#!/bin/bash 
#(C)DatuX 2008 all rights reserved

# Gets a .deb debian package from a packagename out of the svn tree.



cd `dirname $0`
CWD=`pwd`
PKG=$1
TARGET=$2


if ! [ -e  "$TARGET" ]; then
	echo "Usage: ";
	echo " $0 packagename /path/to/target/dir"
	echo 
	echo "This will convert the syn3 svn-package to a debian package and put it in the target dir."
	echo "Also outputs a .deb.syn3 file which is used by $0 to allow intelligent caching."
	exit 1	
fi

mkdir -p $TARGET 2>/dev/null

if TAR=`./findfile "$PKG.pkg"`; then
    BASEPATH=`echo $TAR| sed 's/.pkg$//'` || exit 1
    FULLNAME=`./pkgname $TAR | sed 's/.tgz//'`.deb || exit 1
    BUILDPATH=`./findbuild $PKG` || exit 1
    #calc MD5 sum of files that are used to generate the .deb.
    MD5="`cat $BUILDPATH.md5 $BASEPATH.arch $BASEPATH.version $BASEPATH.{preinst,postinst,prerm,postrm} 2>/dev/null| md5sum`" || exit 1
else
    TAR=`./findpkg $PKG` || exit 1
    FULLNAME=`echo $TAR | sed 's@.*/@@' | sed 's/.tgz//' `.deb || exit 1
    BUILDPATH=
    MD5=`cat $TAR| md5sum ` || exit 1
fi

echo "Tar= $TAR";
echo "Fullname= $FULLNAME";
echo "Buildpath= $BUILDPATH";
echo "MD5= $MD5";


#do we need to rebuild the .deb file?
#check if the md5 we build the .deb against still matches:
if ! grep -x "$MD5" $TARGET/$FULLNAME.syn3 &>/dev/null; then 
	echo -n " (creating) " >&2

	#tempdir and cleanup
	TMP=`mktemp -d` || exit 1
	trap "rm -r $TMP" 0
	
	#echo "Installing in $TMP:"
	TGZ=`./findpkg $PKG` || exit 1
	ROOT=$TMP installpkg $TGZ &>/dev/null || exit 1
	
	#HACK:we bepalen de runtime dependencys nu nog aan de hand van de build time deps. 
	#dit moet nog anders.
	#BUILDSCRIPT=`./findbuild $PKG`.SlackBuild || return 0
	#DEPS="`cat "$BUILDSCRIPT"|egrep '^#NEED:|^#DEP:'|cut -f2 -d':'`" || exit 1
	DEPS=
	
	#echo "Adding control file.."
	mkdir $TMP/DEBIAN
	CONTROL=$TMP/DEBIAN/control
	echo "Package: $PKG" 				        	> $CONTROL

	#hackerdehack
	VER=`cat $BASEPATH.version`
	if ! [ "$VER" ]; then
	    VER=0.0
	fi
	echo "Version: $VER"				>> $CONTROL
	echo "Maintainer: root@datux.nl"				>> $CONTROL
	echo "Description: Auto generated package by Syn-3 getdeb."   	>> $CONTROL
	if [ "$DEPS" ]; then
		echo "Depends: `echo $DEPS| sed 's/ /, /g'`"			>> $CONTROL
	fi
	
	#copy install scripts
	cp $BASEPATH.{preinst,postinst,prerm,postrm} $TMP/DEBIAN/ 2>/dev/null

	#translate architecture to a debian-compatible one.
	#this is either: all or i386
	DEBARCH=`cat $BASEPATH.arch | sed 's/noarch/all/' | sed 's/i.86/i386/'`;
	if ! [ "$DEBARCH" ]; then
	    DEBARCH=i386
	fi
	echo "Architecture: $DEBARCH" >> $CONTROL
	
	dpkg-deb --nocheck -b $TMP $TARGET/$PKG.deb >/dev/null || exit 1

	#store md5 for the situation we've build against
	echo "$MD5" > $TARGET/$FULLNAME.syn3
fi


#echo the absolute path to the created or cached deb package
echo "$TARGET/$FULLNAME"
exit 0