#!/bin/sh

# Heavily based on the Slackware 13.0 SlackBuild
#
# Slackware build script for vnstat (http://humdi.net/vnstat/)
#
# Copyright 2008 Corrado Franco (http://www.conraid.net)
# 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.

# Exit on most errors
set -e 

# Set variables:
CWD=$(pwd)

PRGNAME=${PRGNAME:-vnstat}		
VERSION=${VERSION:-1.10}	
ARCH=${ARCH:-i486}		
BUILD=${BUILD:-1}
TAG=${TAG:-cf}		
TMP=${TMP:-/tmp/txz} # If you use /tmp here, don't use --cleanup options	
JOBS=${JOBS:-2}
SOURCE="http://humdi.net/vnstat/vnstat-${VERSION}.tar.gz"
PKG=$TMP/package/$PRGNAME
DOCS="$PKG/usr/doc/$PRGNAME-$VERSION"

# Insert document files in this variable
DOCFILES="CHANGES COPYING FAQ INSTALL README UPGRADE cron examples"	

# Download source, if not exist
if ! [ -e $(basename $SOURCE) ]; then
    wget $SOURCE
fi

# Extract source and prepare:
rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf $PRGNAME-$VERSION

tar xzvf $CWD/$PRGNAME-$VERSION.tar.gz
cd $PRGNAME-$VERSION
                    
# Make sure ownerships and permissions are sane:
chown -R root:root .
chmod -R u+w,go+r-w,a-s .

# Set compiling FLAGS. Thanks to Michiel van Wessem from Slackbuilds.org
case "$ARCH" in
  i486)      sed -i 's#FLAGS = -O2#FLAGS = -O2 -march=i486 -mtune=i686#' $TMP/$PRGNAME-$VERSION/src/Makefile
             ;;
  i686)      sed -i 's#FLAGS = -O2#FLAGS = -O2 -march=i686 -pipe -fomit-frame-pointer#' $TMP/$PRGNAME-$VERSION/src/Makefile
             ;;
  x86_64)    sed -i 's#FLAGS = -O2#FLAGS = -O2 -fPIC -pipe -fomit-frame-pointer#' $TMP/$PRGNAME-$VERSION/src/Makefile
             ;;
esac

# Build and install:
make -j $JOBS
mkdir -p $PKG/etc
make DESTDIR=$PKG install

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

# Add a documentation directory:
mkdir -p ${DOCS}
for i in ${DOCFILES}; do
    if [ -e ${i} ]; then
        if ! [ -L ${i} ]; then
	    cp -a ${i} ${DOCS}
	else
	    cp -LRp ${i} ${DOCS}
        fi
    fi;
done

# Sane man path
if [ -d $PKG/usr/share/man ]; then
    mv $PKG/usr/share/man $PKG/usr
fi

# Compress and link manpages, if any:
if [ -d $PKG/usr/man ]; then
( cd $PKG/usr/man
  find . -type f -exec gzip -9 {} \;
  for i in $( find . -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
)
fi

# Sane path and name for conf e cron files
mv $PKG/etc/vnstat.conf $PKG/etc/vnstat.conf.new
rm -rf $PKG/etc/cron.d
cat $CWD/cron.slackware > $DOCS/cron.slackware

# Add a slackbuild script:
cat $CWD/$PRGNAME.SlackBuild > $DOCS/$PRGNAME.SlackBuild

# Add slack-desc
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/slack-desc > $DOCS/slack-desc

# Add doinst.sh and line to doinst.sh
cat $CWD/doinst.sh > $PKG/install/doinst.sh
echo 'echo ""' >> $PKG/install/doinst.sh
echo "echo 'Add the /usr/doc/$PRGNAME-$VERSION/cron/cron.slackware to your crontab'" >> $PKG/install/doinst.sh

# Create slack-required file:
if [ -x /usr/bin/requiredbuilder ]; then
    requiredbuilder -v -y -s $CWD $PKG
fi
    

# Create package:
cd $PKG
/sbin/makepkg -l y -c n $CWD/$PRGNAME-$VERSION-$ARCH-${BUILD}${TAG}.txz

# Clean file, if option is set: 
if [ "$1" = "--cleanup" ]; then
  rm -rf $TMP
fi
