prefix the screensaver executables' names with "rss-",
# so that they will not conflict with some of the KDE screensavers:
LDFLAGS="$SLKLDFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --bindir=/usr/libexec/xscreensaver \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --localstatedir=/var \
  --sysconfdir=/etc \
  --enable-shared=yes \
  --enable-static=no \
  --with-configdir=/usr/share/xscreensaver/config \
  ${KDEOPTS} \
  --program-prefix="rss-" \
  --program-suffix= \
  --build=$ARCH-slackware-linux \
  2>&1 | tee $OUTPUT/configure-${PRGNAM}.log

make $NUMJOBS 2>&1 | tee $OUTPUT/make-${PRGNAM}.log
make DESTDIR=$PKG install 2>&1 | tee $OUTPUT/install-${PRGNAM}.log

# Because of our name prefixing we need to fix several files in the package:
RSSBINS=$(ls --indicator-style=none $PKG/usr/libexec/xscreensaver/ | grep -v 'install.pl' | sed -e 's#rss-##')
for FILE in $RSSBINS ; do
  mv $PKG/usr/share/xscreensaver/config/{,rss-}${FILE}.xml
  mv ${PKG}${KDE4PREF}/share/kde4/services/ScreenSavers/{,rss-}${FILE}.desktop
  sed -i -e "s/$FILE/rss-$FILE/g" $PKG/usr/share/xscreensaver/config/rss-${FILE}.xml
  if [ ! -z "$KDE4PREF" ]; then
    sed -i -e "s/$FILE/rss-$FILE/g" ${PKG}${KDE4PREF}/share/kde4/services/ScreenSavers/rss-${FILE}.desktop
  fi
  sed -i "s/$FILE/rss-$FILE/g" $PKG/usr/libexec/xscreensaver/rss-rss-glx_install.pl
done

# Create a doinst.sh script:
mkdir -p $PKG/install
cat <<EOT >>$PKG/install/doinst.sh
for FILE in $(echo $RSSBINS) ; do
  # Add our screensavers to the xscreensaver global configuration file:
  if ! grep -q rss-\$FILE etc/X11/app-defaults/XScreenSaver ; then
    # We have to do some magic to extract proper strings from the perl script:
    XSCRLINE="\$(grep \$FILE usr/doc/$PRGNAM-$VERSION/rss-glx_install.pl |cut -d= -f2 |cut -d\' -f2- |rev |cut -d\' -f2- |rev)"
    sed -i -e "/^\*programs/{N;s#\\\$#\n\${XSCRLINE}#}" etc/X11/app-defaults/XScreenSaver
  fi
done

EOT

# Add documentation:
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a $DOCS $PKG/usr/doc/$PRGNAM-$VERSION || true
# This one does not need to be in the bin directory:
mv $PKG/usr/libexec/xscreensaver/rss-rss-glx_install.pl $PKG/usr/doc/$PRGNAM-$VERSION/rss-glx_install.pl
cat $SRCDIR/$(basename $0) > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
chown -R root:root $PKG/usr/doc/$PRGNAM-$VERSION
find $PKG/usr/doc -type f -exec chmod 644 {} \;

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

# 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}-${BUILD}${TAG}.${PKGTYPE:-tgz} 2>&1 | tee $OUTPUT/makepkg-${PRGNAM}.log
cd $OUTPUT
md5sum ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-tgz} > ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-tgz}.md5
cd -
cat $PKG/install/slack-desc | grep "^${PRGNAM}" > $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.txt

# Restore the original umask:
umask ${_UMASK_}