#!/bin/bash

##########################################################
#VBuild - Package build script for use on VectorLinux 5.8#
##########################################################
#Eugene Suter <easuter at gmail.com >                    # 
#You are free to modify this scrip under the terms of the#
#GNU General Public License.                             #
##########################################################
#Version 0.2
##########################################################

TMP=/tmp
CWD=`pwd`
NAME=powertop
VERSION=1.2
ARCH=i586
RELEASE=1vl58
#CONFIG_FLAGS=" --prefix=/usr --sysconfdir=/etc --mandir=/usr/man --with-included-gettext"
BUILD_DIR=$TMP/$NAME-package
DESTDIR=$BUILD_DIR/dest
REBUILD_DIR=$BUILD_DIR/rebuild
TARBALL_NAME=$NAME-$VERSION.tar.*
#Chose between tgz, tlz org tbz package formats here.
PKG_FORMAT=tlz
PKG_DEST=$TMP/finished-packages
PKG=$NAME-$VERSION-$ARCH-$RELEASE.$PKG_FORMAT
#Chose either Y or N
USE_CHECKINSTALL=Y
CLEANUP=Y
#Packager name
VL_PACKAGER=easuter

##Funtions go here:

#See if requiredbuilder is installed

#Check if script is being run with root privilages

function authenticate()
{

if [ $UID != 0 ]; then
	echoc "You need to be root to run this script." red
	exit
fi

}

#Make sure the package has a destination directory

function chk_destination()
{

if [ ! -d $PKG_DEST ]; then
	mkdir -p $PKG_DEST
fi

}

#Clean out any possible interfering files and directories
# and create build directories

function mk_build_dirs()
{

rm -rf $BUILD_DIR

mkdir -p $BUILD_DIR
mkdir -p $REBUILD_DIR
mkdir -p $DESTDIR

}


#Get the source code prepared

function prepare_src()
{

cd $BUILD_DIR
cp $CWD/$TARBALL_NAME ./
tar xvf $BUILD_DIR/$TARBALL_NAME
cd $NAME-$VERSION 

}


#Do some custom stuff here (like headers hacking, custom makefiles, etc)

#function do_custom()
#{
#
#}
#Connfigure the source code

function config_src()
{

#Start with an architecture breakdown:
if [ $ARCH = "i586" ]; then
	export CFLAGS="-O2 -mtune=i686 -march=i586"
fi

if [ $ARCH = "i486" ]; then
	export CFLAGS="-O2 -mtune=i686 -march=i486"
fi 

if [ $ARCH = "i386" ]; then
	export CFLAGS="-O2 -mtune=i686 -march=i386"
fi

export CXXFLAGS="$CFLAGS"

#Give root ownership of the files:
chown -R root.root ./

#Powertop does not use a configure script for its souces.
#./configure $CONFIG_FLAGS

}

#Append configure switches and environment info to the package
#description:

function mk_config_info()
{

cp $CWD/slack-desc ./description-pak

cat >> description-pak << EOF

#----------------------------------------

BUILDDATE: `date`
PACKAGER:  $VL_PACKAGER
HOST:      `uname -srm`
DISTRO:    `cat /etc/vector-version`
CFLAGS:    $CFLAGS
CONFIGURE: `awk "/\.\/configure\ /" config.log`

EOF

}

#Build the sources and exit if it fails.

function build()
{

make

if ( ! make ); then
	echoc "Make failed!" red
	exit
fi

}

#Build the package (checkinstall is the default option, but using the
#"traditional" method is also available

function mk_package()
{

if [ $USE_CHECKINSTALL = "Y" ]; then
	
	if [ $PKG_FORMAT = "tlz" ]; then
		CHKINST_TYPE="-L"
	elif [ $PKG_FORMAT = "tgz" ]; then
		CHKINST_TYPE="-G"
	else
		CHKINST_TYPE="-B"
	fi

	checkinstall $CHKINST_TYPE -y --pkgarch=$ARCH --pkgversion=$VERSION --pkgrelease=$RELEASE --pkgname=$NAME

	if [ ! -f $PKG ]; then
		echoc "Checkinstall failed to create the package!"
		exit
	fi

else
	
	make DESTDIR=$DESTDIR install
	mkdir $DESTDIR/install
	cp ./description-pak $DESTDIR/install/slack-desc
	cd $DESTDIR
	
	requiredbuilder -v -y ./
	
	#Strip debug code from executables and libraries (thanks P.Volkerding
	#for this bit of code)
	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
	
	makepkg -l y -c n $PKG

fi

}

#If a package built with checkinstall needs to be exploded to include
#extra files, then this function will do it

function rebuild_pkg()
{

cp $PKG $REBUILD_DIR
cd $REBUILD_DIR

explodepkg $PKG
rm $PKG

#Do whatever you like here
#
#

makepkg $PKG

}

##The actual script only starts here :)


if [ $USE_CHECKINSTALL = "N" ]; then
	if [ ! -e /usr/bin/requiredbuilder ]; then
		echoc "Requiredbuilder is not installed." red
		echoc "Sorry boss, won't build the package!" red
		exit
	fi
fi

authenticate
chk_destination
mk_build_dirs
#do_custom
prepare_src
config_src
mk_config_info
build
mk_package

#rebuild_pkg

cp $PKG $PKG_DEST 

echoc "$NAME package built successfully!
It is in $PKG_DEST" green

if [ $CLEANUP = "Y" ]; then
	rm -rf $BUILD_DIR
fi

#EOF